Handlers API

The plugin splits OBS control into 11 domain handlers, each a UInhyeongOBSHandlerBase subclass owned by the central UInhyeongOBSWebSocketClient. A handler caches its own domain state, sends requests through the client, and fires both a Blueprint-assignable dynamic delegate (FOBSOn*) and a matching native C++ delegate (FOBSOn*Native) for every event. Every BlueprintAssignable On* delegate listed below has an identically-named On*Native C++ counterpart (suffix Native) you can bind from C++ via AddSP / AddLambda.

Reaching a handler. From C++ or Blueprint, get the client and call its typed accessor:

UInhyeongOBSScenes* Scenes = Subsystem->GetClient()->GetScenes();
Scenes->SetCurrentProgramScene(TEXT("Gameplay"));

The client accessors are GetScenes(), GetAudio(), GetOutputs(), GetInputSettings(), GetMediaInputs(), GetStudioMode(), GetTransitions(), GetFilters(), GetScreenshots(), GetConfig(), and GetGeneral(). Handlers are created lazily on first access.

Many of the most common operations are also mirrored as convenience methods on the Subsystem API (e.g. scene switching, recording, mute/volume) so Blueprints never need to touch the handler. Where a Subsystem mirror exists it is noted under each handler. Methods only available on the handler (no Subsystem mirror) include replay collision-proofing (Outputs), persistent data (Config), the T-Bar (StudioMode), device-property enumeration (InputSettings), and game-event emission (General). For the full event catalog and signatures see Events.

Methods that take a TSharedPtr<FJsonObject> are C++-only. Their *FromString siblings are the Blueprint-friendly equivalents that accept a JSON string.

UInhyeongOBSScenes

Scene switching, scene CRUD, groups, scene items (sources), z-order/lock/blend, and full scene-item transforms. Reached via GetClient()->GetScenes(). Common operations are mirrored on the Subsystem.

