sequencer kit

256 tools. Generated from the plugin source; do not edit by hand.

Guide

The sequencer kit authors native ULevelSequence assets on Unreal Engine 4.27 through 5.8 without optional plugins: sequence timing, bindings, tracks, typed sections, keys, markers and folders, and the Level Sequence Actors that play them. Every time input is in seconds; replies also give the stored frame at the sequence tick resolution, the display rate and, for keys, the display frame. Ranges are [start, end): 0.0–2.0 lasts two seconds.

Recipe: animate an actor

1. sequencer.create {folder:'/Game/Cine', name:'LS_Intro', length:5, displayRate:30}.
2. Bind something: sequencer.add_possessable {name:'Hero', class:'Actor'} for a level actor (then sequencer.bind_actor with the level actor), or sequencer.add_spawnable with a template asset. sequencer.list_bindings returns GUIDs and names; either works as binding.
3. Create a typed section — the constructor also creates the track when the binding has none: sequencer.add_transform_section {sequence, binding:'Hero', start:0, end:5}. The reply's section.index is the index every key tool takes.
4. Key it: sequencer.add_transform_key {sequence, binding:'Hero', index:0, time:0, location:{x:0,y:0,z:0}}, then again at time:2 with another location and rotation:{x:0,y:90,z:0} (x = pitch, y = yaw, z = roll).
5. Shape the curve: sequencer.set_transform_key_interpolation {channel:'location.x', time:2, interpolation:'linear'} or sequencer.set_transform_key_tangent.
6. Check the result without playing: sequencer.evaluate_transform {time:1}.
7. Place a player: sequencer.spawn_sequence_actor {sequence, label:'IntroPlayer', autoPlay:true}.
8. Start PIE, then sequencer.play, sequencer.jump_to_seconds, sequencer.get_playback_state {actor:'IntroPlayer'}.

Sequence, bindings, tracks (structure)

• Sequence: create, duplicate, get, list, set_range (playback range), set_rates (display rate and tick resolution — change them before keying so rounding stays predictable).
• Bindings: select by GUID or unique name. add_possessable, add_spawnable, rename_binding, remove_binding (removes its tracks), get_binding, set_possessable_class, set_binding_parent, add_component_binding (parent must resolve to one actor); world links (RequiresWorld): bind_actor (empty binding creates a possessable named after the actor label), unbind_actor, list_bound_objects, find_binding_for_actor, clean_invalid_bindings, convert_to_spawnable / convert_to_possessable (move tracks, tags, folder and children to the new GUID; the source actor is kept unless deleteSourceActor), duplicate_binding, copy_bindings (moves bindings between sequences; possessables that do not resolve are listed in unbound), export_bindings, audit_bindings (run before clean_invalid_bindings after level changes); tags: list/add/remove/set_binding_tag(s), find_bindings_by_tag (runtime binding overrides), delete_binding_tag; spawnables: spawnable templates come from an actor class, actor Blueprint or StaticMesh (becomes a StaticMeshActor) and get a spawn track automatically; replace_spawnable_template, set_spawnable_ownership, set_spawnable_level, set_spawnable_respawn, set_spawnable_net_addressable.
• Tracks: list_tracks, get_track, add_track, remove_track, the typed add/get/set/remove_<kind>_track family (float/bool typed track tools take propertyPath of the right type — float/bool/integer/byte/enum/color/vector, vector = double vector on UE5; get/set/ remove may omit it when the binding has one track of that kind), display name, color, mute (evaluation disabled), lock (all sections locked), sorting, folders (add_folder, move_to_folder, ... — only root tracks and root bindings go into folders, Cameras/Shots paths; removing a folder moves its contents up). Select generic tracks by track (name from list_tracks) or kind+binding (+propertyPath); several matches return E_CONFLICT. The camera cut track is unique and unbound. Timeline: get_timeline_settings, view/working range and playback-range lock (UE 5.3+), evaluation type, read-only, markers (add_marker, ... — selected by unique label; comments need 5.2+, lock needs 5.3+).

Sections

Generic section tools select a section by kind + binding + index: list_sections, add_section, set_section_range, remove_section, duplicate_section, move_section, list_section_overlaps, get_section_state, set_section_active, set_section_locked, set_section_row, set_section_overlap_priority, set_section_pre_roll / _post_roll (frames at tick resolution), set_section_completion_mode (keep_state, restore_state, project_default), set_section_blend_type (absolute, additive, relative, additive_from_base, when the class supports it).

Typed constructors own one concrete section class and create the track when it is missing:

tool	track / section	selector
add_transform_section	3D transform	binding
add_float_section	float property	binding + property (a float UPROPERTY of the bound class, e.g. CustomTimeDilation)
add_bool_section	bool property	binding + property (e.g. bCanBeDamaged)
add_visibility_section	visibility (bHidden)	binding
add_enum_section	enum property (enum class)	binding + property (e.g. SpawnCollisionHandlingMethod)
add_byte_section	byte / TEnumAsByte property	binding + property (e.g. RemoteRole)
add_integer_section	int32 property	binding + property (e.g. InputPriority)
add_event_section	event trigger	binding optional (empty = master event track)
add_fade_section	fade (master)	none
add_audio_section	audio (master)	sound, end 0 = sound length
add_camera_cut_section	camera cut (master)	cameraBinding
add_skeletal_animation_section	skeletal animation	binding + animation

The property is validated against the bound class (possessable class or spawnable template) and must be a top-level property of the exact type; a wrong type returns E_INVALID_ARG. row: -1 places the section on the first free row. Typed section editors: get_section_details (ease, blend, channel and key counts, transform mask, fade color, sound, camera, animation, enum), set_section_ease (seconds; negative restores automatic easing), set_fade_section_color, set_audio_section_sound, set_camera_cut_section_camera, set_transform_section_mask, set_skeletal_animation_section.

Keys

Each key family owns one section class and selects its section with the same fields as the constructor (sequence, binding, property, index):

family	tools	value
transform	list/add/set/remove_transform_key, set_transform_key_interpolation, set_transform_key_tangent, set_transform_channel_default, set_transform_extrapolation, evaluate_transform, reduce_transform_keys, bake_transform	location, rotation {x: pitch, y: yaw, z: roll}, scale; keyLocation/keyRotation/keyScale pick the components
float	list/add/set/remove_float_key, set_float_key_interpolation, set_float_key_tangent, set_float_channel_default, set_float_extrapolation, evaluate_float, reduce_float_keys	value
fade	same set with fade	value 0 = clear, 1 = faded
bool / visibility	list/add/set/remove_bool_key, set_bool_channel_default, evaluate_bool (and _visibility_ equivalents)	value true/false (visibility: true = hidden)
enum	list/add/set/remove_enum_key, set_enum_channel_default	entry name (AlwaysSpawn or ESpawnActorCollisionHandlingMethod::AlwaysSpawn)
byte / integer	list/add/set/remove_byte_key / _integer_key, set_byte_channel_default / set_integer_channel_default, evaluate_integer	integer (byte 0–255)
event	list/add/set/remove_event_key	time only; set_event_key moves a key to newTime

• Key selection for single-channel families: key (handle from any list/add reply) or, when key is 0, the key at exactly time. Handles are editor-session values: after undo, reload or a checkpoint rollback, list again. Transform tools address all channels at a time; the per-channel tools (*_interpolation, *_tangent) also take channel: location.x/y/z, rotation.roll/pitch/yaw, scale.x/y/z, weight.
• add_*_key rewrites a key already on that frame and grows the section to contain the key.
• Interpolation: cubic (auto tangents), linear, constant, user, break. Tangents are in value units per tick-resolution frame (Sequencer's storage); a different arrive/leave value sets the broken mode. Extrapolation: constant, linear, cycle, cycle_with_offset, oscillate.
• set_*_channel_default sets the value used when a channel has no keys; clear:true removes it.
• reduce_*_keys removes keys the curve does not need within tolerance.
• bake_transform resamples every keyed transform channel over [start, end] (whole section when end <= start) at interval seconds (0 = one display frame), max 20000 samples.
• copy_keys / paste_keys (kind = transform, float, fade, bool, visibility, enum, byte, integer, event) copy every channel of a section (optionally within start–end) to a session clipboard and paste into a section of the same kind so the first key lands at time (replace:true first removes the target keys in the pasted span). Tick-resolution differences between sequences are converted.

Level Sequence Actors and playback

• spawn_sequence_actor, set_actor_sequence, set_sequence_actor_playback (auto-play, loop count, play rate, pause at end), set_binding_override (bind level actors to a sequence binding for this actor; reset:true removes the override), list_sequence_actors (world editor or pie) and remove_sequence_actor edit actors of the editor level (RequiresWorld).
• play, pause, stop, jump_to_seconds, get_playback_state are RequiresPIE: the engine creates sequence players only in game worlds. Assign the sequence in the editor level first, then start PIE and address the actor by the same label.

Gotchas

• A binding name that exists twice returns E_CONFLICT; pass the GUID. Two tracks of the same kind and property on one binding also return E_CONFLICT.
• Transform sections with channel overrides (5.x noise etc.) are rejected by the key tools.
• Event keys carry no endpoint: binding them to director Blueprint functions is done in the Sequencer UI.
• Skeletal animation play rate is not exposed (its type differs between 4.27 and 5.x).
• The playback tools are not exercised by edit.self_test because no Level Sequence ships with the engine for the PIE pass; the authoring tools are.

Tools

Legend. risk 0 = read-only, 1 = harmless editor op, 2 = modifies asset, 3 = deletes/replaces asset, 4 = project/config/build op, 5 = potentially destructive (calls above MaxAutoRisk need "_confirm": true). mutates = runs in a transaction (edit.undo reverts). requires PIE / requires world = refused without a PIE session / an open level. requires plugin = unavailable while the plugin is disabled. dryRun = honours the dryRun argument. smoke = covered by edit.self_test.

sequencer.add_attach_track (risk 2, mutates, smoke)

Adds or returns the bound 3D attach (parent-to-actor constraint) track.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
binding	string	required. Binding GUID or display name.

Returns: track, existed, message.

sequencer.add_audio_section (risk 2, mutates, smoke)

Adds a sound on the master audio track at start (length of the sound unless end is given).

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
sound	string	required. Sound asset path (SoundWave or SoundCue), e.g. /Engine/EngineSounds/WhiteNoise.
start	number	Inclusive start in seconds. Default 0.0.
end	number	Exclusive end in seconds; 0 keeps the length of the sound. Default 0.0.
row	integer	Overlap row; -1 places the section on the first free row. Default -1.

Returns: section, details, trackCreated, message.

sequencer.add_audio_track (risk 2, mutates, smoke)

Adds or returns the audio track at the root (empty binding) or on a binding.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
binding	string	Binding GUID or name; empty selects/creates the root track.

Returns: track, existed, message.

sequencer.add_binding_tag (risk 2, mutates, smoke)

Adds a tag to a binding (tags let runtime code override bindings by name).

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
binding	string	required. Binding GUID or name.
tag	string	required. Tag name.

Returns: tags, count, message.

sequencer.add_bool_key (risk 2, mutates, smoke)

Adds (or rewrites) a bool property key.

Argument	Type	Description
time	number	required. Key time in seconds.
value	boolean	Key value (for visibility: true = hidden, matching the bHidden property). Default true.

Returns: section, channels, keys, count, affected, message.

sequencer.add_bool_section (risk 2, mutates, smoke)

Adds a bool property section (creates the bool track for that property when missing).

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
binding	string	Binding GUID or display name (required for bound kinds; empty for master tracks).
property	string	Property name on the bound class for property tracks, e.g. CustomTimeDilation (float), bCanBeDamaged (bool), SpawnCollisionHandlingMethod (enum), RemoteRole (byte), InputPriority (integer).
start	number	Inclusive start in seconds. Default 0.0.
end	number	required. Exclusive end in seconds.
row	integer	Overlap row; -1 places the section on the first free row. Default -1.

