[FFmpeg-devel] [PATCH] libavcodec/qsvdec_h264.c bug fixed: decoder fails after restart on non-annex-b content.

Ivan Uskov ivan.uskov at nablet.com
Sat Jul 25 18:00:00 CEST 2015

Hello Michael,

Saturday, July 25, 2015, 6:14:20 PM, you wrote:

>> I can implement necessary functions to generate annex-b prefixes just into
>> libavcodec/qsvdec_h264.c if Michael will agree this way.

MN> would this be faster ?
MN> avoid a copy/malloc ?
If it implemented inside libavcodec/qsvdec_h264.c then it will use
about same code like current bsf implementation uses but with using of
private buffer for sps/pps instead public extradata buf using.

Here can  be the trick to write SPS/PPS directly to
QSVContext::input_fifo which implemented recently into qsvdec.
It will not solve memory copying necessity but it will solve possible twice memory
copying issue when packet re-allocation perform into mp4toannexb filter then
data copies again into input_fifo since qsv decoder did not consume
previous packet in full. What do you think?

Best regards,
 Ivan                            mailto:ivan.uskov at nablet.com

More information about the ffmpeg-devel mailing list