[FFmpeg-trac] #8328(undetermined:new): QSV gives much worse PSNR/SSIM for HEVC transcode than VA-API or MediaSDK

FFmpeg trac at avcodec.org
Thu Oct 24 15:32:16 EEST 2019


#8328: QSV gives much worse PSNR/SSIM for HEVC transcode than VA-API or MediaSDK
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             Reporter:  eero-t       |                    Owner:
                 Type:  defect       |                   Status:  new
             Priority:  normal       |                Component:
                                     |  undetermined
              Version:  unspecified  |               Resolution:
             Keywords:               |               Blocked By:
             Blocking:               |  Reproduced by developer:  0
Analyzed by developer:  0            |
-------------------------------------+-------------------------------------

Comment (by eero-t):

 Upload size limit forced me to clip the attached video to first 7 frames.
 Shorter video reduces the quality gap between QSV & VA-API from 25 vs 40+
 PSNR to 28 vs 31 PSNR.

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Ticket URL: <https://trac.ffmpeg.org/ticket/8328#comment:5>
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