Function	Params	Description
`GetSceneList`	None	Request the scene list (fires `OnSceneListUpdated`).
`SetCurrentProgramScene`	`SceneName`	Switch the program scene by name.
`GetCurrentProgramScene`	None	Request the current program scene.
`CreateScene`	`SceneName`	Create a new (uniquely-named) scene.
`RemoveScene`	`SceneName`	Remove a scene by name.
`RemoveSceneByUuid`	`SceneUuid`	Remove a scene by UUID.
`SetSceneName`	`SceneName, NewSceneName`	Rename a scene.
`SetSceneNameByUuid`	`SceneUuid, NewSceneName`	Rename a scene by UUID.
`GetGroupList`	None	List all groups.
`GetGroupSceneItemList`	`GroupName`	List items within a group.
`GetCachedGroups`	→ `TArray<FString>`	Cached group names.
`GetSceneItemSource`	`SceneName, SceneItemId`	Get the source backing a scene item.
`GetSourceActive`	`SourceName`	Get a source’s active/show state.
`GetSourceActiveByUuid`	`SourceUuid`	Same, by UUID.
`GetSceneTransitionOverride`	`SceneName`	Fetch a scene’s transition override.
`SetSceneTransitionOverride`	`SceneName, TransitionName, TransitionDuration=-1`	Set a scene’s transition override (empty name to clear).
`ClearSceneTransitionOverride`	`SceneName`	Clear a scene’s transition override.
`GetCachedTransitionOverride`	`SceneName, OutOverride` → `bool`	Read a cached transition override.
`FetchAllTransitionOverrides`	None	Fetch overrides for all cached scenes.
`GetCurrentSceneName`	→ `FString`	Cached current program scene name.
`GetCachedScenes`	→ `TArray<FOBSScene>`	Cached scene list.
`GetCachedScenesWithItems`	→ `TArray<FOBSSceneWithItems>`	Cached scenes plus their items.
`GetSceneItemList`	`SceneName`	List scene items (sources) in a scene.
`SetSceneItemEnabled`	`SceneName, SceneItemId, bEnabled`	Show/hide a scene item.
`GetSceneItemId`	`SceneName, SourceName`	Resolve a source name to its numeric scene-item id.
`CreateSceneItem`	`SceneName, SourceName, bEnabled=true`	Add an existing source to a scene.
`RemoveSceneItem`	`SceneName, SceneItemId`	Remove a scene item (reference only).
`DuplicateSceneItem`	`SceneName, SceneItemId, DestinationSceneName=""`	Duplicate a scene item (reference).
`GetSceneItemLocked`	`SceneName, SceneItemId`	Get a scene item’s lock state.
`SetSceneItemLocked`	`SceneName, SceneItemId, bLocked`	Lock/unlock a scene item.
`GetSceneItemIndex`	`SceneName, SceneItemId`	Get a scene item’s z-order index.
`SetSceneItemIndex`	`SceneName, SceneItemId, SceneItemIndex`	Set a scene item’s z-order index.
`GetSceneItemBlendMode`	`SceneName, SceneItemId`	Get a scene item’s blend mode.
`SetSceneItemBlendMode`	`SceneName, SceneItemId, BlendMode`	Set a scene item’s blend mode (`EOBSBlendMode`).
`GetSceneItemTransform`	`SceneName, SceneItemId`	Fetch a scene item’s transform.
`SetSceneItemTransform`	`SceneName, SceneItemId, Transform`	Apply a full `FOBSSceneItemTransform`.
`SetSceneItemPosition`	`SceneName, SceneItemId, X, Y`	Set position only.
`SetSceneItemRotation`	`SceneName, SceneItemId, Rotation`	Set rotation only (degrees).
`SetSceneItemScale`	`SceneName, SceneItemId, ScaleX, ScaleY`	Set scale only.
`SetSceneItemCrop`	`SceneName, SceneItemId, Left, Top, Right, Bottom`	Set crop only.
`SetSceneItemBounds`	`SceneName, SceneItemId, BoundsType, BoundsWidth, BoundsHeight, BoundsAlignment=0`	Set bounding-box properties.
`GetCachedSceneItemTransform`	`SceneName, SceneItemId, OutTransform` → `bool`	Read a cached transform.
`FetchSceneItemTransforms`	`SceneName`	Cache transforms for all items in a scene.
`FetchAllSceneItemTransforms`	None	Cache transforms for all items in all scenes (fires `OnAllTransformsFetched`).
`IsTransformCached`	`SceneName, SceneItemId` → `bool`	Whether a transform is cached.
`SetTransformEventsEnabled`	`bEnable`	Opt into the high-volume `SceneItemTransformChanged` event.
`AreTransformEventsEnabled`	→ `bool`	Whether transform events are subscribed.
`RefreshAllSceneData`	None	Refresh all scene data.
`GetCachedTransformCount`	→ `int32`	Diagnostic count of cached transforms.
`GetCachedTransitionOverrideCount`	→ `int32`	Diagnostic count of cached overrides.

C++-only: SetSceneItemTransformFromJson plus static helpers TransformToJson, JsonToTransform, BoundsTypeToString/StringToBoundsType, BlendModeToString/StringToBlendMode.

Event	Params	Description
`OnSceneListUpdated`	`Scenes`	Scene list changed.
`OnAllTransformsFetched`	`Scenes`	`FetchAllSceneItemTransforms` completed.
`OnCurrentSceneChanged`	`SceneName`	Program scene changed.
`OnSceneItemTransformChanged`	`SceneName, SceneItemId, Transform`	A scene item’s transform changed (requires `SetTransformEventsEnabled(true)`).
`OnSceneItemCreated`	scene-item details	A source was added to a scene.
`OnSceneItemRemoved`	scene-item details	A scene item was removed.
`OnSceneItemLockStateChanged`	lock details	A scene item’s lock state changed.
`OnSceneItemEnableStateChanged`	enable details	A scene item’s visibility changed.
`OnSceneItemListReindexed`	`SceneName`	Scene items were reordered.
`OnSceneCreated`	scene details	A scene was created.
`OnSceneRemoved`	scene details	A scene was removed.
`OnSceneNameChanged`	rename details	A scene was renamed.
`OnTransitionOverrideReceived`	override data	A scene’s transition override arrived.

UInhyeongOBSAudio

Inputs, mute, volume (dB and multiplier), advanced audio (balance, sync offset, monitor type, tracks), special inputs, input CRUD, and voice-activity opt-ins. Reached via GetClient()->GetAudio(). Mute/volume and input-list helpers are mirrored on the Subsystem.