Returns: section, details, trackCreated, message.

sequencer.add_bool_track (risk 2, mutates, smoke)

Adds or returns the bool track animating a bool property of the binding; the property path is validated against the bound class.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
binding	string	required. Binding GUID or name.
propertyPath	string	Property path on the bound class, e.g. CustomTimeDilation or a struct member path. Required by add; get/remove accept it empty when the binding has exactly one track of that kind.

Returns: track, existed, message.

sequencer.add_byte_key (risk 2, mutates, smoke)

Adds (or rewrites) a byte property key (0-255).

Argument	Type	Description
time	number	required. Key time in seconds.
value	integer	Key value (byte channels accept 0-255). Default 0.

Returns: section, channels, keys, count, affected, message.

sequencer.add_byte_section (risk 2, mutates, smoke)

Adds a byte property section (uint8 or TEnumAsByte property).

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
binding	string	Binding GUID or display name (required for bound kinds; empty for master tracks).
property	string	Property name on the bound class for property tracks, e.g. CustomTimeDilation (float), bCanBeDamaged (bool), SpawnCollisionHandlingMethod (enum), RemoteRole (byte), InputPriority (integer).
start	number	Inclusive start in seconds. Default 0.0.
end	number	required. Exclusive end in seconds.
row	integer	Overlap row; -1 places the section on the first free row. Default -1.

Returns: section, details, trackCreated, message.

sequencer.add_byte_track (risk 2, mutates, smoke)

Adds or returns the byte track animating a uint8 / TEnumAsByte property of the binding; the property path is validated against the bound class.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
binding	string	required. Binding GUID or name.
propertyPath	string	Property path on the bound class, e.g. CustomTimeDilation or a struct member path. Required by add; get/remove accept it empty when the binding has exactly one track of that kind.

Returns: track, existed, message.

sequencer.add_camera_cut_section (risk 2, mutates, smoke)

Adds a camera cut to the master camera cut track that activates the camera of cameraBinding.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
cameraBinding	string	required. Binding GUID or display name of the camera the cut activates.
start	number	Inclusive start in seconds. Default 0.0.
end	number	required. Exclusive end in seconds.

Returns: section, details, trackCreated, message.

sequencer.add_camera_cut_track (risk 2, mutates, smoke)

Adds or returns the root camera cut (one per sequence) track.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.

Returns: track, existed, message.

sequencer.add_camera_shake_track (risk 2, mutates, smoke)

Adds or returns the bound camera shake track.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
binding	string	required. Binding GUID or display name.

Returns: track, existed, message.

sequencer.add_color_track (risk 2, mutates, smoke)

Adds or returns the color track animating a FLinearColor or FColor property of the binding; the property path is validated against the bound class.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
binding	string	required. Binding GUID or name.
propertyPath	string	Property path on the bound class, e.g. CustomTimeDilation or a struct member path. Required by add; get/remove accept it empty when the binding has exactly one track of that kind.

Returns: track, existed, message.

sequencer.add_component_binding (risk 2, mutates, requires world, smoke)

Adds a child possessable bound to a component of the actor its parent possessable resolves to.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
binding	string	required. Parent possessable GUID or name; it must resolve to an actor in the editor world.
component	string	required. Component object name on that actor, e.g. StaticMeshComponent0 (see actor.get_components).
name	string	Display name of the new binding. Empty uses the component name.

Returns: binding, changedActors, message.

sequencer.add_enum_key (risk 2, mutates, smoke)

Adds (or rewrites) an enum property key by entry name.

Argument	Type	Description
time	number	required. Key time in seconds.
value	string	required. Enum entry name, short (AlwaysSpawn) or qualified (ESpawnActorCollisionHandlingMethod::AlwaysSpawn).

Returns: section, channels, keys, count, affected, message.

sequencer.add_enum_section (risk 2, mutates, smoke)

Adds an enum property section; the property must be an enum class (FEnumProperty) of the bound class.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
binding	string	Binding GUID or display name (required for bound kinds; empty for master tracks).
property	string	Property name on the bound class for property tracks, e.g. CustomTimeDilation (float), bCanBeDamaged (bool), SpawnCollisionHandlingMethod (enum), RemoteRole (byte), InputPriority (integer).
start	number	Inclusive start in seconds. Default 0.0.
end	number	required. Exclusive end in seconds.
row	integer	Overlap row; -1 places the section on the first free row. Default -1.

Returns: section, details, trackCreated, message.

sequencer.add_enum_track (risk 2, mutates, smoke)

Adds or returns the enum track animating a enum-class property of the binding; the property path is validated against the bound class.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
binding	string	required. Binding GUID or name.
propertyPath	string	Property path on the bound class, e.g. CustomTimeDilation or a struct member path. Required by add; get/remove accept it empty when the binding has exactly one track of that kind.

Returns: track, existed, message.

sequencer.add_event_key (risk 2, mutates, smoke)

Adds a trigger key to an event section (existing key at that frame is kept).

Argument	Type	Description
time	number	required. Time in seconds (rounded to the sequence tick resolution).

Returns: section, channels, keys, count, affected, message.

sequencer.add_event_section (risk 2, mutates, smoke)

Adds an event trigger section to the master event track (binding empty) or to the binding's event track, creating the track when missing.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
binding	string	Binding GUID or display name (required for bound kinds; empty for master tracks).
property	string	Property name on the bound class for property tracks, e.g. CustomTimeDilation (float), bCanBeDamaged (bool), SpawnCollisionHandlingMethod (enum), RemoteRole (byte), InputPriority (integer).
start	number	Inclusive start in seconds. Default 0.0.
end	number	required. Exclusive end in seconds.
row	integer	Overlap row; -1 places the section on the first free row. Default -1.

Returns: section, details, trackCreated, message.

sequencer.add_event_track (risk 2, mutates, smoke)

Adds or returns the event track at the root (empty binding) or on a binding.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
binding	string	Binding GUID or name; empty selects/creates the root track.

Returns: track, existed, message.

sequencer.add_fade_key (risk 2, mutates, smoke)

Adds (or rewrites) a fade amount key (0 = clear, 1 = fully faded).

Argument	Type	Description
time	number	required. Key time in seconds.
value	number	Key value. Default 0.0.
interpolation	string	Interpolation: cubic (auto tangents), linear, constant, user or break. Default TEXT("cubic").

Returns: section, channels, keys, count, affected, message.

sequencer.add_fade_section (risk 2, mutates, smoke)

Adds a fade section to the master fade track (creating the track when missing).

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
binding	string	Binding GUID or display name (required for bound kinds; empty for master tracks).
property	string	Property name on the bound class for property tracks, e.g. CustomTimeDilation (float), bCanBeDamaged (bool), SpawnCollisionHandlingMethod (enum), RemoteRole (byte), InputPriority (integer).
start	number	Inclusive start in seconds. Default 0.0.
end	number	required. Exclusive end in seconds.
row	integer	Overlap row; -1 places the section on the first free row. Default -1.

Returns: section, details, trackCreated, message.

sequencer.add_fade_track (risk 2, mutates, smoke)

Adds or returns the root fade track.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.

Returns: track, existed, message.

sequencer.add_float_key (risk 2, mutates, smoke)

Adds (or rewrites) a float property key at one time.

Argument	Type	Description
time	number	required. Key time in seconds.
value	number	Key value. Default 0.0.
interpolation	string	Interpolation: cubic (auto tangents), linear, constant, user or break. Default TEXT("cubic").

Returns: section, channels, keys, count, affected, message.

sequencer.add_float_section (risk 2, mutates, smoke)

Adds a float property section (creates the float track for that property when missing; the property must be a float of the bound class).

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
binding	string	Binding GUID or display name (required for bound kinds; empty for master tracks).
property	string	Property name on the bound class for property tracks, e.g. CustomTimeDilation (float), bCanBeDamaged (bool), SpawnCollisionHandlingMethod (enum), RemoteRole (byte), InputPriority (integer).
start	number	Inclusive start in seconds. Default 0.0.
end	number	required. Exclusive end in seconds.
row	integer	Overlap row; -1 places the section on the first free row. Default -1.

Returns: section, details, trackCreated, message.

sequencer.add_float_track (risk 2, mutates, smoke)

Adds or returns the float track animating a float property of the binding; the property path is validated against the bound class.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
binding	string	required. Binding GUID or name.
propertyPath	string	Property path on the bound class, e.g. CustomTimeDilation or a struct member path. Required by add; get/remove accept it empty when the binding has exactly one track of that kind.

Returns: track, existed, message.

sequencer.add_folder (risk 2, mutates, smoke)

Adds a folder at the root or under a parent folder.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
name	string	required. New folder name (no slashes).
parent	string	Parent folder path; empty creates a root folder.

Returns: folders, count, message.

sequencer.add_integer_key (risk 2, mutates, smoke)

Adds (or rewrites) an integer property key.

Argument	Type	Description
time	number	required. Key time in seconds.
value	integer	Key value (byte channels accept 0-255). Default 0.

Returns: section, channels, keys, count, affected, message.

sequencer.add_integer_section (risk 2, mutates, smoke)

Adds an integer property section (int32 property).

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
binding	string	Binding GUID or display name (required for bound kinds; empty for master tracks).
property	string	Property name on the bound class for property tracks, e.g. CustomTimeDilation (float), bCanBeDamaged (bool), SpawnCollisionHandlingMethod (enum), RemoteRole (byte), InputPriority (integer).
start	number	Inclusive start in seconds. Default 0.0.
end	number	required. Exclusive end in seconds.
row	integer	Overlap row; -1 places the section on the first free row. Default -1.

Returns: section, details, trackCreated, message.

sequencer.add_integer_track (risk 2, mutates, smoke)

Adds or returns the integer track animating a int32 property of the binding; the property path is validated against the bound class.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
binding	string	required. Binding GUID or name.
propertyPath	string	Property path on the bound class, e.g. CustomTimeDilation or a struct member path. Required by add; get/remove accept it empty when the binding has exactly one track of that kind.

Returns: track, existed, message.

sequencer.add_level_visibility_track (risk 2, mutates, smoke)

Adds or returns the root level visibility (streaming level show/hide) track.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.

Returns: track, existed, message.

sequencer.add_marker (risk 2, mutates, smoke)

Adds a marked frame at a time in seconds with a unique label.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
time	number	required. Marker time in seconds.
label	string	required. Unique marker label (markers are selected by label).
comment	string	Free comment (UE 5.2+; rejected on older engines when non-empty).
customColor	boolean	True applies color; false keeps the Sequencer default marker color. Default false.
color	UeaSequencerTrackColor	Marker color (linear 0..1) used when customColor is true.
determinismFence	boolean	Evaluation never crosses this frame in a single step (determinism fence). Default false.

Returns: markers, count, shownGlobally, locked, message.

sequencer.add_path_track (risk 2, mutates, smoke)

Adds or returns the bound 3D path (follow a spline) track.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
binding	string	required. Binding GUID or display name.

Returns: track, existed, message.

sequencer.add_play_rate_track (risk 2, mutates, smoke)

Adds or returns the root play rate (time dilation) track.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.

Returns: track, existed, message.

sequencer.add_possessable (risk 2, mutates, smoke)

Adds a sequence-local possessable class declaration (bind it to a level actor with sequencer.bind_actor).

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
name	string	required. Display name for the binding.
class	string	required. Class path or short class name, such as Actor or CineCameraActor.

Returns: bindings, count, message.

sequencer.add_section (risk 2, mutates, smoke)

Adds a default section to the selected track.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
kind	string	required. Track kind: transform, audio, fade, camera_cut or cinematic_shot.
binding	string	Binding GUID or name for a bound track.
index	integer	Zero-based section index in the selected track. Default 0.

Returns: sections, count, message.

sequencer.add_shot_track (risk 2, mutates, smoke)

Adds or returns the root cinematic shot track.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.

Returns: track, existed, message.

sequencer.add_skeletal_animation_section (risk 2, mutates)

Adds an animation section (AnimSequence or montage) to the binding's skeletal animation track, creating the track when missing.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
binding	string	required. Binding GUID or display name of the skeletal mesh actor or component.
animation	string	required. Animation sequence or montage asset path.
start	number	Inclusive start in seconds. Default 0.0.
row	integer	Overlap row; -1 places the section on the first free row. Default -1.

