By name: srt-from-script description: "Build an SRT subtitle file from a 3-shot short-drama script (ai-video-script OUTPUT FORMAT). Reads each SHOT_N block's DURATION_S + VOICEOVER, emits cumulative-timestamped SRT cues. Pure text-processing, no LLM, no network. Used by meta-short-drama between merge and the final subtitle-burn step." provenance: origin: opensquilla-original license: Apache-2.0 metadata: opensquilla: risk: low capabilities: [filesystem-write] requires: anyBins: ["python", "python3"] entrypoint: command: python {baseDir}/scripts/build_srt.py args: - --output - "{{ with.output_path }}" - --gap-ms - "{{ with.gap_ms | default(200) }}" - --leading-offset-ms - "{{ with.leading_offset_ms | default(0) }}" stdin: "{{ with.script }}" parse: text
timeout: 30
srt-from-script
Parses an ai-video-script 3-shot script and writes an SRT subtitle file whose cues track the script's VOICEOVER per shot, time-coded with cumulative shot durations.
Inputs (with:)
| key | required | default | notes |
|---|---|---|---|
script |
yes | — | Full script text (the entire OUTPUT FORMAT block, including OVERVIEW + SHOT_1..N). Passed via stdin so the orchestrator does not need to write a temp file. |
output_path |
yes | — | Output .srt path. Parent dir created if missing. |
gap_ms |
no | 200 |
Tail pad subtracted from each cue's end so the subtitle vanishes ~200 ms before the next shot starts — avoids cuts clipping mid-character. |
leading_offset_ms |
no | 0 |
Shifts every cue forward by this many ms. Set to the cover/intro clip duration when the merged video prepends a title card before SHOT_1. |
Parsing rules
- A shot with
VOICEOVER: noneor empty contributes no SRT cue but itsDURATION_Sstill advances the timeline cursor. - Cue language follows the script verbatim. Chinese stays Chinese, English stays English — no translation.
- Cumulative timestamps: SHOT_1 starts at 00:00:00,000; SHOT_2 starts at SHOT_1.duration; etc.
- End time of each cue = next-shot start −
gap_ms, clamped to ≥ 800 ms after start so very short voiceover lines remain readable.
Output
Prints the absolute path of the written .srt on stdout.
The file is UTF-8 encoded so CJK voiceover lines survive when ffmpeg
reads them via the subtitles= filter.
Limits
- Assumes the script follows ai-video-script's strict OUTPUT FORMAT
(
=== SHOT_N ===blocks withDURATION_S:andVOICEOVER:fields). Drift away from that format → zero cues, exit 1. - 3-5 shots tested. Larger shot counts work but timestamps grow.