Sync Lipsync 2 on AI Compare Hub

Sync Lipsync 2 is Sync Labs' generative AI video lipsync model — re-animating mouth movements in any existing video to perfectly match a new audio track. Available on AI Compare Hub, Sync Lipsync 2 supports five sync modes, expressive temperature control, and active-speaker detection for multi-person footage, all delivered in cost-effective per-second pricing.

What you can create

• Voiceover replacement and dubbing

  Replace the audio track of an existing video and have Sync Lipsync 2 re-animate the mouth movements to match the new voiceover. Ideal for marketing edits, content updates, and on-the-fly script revisions.

• Multilingual video localisation

  Generate localised versions of the same video in multiple languages. Pair the original footage with translated voiceovers and Sync Lipsync 2 re-renders the mouth shapes for each language.

• Active-speaker re-syncing for interviews

  Process multi-person footage like interviews and panels. Sync Lipsync 2's active-speaker detection identifies who is speaking and re-animates only that person's mouth — no manual masking required.

• Animated character dialogue updates

  Re-sync animated characters and avatars to revised audio without re-rendering the original animation. Sync Lipsync 2 preserves the character's identity and motion while updating only the mouth region.

Why creators choose Sync Lipsync 2

• Generative re-animation, not overlay

  Sync Lipsync 2 generates new mouth frames that blend seamlessly with the original face, rather than overlaying a separate mouth region. The result is a single coherent video without visible seams or masks.

• Five sync modes for any duration mismatch

  Choose loop, bounce, cut_off, silence, or remap to control what happens when audio and video are different lengths. Sync Lipsync 2 gives creators precise control over how the output is composed.

• Active-speaker detection

  Toggle the active_speaker option to detect and lipsync only the person who is speaking in the clip. Sync Lipsync 2 handles multi-person footage automatically — no manual face selection needed.

• Expressiveness temperature control

  The temperature parameter (0–1) controls how expressive the generated lipsync is. Lower values produce subtle, conservative motion; higher values produce more pronounced, performative mouth shapes.

How to generate your first lipsync video

1. Upload your source video. Provide an MP4 file showing the speaker whose mouth should be re-animated. Clear, front-facing footage produces the best results.
2. Upload your replacement audio. Add the WAV audio file containing the new voiceover, dialogue, or speech that should drive the lip movement.
3. Configure and generate. Pick a sync_mode for duration handling, set the expressiveness temperature, optionally enable active-speaker detection, and run Sync Lipsync 2 on AI Compare Hub.

Common questions

What is Sync Lipsync 2?

Sync Lipsync 2 is Sync Labs' generative AI video lipsync model, available via the Replicate API. It takes a source video and a replacement audio file and re-animates the mouth movements to match the new audio. Unlike overlay-based approaches, Sync Lipsync 2 generates new mouth frames that blend seamlessly with the original face, supports five sync modes, and includes active-speaker detection for multi-person footage.

What sync modes does Sync Lipsync 2 support?

Sync Lipsync 2 supports five sync modes that determine how audio/video duration mismatches are handled: loop (default — repeats audio to match video length), bounce (plays audio forward then backward), cut_off (truncates the longer input), silence (pads the shorter input with silence), and remap (stretches one input to match the other).

How is Sync Lipsync 2 different from Sync Lipsync 2 Pro?

Sync Lipsync 2 is the standard tier — fast turnaround at competitive per-second pricing. Sync Lipsync 2 Pro is the studio-grade variant with higher visual fidelity and improved identity preservation, suited for professional broadcast, film, and high-end marketing work. Both models share the same parameters (sync_mode, temperature, active_speaker).

How can you use Sync Lipsync 2 on AI Compare Hub?

To re-animate videos with Sync Lipsync 2 on AI Compare Hub, click the "Sync Lipsync 2" button at the top of this page. Upload your source video and replacement audio file, configure the sync mode and expressiveness, and generate in seconds. You can also compare Sync Lipsync 2 side-by-side with other leading AI lipsync models — all in one place, for free.