Update presets for NVENC encoder

[nyanmisaka]

Changes

• Use p1 to p7 presets on NVENC encoder for more fine tuning options.

Issues
https://www.reddit.com/r/jellyfin/comments/t2oxl6/h264_nvenc_encoding/

[github-actions]

Changes in OpenAPI specification found. Expand to see details.

What's New

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POST /Plugins/SecurityInfo

Updates plugin security info.

[TheTyrius]

Hi excuse me asking this here, but reading about the p1-p7 presets I was wondering what "tuning info" (https://docs.nvidia.com/video-technologies/video-codec-sdk/nvenc-video-encoder-api-prog-guide/#encoder-tuning-info-and-preset-configurations) jellyfin was using for NVENC. According to the docs this should probably be "high quality" for transcoding. I was unable to locate such in the source, is it set somewhere (and I missed it?) or does it fallback to some default (I didn't find such in the docs, but I would guess hq is the default anyway, as low latency/lossless are more specialized by their nature). Since you had a look at the profiles, do you have any insights regarding the tuning?

[nyanmisaka]

Hi excuse me asking this here, but reading about the p1-p7 presets I was wondering what "tuning info" (https://docs.nvidia.com/video-technologies/video-codec-sdk/nvenc-video-encoder-api-prog-guide/#encoder-tuning-info-and-preset-configurations) jellyfin was using for NVENC. According to the docs this should probably be "high quality" for transcoding. I was unable to locate such in the source, is it set somewhere (and I missed it?) or does it fallback to some default (I didn't find such in the docs, but I would guess hq is the default anyway, as low latency/lossless are more specialized by their nature). Since you had a look at the profiles, do you have any insights regarding the tuning?

  -preset            <int>        E..V....... Set the encoding preset (from 0 to 18) (default p4)
     default         0            E..V.......
     slow            1            E..V....... hq 2 passes
     medium          2            E..V....... hq 1 pass
     fast            3            E..V....... hp 1 pass
     hp              4            E..V.......
     hq              5            E..V.......
     bd              6            E..V.......
     ll              7            E..V....... low latency
     llhq            8            E..V....... low latency hq
     llhp            9            E..V....... low latency hp
     lossless        10           E..V.......
     losslesshp      11           E..V.......
     p1              12           E..V....... fastest (lowest quality)
     p2              13           E..V....... faster (lower quality)
     p3              14           E..V....... fast (low quality)
     p4              15           E..V....... medium (default)
     p5              16           E..V....... slow (good quality)
     p6              17           E..V....... slower (better quality)
     p7              18           E..V....... slowest (best quality)
  -tune              <int>        E..V....... Set the encoding tuning info (from 1 to 4) (default hq)
     hq              1            E..V....... High quality
     ll              2            E..V....... Low latency
     ull             3            E..V....... Ultra low latency
     lossless        4            E..V....... Lossless

https://github.com/FFmpeg/nv-codec-headers/blob/84483da70d903239d4536763fde8c7e6c4e80784/include/ffnvcodec/nvEncodeAPI.h#L203-L270

https://github.com/FFmpeg/FFmpeg/blob/316e0ff752c782439843cc63d0eb8b9c998e47de/libavcodec/nvenc.c#L164-L202

ffmpeg has default "hq" as tuning info and we leave it as is since it's sufficient for our use case.

[TheTyrius]

I see, thank you!