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VTCompressionOutputHandler

A callback for the system to invoke when it’s finished compressing a frame.

Declaration

typealias VTCompressionOutputHandler = @Sendable (OSStatus, VTEncodeInfoFlags, CMSampleBuffer?) -> Void

Parameters

  • status:

    noErr if compression was successful; an error code if compression was not successful.

  • infoFlags:

    Contains information about the encode operation.

    The Asynchronous bit may be set if the encode ran asynchronously.

    The Framedropped bit may be set if the frame was dropped.

  • sampleBuffer:

    Contains the compressed frame if compression was successful and the frame was not dropped; otherwise, NULL.

Discussion

When you encode a frame, you pass in a callback block to be called for that compressed frame. This block is called in decode order (which is not necessarily the same as display order).

See Also

Callbacks