Function	Params	Description
`GetInputList`	`InputKind=""`	List inputs, optionally filtered by kind.
`GetCachedInputs`	→ `TArray<FOBSInput>`	Cached input list.
`GetCachedInput`	`InputName, OutInput` → `bool`	One cached input by name.
`RefreshAllAudioInfo`	None	Fetch volume/mute for all cached audio inputs.
`SetInputMute`	`InputName, bMuted`	Set mute state.
`ToggleInputMute`	`InputName`	Toggle mute.
`GetInputMute`	`InputName`	Query mute (updates cache + fires event).
`SetInputVolume`	`InputName, VolumeDb`	Set volume in dB.
`SetInputVolumeMultiplier`	`InputName, VolumeMul`	Set volume as a multiplier.
`GetInputVolume`	`InputName`	Query volume (updates cache + fires event).
`AdjustInputVolume`	`InputName, DeltaDb`	Relative volume change in dB.
`RefreshAllAdvancedAudioInfo`	None	Fetch balance/sync/monitor/tracks for all cached inputs.
`SetVolumeMetersEnabled`	`bEnable`	Opt into the high-volume `InputVolumeMeters` stream (drives `OnInputVolumeMeters`).
`SetInputActiveStateEventsEnabled`	`bEnable`	Opt into `InputActiveStateChanged` (drives `OnInputActiveStateChanged`).
`GetLastVolumeMeters`	→ `TArray<FOBSInputVolumeMeter>`	Most recent volume-meter frame.
`GetInputAudioBalance`	`InputName`	Query stereo balance.
`SetInputAudioBalance`	`InputName, Balance`	Set balance (0=left, 0.5=center, 1=right).
`GetInputAudioSyncOffset`	`InputName`	Query A/V sync offset (ms).
`SetInputAudioSyncOffset`	`InputName, OffsetMs`	Set sync offset (-950..20000, may be negative).
`GetInputAudioMonitorType`	`InputName`	Query monitor type.
`SetInputAudioMonitorType`	`InputName, MonitorType`	Set monitor type (`EOBSMonitorType`).
`GetInputAudioTracks`	`InputName`	Query audio-track enable states.
`SetInputAudioTracks`	`InputName, Tracks`	Set all tracks (`FOBSAudioTracks`, tracks 1-6).
`SetInputAudioTrack`	`InputName, TrackNumber, bEnabled`	Set a single track (1-6).
`GetSpecialInputs`	None	Get default desktop/mic input names.
`GetCachedSpecialInputs`	→ `FOBSSpecialInputs`	Cached special inputs.
`CreateInputFromString`	`SceneName, InputName, InputKind, InputSettingsJson="", bSceneItemEnabled=true`	Create a new input + add to a scene.
`RemoveInput`	`InputName`	Remove an input (fails if still in use).
`SetInputName`	`InputName, NewInputName`	Rename an input.
`GetInputKindList`	`bUnversioned=false`	List available input kinds.
`GetCachedInputKinds`	→ `TArray<FString>`	Cached input kinds.
`SupportsAdvancedAudioProperties`	`InputKind` → `bool`	(static) Whether a kind supports balance/sync/tracks/monitor.
`IsAudioInputKind`	`InputKind` → `bool`	(static) Whether a kind is an audio type.

C++-only: the *ByUuid variants (GetInputAudioBalanceByUuid, etc.), CreateInput, and RemoveInputByUuid.

Event	Params	Description
`OnInputListUpdated`	`Inputs`	Input list changed.
`OnInputMuteStateChanged`	`InputName, bMuted`	An input’s mute changed.
`OnInputVolumeChanged`	`InputName, VolumeDb, VolumeMul`	An input’s volume changed.
`OnInputVolumeMeters`	`Meters`	High-volume per-input levels (requires `SetVolumeMetersEnabled(true)`).
`OnInputActiveStateChanged`	`InputName, bVideoActive`	An input’s video-active state changed (requires opt-in).
`OnInputCreated`	input details	An input was created.
`OnInputRemoved`	input details	An input was removed.
`OnInputNameChanged`	rename details	An input was renamed.
`OnInputKindListReceived`	kinds	Input-kind list arrived.
`OnInputAudioBalanceChanged`	balance	Balance changed/retrieved.
`OnInputAudioSyncOffsetChanged`	offset	Sync offset changed/retrieved.
`OnInputAudioTracksChanged`	tracks	Tracks changed/retrieved.
`OnInputAudioMonitorTypeChanged`	monitor type	Monitor type changed/retrieved.
`OnSpecialInputsReceived`	special inputs	Special inputs retrieved.

