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AVAssetWriterMBS class

Type Topic Plugin Version macOS Windows Linux Console & Web iOS
class AVFoundation MBS AVFoundation Plugin 13.2 Yes No No Yes, macOS only No
Function: You use an AVAssetWriter object to write media data to a new file of a specified audiovisual container type, such as a QuickTime movie file or an MPEG-4 file, with support for automatic interleaving of media data for multiple concurrent tracks.
Notes:
You can get the media data for one or more assets from instances of AVAssetReader or even from outside the AV Foundation API set. Media data is presented to AVAssetWriter for writing in the form of CMSampleBuffers. Sequences of sample data appended to the asset writer inputs are considered to fall within "sample-writing sessions." You must call startSessionAtSourceTime to begin one of these sessions.

Using AVAssetWriter, you can optionally re-encode media samples as they are written. You can also optionally write metadata collections to the output file.

You can only use a given instance of AVAssetWriter once to write to a single file. If you want to write to files multiple times, you must use a new instance of AVAssetWriter each time.

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Status Constants

Constant Value Description
AVAssetWriterStatusCancelled 4 Cancelled
AVAssetWriterStatusCompleted 2 Completed
AVAssetWriterStatusFailed 3 Failed
AVAssetWriterStatusUnknown 0 Unknown
AVAssetWriterStatusWriting 1 Writing

This class has no sub classes.

Some events for this class:

Some examples which use this class:


The items on this page are in the following plugins: MBS AVFoundation Plugin.


AVAssetWriterInputPixelBufferAdaptorMBS   -   AVAsynchronousVideoCompositionRequestMBS




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