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applemedia: expose GstCoreMediaMeta to app

Submitted by Ilya Konstantinov

Assigned to Ilya Konstantinov

Link to original bug (#747707)

Description

An OS X and iOS app might use appsink to get resulting GstBuffers from a pipeline containing applemedia elements. Furthermore, it can wish to access (and retain) the underlying CMSampleBufferRef or CMPixelBufferRef, as they're needed:

  1. to work with AVFoundation, Core Video and Core Image

  2. for GL rendering done by app

How can we expose some of the applemedia stuff (e.g. coremediabuffer.h) as API?

Depends on