MiXiD API Reference: Media Files and Replay

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Reference size:
52 headers
260 properties
354 methods and callbacks

Detailed MiXiD XCFramework reference for Media Files and Replay. Read through each header, class, protocol, and function section to inspect Objective-C declarations, parameters, return values, and usage guidance.

Media Files and Replay

MXDMediaFileRecorder.h

Media file recorder for MiXiD pipelines.

MXDMediaFileRecorderDelegate Protocol

mediaFileRecorderDidStartRecordingToURL:

- (void)mediaFileRecorderDidStartRecordingToURL:(NSURL *)outputURL;

Kind	Delegate / protocol callback
Return	`void`
Details	Callback invoked by MiXiD for mediaFileRecorderDidStartRecordingToURL. Implement this method to observe lifecycle, media output, status, or error events.
Parameters	`mediaFileRecorderDidStartRecordingToURL` (`NSURL *`, outputURL)
Swift usage	`instance.mediaFileRecorderDidStartRecordingToURL(mediaFileRecorderDidStartRecordingToURL: url)`

mediaFileRecorderDidFinishRecordingToURL:

- (void)mediaFileRecorderDidFinishRecordingToURL:(NSURL *)outputURL;

Kind	Delegate / protocol callback
Return	`void`
Details	Callback invoked by MiXiD for mediaFileRecorderDidFinishRecordingToURL. Implement this method to observe lifecycle, media output, status, or error events.
Parameters	`mediaFileRecorderDidFinishRecordingToURL` (`NSURL *`, outputURL)
Swift usage	`instance.mediaFileRecorderDidFinishRecordingToURL(mediaFileRecorderDidFinishRecordingToURL: url)`

mediaFileRecorderDidFailWithError:

- (void)mediaFileRecorderDidFailWithError:(NSError *)error;

Kind	Delegate / protocol callback
Return	`void`
Details	Callback invoked by MiXiD for mediaFileRecorderDidFailWithError. Implement this method to observe lifecycle, media output, status, or error events.
Parameters	`mediaFileRecorderDidFailWithError` (`NSError *`, error)
Swift usage	`instance.mediaFileRecorderDidFailWithError(mediaFileRecorderDidFailWithError: nil)`

mediaFileRecorderDidUpdateStatus:

- (void)mediaFileRecorderDidUpdateStatus:(NSString *)status;

Kind	Delegate / protocol callback
Return	`void`
Details	Callback invoked by MiXiD for mediaFileRecorderDidUpdateStatus. Implement this method to observe lifecycle, media output, status, or error events.
Parameters	`mediaFileRecorderDidUpdateStatus` (`NSString *`, status)
Swift usage	`instance.mediaFileRecorderDidUpdateStatus(mediaFileRecorderDidUpdateStatus: "value")`

MXDMediaFileRecorder

Name	Declaration	Details
`delegate`	`@property (nonatomic, weak, nullable) id<MXDMediaFileRecorderDelegate> delegate;`	Receives lifecycle, media output, status, or error callbacks.
`outputURL`	`@property (nonatomic, strong, readonly) NSURL *outputURL;`	Endpoint or file URL used by the component.
`recording`	`@property (nonatomic, assign, readonly, getter=isRecording) BOOL recording;`	Read-only runtime state flag.

prewarm

+ (void)prewarm;

Kind	Class method
Return	`void`
Details	Creates, discovers, or returns shared information for prewarm. Call this on the class before creating or configuring an instance.
Parameters	No parameters.
Swift usage	`MXDMediaFileRecorder.prewarm()`

initWithOutputURL:

- (instancetype)initWithOutputURL:(NSURL *)outputURL;

Kind	Instance method
Return	`instancetype`
Details	Initializes the receiver for initWithOutputURL. Use this to provide required URLs, ports, names, peer connections, or configuration objects.
Parameters	`initWithOutputURL` (`NSURL *`, outputURL)
Swift usage	`let value = MXDMediaFileRecorder(initWithOutputURL: url)`

start

- (void)start;

