[FFmpeg-trac] #4831(avcodec:reopened): Can't initialize h264_qsv encoder post Aug 29 2015 - Ivy Bridge CPU

[FFmpeg]

#4831: Can't initialize h264_qsv encoder post Aug 29 2015 - Ivy Bridge CPU
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             Reporter:  babgvant     |                    Owner:  IvUs
                 Type:  defect       |                   Status:  reopened
             Priority:  important    |                Component:  avcodec
              Version:  git-master   |               Resolution:
             Keywords:  qsv          |               Blocked By:
  regression                         |  Reproduced by developer:  0
             Blocking:               |
Analyzed by developer:  1            |
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Comment (by IvUs):

 Replying to [comment:36 heleppkes]:
 > LA should give improved quality, so if we can figure out how to detect
 hardware support, turning it on there would be the best choice, wouldn't
 it?
 I believe we can left it to user's choice. Of course LA mode looks better
 but for this case I believe the compatibility is more important than
 quality.
 I believe it is bad idea to use different rate control modes depending by
 hardware because same command line on different hardware will produce
 different output. It is not good.
 And for any case to quality encoding it is necessary to set a rich command
 line where LA can be activated additionally too.

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Ticket URL: <https://trac.ffmpeg.org/ticket/4831#comment:37>
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