AVAssetWriterInput.CaptionReceiver Provides an interface for writing caption data to an input. Declarationclass CaptionReceiver TopicsAppending captionsappend(_:)append(_:)appendImmediately(_:)appendImmediately(_:)finish() See AlsoAppending media samplesexpectsMediaDataInRealTimeisReadyForMoreMediaDatarequestMediaDataWhenReady(on:using:)append(_:)markAsFinished()AVAssetWriterInput.SampleBufferReceiverAVAssetWriterInput.PixelBufferReceiverAVAssetWriterInput.TaggedPixelBufferGroupReceiverAVAssetWriterInput.MetadataReceiver