Kind	Instance method
Return	`void`
Details	Starts the component and begins the related capture, server, playback, publish, recording, or discovery workflow.
Parameters	No parameters.
Swift usage	`instance.start()`

stop

- (void)stop;

Kind	Instance method
Return	`void`
Details	Stops the component and releases or finalizes active workflow resources.
Parameters	No parameters.
Swift usage	`instance.stop()`

appendVideoFrame:presentationTime:

- (void)appendVideoFrame:(CVImageBufferRef)imageBuffer presentationTime:(CMTime)presentationTime;

Kind	Instance method
Return	`void`
Details	Appends media into the component. Use presentation timestamps and matching stream configuration so downstream encoders, mixers, or recorders stay synchronized.
Parameters	`appendVideoFrame` (`CVImageBufferRef`, imageBuffer); `presentationTime` (`CMTime`, presentationTime)
Swift usage	`instance.appendVideoFrame(appendVideoFrame: imageBuffer, presentationTime: 0.0)`

appendAudioBuffer:

- (void)appendAudioBuffer:(AVAudioPCMBuffer *)audioBuffer;

Kind	Instance method
Return	`void`
Details	Appends media into the component. Use presentation timestamps and matching stream configuration so downstream encoders, mixers, or recorders stay synchronized.
Parameters	`appendAudioBuffer` (`AVAudioPCMBuffer *`, audioBuffer)
Swift usage	`instance.appendAudioBuffer(appendAudioBuffer: audioBuffer)`

appendAACAccessUnit:sampleRate:channels:objectType:config:

- (void)appendAACAccessUnit:(NSData *)accessUnit sampleRate:(Float64)sampleRate channels:(UInt32)channels objectType:(UInt32)objectType config:(NSData * _Nullable)config;

Kind	Instance method
Return	`void`
Details	Appends media into the component. Use presentation timestamps and matching stream configuration so downstream encoders, mixers, or recorders stay synchronized.
Parameters	`appendAACAccessUnit` (`NSData `, accessUnit); `sampleRate` (`Float64`, sampleRate); `channels` (`UInt32`, channels); `objectType` (`UInt32`, objectType); `config` (`NSData _Nullable`, config)
Swift usage	`instance.appendAACAccessUnit(appendAACAccessUnit: data, sampleRate: 0.0, channels: channels, objectType: objectType, config: data)`

MXDMediaFileView.h

Looping media-file playback source.

MXDMediaFileViewDelegate Protocol

mediaFileViewDidOutputVideoFrame:presentationTime:

- (void)mediaFileViewDidOutputVideoFrame:(CVImageBufferRef)imageBuffer presentationTime:(CMTime)presentationTime;

Kind	Delegate / protocol callback
Return	`void`
Details	Callback invoked by MiXiD for mediaFileViewDidOutputVideoFrame presentationTime. Implement this method to observe lifecycle, media output, status, or error events.
Parameters	`mediaFileViewDidOutputVideoFrame` (`CVImageBufferRef`, imageBuffer); `presentationTime` (`CMTime`, presentationTime)
Swift usage	`instance.mediaFileViewDidOutputVideoFrame(mediaFileViewDidOutputVideoFrame: imageBuffer, presentationTime: 0.0)`

mediaFileViewDidOutputAudioBuffer:

- (void)mediaFileViewDidOutputAudioBuffer:(AVAudioPCMBuffer *)audioBuffer;

Kind	Delegate / protocol callback
Return	`void`
Details	Callback invoked by MiXiD for mediaFileViewDidOutputAudioBuffer. Implement this method to observe lifecycle, media output, status, or error events.
Parameters	`mediaFileViewDidOutputAudioBuffer` (`AVAudioPCMBuffer *`, audioBuffer)
Swift usage	`instance.mediaFileViewDidOutputAudioBuffer(mediaFileViewDidOutputAudioBuffer: audioBuffer)`

mediaFileViewDidUpdatePosition:duration:

