Static AVTrackAssociationTypeTimecode 

pub unsafe static AVTrackAssociationTypeTimecode: &'static AVTrackAssociationType

Available on crate feature AVAssetTrack only.

Indicates an association between a track with another track that contains timecode information. The track containing timecode information should be a timecode track.

This association is not symmetric; when used with -[AVAssetWriterInput addTrackAssociationWithTrackOfInput:type:], the receiver should be an instance of AVAssetWriterInput with a corresponding track that may be a video track or an audio track while the input parameter should be an instance of AVAssetWriterInput with a corresponding timecode track.

See also Apple’s documentation