Returns: section, details, trackCreated, message.

sequencer.add_skeletal_animation_track (risk 2, mutates, smoke)

Adds or returns the bound skeletal animation track.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
binding	string	required. Binding GUID or display name.

Returns: track, existed, message.

sequencer.add_spawn_track (risk 2, mutates, smoke)

Adds or returns the bound spawn (controls when a spawnable exists; spawnables only) track.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
binding	string	required. Binding GUID or display name.

Returns: track, existed, message.

sequencer.add_spawnable (risk 2, mutates, smoke)

Adds a spawnable whose actor template is built from an actor class, actor Blueprint or StaticMesh asset; also adds its spawn track.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
name	string	required. Display name for the binding.
template	string	required. Asset or object path used as the spawnable object template.

Returns: bindings, count, message.

sequencer.add_sub_track (risk 2, mutates, smoke)

Adds or returns the root subsequence track.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.

Returns: track, existed, message.

sequencer.add_track (risk 2, mutates, smoke)

Adds or returns a transform (bound), audio, fade, camera-cut or cinematic-shot (root) track. Other kinds have typed add__track tools.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
kind	string	required. Track kind: transform, audio, fade, camera_cut or cinematic_shot.
binding	string	Binding GUID or name for transform tracks. Empty creates a master track.

Returns: tracks, count, message.

sequencer.add_transform_key (risk 2, mutates, smoke)

Keys location, rotation ({x: pitch, y: yaw, z: roll}) and/or scale at one time; existing keys at that frame are rewritten. The section grows to contain the key.

Argument	Type	Description
time	number	required. Key time in seconds.
location	{x,y,z}	Location in centimeters.
rotation	{x,y,z}	Rotation in degrees as {x: pitch, y: yaw, z: roll}.
scale	{x,y,z}	Scale factors. Default FUeaVec3(1.0, 1.0, 1.0).
keyLocation	boolean	Write the three location channels. Default true.
keyRotation	boolean	Write the three rotation channels. Default true.
keyScale	boolean	Write the three scale channels. Default true.
interpolation	string	Interpolation: cubic (auto tangents), linear, constant, user or break. Default TEXT("cubic").

Returns: section, channels, keys, count, affected, message.

sequencer.add_transform_section (risk 2, mutates, smoke)

Adds a 3D transform section to the binding's transform track (creating the track when missing). Returns the section with its index.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
binding	string	Binding GUID or display name (required for bound kinds; empty for master tracks).
property	string	Property name on the bound class for property tracks, e.g. CustomTimeDilation (float), bCanBeDamaged (bool), SpawnCollisionHandlingMethod (enum), RemoteRole (byte), InputPriority (integer).
start	number	Inclusive start in seconds. Default 0.0.
end	number	required. Exclusive end in seconds.
row	integer	Overlap row; -1 places the section on the first free row. Default -1.

Returns: section, details, trackCreated, message.

sequencer.add_transform_track (risk 2, mutates, smoke)

Adds or returns the bound 3D transform track.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
binding	string	required. Binding GUID or display name.

Returns: track, existed, message.

sequencer.add_vector_track (risk 2, mutates, smoke)

Adds or returns the vector track animating a FVector, FVector2D or FVector4 property (double-precision vector track on UE5) of the binding; the property path is validated against the bound class.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
binding	string	required. Binding GUID or name.
propertyPath	string	Property path on the bound class, e.g. CustomTimeDilation or a struct member path. Required by add; get/remove accept it empty when the binding has exactly one track of that kind.

Returns: track, existed, message.

sequencer.add_visibility_key (risk 2, mutates, smoke)

Adds (or rewrites) a visibility key (value true = hidden).

Argument	Type	Description
time	number	required. Key time in seconds.
value	boolean	Key value (for visibility: true = hidden, matching the bHidden property). Default true.

Returns: section, channels, keys, count, affected, message.

sequencer.add_visibility_section (risk 2, mutates, smoke)

Adds a visibility section (bHidden) to the binding's visibility track (creating the track when missing).

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
binding	string	Binding GUID or display name (required for bound kinds; empty for master tracks).
property	string	Property name on the bound class for property tracks, e.g. CustomTimeDilation (float), bCanBeDamaged (bool), SpawnCollisionHandlingMethod (enum), RemoteRole (byte), InputPriority (integer).
start	number	Inclusive start in seconds. Default 0.0.
end	number	required. Exclusive end in seconds.
row	integer	Overlap row; -1 places the section on the first free row. Default -1.

Returns: section, details, trackCreated, message.

sequencer.add_visibility_track (risk 2, mutates, smoke)

Adds or returns the bound visibility (bHidden on actors, bHiddenInGame on components) track.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
binding	string	required. Binding GUID or display name.

Returns: track, existed, message.

sequencer.audit_bindings (risk 0, requires world, smoke)

Audits bindings: unresolved or partially resolved possessables, missing/invalid templates, missing parents, duplicate names, orphan or empty bindings.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.

Returns: bindings, issues, issueCount, message.

sequencer.bake_transform (risk 2, mutates, smoke)

Resamples every keyed transform channel over a time range into evenly spaced keys (default: one key per display frame over the section range).

Argument	Type	Description
start	number	Bake start in seconds. When end <= start the whole section range is baked. Default 0.0.
end	number	Bake end in seconds (inclusive sample). Default 0.0.
interval	number	Sample spacing in seconds; 0 uses one display-rate frame. Default 0.0.
interpolation	string	Interpolation of the baked keys: linear, constant or cubic. Default TEXT("linear").

Returns: section, channels, keys, count, affected, message.

sequencer.bind_actor (risk 2, mutates, requires world, smoke)

Binds a level actor to a possessable (replacing or adding to its objects); an empty binding creates a new possessable for the actor.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
actor	string	required. Level actor label or name (or class: for the only actor of a class) in the editor world.
binding	string	Possessable GUID or name to bind. Empty creates a new possessable named after the actor label.
replace	boolean	True replaces every object currently bound to the possessable; false adds the actor to them. Default true.

Returns: binding, changedActors, message.

sequencer.clean_invalid_bindings (risk 2, mutates, requires world, smoke)

Drops binding references that no longer resolve in the editor world, for every possessable.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.

Returns: bindings, issues, issueCount, message.

sequencer.clear_markers (risk 3, mutates, destructive, smoke)

Removes every marker of the sequence.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.

Returns: markers, count, shownGlobally, locked, message.

sequencer.convert_to_possessable (risk 2, mutates, requires world, smoke)

Converts a spawnable into a possessable by spawning its template into the editor level (labelled with the binding name); tracks, tags, folder and children move over.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
binding	string	required. Binding GUID or name.
deleteSourceActor	boolean	convert_to_spawnable only: destroy the level actor the possessable was bound to. Default false.

Returns: binding, changedActors, message.

sequencer.convert_to_spawnable (risk 2, mutates, requires world, smoke)

Converts a possessable into a spawnable using its bound actor as template; tracks, tags, folder and child bindings move to the new GUID.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
binding	string	required. Binding GUID or name.
deleteSourceActor	boolean	convert_to_spawnable only: destroy the level actor the possessable was bound to. Default false.

Returns: binding, changedActors, message.

sequencer.copy_bindings (risk 2, mutates, requires world, smoke)

Imports bindings from another Level Sequence: declarations, tracks, tags, spawnable templates and possessable actor references (new GUIDs).

Argument	Type	Description
sequence	string	required. Source Level Sequence asset path.
target	string	required. Target Level Sequence asset path (must differ from the source).
bindings	array of string	Binding GUIDs or names to copy. Empty copies every root binding (children follow their parents).

Returns: created, count, tracks, unbound, message.

sequencer.copy_keys (risk 0, smoke)

Copies the keys of one typed section (all channels, optional time range) to the editor-session key clipboard.

Argument	Type	Description
kind	string	required. Section kind: transform, float, bool, visibility, enum, byte, integer, event or fade.
start	number	Copy start in seconds. When end <= start every key is copied. Default 0.0.
end	number	Copy end in seconds (inclusive). Default 0.0.

Returns: section, channels, keys, count, affected, message.

sequencer.create (risk 2, mutates, smoke)

Creates a Level Sequence with a playback range in seconds and display rate in frames per second.

Argument	Type	Description
folder	string	required. Destination content folder under /Game.
name	string	required. Bare Level Sequence asset name.
length	number	Initial playback length in seconds. Default 5.0.
displayRate	number	Editor display rate in frames per second. Default 30.0.

Returns: sequence, message.

sequencer.delete_binding_tag (risk 3, mutates, destructive, smoke)

Deletes a tag from every binding and forgets it.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
tag	string	required. Tag name.

Returns: tags, count, message.

sequencer.duplicate (risk 2, mutates, smoke)

Duplicates a Level Sequence asset (bindings, tracks, markers and settings) to a new name.

Argument	Type	Description
sequence	string	required. Source Level Sequence asset path.
name	string	required. Bare name of the copy.
folder	string	Destination folder under /Game; empty uses the source folder.

Returns: sequence, message.

sequencer.duplicate_binding (risk 2, mutates, requires world, smoke)

Duplicates a binding with copies of its tracks (spawnables get a copied template; possessables are bound to the same objects).

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
binding	string	required. Source binding GUID or name.
name	string	required. Display name of the copy.

Returns: binding, changedActors, message.

sequencer.duplicate_section (risk 2, mutates, smoke)

Duplicates one native section, preserving its class and authored data.

Argument	Type	Description
start	number	required. New inclusive start time in seconds.
row	integer	New zero-based row; negative retains source row. Default -1.

Returns: sections, count, message.

sequencer.evaluate_bool (risk 0, smoke)

Evaluates a bool property section at one time.

Argument	Type	Description
time	number	required. Time in seconds (rounded to the sequence tick resolution).

Returns: section, time, frame, values, message.

sequencer.evaluate_fade (risk 0, smoke)

Evaluates the fade amount at one time.

Argument	Type	Description
time	number	required. Time in seconds (rounded to the sequence tick resolution).

Returns: section, time, frame, values, message.

sequencer.evaluate_float (risk 0, smoke)

Evaluates a float property section at one time.

Argument	Type	Description
time	number	required. Time in seconds (rounded to the sequence tick resolution).

Returns: section, time, frame, values, message.

sequencer.evaluate_integer (risk 0, smoke)

Evaluates an integer property section at one time.

Argument	Type	Description
time	number	required. Time in seconds (rounded to the sequence tick resolution).

Returns: section, time, frame, values, message.

sequencer.evaluate_transform (risk 0, smoke)

Evaluates location, rotation, scale and weight of a transform section at one time.

Argument	Type	Description
time	number	required. Time in seconds (rounded to the sequence tick resolution).

Returns: section, time, frame, values, message.

sequencer.evaluate_visibility (risk 0, smoke)

Evaluates a visibility section at one time (true = hidden).

Argument	Type	Description
time	number	required. Time in seconds (rounded to the sequence tick resolution).

Returns: section, time, frame, values, message.

sequencer.export_bindings (risk 0, requires world, smoke)

Exports every binding with class, parent, tags, tracks, folder, spawnable settings and resolved objects (the read side of copy_bindings).

Argument	Type	Description
sequence	string	required. Level Sequence asset path.

Returns: sequence, bindings, count.

sequencer.find_binding_for_actor (risk 0, requires world, smoke)

Finds the possessable that resolves to a level actor.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
actor	string	required. Level actor label or name in the editor world.

Returns: binding, changedActors, message.

sequencer.find_bindings_by_tag (risk 0, smoke)

Lists the bindings carrying a tag.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
tag	string	required. Tag name.

Returns: tags, count, message.

sequencer.get (risk 0, smoke)

Gets timing and native binding/track counts for one Level Sequence.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.

Returns: sequence, message.

sequencer.get_attach_track (risk 0, smoke)

Gets the bound 3D attach (parent-to-actor constraint) track.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
binding	string	required. Binding GUID or display name.

Returns: track, existed, message.

sequencer.get_audio_track (risk 0, smoke)

Gets the root or bound audio track.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
binding	string	Binding GUID or name; empty selects/creates the root track.

