[FFmpeg-trac] #9377(undetermined:new): QSV MPEG2 => H264 transcode PSNR dropped by 32%

FFmpeg trac at avcodec.org
Fri Oct 29 09:21:47 EEST 2021


#9377: QSV MPEG2 => H264 transcode PSNR dropped by 32%
-------------------------------------+-------------------------------------
             Reporter:  eero-t       |                    Owner:  (none)
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:
                                     |  undetermined
              Version:  git-master   |               Resolution:
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------
Comment (by wenbin,chen):

 I add "-vsync passthrough" to command


 {{{
 ffmpeg -hwaccel qsv -qsv_device /dev/dri/renderD128 -c:v mpeg2_qsv -vsync
 passthrough -i 1920x1080i_29.97_20mb_mpeg2_high.mpv -c:v h264_qsv -b:v
 6000K -compression_level 7 -an -vframes 2400 -y 0024_HD17i7_1.0.h264
 }}}

 The psnr drop is unseen.
-- 
Ticket URL: <https://trac.ffmpeg.org/ticket/9377#comment:7>
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