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KeySync

On the record

Architecture
KeySync is a two-stage framework designed to improve temporal consistency in lip synchronization.antonibigata.github.io · read 9 Oct 2026
Demo limit
The Hugging Face demo is limited to videos of up to 6 seconds because of GPU restrictions.github.com · read 9 Oct 2026
Evaluation
The repository includes a LipScore metric for measuring synchronization quality between generated and ground-truth videos.github.com · read 9 Oct 2026
Expression leakage
Its masking strategy is designed to reduce expression leakage from the input video.antonibigata.github.io · read 4 Oct 2026
Framework
KeySync uses a two-stage framework to improve temporal consistency in lip synchronization.antonibigata.github.io · read 4 Oct 2026
Input formats
The quick start guide uses MP4 video files and WAV audio files as inputs.github.com · read 4 Oct 2026
Input preparation
The repository recommends converting video to 25 fps and audio to 16000 Hz for compatibility with the models.github.com · read 9 Oct 2026
Interactive demo
The demo accepts video and audio uploads to create synchronized videos and is limited to videos up to 6 seconds by Hugging Face Spaces GPU restrictions.github.com · read 4 Oct 2026
Leakage and occlusion handling
The framework uses a masking strategy to address expression leakage and facial occlusions.antonibigata.github.io · read 9 Oct 2026
License
The GitHub repository identifies its license as Apache-2.0.github.com · read 9 Oct 2026
Local requirements
The repository lists a CUDA-compatible GPU, Python 3.11, and Conda as prerequisites for local use.github.com · read 9 Oct 2026
Model weights
The repository instructs users to download pretrained models from the toninio19/keysync Hugging Face repository.github.com · read 4 Oct 2026
Occlusion controls
The command-line options include a setting to enable occlusion handling and coordinates for the object to mask.github.com · read 4 Oct 2026
Occlusion option
The inference parameters include an option to mask objects that block the face.github.com · read 9 Oct 2026
Occlusions
The framework includes a masking approach for handling facial occlusions.antonibigata.github.io · read 4 Oct 2026
Online demo
The interactive demo accepts video and audio uploads to create synchronized videos.github.com · read 9 Oct 2026
Preprocessing
Provided scripts can convert videos to 25 fps and audio to 16000 Hz, and crop videos around the face.github.com · read 4 Oct 2026
Pretrained models
The repository provides instructions to download pretrained models from Hugging Face.github.com · read 9 Oct 2026

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