[j-clavoie]

Summary

Updates HEVC NVENC support to match current FFmpeg/NVENC options.

Changes

• Add MKV support for hevc_nvenc
• Add modern NVENC presets p1 through p7
• Add NVENC tuning modes
• Add HEVC NVENC rate-control modes:
  • VBR / CQ
  • CBR
  • Constant QP
• Add multipass support
• Add HEVC profiles, levels and tiers
• Add advanced NVENC options:
  • lookahead
  • spatial AQ
  • temporal AQ
  • AQ strength
  • B-frame references
  • zero latency
  • strict GOP
  • scene-cut control
  • adaptive B-frames
  • weighted prediction
  • GPU selection
• Add field help for the new controls
• Extend field-help tests for conditional HEVC NVENC controls

Validation

• npm test
• npm run lint
• npm run build

Manually verified generated commands for VBR, CBR, Constant QP, multipass, AQ, lookahead, profiles, levels, tiers and GPU selection.

[alfg]

Hi @j-clavoie, thanks for putting this together! You're right that the NVENC options were out of date. The old hp/hq/bd/lossless presets are gone from current FFmpeg, and P1–P7 with tunes and -rc/-cq are how NVENC works now.

While reviewing I realised I wanted it structured a bit differently, so I've opened #63 based on your approach. The main differences:

• It covers both h264_nvenc and hevc_nvenc, since they share almost all of these options.
• It reuses the existing Rate control field and CRF slider instead of adding a parallel set. Constant quality becomes -rc vbr -cq, and CBR and constant QP are added as NVENC modes. Separate fields had led to a few sync bugs: the ffmpegd payload and shared links were missing the NVENC settings, and a hidden 2 Pass setting could still produce a two-command encode.
• It trims the settings to the ones most people will change: presets, tunes, rate control, Multipass, adaptive quantization and lookahead.
• Old links and saved presets that use the legacy preset names are converted to the P preset FFmpeg ran them as, so they keep encoding the same way.

You're credited as a co-author on the commit in #63. Since that PR replaces this one, I'll close this one once it merges. Thanks again, and I'd welcome your review on #63, especially if you can test it against a real NVENC setup.

[j-clavoie]

Hello!
I made some test with re-encoding some videos with NVENC (nvidia video card), I used the ffmpeg-commander.
That works very well.

I took a look at the commit #63 and it's really good. I used it in my Dockerfile to test it and that works well.

I'm just curious when it's planned to push your commit #63 in the main branch.

[alfg]

Hey @j-clavoie, it should be merged and deployed to the website. Feel free to check it out.

Closing this PR.