[FFmpeg-trac] #7254(avcodec:new): ffmpeg h264_qsv encoder can not output QP to evaluate encoding quality
FFmpeg
trac at avcodec.org
Mon Jun 11 08:42:42 EEST 2018
#7254: ffmpeg h264_qsv encoder can not output QP to evaluate encoding quality
-------------------------------------+-------------------------------------
Reporter: jianhui | Type:
Status: new | enhancement
Component: avcodec | Priority: normal
Keywords: qsv encoder | Version: git-
PSNR QP | master
Blocking: | Blocked By:
Analyzed by developer: 0 | Reproduced by developer: 0
-------------------------------------+-------------------------------------
Summary of the bug:
I use ffmpeg h264_qsv to do transcoding, and want to get the PSNR or QP
after transcoding to evaluate encoding quality. Once the PSNR or QP is too
low, I will change coding parameter to re-transcoding to meet the minimum
quality requirement.
But both PSNR and QP are not supported by latest h264_qsv.
How to reproduce:
ffmpeg -i input -codec h264_qsv -psnr out.mp4
--
Ticket URL: <https://trac.ffmpeg.org/ticket/7254>
FFmpeg <https://ffmpeg.org>
FFmpeg issue tracker
More information about the FFmpeg-trac
mailing list