UInhyeongOBSOutputs

Streaming, recording (incl. pause/resume, split, chapters), virtual camera, replay buffer (incl. collision-proofing), record directory, generic outputs, and stream captions. Reached via GetClient()->GetOutputs(). Streaming/recording control is mirrored on the Subsystem, but replay collision-proofing is handler-only.

Function	Params	Description
`StartStream` / `StopStream` / `ToggleStream`	None	Streaming control.
`GetStreamStatus`	None	Request stream status.
`IsStreaming`	→ `bool`	Cached streaming flag.
`GetLastStreamStatus`	→ `FOBSStreamStatus`	Last stream status.
`StartRecord` / `StopRecord` / `ToggleRecord`	None	Recording control.
`PauseRecord` / `ResumeRecord` / `ToggleRecordPause`	None	Recording pause control.
`GetRecordStatus`	None	Request record status.
`IsRecording`	→ `bool`	Cached recording flag.
`GetLastRecordStatus`	→ `FOBSRecordStatus`	Last record status.
`StartVirtualCam` / `StopVirtualCam` / `ToggleVirtualCam`	None	Virtual camera control.
`GetVirtualCamStatus`	None	Request virtual-cam status.
`IsVirtualCamActive`	→ `bool`	Cached virtual-cam flag.
`StartReplayBuffer` / `StopReplayBuffer` / `ToggleReplayBuffer`	None	Replay buffer control.
`SaveReplayBuffer`	None	Save the current replay buffer.
`GetReplayBufferStatus`	None	Request replay-buffer status.
`IsReplayBufferActive`	→ `bool`	Cached replay-buffer flag.
`GetLastReplayPath`	→ `FString`	Path of the last saved replay (post-rename).
`SetReplayCollisionProofing`	`bEnable`	Rename each saved replay with a unique timestamp suffix (handler-only).
`IsReplayCollisionProofingEnabled`	→ `bool`	Whether collision-proofing is on.
`SetNextReplayContextLabel`	`Label`	One-shot label embedded in the next saved replay’s filename.
`SaveReplayBufferWithContext`	`ContextLabel`	Set the next-replay label and save immediately.
`GetRecordDirectory`	None	Request the record directory.
`SetRecordDirectory`	`Directory`	Set the record directory (next recording).
`GetCachedRecordDirectory`	→ `FString`	Cached record directory.
`GetLastRecordedFilePath`	→ `FString`	Path of the last recorded file.
`SplitRecordFile`	None	Split the recording into a new file.
`CreateRecordChapter`	`ChapterName=""`	Add a chapter marker (OBS 30.2.0+, Hybrid MP4).
`GetOutputList`	None	List all outputs.
`GetOutputStatus`	`OutputName`	Status of one output.
`GetOutputSettings`	`OutputName`	Settings of one output.
`SetOutputSettingsFromString`	`OutputName, JsonSettings`	Set output settings from JSON.
`StartOutput` / `StopOutput` / `ToggleOutput`	`OutputName`	Control a specific output.
`GetCachedOutputs`	→ `TArray<FOBSOutput>`	Cached output list.
`SendStreamCaption`	`CaptionText`	Send CEA-608 caption text (stream must be active).

C++-only: SetOutputSettings (JSON object) plus static helpers BuildReplayFilename and SanitizeReplayLabel.

Event	Params	Description
`OnStreamStateChanged`	state	Stream state changed.
`OnRecordStateChanged`	state	Record state changed.
`OnRecordingStopped`	output path	Recording stopped (with file path).
`OnVirtualCamStateChanged`	state	Virtual-cam state changed.
`OnReplayBufferStateChanged`	state	Replay-buffer state changed.
`OnReplayBufferSaved`	saved path	Replay saved (final path after any rename).
`OnRecordFileChanged`	new path	Record output rolled to a new file (split).
`OnRecordDirectoryReceived`	directory	Record directory fetched.
`OnOutputListReceived`	outputs	Output list fetched.
`OnOutputStatusReceived`	status	Output status fetched.

UInhyeongOBSInputSettings

Source settings for text/browser/image/media/color sources, default settings, and capture-device property access. Reached via GetClient()->GetInputSettings(). Button-press and list-property enumeration are handler-only.

