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Tencent’s Hunyuan lab has unveiled Hunyuan Video-Foley, a novel AI system designed to revolutionize the audio landscape of AI-generated videos. This technology directly tackles the critical issue of creating high-fidelity soundtracks that are seamlessly synchronized with the visual elements in AI-created content. Unlike earlier video-to-audio models that relied heavily on textual prompts, Hunyuan Video-Foley prioritizes visual information, leveraging a vast, meticulously curated library of video, audio, and textual descriptions during its training process.

The AI employs a two-pronged approach: initially focusing on establishing a precise visual-audio connection to ensure impeccable timing, and subsequently integrating textual prompts to capture the broader contextual nuances. A proprietary training strategy, known as Representation Alignment (REPA), is instrumental in maintaining exceptional audio quality. Independent evaluations have demonstrated that Hunyuan Video-Foley consistently outperforms competing AI models, earning higher ratings from human listeners in terms of audio quality, timing accuracy, and overall synchronization. Tencent’s Hunyuan lab announced the open-source availability of the AI on August 28, 2025, via a tweet on X (@TencentHunyuan).

By automating the intricate process of Foley artistry, this innovation unlocks significant potential for filmmakers, animators, content creators, and other professionals seeking to enhance the immersive quality of AI-generated videos.