AVBufferRef for internal use by a single libav* library.
Must not be used to transfer data between libraries.
Has to be NULL when ownership of the frame leaves the respective library.
Code outside the FFmpeg libs should never check or change the contents of the buffer ref.
FFmpeg calls av_buffer_unref() on it when the frame is unreferenced.
av_frame_copy_props() calls create a new reference with av_buffer_ref()
for the target frame's private_ref field.
AVBufferRef for internal use by a single libav* library. Must not be used to transfer data between libraries. Has to be NULL when ownership of the frame leaves the respective library.
Code outside the FFmpeg libs should never check or change the contents of the buffer ref.
FFmpeg calls av_buffer_unref() on it when the frame is unreferenced. av_frame_copy_props() calls create a new reference with av_buffer_ref() for the target frame's private_ref field.