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| author | Dennis Fink | 2026-05-08 22:16:51 +0200 |
|---|---|---|
| committer | Dennis Fink | 2026-05-08 22:16:51 +0200 |
| commit | 4b5967b1fde15f0d7d677274f1ae353915e6854b (patch) | |
| tree | 678962fff66a97789386b298cdb6c8e8cb1c13bf /README.md | |
| parent | d3ee4e3e82ea5433e467331a2605675be2a60c9f (diff) | |
| download | transcode.sh-4b5967b1fde15f0d7d677274f1ae353915e6854b.tar.gz transcode.sh-4b5967b1fde15f0d7d677274f1ae353915e6854b.zip | |
feat(core): expose frame-rate variables to presets
Add input_frame_rate, input_fps, and output_gop_size to the set of
variables available to preset files at source time.
input_frame_rate is the raw ffprobe fraction (e.g. 30000/1001).
input_fps rounds that fraction to the nearest integer via awk.
output_gop_size is derived as roughly five seconds of video (input_fps *
5), capped at 300 frames.
The ffprobe invocation is extended to request r_frame_rate alongside the
existing codec_name and pix_fmt entries; a missing frame rate is now
treated as a hard error. Dry-run and verbose output are updated to
display the new values. Documentation (header comment, --help text, man
page, README) is updated accordingly.
Diffstat (limited to '')
| -rw-r--r-- | README.md | 3 |
1 files changed, 3 insertions, 0 deletions
@@ -85,6 +85,9 @@ The following variables are available to presets at source time: | `input_codec` | Video codec of the input file (e.g. `h264`, `hevc`) | | `input_pixel_format` | Pixel format of the input after `yuvj*` normalisation (e.g. `yuv420p`) | | `output_pixel_format` | Recommended output pixel format, derived from the input to preserve chroma subsampling and bit depth | +| `input_frame_rate` | Raw frame rate fraction of the input file as reported by `ffprobe` (e.g. `30000/1001`, `25/1`) | +| `input_fps` | `input_frame_rate` rounded to the nearest integer (e.g. `30`, `25`, `60`) | +| `output_gop_size` | Recommended GOP size derived from `input_fps` (≈ 5 s of video, capped at 300 frames) | Before the preset's `ffargs` are appended, the script always passes these base arguments to `ffmpeg`: |