Audio specific properties in a reference to an AVFilterBuffer. Since AVFilterBufferRef is common to different media formats, audio specific per reference properties must be separated out.
< channel layout of audio buffer
< number of channels (do not access directly)
< number of audio samples per channel
< audio buffer sample rate
See Implementation
Audio specific properties in a reference to an AVFilterBuffer. Since AVFilterBufferRef is common to different media formats, audio specific per reference properties must be separated out.