Returns: track, existed, message.

sequencer.get_binding (risk 0, requires world, smoke)

Gets one binding: type, class, parent/children, tags, tracks, folder, spawnable settings and the objects it resolves to in the editor world.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
binding	string	required. Binding GUID or display name.

Returns: binding, changedActors, message.

sequencer.get_bool_track (risk 0, smoke)

Gets the bool property track of a binding (propertyPath optional when there is only one).

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
binding	string	required. Binding GUID or name.
propertyPath	string	Property path on the bound class, e.g. CustomTimeDilation or a struct member path. Required by add; get/remove accept it empty when the binding has exactly one track of that kind.

Returns: track, existed, message.

sequencer.get_byte_track (risk 0, smoke)

Gets the byte property track of a binding (propertyPath optional when there is only one).

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
binding	string	required. Binding GUID or name.
propertyPath	string	Property path on the bound class, e.g. CustomTimeDilation or a struct member path. Required by add; get/remove accept it empty when the binding has exactly one track of that kind.

Returns: track, existed, message.

sequencer.get_camera_cut_track (risk 0, smoke)

Gets the root camera cut (one per sequence) track.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.

Returns: track, existed, message.

sequencer.get_camera_shake_track (risk 0, smoke)

Gets the bound camera shake track.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
binding	string	required. Binding GUID or display name.

Returns: track, existed, message.

sequencer.get_color_track (risk 0, smoke)

Gets the color property track of a binding (propertyPath optional when there is only one).

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
binding	string	required. Binding GUID or name.
propertyPath	string	Property path on the bound class, e.g. CustomTimeDilation or a struct member path. Required by add; get/remove accept it empty when the binding has exactly one track of that kind.

Returns: track, existed, message.

sequencer.get_enum_track (risk 0, smoke)

Gets the enum property track of a binding (propertyPath optional when there is only one).

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
binding	string	required. Binding GUID or name.
propertyPath	string	Property path on the bound class, e.g. CustomTimeDilation or a struct member path. Required by add; get/remove accept it empty when the binding has exactly one track of that kind.

Returns: track, existed, message.

sequencer.get_event_track (risk 0, smoke)

Gets the root or bound event track.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
binding	string	Binding GUID or name; empty selects/creates the root track.

Returns: track, existed, message.

sequencer.get_fade_track (risk 0, smoke)

Gets the root fade track.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.

Returns: track, existed, message.

sequencer.get_float_track (risk 0, smoke)

Gets the float property track of a binding (propertyPath optional when there is only one).

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
binding	string	required. Binding GUID or name.
propertyPath	string	Property path on the bound class, e.g. CustomTimeDilation or a struct member path. Required by add; get/remove accept it empty when the binding has exactly one track of that kind.

Returns: track, existed, message.

sequencer.get_integer_track (risk 0, smoke)

Gets the integer property track of a binding (propertyPath optional when there is only one).

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
binding	string	required. Binding GUID or name.
propertyPath	string	Property path on the bound class, e.g. CustomTimeDilation or a struct member path. Required by add; get/remove accept it empty when the binding has exactly one track of that kind.

Returns: track, existed, message.

sequencer.get_level_visibility_track (risk 0, smoke)

Gets the root level visibility (streaming level show/hide) track.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.

Returns: track, existed, message.

sequencer.get_path_track (risk 0, smoke)

Gets the bound 3D path (follow a spline) track.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
binding	string	required. Binding GUID or display name.

Returns: track, existed, message.

sequencer.get_play_rate_track (risk 0, smoke)

Gets the root play rate (time dilation) track.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.

Returns: track, existed, message.

sequencer.get_playback_state (risk 0, requires PIE)

Reports playing/paused state, current time, duration and rate of a PIE sequence player.

Argument	Type	Description
actor	string	required. Label or object name of the Level Sequence Actor.

Returns: actor, sequence, playing, paused, time, frame, displayRate, duration, playRate, message.

sequencer.get_section_details (risk 0, smoke)

Returns the class-specific state of a typed section: ease, blend, channels/keys, transform mask, fade color, sound, camera binding, animation or enum.

Argument	Type	Description
kind	string	required. Section kind: transform, float, bool, visibility, enum, byte, integer, event, fade, audio, camera_cut or skeletal_animation.

Returns: section, details, trackCreated, message.

sequencer.get_section_state (risk 0, smoke)

Gets active, row, priority and pre/post-roll state for one section.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
kind	string	required. Track kind: transform, audio, fade, camera_cut or cinematic_shot.
binding	string	Binding GUID or name for a bound track.
index	integer	Zero-based section index in the selected track. Default 0.

Returns: section, message.

sequencer.get_shot_track (risk 0, smoke)

Gets the root cinematic shot track.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.

Returns: track, existed, message.

sequencer.get_skeletal_animation_track (risk 0, smoke)

Gets the bound skeletal animation track.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
binding	string	required. Binding GUID or display name.

Returns: track, existed, message.

sequencer.get_spawn_track (risk 0, smoke)

Gets the bound spawn (controls when a spawnable exists; spawnables only) track.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
binding	string	required. Binding GUID or display name.

Returns: track, existed, message.

sequencer.get_sub_track (risk 0, smoke)

Gets the root subsequence track.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.

Returns: track, existed, message.

sequencer.get_timeline_settings (risk 0, smoke)

Gets working, view, locking and evaluation settings for a Level Sequence.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.

Returns: timeline, message.

sequencer.get_track (risk 0, smoke)

Gets one track: display name, property binding, color, mute/lock state, rows, sorting order and folder.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
track	string	Track object name from sequencer.list_tracks. Leave empty to select by kind.
kind	string	Track kind (transform, float, bool, visibility, audio, event, camera_cut, ...). Used when track is empty.
binding	string	Binding GUID or name for bound tracks; empty selects a root track.
propertyPath	string	Property path for property tracks when the binding has several of the same kind.

Returns: track, message.

sequencer.get_transform_track (risk 0, smoke)

Gets the bound 3D transform track.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
binding	string	required. Binding GUID or display name.

Returns: track, existed, message.

sequencer.get_vector_track (risk 0, smoke)

Gets the vector property track of a binding (propertyPath optional when there is only one).

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
binding	string	required. Binding GUID or name.
propertyPath	string	Property path on the bound class, e.g. CustomTimeDilation or a struct member path. Required by add; get/remove accept it empty when the binding has exactly one track of that kind.

Returns: track, existed, message.

sequencer.get_visibility_track (risk 0, smoke)

Gets the bound visibility (bHidden on actors, bHiddenInGame on components) track.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
binding	string	required. Binding GUID or display name.

Returns: track, existed, message.

sequencer.jump_to_seconds (risk 0, requires PIE)

Jumps the PIE player to a time in seconds without triggering events in between.

Argument	Type	Description
time	number	required. Target time in seconds from the playback start.

Returns: actor, sequence, playing, paused, time, frame, displayRate, duration, playRate, message.

sequencer.list (risk 0, smoke)

Lists Level Sequence assets under a content folder.

Argument	Type	Description
folder	string	Content folder to search. Default TEXT("/Game").
limit	integer	Maximum sequences returned. Default 100.

Returns: sequences, count.

sequencer.list_binding_tags (risk 0, smoke)

Lists every binding tag of the sequence with the bindings it groups.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.

Returns: tags, count, message.

sequencer.list_bindings (risk 0, smoke)

Lists sequence possessables and spawnables with stable GUID selectors.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.

Returns: bindings, count, message.

sequencer.list_bool_keys (risk 0, smoke)

Lists the keys and default of a bool property section.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
binding	string	Binding GUID or display name that owns the track. Empty selects a master track (fade, audio, camera cut, master event track).
property	string	Property path of property tracks (float, bool, enum, byte, integer), e.g. CustomTimeDilation. Ignored by transform, visibility, event and fade.
index	integer	Zero-based section index in the selected track. Default 0.

Returns: section, channels, keys, count, affected, message.

sequencer.list_bound_objects (risk 0, requires world, smoke)

Lists the objects a binding resolves to in the editor world (children resolve inside their parent's object).

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
binding	string	required. Binding GUID or display name.

Returns: guid, binding, objects, count.

sequencer.list_byte_keys (risk 0, smoke)

Lists the keys of a byte property section (entry names when the byte carries an enum).

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
binding	string	Binding GUID or display name that owns the track. Empty selects a master track (fade, audio, camera cut, master event track).
property	string	Property path of property tracks (float, bool, enum, byte, integer), e.g. CustomTimeDilation. Ignored by transform, visibility, event and fade.
index	integer	Zero-based section index in the selected track. Default 0.

Returns: section, channels, keys, count, affected, message.

sequencer.list_enum_keys (risk 0, smoke)

Lists the keys of an enum property section with entry names.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
binding	string	Binding GUID or display name that owns the track. Empty selects a master track (fade, audio, camera cut, master event track).
property	string	Property path of property tracks (float, bool, enum, byte, integer), e.g. CustomTimeDilation. Ignored by transform, visibility, event and fade.
index	integer	Zero-based section index in the selected track. Default 0.

Returns: section, channels, keys, count, affected, message.

sequencer.list_event_keys (risk 0, smoke)

Lists the trigger keys of an event section (binding empty = master event track). Endpoint assignment needs the Sequencer director Blueprint and is not exposed.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
binding	string	Binding GUID or display name that owns the track. Empty selects a master track (fade, audio, camera cut, master event track).
property	string	Property path of property tracks (float, bool, enum, byte, integer), e.g. CustomTimeDilation. Ignored by transform, visibility, event and fade.
index	integer	Zero-based section index in the selected track. Default 0.

Returns: section, channels, keys, count, affected, message.

sequencer.list_fade_keys (risk 0, smoke)

Lists the fade amount keys (0 = clear, 1 = fully faded) of a fade section.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
binding	string	Binding GUID or display name that owns the track. Empty selects a master track (fade, audio, camera cut, master event track).
property	string	Property path of property tracks (float, bool, enum, byte, integer), e.g. CustomTimeDilation. Ignored by transform, visibility, event and fade.
index	integer	Zero-based section index in the selected track. Default 0.

Returns: section, channels, keys, count, affected, message.

sequencer.list_float_keys (risk 0, smoke)

Lists the keys, default and extrapolation of a float property section.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
binding	string	Binding GUID or display name that owns the track. Empty selects a master track (fade, audio, camera cut, master event track).
property	string	Property path of property tracks (float, bool, enum, byte, integer), e.g. CustomTimeDilation. Ignored by transform, visibility, event and fade.
index	integer	Zero-based section index in the selected track. Default 0.

Returns: section, channels, keys, count, affected, message.

sequencer.list_folders (risk 0, smoke)

Lists every folder (depth-first) with path, color, bindings, root tracks and child folders.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.

Returns: folders, count, message.

sequencer.list_integer_keys (risk 0, smoke)

Lists the keys and default of an integer property section.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
binding	string	Binding GUID or display name that owns the track. Empty selects a master track (fade, audio, camera cut, master event track).
property	string	Property path of property tracks (float, bool, enum, byte, integer), e.g. CustomTimeDilation. Ignored by transform, visibility, event and fade.
index	integer	Zero-based section index in the selected track. Default 0.

Returns: section, channels, keys, count, affected, message.

sequencer.list_markers (risk 0, smoke)

Lists marked frames with label, time (seconds, tick frame, display frame), comment, color and fence flag.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.

Returns: markers, count, shownGlobally, locked, message.

sequencer.list_section_overlaps (risk 0, smoke)

Lists sections that overlap the selected section on its row.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
kind	string	required. Track kind: transform, audio, fade, camera_cut or cinematic_shot.
binding	string	Binding GUID or name for a bound track.
index	integer	Zero-based section index in the selected track. Default 0.

Returns: sections, count, message.

sequencer.list_sections (risk 0, smoke)

Lists default sections and their exclusive ranges in seconds.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
kind	string	required. Track kind: transform, audio, fade, camera_cut or cinematic_shot.
binding	string	Binding GUID or name for a bound track.
index	integer	Zero-based section index in the selected track. Default 0.