Function	Params	Description
`GetInputSettings`	`InputName`	Fetch an input’s settings (fires `OnInputSettingsReceivedNative`).
`GetInputSettingsByUuid`	`InputUuid`	Same, by UUID.
`SetInputSettingsFromString`	`InputName, InputSettingsJson, bOverlay=true`	Apply settings from JSON.
`GetInputDefaultSettings`	`InputKind`	Get default settings for a kind.
`PressInputPropertiesButton`	`InputName, PropertyName`	Press a button-type property (e.g. capture-device activate/deactivate).
`GetInputPropertiesListPropertyItems`	`InputName, PropertyName`	Enumerate a list-property’s items (device dropdown). Fires `OnInputPropertyItemsReceived`.
`GetCachedInputSettingsString`	`InputName` → `FString`	Cached settings as JSON.
`HasCachedSettings`	`InputName` → `bool`	Whether settings are cached.
`ClearCachedSettings`	`InputName`	Clear one input’s cache.
`ClearAllCachedSettings`	None	Clear the whole settings cache.
`SetTextSourceText`	`InputName, NewText`	Set a text source’s text.
`SetBrowserSourceUrl`	`InputName, NewUrl`	Set a browser source’s URL.
`SetImageSourceFile`	`InputName, NewFilePath`	Set an image source’s file.
`SetMediaSourceFile`	`InputName, NewFilePath, bLooping=false`	Set a media source’s file.
`SetColorSourceColor`	`InputName, Color`	Set a color source’s color (ABGR int64).

C++-only: SetInputSettings / SetInputSettingsByUuid (JSON object) and GetCachedInputSettings (JSON object out-param).

Event	Params	Description
`OnInputSettingsChanged`	input details	An input’s settings changed.
`OnInputPropertyItemsReceived`	property items	A list-property’s items (device dropdown) arrived.

Native-only: OnInputSettingsReceivedNative delivers the actual settings JSON from a GetInputSettings call.

UInhyeongOBSMediaInputs

Playback control, seeking, and status for media sources (VLC, Media Source). Reached via GetClient()->GetMediaInputs(). Defines the EOBSMediaInputAction and EOBSMediaState enums and the FOBSMediaInputStatus struct.

Function	Params	Description
`GetMediaInputStatus`	`InputName`	Query state/duration/cursor.
`GetCachedMediaInputStatus`	`InputName, OutStatus` → `bool`	Last cached status.
`TriggerMediaInputAction`	`InputName, Action`	Perform an `EOBSMediaInputAction`.
`PlayMedia` / `PauseMedia` / `StopMedia` / `RestartMedia`	`InputName`	Playback shortcuts.
`NextMedia` / `PreviousMedia`	`InputName`	Playlist navigation.
`SetMediaInputCursor`	`InputName, CursorMs`	Seek to an absolute position (ms).
`OffsetMediaInputCursor`	`InputName, OffsetMs`	Relative seek (ms).
`SeekToPercent`	`InputName, Percent`	Seek to a fraction (0.0-1.0) of duration.

Static helpers: MediaInputActionToString, MediaInputActionFromString, ParseMediaState.

Event	Params	Description
`OnMediaInputPlaybackStarted`	`InputName`	Playback started.
`OnMediaInputPlaybackEnded`	`InputName`	Playback ended.
`OnMediaInputActionTriggered`	`InputName, Action`	A media action fired.
`OnMediaInputStatusReceived`	`Status`	Media status arrived.

UInhyeongOBSStudioMode

Studio Mode toggle, preview scene, and transitions including manual T-Bar scrubbing. Reached via GetClient()->GetStudioMode(). SetTBarPosition is handler-only.

Function	Params	Description
`GetStudioModeEnabled`	None	Query Studio Mode state.
`SetStudioModeEnabled`	`bEnabled`	Enable/disable Studio Mode.
`IsStudioModeEnabled`	→ `bool`	Cached Studio Mode flag.
`GetCurrentPreviewScene`	None	Query the preview scene.
`SetCurrentPreviewScene`	`SceneName`	Set the preview scene by name.
`SetCurrentPreviewSceneByUuid`	`SceneUuid`	Set the preview scene by UUID.
`GetPreviewSceneName`	→ `FString`	Cached preview scene name.
`GetPreviewSceneUuid`	→ `FString`	Cached preview scene UUID.
`TriggerStudioModeTransition`	None	Transition Preview to Program.
`TriggerStudioModeTransitionWithOptions`	`TransitionName, TransitionDurationMs=-1`	Transition with a specific transition/duration.
`SetTBarPosition`	`Position, bRelease=true`	Scrub the T-Bar (0=preview, 1=transitioned). Pass `bRelease=false` to hold it, for example on a Sequencer float track.

