Tested: sync.so Lip-Sync Workflow in ComfyUI — Setup, Pricing and Pitfalls
Madmahi25 · reddit · 2026-11-14
A hands-on walkthrough of using sync.so for lip-sync inside ComfyUI. Two routes: ComfyUI's built-in sync.so Lip Sync node (runs sync-3) and sync.so's custom node pack (lipsync-2, lipsync-2-pro, lipsync-1.9.0-beta).
10-minute setup: install ComfyUI → add the node pack via Git URL in ComfyUI Manager → paste your sync.so API key → wire video, audio, key into generate → output. Official docs also link a ready-made workflow JSON.
Pricing & limits (25fps): lipsync-2 $0.05/s, lipsync-2-pro $0.083/s, sync-3 $0.133/s; up to 5-10 minutes per generation, so full songs need chunking plus FFmpeg stitching; cutoff mode bills only processed duration; multi-face shots require specifying the speaker; free tier is 3 generations/month at 20s each, with watermarks on Free/Hobbyist plans.
Test: on a 14-second CC-licensed clip, replaced one actor's two lines with synthetic voice — only the speaker's mouth was re-animated, control shots untouched. Pitfalls: force-reinstall a matching torchvision wheel, and copy the full API key (a truncated one fails with 401).
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