- (void)mediaFileViewDidUpdatePosition:(CMTime)position duration:(CMTime)duration;

Kind	Delegate / protocol callback
Return	`void`
Details	Callback invoked by MiXiD for mediaFileViewDidUpdatePosition duration. Implement this method to observe lifecycle, media output, status, or error events.
Parameters	`mediaFileViewDidUpdatePosition` (`CMTime`, position); `duration` (`CMTime`, duration)
Swift usage	`instance.mediaFileViewDidUpdatePosition(mediaFileViewDidUpdatePosition: presentationTime, duration: presentationTime)`

mediaFileViewDidFailWithError:

- (void)mediaFileViewDidFailWithError:(NSError *)error;

Kind	Delegate / protocol callback
Return	`void`
Details	Callback invoked by MiXiD for mediaFileViewDidFailWithError. Implement this method to observe lifecycle, media output, status, or error events.
Parameters	`mediaFileViewDidFailWithError` (`NSError *`, error)
Swift usage	`instance.mediaFileViewDidFailWithError(mediaFileViewDidFailWithError: nil)`

MXDMediaFileView

Name	Declaration	Details
`URL`	`@property (nonatomic, copy, nullable) NSURL *URL;`	Endpoint or file URL used by the component.
`delegate`	`@property (nonatomic, weak, nullable) id<MXDMediaFileViewDelegate> delegate;`	Receives lifecycle, media output, status, or error callbacks.
`playing`	`@property (nonatomic, assign, readonly, getter=isPlaying) BOOL playing;`	Public configuration or state exposed by this API.
`duration`	`@property (nonatomic, assign, readonly) CMTime duration;`	Public configuration or state exposed by this API.

initWithURL:

- (instancetype)initWithURL:(nullable NSURL *)url;

Kind	Instance method
Return	`instancetype`
Details	Initializes the receiver for initWithURL. Use this to provide required URLs, ports, names, peer connections, or configuration objects.
Parameters	`initWithURL` (`nullable NSURL *`, url)
Swift usage	`let value = MXDMediaFileView(initWithURL: url)`

start

- (void)start;

Kind	Instance method
Return	`void`
Details	Starts the component and begins the related capture, server, playback, publish, recording, or discovery workflow.
Parameters	No parameters.
Swift usage	`instance.start()`

stop

- (void)stop;

Kind	Instance method
Return	`void`
Details	Stops the component and releases or finalizes active workflow resources.
Parameters	No parameters.
Swift usage	`instance.stop()`

seekToTime:

- (void)seekToTime:(CMTime)time;

Kind	Instance method
Return	`void`
Details	Performs the seekToTime operation on this MiXiD component.
Parameters	`seekToTime` (`CMTime`, time)
Swift usage	`instance.seekToTime(seekToTime: 0.0)`

MXDReplayAudioBuffer.h

In-memory rolling audio buffer for MiXiD replay previews.

MXDReplayAudioBuffer

Name	Declaration	Details
`durationSeconds`	`@property (nonatomic, assign) NSTimeInterval durationSeconds;`	Public configuration or state exposed by this API.
`maxMemoryBytes`	`@property (nonatomic, assign) NSUInteger maxMemoryBytes;`	Public configuration or state exposed by this API.
`bufferedDuration`	`@property (nonatomic, assign, readonly) NSTimeInterval bufferedDuration;`	Public configuration or state exposed by this API.
`bufferedByteCount`	`@property (nonatomic, assign, readonly) NSUInteger bufferedByteCount;`	Public configuration or state exposed by this API.

initWithDurationSeconds:maxMemoryBytes:

- (instancetype)initWithDurationSeconds:(NSTimeInterval)durationSeconds maxMemoryBytes:(NSUInteger)maxMemoryBytes NS_DESIGNATED_INITIALIZER;

