ComfyUI: High-quality 720p long context generation

Demo summary
A demonstration of the 720p long context workflow in ComfyUI, showing how to adjust resolution, prompt, and block swap parameters for higher fidelity output.
Step-by-step
- Drag and drop the 10-step high-quality workflow file into ComfyUI
- Upload your source media using the 'Choose file to upload' button
- Set the frame count to match your source (e.g., 250 frames)
- Enter your text prompt in the prompt node
- Adjust the resolution to 1280x720 for HD output
- Select the '14 billion parameters image to video 720p GGUF Q8' model
- Set the block swap parameter based on your available VRAM
- Click Run to start the generation
Options
- Toggle 'Enabled VAE tiling' or 'Tiled VAE' to prevent memory errors
- Switch between Sage Attention, Flash Attention 2, or SDPA
- Use a low VRAM configuration (8GB or 15GB) if needed
- Adjust block swap count (e.g., 20 for speed, 40 for lower VRAM usage)
Watch out for
- Flash Attention 3 and Flex Attention are not supported by the current auto-installer
- 720p generation takes significantly longer than 480p workflows
- High-quality settings can use up to 28 GB of VRAM
- Quantization settings are disabled when using GGUF models
Tips
- Use Sage Attention for the best balance of speed and performance
- Reduce the number of block swaps to speed up generation if you have sufficient VRAM
- Monitor the CMD window to see how much of the model is offloaded to the CPU versus the GPU
- Ensure the frame count is extremely precise as this workflow is sensitive to that value
Highlights
“With 10 steps version, you don't need to set anything, everything is set.”
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