AVAssetWriterInputCaptionAdaptor An object that appends captions to an asset writer input. Declarationclass AVAssetWriterInputCaptionAdaptor TopicsCreating a caption adaptorinit(assetWriterInput:)Accessing the writer inputassetWriterInputAppending captionsappend(_:)append(_:) RelationshipsInherits FromNSObjectConforms ToCVarArgCustomDebugStringConvertibleCustomStringConvertibleEquatableHashableNSObjectProtocol See AlsoReading and writingAVAssetReaderOutputCaptionAdaptor