Kind	Instance method
Return	`instancetype`
Details	Initializes the receiver for initWithDurationSeconds maxMemoryBytes. Use this to provide required URLs, ports, names, peer connections, or configuration objects.
Parameters	`initWithDurationSeconds` (`NSTimeInterval`, durationSeconds); `maxMemoryBytes` (`NSUInteger`, maxMemoryBytes)
Swift usage	`let value = MXDReplayAudioBuffer(initWithDurationSeconds: 0.0, maxMemoryBytes: 0)`

init

- (instancetype)init;

Kind	Instance method
Return	`instancetype`
Details	Initializes the receiver for init. Use this to provide required URLs, ports, names, peer connections, or configuration objects.
Parameters	No parameters.
Swift usage	`let value = MXDReplayAudioBuffer()`

appendAudioBuffer:hostTime:

- (void)appendAudioBuffer:(AVAudioPCMBuffer *)audioBuffer hostTime:(CFTimeInterval)hostTime;

Kind	Instance method
Return	`void`
Details	Appends media into the component. Use presentation timestamps and matching stream configuration so downstream encoders, mixers, or recorders stay synchronized.
Parameters	`appendAudioBuffer` (`AVAudioPCMBuffer *`, audioBuffer); `hostTime` (`CFTimeInterval`, hostTime)
Swift usage	`instance.appendAudioBuffer(appendAudioBuffer: audioBuffer, hostTime: 0.0)`

framesForLookbackSeconds:atHostTime:afterHostTime:

- (NSArray<MXDReplayAudioFrame *> *)framesForLookbackSeconds:(NSTimeInterval)lookbackSeconds atHostTime:(CFTimeInterval)hostTime afterHostTime:(CFTimeInterval)lastHostTime;

Kind	Instance method
Return	`NSArray<MXDReplayAudioFrame > `
Details	Returns derived state, buffered data, preview information, or available source metadata from the component.
Parameters	`framesForLookbackSeconds` (`NSTimeInterval`, lookbackSeconds); `atHostTime` (`CFTimeInterval`, hostTime); `afterHostTime` (`CFTimeInterval`, lastHostTime)
Swift usage	`let result = instance.framesForLookbackSeconds(framesForLookbackSeconds: 0.0, atHostTime: 0.0, afterHostTime: 0.0)`

clear

- (void)clear;

Kind	Instance method
Return	`void`
Details	Clears buffered state held by the object.
Parameters	No parameters.
Swift usage	`instance.clear()`

MXDReplayAudioFrame

Name	Declaration	Details
`hostTime`	`@property (nonatomic, assign, readonly) CFTimeInterval hostTime;`	Public configuration or state exposed by this API.
`duration`	`@property (nonatomic, assign, readonly) NSTimeInterval duration;`	Public configuration or state exposed by this API.
`buffer`	`@property (nonatomic, strong, readonly) AVAudioPCMBuffer *buffer;`	Public configuration or state exposed by this API.
`byteSize`	`@property (nonatomic, assign, readonly) NSUInteger byteSize;`	Public configuration or state exposed by this API.

MXDReplayBufferRecorder.h

In-memory replay buffer recorder for MiXiD streams.

Enums

MXDReplayBufferVideoCodec

MXDReplayBufferVideoCodecH264 = 0
MXDReplayBufferVideoCodecHEVC = 1

Typedefs

typedef void (^MXDReplayBufferSaveCompletion)(NSURL *_Nullable outputURL, NSError *_Nullable error);

MXDReplayBufferRecorderDelegate Protocol

replayBufferRecorderDidStart:

- (void)replayBufferRecorderDidStart:(MXDReplayBufferRecorder *)recorder;

Kind	Delegate / protocol callback
Return	`void`
Details	Callback invoked by MiXiD for replayBufferRecorderDidStart. Implement this method to observe lifecycle, media output, status, or error events.
Parameters	`replayBufferRecorderDidStart` (`MXDReplayBufferRecorder *`, recorder)
Swift usage	`instance.replayBufferRecorderDidStart(replayBufferRecorderDidStart: recorder)`

replayBufferRecorderDidStop:

- (void)replayBufferRecorderDidStop:(MXDReplayBufferRecorder *)recorder;

