[FFmpeg-trac] #2591(avcodec:open): Feature Request: Add ability to use Quick Sync to transcode video files

[FFmpeg]

#2591: Feature Request:  Add ability to use Quick Sync to transcode video files
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             Reporter:  zjacobs      |                    Owner:
                 Type:  enhancement  |                   Status:  open
             Priority:  wish         |                Component:  avcodec
              Version:  git-master   |               Resolution:
             Keywords:  h264 vaapi   |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
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Comment (by cehoyos):

 Replying to [comment:3 zjacobs]:
 > According to my research and actual use, it may be "worse quality" than
 libx264 but it's faster.  Additionally, it's hard to notice much of a
 difference when transcoding for mobile devices anyway.
 >
 > http://www.anandtech.com/show/5771/the-intel-ivy-bridge-core-i7-3770k-
 review/21

 I did not find any comparison between x264 and QuickSync in this article.
 Did I miss it?

 > http://forum.doom9.org/showthread.php?t=166958

 It is claimed here that x264 Ultrafast is faster than QuickSync.

 http://www.compression.ru/video/codec_comparison/h264_2012/mpeg4_avc_h264_video_codecs_comparison.pdf
 seems to indicate to me that QuickSync has no advantages over x264 but
 maybe your results are different?

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Ticket URL: <https://ffmpeg.org/trac/ffmpeg/ticket/2591#comment:4>
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