Returns: sections, count, message.

sequencer.list_sequence_actors (risk 0, requires world, smoke)

Lists the Level Sequence Actors of the editor level or of the PIE world with their sequence and settings.

Argument	Type	Description
world	string	editor (the edited level) or pie (the running PIE world). Default TEXT("editor").

Returns: world, actors, count.

sequencer.list_tracks (risk 0, smoke)

Lists all bound, root and camera-cut tracks with object name, kind, class, binding and section count.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.

Returns: tracks, count, message.

sequencer.list_transform_keys (risk 0, smoke)

Lists the ten channels (location.x/y/z, rotation.roll/pitch/yaw, scale.x/y/z, weight) and every key of a 3D transform section.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
binding	string	Binding GUID or display name that owns the track. Empty selects a master track (fade, audio, camera cut, master event track).
property	string	Property path of property tracks (float, bool, enum, byte, integer), e.g. CustomTimeDilation. Ignored by transform, visibility, event and fade.
index	integer	Zero-based section index in the selected track. Default 0.

Returns: section, channels, keys, count, affected, message.

sequencer.list_visibility_keys (risk 0, smoke)

Lists the keys of a visibility section (value true = hidden, the bHidden property).

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
binding	string	Binding GUID or display name that owns the track. Empty selects a master track (fade, audio, camera cut, master event track).
property	string	Property path of property tracks (float, bool, enum, byte, integer), e.g. CustomTimeDilation. Ignored by transform, visibility, event and fade.
index	integer	Zero-based section index in the selected track. Default 0.

Returns: section, channels, keys, count, affected, message.

sequencer.move_folder (risk 2, mutates, smoke)

Moves a folder under another folder, or to the root with an empty parent.

Argument	Type	Description
parent	string	New parent folder path; empty moves the folder to the root.

Returns: folders, count, message.

sequencer.move_section (risk 2, mutates, smoke)

Moves one section without changing its duration.

Argument	Type	Description
start	number	required. New inclusive start time in seconds.
row	integer	New zero-based row; negative retains source row. Default -1.

Returns: sections, count, message.

sequencer.move_to_folder (risk 2, mutates, smoke)

Files a binding or a root track into a folder (removing it from any other folder).

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
folder	string	Destination folder path (move_to_folder only).
binding	string	Binding GUID or name to move. Leave empty when track is set.
track	string	Root track object name (from list_tracks) to move. Leave empty when binding is set.

Returns: folders, count, message.

sequencer.move_track (risk 2, mutates, smoke)

Moves a bound track (with its sections) to another binding.

Argument	Type	Description
toBinding	string	required. Destination binding GUID or name (bound tracks move between bindings).

Returns: track, message.

sequencer.paste_keys (risk 2, mutates, smoke)

Pastes the key clipboard into a section of the same kind so the first copied key lands at time.

Argument	Type	Description
kind	string	required. Section kind; must equal the kind of the copied section.
time	number	Time in seconds where the first copied key lands. Default 0.0.
replace	boolean	Remove the target keys inside the pasted time span first. Default false.

Returns: section, channels, keys, count, affected, message.

sequencer.pause (risk 0, requires PIE)

Pauses playback at the current time in the PIE world.

Argument	Type	Description
actor	string	required. Label or object name of the Level Sequence Actor.

Returns: actor, sequence, playing, paused, time, frame, displayRate, duration, playRate, message.

sequencer.play (risk 0, requires PIE)

Starts (or resumes) playback of a Level Sequence Actor in the PIE world.

Argument	Type	Description
actor	string	required. Label or object name of the Level Sequence Actor.

Returns: actor, sequence, playing, paused, time, frame, displayRate, duration, playRate, message.

sequencer.reduce_fade_keys (risk 2, mutates, smoke)

Removes redundant fade keys within tolerance.

Argument	Type	Description
channel	string	Transform channel name; empty reduces all ten transform channels. Ignored by float and fade tools.
tolerance	number	Maximum value error allowed when a key is removed. Default 0.001.
autoSetInterpolation	boolean	Let the optimizer pick linear/constant interpolation for the remaining keys. Default false.

Returns: section, channels, keys, count, affected, message.

sequencer.reduce_float_keys (risk 2, mutates, smoke)

Removes redundant float property keys within tolerance.

Argument	Type	Description
channel	string	Transform channel name; empty reduces all ten transform channels. Ignored by float and fade tools.
tolerance	number	Maximum value error allowed when a key is removed. Default 0.001.
autoSetInterpolation	boolean	Let the optimizer pick linear/constant interpolation for the remaining keys. Default false.

Returns: section, channels, keys, count, affected, message.

sequencer.reduce_transform_keys (risk 2, mutates, smoke)

Removes redundant keys (within tolerance) from one or all transform channels.

Argument	Type	Description
channel	string	Transform channel name; empty reduces all ten transform channels. Ignored by float and fade tools.
tolerance	number	Maximum value error allowed when a key is removed. Default 0.001.
autoSetInterpolation	boolean	Let the optimizer pick linear/constant interpolation for the remaining keys. Default false.

Returns: section, channels, keys, count, affected, message.

sequencer.remove_attach_track (risk 3, mutates, destructive, smoke)

Removes the bound 3D attach (parent-to-actor constraint) track with its sections.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
binding	string	required. Binding GUID or display name.

Returns: track, existed, message.

sequencer.remove_audio_track (risk 3, mutates, destructive, smoke)

Removes the root or bound audio track with its sections.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
binding	string	Binding GUID or name; empty selects/creates the root track.

Returns: track, existed, message.

sequencer.remove_binding (risk 3, mutates, destructive, smoke)

Removes a binding and its attached tracks; child possessables become root bindings.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
binding	string	required. Binding GUID or display name.

Returns: bindings, count, message.

sequencer.remove_binding_tag (risk 2, mutates, smoke)

Removes one tag from a binding; the tag stays declared for other bindings.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
binding	string	required. Binding GUID or name.
tag	string	required. Tag name.

Returns: tags, count, message.

sequencer.remove_bool_key (risk 3, mutates, destructive, smoke)

Removes one bool property key.

Argument	Type	Description
key	integer	Key handle from a list/add reply (valid for the editor session until undo or reload). 0 selects the key at time instead. Default 0.
time	number	Time of the key in seconds, used when key is 0 (rounded to the sequence tick resolution). Default 0.0.

Returns: section, channels, keys, count, affected, message.

sequencer.remove_bool_track (risk 3, mutates, destructive, smoke)

Removes the bool property track of a binding with its sections.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
binding	string	required. Binding GUID or name.
propertyPath	string	Property path on the bound class, e.g. CustomTimeDilation or a struct member path. Required by add; get/remove accept it empty when the binding has exactly one track of that kind.

Returns: track, existed, message.

sequencer.remove_byte_key (risk 3, mutates, destructive, smoke)

Removes one byte property key.

Argument	Type	Description
key	integer	Key handle from a list/add reply (valid for the editor session until undo or reload). 0 selects the key at time instead. Default 0.
time	number	Time of the key in seconds, used when key is 0 (rounded to the sequence tick resolution). Default 0.0.

Returns: section, channels, keys, count, affected, message.

sequencer.remove_byte_track (risk 3, mutates, destructive, smoke)

Removes the byte property track of a binding with its sections.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
binding	string	required. Binding GUID or name.
propertyPath	string	Property path on the bound class, e.g. CustomTimeDilation or a struct member path. Required by add; get/remove accept it empty when the binding has exactly one track of that kind.

Returns: track, existed, message.

sequencer.remove_camera_cut_track (risk 3, mutates, destructive, smoke)

Removes the root camera cut (one per sequence) track with its sections.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.

Returns: track, existed, message.

sequencer.remove_camera_shake_track (risk 3, mutates, destructive, smoke)

Removes the bound camera shake track with its sections.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
binding	string	required. Binding GUID or display name.

Returns: track, existed, message.

sequencer.remove_color_track (risk 3, mutates, destructive, smoke)

Removes the color property track of a binding with its sections.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
binding	string	required. Binding GUID or name.
propertyPath	string	Property path on the bound class, e.g. CustomTimeDilation or a struct member path. Required by add; get/remove accept it empty when the binding has exactly one track of that kind.

Returns: track, existed, message.

sequencer.remove_enum_key (risk 3, mutates, destructive, smoke)

Removes one enum property key.

Argument	Type	Description
key	integer	Key handle from a list/add reply (valid for the editor session until undo or reload). 0 selects the key at time instead. Default 0.
time	number	Time of the key in seconds, used when key is 0 (rounded to the sequence tick resolution). Default 0.0.

Returns: section, channels, keys, count, affected, message.

sequencer.remove_enum_track (risk 3, mutates, destructive, smoke)

Removes the enum property track of a binding with its sections.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
binding	string	required. Binding GUID or name.
propertyPath	string	Property path on the bound class, e.g. CustomTimeDilation or a struct member path. Required by add; get/remove accept it empty when the binding has exactly one track of that kind.

Returns: track, existed, message.

sequencer.remove_event_key (risk 3, mutates, destructive, smoke)

Removes one trigger key of an event section.

Argument	Type	Description
key	integer	Key handle from a list/add reply (valid for the editor session until undo or reload). 0 selects the key at time instead. Default 0.
time	number	Time of the key in seconds, used when key is 0 (rounded to the sequence tick resolution). Default 0.0.

Returns: section, channels, keys, count, affected, message.

sequencer.remove_event_track (risk 3, mutates, destructive, smoke)

Removes the root or bound event track with its sections.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
binding	string	Binding GUID or name; empty selects/creates the root track.

Returns: track, existed, message.

sequencer.remove_fade_key (risk 3, mutates, destructive, smoke)

Removes one fade key.

Argument	Type	Description
key	integer	Key handle from a list/add reply (valid for the editor session until undo or reload). 0 selects the key at time instead. Default 0.
time	number	Time of the key in seconds, used when key is 0 (rounded to the sequence tick resolution). Default 0.0.

Returns: section, channels, keys, count, affected, message.

sequencer.remove_fade_track (risk 3, mutates, destructive, smoke)

Removes the root fade track with its sections.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.

Returns: track, existed, message.

sequencer.remove_float_key (risk 3, mutates, destructive, smoke)

Removes one float property key.

Argument	Type	Description
key	integer	Key handle from a list/add reply (valid for the editor session until undo or reload). 0 selects the key at time instead. Default 0.
time	number	Time of the key in seconds, used when key is 0 (rounded to the sequence tick resolution). Default 0.0.

Returns: section, channels, keys, count, affected, message.

sequencer.remove_float_track (risk 3, mutates, destructive, smoke)

Removes the float property track of a binding with its sections.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
binding	string	required. Binding GUID or name.
propertyPath	string	Property path on the bound class, e.g. CustomTimeDilation or a struct member path. Required by add; get/remove accept it empty when the binding has exactly one track of that kind.

Returns: track, existed, message.

sequencer.remove_folder (risk 3, mutates, destructive, smoke)

Removes a folder; its bindings, tracks and sub-folders move to the parent folder (or root). Nothing is deleted.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
folder	string	required. Folder path such as Cameras or Cameras/Shots.

Returns: folders, count, message.

sequencer.remove_from_folder (risk 2, mutates, smoke)

Takes a binding or a root track out of its folder (back to the root of the tree).

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
folder	string	Destination folder path (move_to_folder only).
binding	string	Binding GUID or name to move. Leave empty when track is set.
track	string	Root track object name (from list_tracks) to move. Leave empty when binding is set.

Returns: folders, count, message.

sequencer.remove_integer_key (risk 3, mutates, destructive, smoke)

Removes one integer property key.

Argument	Type	Description
key	integer	Key handle from a list/add reply (valid for the editor session until undo or reload). 0 selects the key at time instead. Default 0.
time	number	Time of the key in seconds, used when key is 0 (rounded to the sequence tick resolution). Default 0.0.

Returns: section, channels, keys, count, affected, message.

sequencer.remove_integer_track (risk 3, mutates, destructive, smoke)

Removes the integer property track of a binding with its sections.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
binding	string	required. Binding GUID or name.
propertyPath	string	Property path on the bound class, e.g. CustomTimeDilation or a struct member path. Required by add; get/remove accept it empty when the binding has exactly one track of that kind.