Kind	Delegate / protocol callback
Return	`void`
Details	Callback invoked by MiXiD for replayBufferRecorderDidStop. Implement this method to observe lifecycle, media output, status, or error events.
Parameters	`replayBufferRecorderDidStop` (`MXDReplayBufferRecorder *`, recorder)
Swift usage	`instance.replayBufferRecorderDidStop(replayBufferRecorderDidStop: recorder)`

replayBufferRecorder:didFailWithError:

- (void)replayBufferRecorder:(MXDReplayBufferRecorder *)recorder didFailWithError:(NSError *)error;

Kind	Delegate / protocol callback
Return	`void`
Details	Callback invoked by MiXiD for replayBufferRecorder didFailWithError. Implement this method to observe lifecycle, media output, status, or error events.
Parameters	`replayBufferRecorder` (`MXDReplayBufferRecorder `, recorder); `didFailWithError` (`NSError `, error)
Swift usage	`instance.replayBufferRecorder(replayBufferRecorder: recorder, didFailWithError: nil)`

replayBufferRecorder:didUpdateStatus:

- (void)replayBufferRecorder:(MXDReplayBufferRecorder *)recorder didUpdateStatus:(NSString *)status;

Kind	Delegate / protocol callback
Return	`void`
Details	Callback invoked by MiXiD for replayBufferRecorder didUpdateStatus. Implement this method to observe lifecycle, media output, status, or error events.
Parameters	`replayBufferRecorder` (`MXDReplayBufferRecorder `, recorder); `didUpdateStatus` (`NSString `, status)
Swift usage	`instance.replayBufferRecorder(replayBufferRecorder: recorder, didUpdateStatus: "value")`

replayBufferRecorder:didSaveReplayToURL:

- (void)replayBufferRecorder:(MXDReplayBufferRecorder *)recorder didSaveReplayToURL:(NSURL *)outputURL;

Kind	Delegate / protocol callback
Return	`void`
Details	Callback invoked by MiXiD for replayBufferRecorder didSaveReplayToURL. Implement this method to observe lifecycle, media output, status, or error events.
Parameters	`replayBufferRecorder` (`MXDReplayBufferRecorder `, recorder); `didSaveReplayToURL` (`NSURL `, outputURL)
Swift usage	`instance.replayBufferRecorder(replayBufferRecorder: recorder, didSaveReplayToURL: url)`

MXDReplayBufferRecorder

Name	Declaration	Details
`delegate`	`@property (nonatomic, weak, nullable) id<MXDReplayBufferRecorderDelegate> delegate;`	Receives lifecycle, media output, status, or error callbacks.
`recording`	`@property (nonatomic, assign, readonly, getter=isRecording) BOOL recording;`	Read-only runtime state flag.
`bufferedDuration`	`@property (nonatomic, assign, readonly) NSTimeInterval bufferedDuration;`	Public configuration or state exposed by this API.
`bufferedByteCount`	`@property (nonatomic, assign, readonly) NSUInteger bufferedByteCount;`	Public configuration or state exposed by this API.
`previewBufferedByteCount`	`@property (nonatomic, assign, readonly) NSUInteger previewBufferedByteCount;`	Public configuration or state exposed by this API.
`configuration`	`@property (nonatomic, strong, readonly) MXDReplayBufferRecorderConfiguration *configuration;`	Public configuration or state exposed by this API.

initWithConfiguration:

- (instancetype)initWithConfiguration:(nullable MXDReplayBufferRecorderConfiguration *)configuration NS_DESIGNATED_INITIALIZER;

Kind	Instance method
Return	`instancetype`
Details	Initializes the receiver for initWithConfiguration. Use this to provide required URLs, ports, names, peer connections, or configuration objects.
Parameters	`initWithConfiguration` (`nullable MXDReplayBufferRecorderConfiguration *`, configuration)
Swift usage	`let value = MXDReplayBufferRecorder(initWithConfiguration: configuration)`

init

- (instancetype)init;