Event	Params	Description
`OnStudioModeStateChanged`	`bEnabled`	Studio Mode toggled.
`OnCurrentPreviewSceneChanged`	scene	Preview scene changed.

UInhyeongOBSTransitions

The current transition, its duration and settings, and live transition progress. Reached via GetClient()->GetTransitions().

Function	Params	Description
`GetSceneTransitionList`	None	List available transitions (fires `OnTransitionListUpdated`).
`GetCachedTransitions`	→ `TArray<FOBSTransition>`	Cached transition list.
`GetCurrentSceneTransition`	None	Query the current transition.
`SetCurrentSceneTransition`	`TransitionName`	Set the current transition.
`GetCurrentTransitionInfo`	→ `FOBSCurrentTransitionInfo`	Cached current-transition info.
`GetCurrentTransitionName`	→ `FString`	Cached current transition name.
`SetCurrentSceneTransitionDuration`	`DurationMs`	Set the transition duration.
`GetCurrentTransitionDuration`	→ `int32`	Cached transition duration (ms).
`SetCurrentSceneTransitionSettingsFromString`	`SettingsJson, bOverlay=true`	Set transition-specific settings from JSON.
`GetCurrentSceneTransitionCursor`	None	Query the active transition’s cursor.
`GetCachedTransitionCursor`	→ `float`	Last cursor value (0.0-1.0, or -1).
`IsTransitionActive`	→ `bool`	Whether a transition is in progress.

C++-only: SetCurrentSceneTransitionSettings (JSON object).

Event	Params	Description
`OnCurrentTransitionChanged`	name	Current transition changed.
`OnTransitionDurationChanged`	duration	Transition duration changed.
`OnTransitionStarted`	name	A transition started.
`OnTransitionEnded`	name	A transition ended (cut point).
`OnTransitionVideoEnded`	name	A transition’s video ended (Stingers).
`OnTransitionListUpdated`	list	Transition list changed.

UInhyeongOBSFilters

Source-filter CRUD, enable/reorder, and per-filter settings on inputs, scenes, and groups. Reached via GetClient()->GetFilters().

Function	Params	Description
`GetSourceFilterKindList`	None	List available filter kinds.
`GetCachedFilterKinds`	→ `TArray<FString>`	Cached filter kinds.
`GetSourceFilterList`	`SourceName`	List a source’s filters.
`GetSourceFilterListByUuid`	`SourceUuid`	Same, by UUID.
`GetCachedFiltersForSource`	`SourceName` → `TArray<FOBSSourceFilter>`	Cached filters for a source.
`HasCachedFiltersForSource`	`SourceName` → `bool`	Whether filters are cached.
`ClearCachedFiltersForSource`	`SourceName`	Clear one source’s filter cache.
`ClearAllCachedFilters`	None	Clear the whole filter cache.
`GetSourceFilter`	`SourceName, FilterName`	Get one filter’s info.
`GetSourceFilterDefaultSettings`	`FilterKind`	Default settings for a filter kind.
`CreateSourceFilterFromString`	`SourceName, FilterName, FilterKind, FilterSettingsJson=""`	Create a filter (JSON settings).
`RemoveSourceFilter`	`SourceName, FilterName`	Remove a filter.
`SetSourceFilterName`	`SourceName, FilterName, NewFilterName`	Rename a filter.
`SetSourceFilterIndex`	`SourceName, FilterName, FilterIndex`	Reorder a filter in the chain.
`SetSourceFilterEnabled`	`SourceName, FilterName, bEnabled`	Enable/disable a filter.
`SetSourceFilterSettingsFromString`	`SourceName, FilterName, FilterSettingsJson, bOverlay=true`	Set filter settings from JSON.

C++-only: CreateSourceFilter and SetSourceFilterSettings (JSON object).

