ComfyUI-SeedVR2_VideoUpscaler

ComfyUI-SeedVR2_VideoUpscaler

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Official release of SeedVR2 for ComfyUI that enables high-quality video and image upscaling.

Can run as Multi-GPU standalone CLI too, see 🖥️ Run as Standalone section.

SeedVR2 v2.5 Deep Dive Tutorial

Usage Example

Usage Example

📋 Quick Access

• 🆙 Future Work
• 🚀 Release Notes
• 🎯 Features
• 🔧 Requirements
• 📦 Installation
• 📖 Usage
• 🖥️ Run as Standalone
• ⚠️ Limitations
• 🤝 Contributing
• 🙏 Credits
• 📜 License

🆙 Future Work

We're actively working on improvements and new features. To stay informed:

• 📌 Track Active Development: Visit Issues to see active development, report bugs, and request new features
• 💬 Join the Community: Learn from others, share your workflows, and get help in the Discussions
• 🔮 Next Model Survey: We're looking for community input on the next open-source super-powerful generic restoration model. Share your suggestions in Issue #164

🚀 Release Notes

2025.12.24 - Version 2.5.24

• 🍎 Fix: MPS memory leak regression - Restored MPS cache clearing after VAE encode/decode operations that was accidentally removed during code cleanup in v2.5.23

2025.12.24 - Version 2.5.23

• 🔒 Security: Prevent code execution in model loading - Added protection against malicious .pth files by restricting deserialization to tensors only
• 🎥 Fix: FFmpeg video writer reliability - Resolved ffmpeg process hanging issues by redirecting stderr and adding buffer flush, with improved error messages for debugging (thanks @thehhmdb)
• ⚡ Fix: GGUF VAE model support - Enabled automatic weight dequantization for convolution operations, making GGUF-quantized VAE models fully functional (thanks @naxci1)
• 🛡️ Fix: VAE slicing edge cases - Protected against division by zero crashes when using small split sizes with high temporal downsampling (thanks @naxci1)
• 🎨 Fix: LAB color transfer precision - Resolved dtype mismatch errors during video upscaling by ensuring consistent float types before matrix operations
• 🔧 Fix: PyTorch 2.9+ compatibility - Extended Conv3d memory workaround to all PyTorch 2.9+ versions, fixing 3x VRAM usage on newer PyTorch releases
• 📦 Fix: Bitsandbytes compatibility - Added ValueError exception handling for Intel Gaudi version detection failures on non-Gaudi systems
• 🍎 MPS: Memory optimization - Reduced memory usage during encode/decode operations on Apple Silicon (thanks @s-cerevisiae)

2025.12.13 - Version 2.5.22

• 🎬 CLI: FFmpeg video backend with 10-bit support - New --video_backend ffmpeg and --10bit flags enable x265 encoding with 10-bit color depth, reducing banding artifacts in gradients compared to 8-bit OpenCV output (based on PR by @thehhmdb - thank you!)
• 🍎 Fix: MPS bicubic upscaling compatibility - Added CPU fallback for bicubic+antialias interpolation on PyTorch versions before 2.8.0, resolving RGBA alpha upscaling errors on Apple Silicon
• ⚡ Fix: Cross-platform histogram matching - Replaced scatter_ operation with argsort+index_select for improved reliability across CUD