[FFmpeg-trac] #6478(undetermined:new): Intel QSV: H.264 level is ignored

FFmpeg trac at avcodec.org
Thu Jun 22 01:14:00 EEST 2017

#6478: Intel QSV: H.264 level is ignored
             Reporter:  alexpigment  |                     Type:  defect
               Status:  new          |                 Priority:  normal
            Component:               |                  Version:
  undetermined                       |  unspecified
             Keywords:  intel, qsv,  |               Blocked By:
  level, h264_qsv, h.264             |  Reproduced by developer:  0
             Blocking:               |
Analyzed by developer:  0            |
 Summary of the bug:

 For the h264_qsv encoder, specifying an H.264 level is quietly accepted
 (no errors or warnings) but not honored. Instead, the level is always
 automatically assigned.

 Using Staxrip as a comparison, the Intel H.264 encoder does appear to
 support user-specified levels.

 How to reproduce:

 % ffmpeg -f lavfi -i smptebars -c:v h264_qsv -s 1920x1080 -aspect 16:9
 -profile:v high -r 29.97 -t 5 -look_ahead 0 -level 4.1 output.mp4

 See that the resulting video is reported as Level 4 in MediaInfo rather
 than Level 4.1.

 ffmpeg version N-86330-gbd1179e
 built on 2017-06-01

Ticket URL: <https://trac.ffmpeg.org/ticket/6478>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker

More information about the FFmpeg-trac mailing list