Create Long‑Form Talking Videos With InfiniteTalk (Without Identity Drift)
InfiniteTalk is an audio-driven video generation model for sparse-frame video dubbing developed and released by the MeiGen-AI team, with an arXiv technical report submitted on 19 Aug 2025 and an official open-source repository under the MeiGen-AI organization . It is designed for “talking video” synthesis and dubbing: given a source video + driving audio (video-to-video) or a reference image + audio (image-to-video), InfiniteTalk generates a new video with accurate lip synchronization while also aligning head movement, body posture, and facial expressions to the audio .
What makes InfiniteTalk distinct is its sparse-frame video dubbing paradigm and streaming setup for long sequences: the paper frames it as a way to preserve reference keyframes for identity, gestures, and camera trajectory while enabling holistic, audio-synchronized motion editing—built explicitly for infinite-length long sequence dubbing . In practice, this translates into a workflow that’s purpose-built for long-form voiceovers, localization, and “keep the character consistent” scenarios—where conventional mouth-only dubbing or short-clip generators tend to break down over time .
On the technical side, the official repo documents output compatibility at 480P and 720P resolutions , and includes guidance for both single-person and multi-person animation workflows . On Vidofy, you can tap into these core capabilities without local environment setup—so you can focus on your inputs (reference video/image + clean audio) and iterate quickly.
Infinite-Length Dubbing vs Conversational Control: InfiniteTalk vs MultiTalk
InfiniteTalk and MultiTalk are both audio-driven video generation systems, but they’re optimized for different outcomes. InfiniteTalk is built around sparse-frame video dubbing and long-form stability, while MultiTalk focuses on multi-person conversational video generation with prompt-driven interaction. Here’s how they compare when you’re choosing the right engine inside Vidofy.
| Feature/Spec | InfiniteTalk | MultiTalk |
|---|---|---|
| Primary model purpose | Sparse-frame video dubbing (audio-driven video generation for long sequence dubbing) | Audio-driven multi-person conversational video generation (interactions following a prompt) |
| Supported input setup | Video-to-video + audio, and image-to-video + audio | Multi-stream audio input + reference image + prompt |
| Long-form / duration capability | Infinite-length / unlimited video duration (designed for infinite-length long sequence dubbing) | Up to 15 seconds |
| Output resolution | 480P and 720P compatibility | 480p and 720p output |
| Aspect ratio support | Not verified in official sources (latest check) | Arbitrary aspect ratios |
| Multi-person support | Multi-person animation workflow documented | Supports single & multi-person generation |
| License & content rights statement | Apache 2.0; repository states it claims no rights over generated contents | Apache 2.0; repository states it claims no rights over generated contents |
| Accessibility | Instant on Vidofy | MultiTalk also available on Vidofy |
Detailed Analysis
Analysis: Why InfiniteTalk is the better long-form dubbing engine
InfiniteTalk’s official positioning centers on sparse-frame video dubbing and a streaming generator designed for infinite-length long sequence dubbing . If your goal is to keep a single identity stable over a long narration—while still editing more than just lips (head motion, posture, expressions)—InfiniteTalk is purpose-built for that use case . On Vidofy, this becomes a practical advantage: you can iterate on audio takes and source footage without rebuilding a local pipeline.
Analysis: When MultiTalk is the smarter choice (and when it isn’t)
MultiTalk is explicitly framed as multi-person conversational video generation: it takes multi-stream audio, a reference image, and a prompt to generate interactions that follow the prompt, with lip motions aligned to audio . That makes it a strong option when you need prompt-steered interactions or dialogue staging. The tradeoff is that its official long-video capability is described as up to 15 seconds , so it’s less aligned to long-form dubbing scenarios where InfiniteTalk is designed to keep going.
Verdict: Choose InfiniteTalk for Long-Form Dubbing—Use MultiTalk for Prompted Dialogue Scenes
How It Works
Follow these 3 simple steps to get started with our platform.
Step 1: Add your source and driving audio
Upload a source video (for dubbing) or a reference image (to create a talking clip), then upload the audio track you want InfiniteTalk to perform.
Step 2: Choose InfiniteTalk and generate
Select InfiniteTalk on Vidofy and start generation. Vidofy handles the model runtime so you can focus on iteration and creative direction.
Step 3: Review, refine, and export
Check lip sync and expression alignment, adjust inputs if needed (cleaner audio, better reference), then export the result for your editing pipeline.
Frequently Asked Questions
What is InfiniteTalk?
InfiniteTalk is an audio-driven video generation model for sparse-frame video dubbing, designed to synthesize a new talking video from audio while aligning lips, facial expressions, and full-body motion to the soundtrack . Its technical report describes a streaming generator aimed at infinite-length long sequence dubbing .
What inputs does InfiniteTalk support on Vidofy?
The official repository describes two core workflows: audio-driven video-to-video generation (source video + audio) and image-to-video generation (reference image + audio) . The repo also documents a multi-person animation workflow .
What output resolutions does InfiniteTalk support?
The official InfiniteTalk repository states the model is compatible with both 480P and 720P resolutions .
Does InfiniteTalk have a duration limit?
InfiniteTalk is described as supporting unlimited / infinite-length generation in its official repository and as a streaming generator designed for infinite-length long sequence dubbing in the technical report .
Is InfiniteTalk free to try on Vidofy, and what devices are supported?
On Vidofy, you can typically try models through a browser-based workflow, then scale up via paid usage when you’re ready. Availability of free access, trials, or plan details can vary—check your Vidofy dashboard for the current options for InfiniteTalk.
Can I use InfiniteTalk outputs commercially? What are the license and content rights?
The official InfiniteTalk repository states the models are licensed under the Apache 2.0 License and includes a statement that it claims no rights over generated contents, while requiring users to comply with applicable laws and responsible-use constraints . For commercial use decisions, always review the license terms and your project’s legal requirements.