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batch-lipsync

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Lip-sync many videos at once with sync. labs (sync.so), from a CSV, spreadsheet, folder or list. Pairs each video or avatar with its own audio or script, quotes the whole run, works within the plan's concurrency limit or uses the Batch API, resumes safely without paying twice, and collects every output. Use for bulk or batch lipsync of supplied audio or scripts, personalized video at scale (one video per lead, customer or recipient name), ad and creative variants, many voiceovers onto one presenter, or any "do this for each row" lipsync job. Not for one video (lipsync), translating videos into other languages (translate-and-dub for one video, localize-campaign for several).

skills/batch-lipsync/SKILL.md

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Nov 10, 2026
License
MIT

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# Lipsync many videos

Delivers one MP4 per row of the user's list, plus a results table that maps each row to its output.

If no sync. tools are available and there's no `SYNC_API_KEY`, follow [references/connect.md](references/connect.md) first.

## 1. Build the manifest

Turn whatever the user gave you (a CSV, a spreadsheet, a folder of files, "this video with each of these 30 audio files") into a CSV in the working directory, one row per output video:

| Column | Meaning |
| --- | --- |
| `id` | A unique, stable row name, such as `lead-042` or `es-ad1`. It names the output and keys retries. |
| `video` | A local path, `https://` URL or sync. asset ID. Use `image` instead for a still picture (sync-3). |
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