Expected input format to iOS HW decoder:
1) Does iOS HW decoder support NAL type 9 ? If so, is it expected to be present at the end or at the beginning of each input buffer fed to HW decoder?
2) can it be fed as an independent standalone buffer to HW decoder?
3) Does iOS HW encoder produce NAL type 9? what is the default setting? is it possible to disable NAL 9 generation at configuration time or run time.