Returns: track, existed, message.

sequencer.remove_level_visibility_track (risk 3, mutates, destructive, smoke)

Removes the root level visibility (streaming level show/hide) track with its sections.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.

Returns: track, existed, message.

sequencer.remove_marker (risk 3, mutates, destructive, smoke)

Removes one marker by label.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
label	string	required. Marker label.

Returns: markers, count, shownGlobally, locked, message.

sequencer.remove_path_track (risk 3, mutates, destructive, smoke)

Removes the bound 3D path (follow a spline) track with its sections.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
binding	string	required. Binding GUID or display name.

Returns: track, existed, message.

sequencer.remove_play_rate_track (risk 3, mutates, destructive, smoke)

Removes the root play rate (time dilation) track with its sections.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.

Returns: track, existed, message.

sequencer.remove_section (risk 3, mutates, destructive, smoke)

Removes one section from the selected track.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
kind	string	required. Track kind: transform, audio, fade, camera_cut or cinematic_shot.
binding	string	Binding GUID or name for a bound track.
index	integer	Zero-based section index in the selected track. Default 0.

Returns: sections, count, message.

sequencer.remove_sequence_actor (risk 3, mutates, destructive, requires world, smoke)

Deletes a Level Sequence Actor from the editor level.

Argument	Type	Description
actor	string	required. Label or object name of the Level Sequence Actor.

Returns: actor, changedActors, message.

sequencer.remove_shot_track (risk 3, mutates, destructive, smoke)

Removes the root cinematic shot track with its sections.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.

Returns: track, existed, message.

sequencer.remove_skeletal_animation_track (risk 3, mutates, destructive, smoke)

Removes the bound skeletal animation track with its sections.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
binding	string	required. Binding GUID or display name.

Returns: track, existed, message.

sequencer.remove_spawn_track (risk 3, mutates, destructive, smoke)

Removes the bound spawn (controls when a spawnable exists; spawnables only) track with its sections.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
binding	string	required. Binding GUID or display name.

Returns: track, existed, message.

sequencer.remove_sub_track (risk 3, mutates, destructive, smoke)

Removes the root subsequence track with its sections.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.

Returns: track, existed, message.

sequencer.remove_track (risk 3, mutates, destructive, smoke)

Removes the selected bound, root or camera-cut track (by kind and optional binding).

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
kind	string	required. Track kind: transform, audio, fade, camera_cut or cinematic_shot.
binding	string	Binding GUID or name for transform tracks. Empty creates a master track.

Returns: tracks, count, message.

sequencer.remove_transform_key (risk 3, mutates, destructive, smoke)

Removes the keys of every transform channel at one time.

Argument	Type	Description
time	number	required. Time in seconds (rounded to the sequence tick resolution).

Returns: section, channels, keys, count, affected, message.

sequencer.remove_transform_track (risk 3, mutates, destructive, smoke)

Removes the bound 3D transform track with its sections.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
binding	string	required. Binding GUID or display name.

Returns: track, existed, message.

sequencer.remove_vector_track (risk 3, mutates, destructive, smoke)

Removes the vector property track of a binding with its sections.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
binding	string	required. Binding GUID or name.
propertyPath	string	Property path on the bound class, e.g. CustomTimeDilation or a struct member path. Required by add; get/remove accept it empty when the binding has exactly one track of that kind.

Returns: track, existed, message.

sequencer.remove_visibility_key (risk 3, mutates, destructive, smoke)

Removes one visibility key.

Argument	Type	Description
key	integer	Key handle from a list/add reply (valid for the editor session until undo or reload). 0 selects the key at time instead. Default 0.
time	number	Time of the key in seconds, used when key is 0 (rounded to the sequence tick resolution). Default 0.0.

Returns: section, channels, keys, count, affected, message.

sequencer.remove_visibility_track (risk 3, mutates, destructive, smoke)

Removes the bound visibility (bHidden on actors, bHiddenInGame on components) track with its sections.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
binding	string	required. Binding GUID or display name.

Returns: track, existed, message.

sequencer.rename_binding (risk 2, mutates, smoke)

Renames a possessable or spawnable binding.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
binding	string	required. Binding GUID or display name.
name	string	required. New display name.

Returns: bindings, count, message.

sequencer.rename_folder (risk 2, mutates, smoke)

Renames a folder.

Argument	Type	Description
name	string	required. New folder name (no slashes).

Returns: folders, count, message.

sequencer.replace_spawnable_template (risk 2, mutates, smoke)

Replaces a spawnable's object template from an actor class/Blueprint/StaticMesh or from a level actor's current state.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
binding	string	required. Spawnable GUID or name.
template	string	Template source: an actor class name/path, an actor Blueprint, or a StaticMesh asset. Leave empty when actor is set.
actor	string	Level actor label/name whose current state becomes the template. Leave empty when template is set.

Returns: binding, changedActors, message.

sequencer.set_actor_sequence (risk 2, mutates, requires world, smoke)

Assigns another Level Sequence to a Level Sequence Actor of the editor level.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.

Returns: actor, changedActors, message.

sequencer.set_audio_section_sound (risk 2, mutates, smoke)

Replaces the sound of an audio section and sets its start offset.

Argument	Type	Description
sound	string	required. Sound asset path.
startOffset	number	Offset into the sound in seconds where playback starts. Default 0.0.

Returns: section, details, trackCreated, message.

sequencer.set_binding_override (risk 2, mutates, requires world, smoke)

Makes a sequence binding animate the given editor-level actors instead of (or besides) the asset's own binding.

Argument	Type	Description
binding	string	required. Binding GUID or display name in the actor's sequence.
targets	array of string	Labels or object names of the editor-level actors to bind.
allowBindingsFromAsset	boolean	Keep the objects bound in the asset in addition to the targets. Default false.
reset	boolean	Remove the override of this binding instead of setting it. Default false.

Returns: actor, changedActors, message.

sequencer.set_binding_parent (risk 2, mutates, smoke)

Re-parents a possessable under another binding, or makes it a root binding with an empty parent.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
binding	string	required. Possessable GUID or name to re-parent.
parent	string	New parent binding GUID or name. Empty makes the possessable a root binding.

Returns: binding, changedActors, message.

sequencer.set_binding_tags (risk 2, mutates, smoke)

Replaces the complete tag set of one binding.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
binding	string	required. Binding GUID or name.
tags	array of string	Complete list of tags the binding must carry afterwards. An empty list removes every tag from it.

Returns: tags, count, message.

sequencer.set_bool_channel_default (risk 2, mutates, smoke)

Sets or clears the default value of a bool property section.

Argument	Type	Description
value	boolean	Default value used when the channel has no keys. Default false.
clear	boolean	Remove the default instead of setting it. Default false.

Returns: section, channels, keys, count, affected, message.

sequencer.set_bool_key (risk 2, mutates, smoke)

Changes the value and/or time of one bool property key.

Argument	Type	Description
value	boolean	required. New key value.
move	boolean	Also move the key to newTime. Default false.
newTime	number	Destination time in seconds when move is true. Default 0.0.

Returns: section, channels, keys, count, affected, message.

sequencer.set_bool_track (risk 2, mutates, smoke)

Re-targets the bool property track to another bool property.

Argument	Type	Description
newPropertyPath	string	required. New property path; its type must match the track kind.

Returns: track, existed, message.

sequencer.set_byte_channel_default (risk 2, mutates, smoke)

Sets or clears the default value of a byte property section.

Argument	Type	Description
value	integer	Default value used when the channel has no keys (byte channels accept 0-255). Default 0.
clear	boolean	Remove the default instead of setting it. Default false.

Returns: section, channels, keys, count, affected, message.

sequencer.set_byte_key (risk 2, mutates, smoke)

Changes the value and/or time of one byte property key.

Argument	Type	Description
value	integer	required. New key value (byte channels accept 0-255).
move	boolean	Also move the key to newTime. Default false.
newTime	number	Destination time in seconds when move is true. Default 0.0.

Returns: section, channels, keys, count, affected, message.

sequencer.set_byte_track (risk 2, mutates, smoke)

Re-targets the byte property track to another uint8 / TEnumAsByte property.

Argument	Type	Description
newPropertyPath	string	required. New property path; its type must match the track kind.

Returns: track, existed, message.

sequencer.set_camera_cut_section_camera (risk 2, mutates, smoke)

Points a camera cut at another camera binding.

Argument	Type	Description
cameraBinding	string	required. Binding GUID or display name of the camera.

Returns: section, details, trackCreated, message.

sequencer.set_camera_cut_track (risk 2, mutates, smoke)

Sets whether overlapping camera cut sections blend.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
canBlend	boolean	Allow blending between overlapping camera cut sections. Default false.

Returns: track, existed, message.

sequencer.set_color_track (risk 2, mutates, smoke)

Re-targets the color property track to another FLinearColor or FColor property.

Argument	Type	Description
newPropertyPath	string	required. New property path; its type must match the track kind.

Returns: track, existed, message.

sequencer.set_enum_channel_default (risk 2, mutates, smoke)

Sets or clears the default entry of an enum property section.

Argument	Type	Description
value	string	Default enum entry name (required unless clear is true).
clear	boolean	Remove the default instead of setting it. Default false.

Returns: section, channels, keys, count, affected, message.

sequencer.set_enum_key (risk 2, mutates, smoke)

Changes the entry and/or time of one enum property key.

Argument	Type	Description
value	string	required. New enum entry name.
move	boolean	Also move the key to newTime. Default false.
newTime	number	Destination time in seconds when move is true. Default 0.0.

Returns: section, channels, keys, count, affected, message.

sequencer.set_enum_track (risk 2, mutates, smoke)

Re-targets the enum property track to another enum-class property.

Argument	Type	Description
newPropertyPath	string	required. New property path; its type must match the track kind.

Returns: track, existed, message.

sequencer.set_evaluation_type (risk 2, mutates, smoke)

Sets frame-locked or sub-frame evaluation for a Level Sequence.

Argument	Type	Description
type	string	Evaluation type: with_sub_frames or frame_locked. Default TEXT("with_sub_frames").
readOnly	boolean	Read-only authoring state. Default false.
playbackRangeLocked	boolean	Locks or unlocks the playback range. Default false.

Returns: timeline, message.

sequencer.set_event_key (risk 2, mutates, smoke)

Moves one trigger key of an event section to newTime.

Argument	Type	Description
newTime	number	required. Destination time in seconds.

Returns: section, channels, keys, count, affected, message.

sequencer.set_event_track (risk 2, mutates, smoke)

Sets when an event track fires: forwards/backwards playback and the evaluation position.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
binding	string	Binding GUID or name; empty selects the root event track.
fireEventsWhenForwards	boolean	Fire events when playing forwards. Default true.
fireEventsWhenBackwards	boolean	Fire events when playing backwards. Default true.
eventPosition	string	at_start_of_evaluation, at_end_of_evaluation or after_spawn. Default TEXT("at_end_of_evaluation").

Returns: track, existed, message.

sequencer.set_fade_channel_default (risk 2, mutates, smoke)

Sets or clears the default fade amount.

Argument	Type	Description
value	number	Default value used when the channel has no keys. Default 0.0.
clear	boolean	Remove the default instead of setting it. Default false.

Returns: section, channels, keys, count, affected, message.

sequencer.set_fade_extrapolation (risk 2, mutates, smoke)

Sets pre/post-infinity extrapolation of a fade section.

Argument	Type	Description
channel	string	Transform channel name; empty applies to all ten transform channels. Ignored by float and fade tools.
preInfinity	string	Before the first key: constant, linear, cycle, cycle_with_offset or oscillate. Default TEXT("constant").
postInfinity	string	After the last key: constant, linear, cycle, cycle_with_offset or oscillate. Default TEXT("constant").

Returns: section, channels, keys, count, affected, message.

sequencer.set_fade_key (risk 2, mutates, smoke)

Changes the value, interpolation and/or time of one fade key.