Event	Params	Description
`OnSourceFilterCreated`	filter details	A filter was created.
`OnSourceFilterRemoved`	filter details	A filter was removed.
`OnSourceFilterNameChanged`	rename details	A filter was renamed.
`OnSourceFilterSettingsChanged`	filter details	A filter’s settings changed.
`OnSourceFilterEnableStateChanged`	enable details	A filter’s enable state changed.
`OnSourceFilterListReindexed`	`SourceName`	A source’s filter list was reordered.

Native-only: OnSourceFilterListReceivedNative fires after a GetSourceFilterList response is cached (used by editor combobox refresh).

UInhyeongOBSScreenshots

Capture screenshots to base64 or save to the OBS machine’s filesystem, plus texture-conversion utilities. Reached via GetClient()->GetScreenshots(). This handler has no OBS events and is pure request/response. Its On* delegates are handler-level only and not mirrored on the Subsystem.

Function	Params	Description
`GetSourceScreenshot`	`SourceName, ImageFormat="png"`	Capture to base64 (fires `OnScreenshotCaptured`).
`GetSourceScreenshotByUuid`	`SourceUuid, ImageFormat="png"`	Same, by UUID.
`GetSourceScreenshotWithOptions`	`Request`	Capture with full `FOBSScreenshotRequest` control.
`GetSourceScreenshotScaled`	`SourceName, ImageFormat, Width, Height, CompressionQuality=-1`	Capture scaled.
`SaveSourceScreenshot`	`SourceName, FilePath, ImageFormat="png"`	Save to a file on the OBS machine (fires `OnScreenshotSaved`).
`SaveSourceScreenshotByUuid`	`SourceUuid, FilePath, ImageFormat="png"`	Same, by UUID.
`SaveSourceScreenshotWithOptions`	`Request`	Save with full control (`Request.ImageFilePath` required).
`SaveSourceScreenshotScaled`	`SourceName, FilePath, ImageFormat, Width, Height, CompressionQuality=-1`	Save scaled.
`CreateTextureFromBase64`	`Base64ImageData` → `UTexture2D*`	(static) Decode base64 to a texture.
`CreateTextureFromScreenshotResult`	`Result` → `UTexture2D*`	(static) Texture from an `FOBSScreenshotResult`.
`DecodeBase64ImageData`	`Base64ImageData, OutBytes, OutFormat` → `bool`	(static) Decode base64 to raw bytes.
`CreateTextureFromBytes`	`ImageBytes` → `UTexture2D*`	(static) Texture from raw bytes.
`GetLastScreenshotResult`	→ `FOBSScreenshotResult`	Last captured result.
`GetLastSavedResult`	→ `FOBSScreenshotSavedResult`	Last saved result.
`IsCapturePending`	→ `bool`	Whether a capture is in flight.

Event	Params	Description
`OnScreenshotCaptured`	result	Base64 screenshot ready.
`OnScreenshotSaved`	result	Screenshot saved to the filesystem.

UInhyeongOBSConfig

Scene collections, profiles, profile parameters, stream-service settings, video settings, and a plugin-owned persistent key/value store. Reached via GetClient()->GetConfig(). Persistent-data methods are handler-only.

