transcode: add CBR/VBR/QP rate control + more x264 presets

Player/transcoding settings gain encoder controls:
- Rate-control mode VBR / CBR / QP (constant quantizer). x264: VBR uses
  -b:v/-maxrate/-bufsize, CBR adds -x264-params nal-hrd=cbr (min=max=b:v),
  QP uses -qp N (no bitrate). VP9 maps QP -> -crf N -b:v 0, CBR -> min=max=b:v.
- Preset list expanded to ultrafast/superfast/veryfast/faster/fast/medium
  (was only ultrafast/superfast); for VP9 the preset maps to cpu-used.
- New QP field in the UI, shown when rate control = QP, otherwise the
  bitrate field is shown.

Both /play.mp4 (archive) and /live.mp4 accept rc + qp query params.
All three modes verified producing valid output on the live restream.
VERSION -> 0.0.119.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

This commit is contained in:

core

2026-06-01 16:38:04 +05:00

parent 5828873910

commit c876a46e61

5 changed files with 90 additions and 33 deletions

VERSION

+1 -1

View File

@@ -1 +1 @@
 .0.118
 .0.119