InfiniteTalk API is an advanced AI lip sync video API developed by MeiGen-AI. It transforms images or text with audio into natural talking avatars, offering precise lip synchronization, expressive facial movements, and even infinite-length video generation.
Click to upload or drag and drop
Supported formats: JPEG, PNG, WEBP Maximum file size: 10MB
URL of the input image. If the input image does not match the chosen aspect ratio, it is resized and center cropped.
Click to upload or drag and drop
Supported formats: MPEG, WAV, X-WAV, AAC, MP4, OGG Maximum file size: 10MB
The URL of the audio file.
The text prompt to guide video generation.
Resolution of the video to generate. Must be either 480p or 720p.
Random seed for reproducibility. Valid range is 10000 to 1000000.
Explore different use cases and parameter configurations
Complete guide to using
InfiniteTalk API by MeiGen-AI is an advanced AI lip sync video API that turns images or text with audio into lifelike talking avatars. It supports image-to-talking-video, natural facial expressions, precise lip-sync, and infinite-length talking videos. With Kie.ai, you can test it free online—no local setup needed.
InfiniteTalk, developed by MeiGen-AI, is an open-source AI lip-sync generator API that uses a sparse-frame video dubbing framework to synchronize lips, head motion, posture, and expressions with audio—enabling infinite-length video generation while preserving identity and continuity. It supports both image-to-talking-video and Talking Videos API workflows for e-learning, marketing, and virtual avatars. With Kie.ai, you can try InfiniteTalk free online—no local setup required.
Upload a single portrait image and an audio file to generate a realistic AI talking video. The InfiniteTalk AI Lip-Sync Generator API ensures natural facial expressions, synchronized head movements, and accurate lip synchronization for professional-quality outputs.
Provide a text script along with an audio input to create a lip-synced talking head video. This makes InfiniteTalk a powerful AI lip-sync generator API for speeches, quotes, podcasts, and personalized content narration.
Beyond simple speech, the InfiniteTalk lip sync video API can generate avatars that appear to talk or sing in perfect sync with the audio. This feature of the AI lip-sync generator API expands creative possibilities for music videos, entertainment projects, and social media content, turning static portraits into engaging talking videos API outputs.
Built on the robust Wan 2.1 video diffusion model, the InfiniteTalk AI API benefits from strong visual understanding of human anatomy, facial expressions, and body movements, resulting in realistic and consistent talking avatars.
InfiniteTalk introduces a sparse-frame dubbing framework that aligns not only lip movements, but also head motion, posture, and facial expressions with the input audio. This creates highly expressive and natural talking videos.
Unlike most lip-sync tools limited to short clips, InfiniteTalk enables infinite-length video generation, making it ideal for podcasts, lectures, and other long-form digital content where duration is not a limitation.
With its advanced framework, InfiniteTalk reduces distortions in hand and body regions, ensuring more stable and consistent outputs. This makes the model more reliable than older lip-sync approaches.
InfiniteTalk achieves high-precision lip synchronization, surpassing traditional dubbing methods. Every syllable aligns smoothly, delivering talking videos that look professional and convincing.
Wan 2.1 is an image-to-video model that generates continuous video frames from a single image. Within the InfiniteTalk AI API, Wan 2.1 acts as the visual backbone, ensuring motion stability and temporal consistency for long-form video generation.
The InfiniteTalk AI API adds audio-driven synchronization on top of Wan 2.1. It aligns lips, facial expressions, and head motion with the input audio, enabling accurate lip-sync and natural talking avatars for both image-to-talking-video and long-form video generation.
With the InfiniteTalk API, users can generate realistic AI talking avatars from images and audio. This makes it easy to create engaging video content for podcasts, interviews, and social media storytelling.
InfiniteTalk lip sync video API can also be applied to music. By combining a portrait with a song or vocal track, the AI lip-sync generator API produces avatars that look like they are singing in sync with the audio. This makes it ideal for creating music videos, karaoke content, and social media performances, turning static images into engaging singing characters with the Talking Videos API.
Brands can integrate the AI lip-sync generator API into their marketing workflows. For example, a company can take product launch scripts, add a spokesperson’s portrait, and generate image-to-talking-video ads in multiple languages. This reduces production costs while providing highly localized video marketing content powered by the InfiniteTalk API.
Podcasters can repurpose audio episodes into InfiniteTalk AI talking videos. For example, a podcast host uploads their headshot and episode audio, and the InfiniteTalk lip sync video API produces a lip-synced video that can be shared on YouTube, TikTok, or Instagram—helping creators reach wider audiences beyond audio-only platforms.
Upload a portrait photo with an audio track to create an image-to-talking-video result. Alternatively, you can provide a text script with an AI-generated voice to test the InfiniteTalk API in text + audio mode.
The InfiniteTalk lip sync video API synchronizes lips, facial expressions, and head movements with your audio. Its advanced sparse-frame framework ensures accurate lip-sync and natural talking videos without time limits.
Within minutes, you’ll see your generated output online. The Talking Videos API lets you preview the result, download the video, or share it instantly—all without local deployment.
Kie.ai lets you try the InfiniteTalk lip sync video API directly in your browser. No local setup or heavy GPU is required—just upload your image and audio to generate image-to-talking-video results instantly.
We provide transparent and developer-friendly pricing. Whether you are testing prototypes or scaling production, Kie.ai makes it cost-effective to integrate the AI lip-sync generator API into your projects without overspending.
Besides MeiGen-InfiniteTalk, Kie.ai offers APIs for images, music, and video. Developers can combine them—for example, generate a character, add voice, then create a lip-synced talking video—to build scalable and flexible workflows.