Argument	Type	Description
value	number	required. New key value.
move	boolean	Also move the key to newTime. Default false.
newTime	number	Destination time in seconds when move is true. Default 0.0.
interpolation	string	New interpolation (cubic, linear, constant, user, break); empty keeps the current one.

Returns: section, channels, keys, count, affected, message.

sequencer.set_fade_key_interpolation (risk 2, mutates, smoke)

Sets the interpolation of one fade key.

Argument	Type	Description
channel	string	Transform channel (location.x/y/z, rotation.roll/pitch/yaw, scale.x/y/z, weight); required by transform tools, ignored otherwise.
interpolation	string	required. Interpolation: cubic (auto tangents), linear, constant, user or break.

Returns: section, channels, keys, count, affected, message.

sequencer.set_fade_key_tangent (risk 2, mutates, smoke)

Sets explicit tangents on one fade key.

Argument	Type	Description
channel	string	Transform channel (location.x/y/z, rotation.roll/pitch/yaw, scale.x/y/z, weight); required by transform tools, ignored otherwise.
arriveTangent	number	Arrive tangent (value units per tick-resolution frame, as stored by Sequencer). Default 0.0.
leaveTangent	number	Leave tangent. A value different from arriveTangent sets the broken tangent mode. Default 0.0.
arriveTangentWeight	number	Arrive tangent weight (used when weightMode is arrive or both). Default 0.0.
leaveTangentWeight	number	Leave tangent weight (used when weightMode is leave or both). Default 0.0.
weightMode	string	Tangent weight mode: none, arrive, leave or both. Default TEXT("none").

Returns: section, channels, keys, count, affected, message.

sequencer.set_fade_section_color (risk 2, mutates, smoke)

Sets the color faded to and whether audio fades with it.

Argument	Type	Description
color	UeaSequencerColor	Fade color.
fadeAudio	boolean	Also fade the audio volume. Default false.

Returns: section, details, trackCreated, message.

sequencer.set_float_channel_default (risk 2, mutates, smoke)

Sets or clears the default value of a float property section.

Argument	Type	Description
value	number	Default value used when the channel has no keys. Default 0.0.
clear	boolean	Remove the default instead of setting it. Default false.

Returns: section, channels, keys, count, affected, message.

sequencer.set_float_extrapolation (risk 2, mutates, smoke)

Sets pre/post-infinity extrapolation of a float property section.

Argument	Type	Description
channel	string	Transform channel name; empty applies to all ten transform channels. Ignored by float and fade tools.
preInfinity	string	Before the first key: constant, linear, cycle, cycle_with_offset or oscillate. Default TEXT("constant").
postInfinity	string	After the last key: constant, linear, cycle, cycle_with_offset or oscillate. Default TEXT("constant").

Returns: section, channels, keys, count, affected, message.

sequencer.set_float_key (risk 2, mutates, smoke)

Changes the value, interpolation and/or time of one float property key.

Argument	Type	Description
value	number	required. New key value.
move	boolean	Also move the key to newTime. Default false.
newTime	number	Destination time in seconds when move is true. Default 0.0.
interpolation	string	New interpolation (cubic, linear, constant, user, break); empty keeps the current one.

Returns: section, channels, keys, count, affected, message.

sequencer.set_float_key_interpolation (risk 2, mutates, smoke)

Sets the interpolation of one float property key.

Argument	Type	Description
channel	string	Transform channel (location.x/y/z, rotation.roll/pitch/yaw, scale.x/y/z, weight); required by transform tools, ignored otherwise.
interpolation	string	required. Interpolation: cubic (auto tangents), linear, constant, user or break.

Returns: section, channels, keys, count, affected, message.

sequencer.set_float_key_tangent (risk 2, mutates, smoke)

Sets explicit tangents on one float property key.

Argument	Type	Description
channel	string	Transform channel (location.x/y/z, rotation.roll/pitch/yaw, scale.x/y/z, weight); required by transform tools, ignored otherwise.
arriveTangent	number	Arrive tangent (value units per tick-resolution frame, as stored by Sequencer). Default 0.0.
leaveTangent	number	Leave tangent. A value different from arriveTangent sets the broken tangent mode. Default 0.0.
arriveTangentWeight	number	Arrive tangent weight (used when weightMode is arrive or both). Default 0.0.
leaveTangentWeight	number	Leave tangent weight (used when weightMode is leave or both). Default 0.0.
weightMode	string	Tangent weight mode: none, arrive, leave or both. Default TEXT("none").

Returns: section, channels, keys, count, affected, message.

sequencer.set_float_track (risk 2, mutates, smoke)

Re-targets the float property track to another float property.

Argument	Type	Description
newPropertyPath	string	required. New property path; its type must match the track kind.

Returns: track, existed, message.

sequencer.set_folder_color (risk 2, mutates, smoke)

Sets a folder color.

Argument	Type	Description
color	UeaSequencerTrackColor	Folder color (linear 0..1).

Returns: folders, count, message.

sequencer.set_integer_channel_default (risk 2, mutates, smoke)

Sets or clears the default value of an integer property section.

Argument	Type	Description
value	integer	Default value used when the channel has no keys (byte channels accept 0-255). Default 0.
clear	boolean	Remove the default instead of setting it. Default false.

Returns: section, channels, keys, count, affected, message.

sequencer.set_integer_key (risk 2, mutates, smoke)

Changes the value and/or time of one integer property key.

Argument	Type	Description
value	integer	required. New key value (byte channels accept 0-255).
move	boolean	Also move the key to newTime. Default false.
newTime	number	Destination time in seconds when move is true. Default 0.0.

Returns: section, channels, keys, count, affected, message.

sequencer.set_integer_track (risk 2, mutates, smoke)

Re-targets the integer property track to another int32 property.

Argument	Type	Description
newPropertyPath	string	required. New property path; its type must match the track kind.

Returns: track, existed, message.

sequencer.set_marker (risk 2, mutates, smoke)

Replaces time, label, comment, color and fence flag of a marker selected by label.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
label	string	required. Label of the marker to edit.
time	number	required. New marker time in seconds.
newLabel	string	New label; empty keeps the current one.
comment	string	New comment (UE 5.2+).
customColor	boolean	True applies color; false restores the default marker color. Default false.
color	UeaSequencerTrackColor	Marker color (linear 0..1).
determinismFence	boolean	Determinism fence flag. Default false.

Returns: markers, count, shownGlobally, locked, message.

sequencer.set_markers_locked (risk 2, mutates, UE 5.3+, smoke)

Locks or unlocks marked frames against editing in the Sequencer UI.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
enabled	boolean	New flag value. Default true.

Returns: markers, count, shownGlobally, locked, message.

sequencer.set_markers_shown_globally (risk 2, mutates, smoke)

Shows or hides this sequence's markers in every sequence that contains it.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
enabled	boolean	New flag value. Default true.

Returns: markers, count, shownGlobally, locked, message.

sequencer.set_playback_range_locked (risk 2, mutates, UE 5.3+, smoke)

Locks or unlocks the Level Sequence playback range.

Argument	Type	Description
type	string	Evaluation type: with_sub_frames or frame_locked. Default TEXT("with_sub_frames").
readOnly	boolean	Read-only authoring state. Default false.
playbackRangeLocked	boolean	Locks or unlocks the playback range. Default false.

Returns: timeline, message.

sequencer.set_possessable_class (risk 2, mutates, smoke)

Changes the declared class of a possessable (used by the editor to filter tracks).

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
binding	string	required. Possessable GUID or name.
class	string	required. Class path or short class name, e.g. Actor, CineCameraActor, StaticMeshComponent.

Returns: binding, changedActors, message.

sequencer.set_range (risk 2, mutates, smoke)

Sets an exclusive playback range in seconds.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
start	number	Inclusive start time in seconds. Default 0.0.
end	number	required. Exclusive end time in seconds.

Returns: sequence, message.

sequencer.set_rates (risk 2, mutates, smoke)

Sets the editor display and optional tick rates in frames per second.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
displayRate	number	Editor display rate in frames per second. Default 30.0.
tickResolution	number	Internal tick resolution in frames per second. Zero preserves the current resolution. Default 0.0.

Returns: sequence, message.

sequencer.set_read_only (risk 2, mutates, smoke)

Sets the asset read-only authoring state.

Argument	Type	Description
type	string	Evaluation type: with_sub_frames or frame_locked. Default TEXT("with_sub_frames").
readOnly	boolean	Read-only authoring state. Default false.
playbackRangeLocked	boolean	Locks or unlocks the playback range. Default false.

Returns: timeline, message.

sequencer.set_section_active (risk 2, mutates, smoke)

Enables or disables one section without deleting its keys or range.

Argument	Type	Description
active	boolean	Whether the section participates in evaluation. Default true.
locked	boolean	Whether the section is locked against timeline edits. Default false.
row	integer	Row used for overlapping sections. Default 0.
overlapPriority	integer	Higher priorities win overlaps on the same row. Default 0.
preRollFrames	integer	Pre-roll duration in frames at the sequence tick resolution. Default 0.
postRollFrames	integer	Post-roll duration in frames at the sequence tick resolution. Default 0.

Returns: section, message.

sequencer.set_section_blend_type (risk 2, mutates, smoke)

Sets a blend type supported by the selected section class.

Argument	Type	Description
blendType	string	required. Blend type: absolute, additive, relative, or additive_from_base.

Returns: section, message.

sequencer.set_section_completion_mode (risk 2, mutates, smoke)

Sets the evaluation completion behavior for a section.

Argument	Type	Description
completionMode	string	required. Completion mode: keep_state, restore_state, or project_default.

Returns: section, message.

sequencer.set_section_ease (risk 2, mutates, smoke)

Sets manual ease-in/out durations in seconds (negative restores automatic easing from overlaps).

Argument	Type	Description
easeIn	number	Manual ease-in duration in seconds; negative restores automatic easing from overlaps. Default 0.0.
easeOut	number	Manual ease-out duration in seconds; negative restores automatic easing from overlaps. Default 0.0.

Returns: section, details, trackCreated, message.

sequencer.set_section_locked (risk 2, mutates, smoke)

Locks or unlocks one section for editor timeline edits.

Argument	Type	Description
active	boolean	Whether the section participates in evaluation. Default true.
locked	boolean	Whether the section is locked against timeline edits. Default false.
row	integer	Row used for overlapping sections. Default 0.
overlapPriority	integer	Higher priorities win overlaps on the same row. Default 0.
preRollFrames	integer	Pre-roll duration in frames at the sequence tick resolution. Default 0.
postRollFrames	integer	Post-roll duration in frames at the sequence tick resolution. Default 0.

Returns: section, message.

sequencer.set_section_overlap_priority (risk 2, mutates, smoke)

Sets priority used to resolve overlapping sections on one row.

Argument	Type	Description
active	boolean	Whether the section participates in evaluation. Default true.
locked	boolean	Whether the section is locked against timeline edits. Default false.
row	integer	Row used for overlapping sections. Default 0.
overlapPriority	integer	Higher priorities win overlaps on the same row. Default 0.
preRollFrames	integer	Pre-roll duration in frames at the sequence tick resolution. Default 0.
postRollFrames	integer	Post-roll duration in frames at the sequence tick resolution. Default 0.

Returns: section, message.

sequencer.set_section_post_roll (risk 2, mutates, smoke)

Sets post-roll continuation frames for one section.

Argument	Type	Description
active	boolean	Whether the section participates in evaluation. Default true.
locked	boolean	Whether the section is locked against timeline edits. Default false.
row	integer	Row used for overlapping sections. Default 0.
overlapPriority	integer	Higher priorities win overlaps on the same row. Default 0.
preRollFrames	integer	Pre-roll duration in frames at the sequence tick resolution. Default 0.
postRollFrames	integer	Post-roll duration in frames at the sequence tick resolution. Default 0.

Returns: section, message.

sequencer.set_section_pre_roll (risk 2, mutates, smoke)

Sets pre-roll preparation frames for one section.