Kind	Instance method
Return	`instancetype`
Details	Initializes the receiver for init. Use this to provide required URLs, ports, names, peer connections, or configuration objects.
Parameters	No parameters.
Swift usage	`let value = MXDReplayBufferRecorder()`

start

- (void)start;

Kind	Instance method
Return	`void`
Details	Starts the component and begins the related capture, server, playback, publish, recording, or discovery workflow.
Parameters	No parameters.
Swift usage	`instance.start()`

stop

- (void)stop;

Kind	Instance method
Return	`void`
Details	Stops the component and releases or finalizes active workflow resources.
Parameters	No parameters.
Swift usage	`instance.stop()`

saveReplayToURL:completion:

- (void)saveReplayToURL:(NSURL *)outputURL completion:(nullable MXDReplayBufferSaveCompletion)completion;

Kind	Instance method
Return	`void`
Details	Writes buffered media to the specified output URL and reports completion asynchronously.
Parameters	`saveReplayToURL` (`NSURL *`, outputURL); `completion` (`nullable MXDReplayBufferSaveCompletion`, completion)
Swift usage	`instance.saveReplayToURL(saveReplayToURL: url, completion: completion)`

saveReplayToURL:durationSeconds:completion:

- (void)saveReplayToURL:(NSURL *)outputURL durationSeconds:(NSTimeInterval)durationSeconds completion:(nullable MXDReplayBufferSaveCompletion)completion;

Kind	Instance method
Return	`void`
Details	Writes buffered media to the specified output URL and reports completion asynchronously.
Parameters	`saveReplayToURL` (`NSURL *`, outputURL); `durationSeconds` (`NSTimeInterval`, durationSeconds); `completion` (`nullable MXDReplayBufferSaveCompletion`, completion)
Swift usage	`instance.saveReplayToURL(saveReplayToURL: url, durationSeconds: 0.0, completion: completion)`

previewFrameForLookbackSeconds:

- (nullable MXDReplayBufferPreviewFrame *)previewFrameForLookbackSeconds:(NSTimeInterval)secondsBack;

Kind	Instance method
Return	`nullable MXDReplayBufferPreviewFrame *`
Details	Returns derived state, buffered data, preview information, or available source metadata from the component.
Parameters	`previewFrameForLookbackSeconds` (`NSTimeInterval`, secondsBack)
Swift usage	`let result = instance.previewFrameForLookbackSeconds(previewFrameForLookbackSeconds: 0.0)`

clearPreviewFrames

- (void)clearPreviewFrames;

Kind	Instance method
Return	`void`
Details	Performs the clearPreviewFrames operation on this MiXiD component.
Parameters	No parameters.
Swift usage	`instance.clearPreviewFrames()`

appendVideoFrame:presentationTime:

- (void)appendVideoFrame:(CVImageBufferRef)imageBuffer presentationTime:(CMTime)presentationTime;

Kind	Instance method
Return	`void`
Details	Appends media into the component. Use presentation timestamps and matching stream configuration so downstream encoders, mixers, or recorders stay synchronized.
Parameters	`appendVideoFrame` (`CVImageBufferRef`, imageBuffer); `presentationTime` (`CMTime`, presentationTime)
Swift usage	`instance.appendVideoFrame(appendVideoFrame: imageBuffer, presentationTime: 0.0)`

appendAudioBuffer:

- (void)appendAudioBuffer:(AVAudioPCMBuffer *)audioBuffer;

Kind	Instance method
Return	`void`
Details	Appends media into the component. Use presentation timestamps and matching stream configuration so downstream encoders, mixers, or recorders stay synchronized.
Parameters	`appendAudioBuffer` (`AVAudioPCMBuffer *`, audioBuffer)
Swift usage	`instance.appendAudioBuffer(appendAudioBuffer: audioBuffer)`

appendAACAccessUnit:sampleRate:channels:objectType:config:

