[FFmpeg-trac] #7526(undetermined:new): VAAPI HEVC Encoder Bitrate parameter no longer works in Master compared to 4.0.x

FFmpeg trac at avcodec.org
Wed Oct 31 22:49:29 EET 2018


#7526: VAAPI HEVC Encoder Bitrate parameter no longer works in Master compared to
4.0.x
-------------------------------------+-------------------------------------
             Reporter:  jlsantiago0  |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:  git-
  undetermined                       |  master
             Keywords:  vaapi hevc   |               Blocked By:
  encode rate control                |  Reproduced by developer:  0
             Blocking:               |
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
 Summary of the bug:

 In FFMPEG v4.0.2 you could use the -b:v parameter to set the target
 bitrate. And the Video output would reflect the bitrate specified on the
 commandline. That no longer works in git-master. You get rougly the same
 output no matter what you set for the bitrate.

 How to reproduce:
 {{{

 ffmpeg -vaapi_device /dev/dri/renderD128 -i
 /mnt/share/content/yuv/lp/SVT_Park_joy_FR6001_7000_1920x1080p50.avi.yuv.y4m
 -vf 'format=nv12,hwupload' -c:v hevc_vaapi -b:v 2M -g 30 -bf 2 test-vaapi-
 2m.hevc

 ffmpeg -vaapi_device /dev/dri/renderD128 -i
 /mnt/share/content/yuv/lp/SVT_Park_joy_FR6001_7000_1920x1080p50.avi.yuv.y4m
 -vf 'format=nv12,hwupload' -c:v hevc_vaapi -b:v 4M -g 30 -bf 2 test-vaapi-
 4m.hevc

 ffmpeg version N-92314-g323c2cfd38

 Manjaro Linux.
 }}}
 Patches should be submitted to the ffmpeg-devel mailing list and not this
 bug tracker.

--
Ticket URL: <https://trac.ffmpeg.org/ticket/7526>
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