Argument	Type	Description
active	boolean	Whether the section participates in evaluation. Default true.
locked	boolean	Whether the section is locked against timeline edits. Default false.
row	integer	Row used for overlapping sections. Default 0.
overlapPriority	integer	Higher priorities win overlaps on the same row. Default 0.
preRollFrames	integer	Pre-roll duration in frames at the sequence tick resolution. Default 0.
postRollFrames	integer	Post-roll duration in frames at the sequence tick resolution. Default 0.

Returns: section, message.

sequencer.set_section_range (risk 2, mutates, smoke)

Sets a selected section's exclusive time range in seconds.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
kind	string	required. Track kind: transform, audio, fade, camera_cut or cinematic_shot.
binding	string	Binding GUID or name for a bound track.
index	integer	Zero-based section index in the selected track. Default 0.
start	number	Inclusive start time in seconds. Default 0.0.
end	number	required. Exclusive end time in seconds.

Returns: sections, count, message.

sequencer.set_section_row (risk 2, mutates, smoke)

Moves a section to an explicit non-negative overlap row.

Argument	Type	Description
active	boolean	Whether the section participates in evaluation. Default true.
locked	boolean	Whether the section is locked against timeline edits. Default false.
row	integer	Row used for overlapping sections. Default 0.
overlapPriority	integer	Higher priorities win overlaps on the same row. Default 0.
preRollFrames	integer	Pre-roll duration in frames at the sequence tick resolution. Default 0.
postRollFrames	integer	Post-roll duration in frames at the sequence tick resolution. Default 0.

Returns: section, message.

sequencer.set_sequence_actor_playback (risk 2, mutates, requires world, smoke)

Sets auto-play, loop count, play rate and pause-at-end of a Level Sequence Actor of the editor level.

Argument	Type	Description
autoPlay	boolean	Start playing automatically on BeginPlay. Default false.
loopCount	integer	Extra loops after the first play; -1 loops forever. Default 0.
playRate	number	Playback rate multiplier (> 0). Default 1.0.
pauseAtEnd	boolean	Hold the last frame instead of finishing. Default false.

Returns: actor, changedActors, message.

sequencer.set_skeletal_animation_section (risk 2, mutates)

Edits animation, slot, start/end offsets and reverse playback of a skeletal animation section.

Argument	Type	Description
animation	string	Animation asset path; empty keeps the current animation.
slotName	string	Slot name used when the animation plays through a montage slot; empty keeps the current slot.
startOffset	number	Offset into the animation in seconds at the section start. Default 0.0.
endOffset	number	Seconds trimmed from the end of the animation. Default 0.0.
reverse	boolean	Play the animation backwards. Default false.

Returns: section, details, trackCreated, message.

sequencer.set_skeletal_animation_track (risk 2, mutates, smoke)

Sets legacy section-index blending, first-child-of-root blending and the root motion trail of a skeletal animation track.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
binding	string	required. Binding GUID or name of a skeletal mesh actor or component.
useLegacySectionIndexBlend	boolean	Blend sections by row index as in UE 4.19 and earlier. Default false.
blendFirstChildOfRoot	boolean	Blend and match the first child of the root bone instead of the root (for static-root animations). Default false.
showRootMotionTrail	boolean	Draw the root motion trail in the editor viewport. Default false.

Returns: track, existed, message.

sequencer.set_spawnable_level (risk 2, mutates, smoke)

Sets the streaming level a spawnable spawns into (empty = persistent level).

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
binding	string	required. Spawnable GUID or name.
level	string	Level name to spawn into. Empty spawns into the persistent level.

Returns: binding, changedActors, message.

sequencer.set_spawnable_net_addressable (risk 2, mutates, smoke)

Sets whether a spawnable gets a deterministic net-addressable name (needed for replicated spawnables).

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
binding	string	required. Spawnable GUID or name.
enabled	boolean	New flag value. Default true.

Returns: binding, changedActors, message.

sequencer.set_spawnable_ownership (risk 2, mutates, smoke)

Sets who owns (destroys) a spawned object: inner_sequence, root_sequence or external.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
binding	string	required. Spawnable GUID or name.
ownership	string	required. inner_sequence (destroyed when its sequence ends), root_sequence (when the root sequence ends) or external (never destroyed by the sequence).

Returns: binding, changedActors, message.

sequencer.set_spawnable_respawn (risk 2, mutates, smoke)

Sets whether a spawnable is respawned when something destroys it during playback.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
binding	string	required. Spawnable GUID or name.
enabled	boolean	New flag value. Default true.

Returns: binding, changedActors, message.

sequencer.set_track_color (risk 2, mutates, smoke)

Sets the tint color of a track in the Sequencer tree.

Argument	Type	Description
color	UeaSequencerTrackColor	Track tint (linear 0..1).

Returns: track, message.

sequencer.set_track_display_name (risk 2, mutates, smoke)

Sets the display name of a nameable track (empty restores the default).

Argument	Type	Description
displayName	string	New display name shown in the Sequencer tree. Empty restores the default name.

Returns: track, message.

sequencer.set_track_locked (risk 2, mutates, smoke)

Locks or unlocks every section of a track against timeline edits.

Argument	Type	Description
locked	boolean	True locks every section of the track against timeline edits (Sequencer "Lock"). Default true.

Returns: track, message.

sequencer.set_track_muted (risk 2, mutates, smoke)

Mutes or unmutes a whole track (disables its evaluation without deleting it).

Argument	Type	Description
muted	boolean	True disables evaluation of the track (Sequencer "Mute"). Default true.

Returns: track, message.

sequencer.set_track_row_muted (risk 2, mutates, smoke)

Mutes or unmutes one section row of a track.

Argument	Type	Description
row	integer	Zero-based section row. Default 0.
muted	boolean	True disables evaluation of that row only. Default true.

Returns: track, message.

sequencer.set_track_sorting_order (risk 2, mutates, smoke)

Sets the sorting order of a track in the Sequencer tree.

Argument	Type	Description
sortingOrder	integer	Sorting order in the Sequencer tree; higher values are listed further down. Default 0.

Returns: track, message.

sequencer.set_transform_channel_default (risk 2, mutates, smoke)

Sets or clears the default (unkeyed) values of the location, rotation and/or scale channels.

Argument	Type	Description
location	{x,y,z}	Default location in centimeters.
rotation	{x,y,z}	Default rotation in degrees as {x: pitch, y: yaw, z: roll}.
scale	{x,y,z}	Default scale. Default FUeaVec3(1.0, 1.0, 1.0).
keyLocation	boolean	Apply to the location channels. Default true.
keyRotation	boolean	Apply to the rotation channels. Default true.
keyScale	boolean	Apply to the scale channels. Default true.
clear	boolean	Remove the defaults of the selected channels instead of setting them. Default false.

Returns: section, channels, keys, count, affected, message.

sequencer.set_transform_extrapolation (risk 2, mutates, smoke)

Sets pre/post-infinity extrapolation of one transform channel, or of all ten when channel is empty.

Argument	Type	Description
channel	string	Transform channel name; empty applies to all ten transform channels. Ignored by float and fade tools.
preInfinity	string	Before the first key: constant, linear, cycle, cycle_with_offset or oscillate. Default TEXT("constant").
postInfinity	string	After the last key: constant, linear, cycle, cycle_with_offset or oscillate. Default TEXT("constant").

Returns: section, channels, keys, count, affected, message.

sequencer.set_transform_key (risk 2, mutates, smoke)

Rewrites the enabled components of the transform keys at time and optionally moves every channel key at that frame to newTime.

Argument	Type	Description
move	boolean	Also move the keys at time to newTime. Default false.
newTime	number	Destination time in seconds when move is true. Default 0.0.

Returns: section, channels, keys, count, affected, message.

sequencer.set_transform_key_interpolation (risk 2, mutates, smoke)

Sets the interpolation of one key of one transform channel (channel required).

Argument	Type	Description
channel	string	Transform channel (location.x/y/z, rotation.roll/pitch/yaw, scale.x/y/z, weight); required by transform tools, ignored otherwise.
interpolation	string	required. Interpolation: cubic (auto tangents), linear, constant, user or break.

Returns: section, channels, keys, count, affected, message.

sequencer.set_transform_key_tangent (risk 2, mutates, smoke)

Sets explicit arrive/leave tangents (user or broken) on one key of one transform channel.

Argument	Type	Description
channel	string	Transform channel (location.x/y/z, rotation.roll/pitch/yaw, scale.x/y/z, weight); required by transform tools, ignored otherwise.
arriveTangent	number	Arrive tangent (value units per tick-resolution frame, as stored by Sequencer). Default 0.0.
leaveTangent	number	Leave tangent. A value different from arriveTangent sets the broken tangent mode. Default 0.0.
arriveTangentWeight	number	Arrive tangent weight (used when weightMode is arrive or both). Default 0.0.
leaveTangentWeight	number	Leave tangent weight (used when weightMode is leave or both). Default 0.0.
weightMode	string	Tangent weight mode: none, arrive, leave or both. Default TEXT("none").

Returns: section, channels, keys, count, affected, message.

sequencer.set_transform_section_mask (risk 2, mutates, smoke)

Selects which channel groups of a 3D transform section are animated (location, rotation, scale, weight).

Argument	Type	Description
location	boolean	Animate location. Default true.
rotation	boolean	Animate rotation. Default true.
scale	boolean	Animate scale. Default true.
weight	boolean	Expose the manual weight channel. Default false.

Returns: section, details, trackCreated, message.

sequencer.set_vector_track (risk 2, mutates, smoke)

Re-targets the vector property track to another FVector, FVector2D or FVector4 property (double-precision vector track on UE5).

Argument	Type	Description
newPropertyPath	string	required. New property path; its type must match the track kind.

Returns: track, existed, message.

sequencer.set_view_range (risk 2, mutates, UE 5.3+, smoke)

Sets the editor-only visible timeline range in seconds.

Argument	Type	Description
start	number	Inclusive timeline start in seconds. Default 0.0.
end	number	Exclusive timeline end in seconds. Default 5.0.

Returns: timeline, message.

sequencer.set_visibility_channel_default (risk 2, mutates, smoke)

Sets or clears the default of a visibility section (true = hidden).

Argument	Type	Description
value	boolean	Default value used when the channel has no keys. Default false.
clear	boolean	Remove the default instead of setting it. Default false.

Returns: section, channels, keys, count, affected, message.

sequencer.set_visibility_key (risk 2, mutates, smoke)

Changes the value and/or time of one visibility key.

Argument	Type	Description
value	boolean	required. New key value.
move	boolean	Also move the key to newTime. Default false.
newTime	number	Destination time in seconds when move is true. Default 0.0.

Returns: section, channels, keys, count, affected, message.

sequencer.set_working_range (risk 2, mutates, UE 5.3+, smoke)

Sets the editor-only working range in seconds.

Argument	Type	Description
start	number	Inclusive timeline start in seconds. Default 0.0.
end	number	Exclusive timeline end in seconds. Default 5.0.

Returns: timeline, message.

sequencer.spawn_sequence_actor (risk 2, mutates, requires world, smoke)

Places a Level Sequence Actor in the editor level with a sequence and playback settings.

Argument	Type	Description
sequence	string	required. Level Sequence asset path the actor plays.
label	string	required. Actor label (unique in the level).
location	{x,y,z}	World location in centimeters.
autoPlay	boolean	Start playing automatically on BeginPlay. Default false.
loopCount	integer	Extra loops after the first play; -1 loops forever. Default 0.
playRate	number	Playback rate multiplier (> 0). Default 1.0.

Returns: actor, changedActors, message.

sequencer.stop (risk 0, requires PIE)

Stops playback and rewinds to the start in the PIE world.

Argument	Type	Description
actor	string	required. Label or object name of the Level Sequence Actor.

Returns: actor, sequence, playing, paused, time, frame, displayRate, duration, playRate, message.

sequencer.unbind_actor (risk 2, mutates, requires world, smoke)

Removes one level actor (or, with an empty actor, every object) from a possessable; the binding and its tracks stay.

Argument	Type	Description
sequence	string	required. Level Sequence asset path.
binding	string	required. Possessable GUID or name.
actor	string	Actor label/name to unbind. Empty unbinds every object from the possessable.

Returns: binding, changedActors, message.