Function	Params	Description
`GetSceneCollectionList`	None	List scene collections (fires `OnSceneCollectionListChanged`).
`SetCurrentSceneCollection`	`SceneCollectionName`	Switch scene collection (causes a reload pause).
`CreateSceneCollection`	`SceneCollectionName`	Create and switch to a new collection.
`GetCachedSceneCollections`	→ `TArray<FString>`	Cached collection names.
`GetCurrentSceneCollectionName`	→ `FString`	Cached current collection.
`GetProfileList`	None	List profiles (fires `OnProfileListChanged`).
`SetCurrentProfile`	`ProfileName`	Switch profile.
`CreateProfile`	`ProfileName`	Create and switch to a profile.
`RemoveProfile`	`ProfileName`	Remove a profile (not the active one).
`GetCachedProfiles`	→ `TArray<FString>`	Cached profile names.
`GetCurrentProfileName`	→ `FString`	Cached current profile.
`GetProfileParameter`	`ParameterCategory, ParameterName`	Read a profile config parameter.
`SetProfileParameter`	`ParameterCategory, ParameterName, ParameterValue`	Write a profile config parameter.
`GetStreamServiceSettings`	None	Fetch stream-service settings (fires `OnStreamServiceSettingsReceived`).
`SetStreamServiceSettings`	`Settings`	Set stream-service settings (`FOBSStreamServiceSettings`).
`SetStreamServiceSettingsFromString`	`ServiceType, JsonSettings`	Set from JSON.
`SetSimpleRTMPSettings`	`Server, StreamKey`	Quick custom-RTMP setup.
`GetCachedStreamServiceSettings`	→ `FOBSStreamServiceSettings`	Cached settings.
`GetVideoSettings`	None	Fetch video settings (fires `OnVideoSettingsReceived`).
`SetVideoSettings`	`Settings`	Set video settings (not while streaming/recording).
`SetBaseResolution`	`Width, Height`	Set canvas resolution.
`SetOutputResolution`	`Width, Height`	Set scaled output resolution.
`SetFPS`	`FpsNumerator, FpsDenominator=1`	Set FPS as a fraction.
`GetCachedVideoSettings`	→ `FOBSVideoSettings`	Cached video settings.
`GetPersistentData`	`Realm, SlotName`	Read a persistent slot (fires `OnPersistentDataReceived`).
`SetPersistentData`	`Realm, SlotName, SlotValueJson` → `bool`	Write a slot from a JSON value (empty = null). Invalid JSON returns false and sends nothing.
`SetPersistentDataString`	`Realm, SlotName, SlotValue`	Write a slot as a plain string.
`GetCachedPersistentData`	`Realm, SlotName, OutSlotValueJson` → `bool`	Read a cached slot.

Realm is EOBSDataRealm (Global or Profile). C++-only: SetStreamServiceSettingsRaw (JSON object).

Event	Params	Description
`OnStreamServiceSettingsReceived`	settings	Stream-service settings retrieved.
`OnVideoSettingsReceived`	settings	Video settings retrieved.
`OnPersistentDataReceived`	slot value	A persistent slot was retrieved.
`OnCurrentSceneCollectionChanging`	name	Scene collection about to change.
`OnCurrentSceneCollectionChanged`	name	Scene collection changed.
`OnSceneCollectionListChanged`	list	Scene-collection list changed.
`OnCurrentProfileChanging`	name	Profile about to change.
`OnCurrentProfileChanged`	name	Profile changed.
`OnProfileListChanged`	list	Profile list changed.

UInhyeongOBSGeneral

Cross-domain operations: performance stats, hotkeys, vendor (third-party plugin) requests, custom/exit events, and outbound game-event emission. Reached via GetClient()->GetGeneral(). (OBS version is captured directly by the client via GetOBSVersion / IsOBSVersionAtLeast.) EmitGameEvent is forwarded on the Subsystem. The rest are handler-only.

Function	Params	Description
`GetStats`	None	Request performance stats (fires `OnStatsReceived`).
`GetCachedStats`	→ `FOBSStats`	Most recent stats.
`GetHotkeyList`	None	Request all hotkey names (fires `OnHotkeyListReceived`).
`GetCachedHotkeys`	→ `TArray<FString>`	Cached hotkey names.
`TriggerHotkeyByName`	`HotkeyName, ContextName=""`	Trigger a hotkey by name.
`TriggerHotkeyByKeySequence`	`KeyId, bShift=false, bControl=false, bAlt=false, bCommand=false`	Trigger a hotkey by key id + modifiers.
`BroadcastCustomEvent`	`EventDataJson`	Broadcast a custom event to other websocket clients.
`CallVendorRequest`	`VendorName, RequestType, RequestDataJson`	Call a third-party plugin request (fires `OnVendorResponseReceived`).
`EmitGameEvent`	`EventName, PayloadJson, Realm="inhyeongobs"` → `bool`	Emit a namespaced game event (returns false on invalid payload JSON).
`EmitGameEventMap`	`EventName, Payload (TMap), Realm="inhyeongobs"`	Map-based convenience for `EmitGameEvent`.

Event	Params	Description
`OnStatsReceived`	stats	Performance stats arrived.
`OnHotkeyListReceived`	hotkeys	Hotkey list arrived.
`OnExitStarted`	None	OBS is shutting down.
`OnVendorEvent`	vendor payload	A vendor (plugin) event arrived.
`OnCustomEvent`	custom payload	A custom event arrived from another client.
`OnVendorResponseReceived`	vendor response	A `CallVendorRequest` reply arrived.

Desuq Cafe