init(videoCodecType:encoderSpecification:mediaType:segmentConfigurations:assemblyTrackID:)

Declaration

convenience init(videoCodecType: AVVideoCodecType, encoderSpecification: [String : any Sendable]? = nil, mediaType: AVMediaType, segmentConfigurations: [AVPlannedVideoSegmentConfiguration], assemblyTrackID: CMPersistentTrackID)

Parameters

• videoCodecType:

  Video codec type of the track.

• encoderSpecification:

  A dictionary describing the characteristics of a video encoder to use. Pass nil to let the system choose an encoder. If the client provides a specification, it should omit the following keys: kVTCompressionPropertyKey_SourceFrameCount, kVTCompressionPropertyKey_MoreFramesBeforeStart, and kVTCompressionPropertyKey_MoreFramesAfterEnd, since such keys will be overwritten by the underlying implementation.

• mediaType:

  Media type of the track. Only AVMediaTypeVideo and AVMediaTypeAuxiliaryPicture are supported.

• segmentConfigurations:

  Segment configurations of the track.

• assemblyTrackID:

  The trackID that identifies this track in the assemblyComposition the planner passes to the completion handler of the incremental writing session.

Discussion

This initializer throws NSInvalidArgumentException in the following cases:

1. mediaType is not supported. Supported media types are AVMediaTypeVideo and AVMediaTypeAuxiliaryPicture

2. The encoder specified by videoCodecType and encoderSpecification does not support video encoding in segments