- (void)appendAACAccessUnit:(NSData *)accessUnit sampleRate:(Float64)sampleRate channels:(UInt32)channels objectType:(UInt32)objectType config:(NSData * _Nullable)config;

Kind	Instance method
Return	`void`
Details	Appends media into the component. Use presentation timestamps and matching stream configuration so downstream encoders, mixers, or recorders stay synchronized.
Parameters	`appendAACAccessUnit` (`NSData `, accessUnit); `sampleRate` (`Float64`, sampleRate); `channels` (`UInt32`, channels); `objectType` (`UInt32`, objectType); `config` (`NSData _Nullable`, config)
Swift usage	`instance.appendAACAccessUnit(appendAACAccessUnit: data, sampleRate: 0.0, channels: channels, objectType: objectType, config: data)`

MXDReplayBufferRecorderConfiguration

Name	Declaration	Details
`durationSeconds`	`@property (nonatomic, assign) NSTimeInterval durationSeconds;`	Public configuration or state exposed by this API.
`maxMemoryBytes`	`@property (nonatomic, assign) NSUInteger maxMemoryBytes;`	Public configuration or state exposed by this API.
`videoWidth`	`@property (nonatomic, assign) NSInteger videoWidth;`	Video encoding or rendering configuration.
`videoHeight`	`@property (nonatomic, assign) NSInteger videoHeight;`	Video encoding or rendering configuration.
`videoFPS`	`@property (nonatomic, assign) NSInteger videoFPS;`	Video encoding or rendering configuration.
`videoCodec`	`@property (nonatomic, assign) MXDReplayBufferVideoCodec videoCodec;`	Public configuration or state exposed by this API.
`minVideoBitrateBps`	`@property (nonatomic, assign) NSInteger minVideoBitrateBps;`	Video encoding or rendering configuration.
`maxVideoBitrateBps`	`@property (nonatomic, assign) NSInteger maxVideoBitrateBps;`	Video encoding or rendering configuration.
`keyframeIntervalSeconds`	`@property (nonatomic, assign) NSTimeInterval keyframeIntervalSeconds;`	Public configuration or state exposed by this API.
`segmentDurationSeconds`	`@property (nonatomic, assign) NSTimeInterval segmentDurationSeconds;`	Public configuration or state exposed by this API.
`previewEnabled`	`@property (nonatomic, assign) BOOL previewEnabled;`	Public configuration or state exposed by this API.
`previewFPS`	`@property (nonatomic, assign) NSInteger previewFPS;`	Video encoding or rendering configuration.
`previewJPEGQuality`	`@property (nonatomic, assign) CGFloat previewJPEGQuality;`	Public configuration or state exposed by this API.
`maxPreviewMemoryBytes`	`@property (nonatomic, assign) NSUInteger maxPreviewMemoryBytes;`	Public configuration or state exposed by this API.

defaultConfiguration

+ (instancetype)defaultConfiguration;

Kind	Class method
Return	`instancetype`
Details	Creates, discovers, or returns shared information for defaultConfiguration. Call this on the class before creating or configuring an instance.
Parameters	No parameters.
Swift usage	`let result = MXDReplayBufferRecorderConfiguration.defaultConfiguration()`

MXDReplayBufferPreviewFrame

Name	Declaration	Details
`hostTime`	`@property (nonatomic, assign, readonly) CFTimeInterval hostTime;`	Public configuration or state exposed by this API.
`jpegData`	`@property (nonatomic, copy, readonly) NSData *jpegData;`	Public configuration or state exposed by this API.
`sourceSize`	`@property (nonatomic, assign, readonly) CGSize sourceSize;`	Public configuration or state exposed by this API.
`cleanSize`	`@property (nonatomic, assign, readonly) CGSize cleanSize;`	Public configuration or state exposed by this API.
`previewSize`	`@property (nonatomic, assign, readonly) CGSize previewSize;`	Public configuration or state exposed by this API.
`byteCount`	`@property (nonatomic, assign, readonly) NSUInteger byteCount;`	Public configuration or state exposed by this API.

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