[FFmpeg-devel] [PATCH] H.264: Record slice_qs_delta syntax element

Gwenole Beauchesne gbeauchesne
Sun Dec 20 16:30:55 CET 2009


On Sat, 12 Dec 2009, Michael Niedermayer wrote:

> On Fri, Dec 11, 2009 at 03:25:34PM +0100, Gwenole Beauchesne wrote:
>> Hi,
>> slice_qp_delta and slice_qs_delta values from the bitstream are
>> respectively needed for VAAPI,DXVA and DXVA.
>> The former could be
>> reconstructed with a single subtraction though.
> then i would suggest to do it with a subtraction

This is what we currently do but I felt having both recorded was better 
for consistency. qscale doesn't seem to be altered elsewhere for h264, so 
keeping the subtraction is ok for slice_qp_delta.

Anyway, here is a new patch with only slice_qs_delta.

-------------- next part --------------
A non-text attachment was scrubbed...
Name: ffmpeg.h264.record.slice_qs_delta.patch
Type: text/x-diff
Size: 1154 bytes
URL: <http://lists.mplayerhq.hu/pipermail/ffmpeg-devel/attachments/20091220/178664a2/attachment.patch>

More information about the ffmpeg-devel mailing list