Opened 6 years ago
Closed 6 years ago
#7254 closed enhancement (fixed)
ffmpeg h264_qsv encoder can not output QP to evaluate encoding quality
| Reported by: | Jianhui | Owned by: | |
|---|---|---|---|
| Priority: | wish | Component: | avcodec |
| Version: | git-master | Keywords: | qsv |
| Cc: | Blocked By: | ||
| Blocking: | Reproduced by developer: | no | |
| Analyzed by developer: | no |
Description
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
Change History (4)
comment:1 by , 6 years ago
comment:2 by , 6 years ago
| Keywords: | encoder PSNR QP removed |
|---|---|
| Priority: | normal → wish |
comment:4 by , 6 years ago
| Resolution: | → fixed |
|---|---|
| Status: | new → closed |
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PNSR is not supported by Intel MSDK. QP is supported by lastest MSDK now(see: https://github.com/Intel-Media-SDK/MediaSDK/commit/f7ba75123290cb09b50f683f9c06363370eff341). Will add this in ffmpeg level.