https://huggingface.co/Lightricks/LTX-Video To quantify, just put the model in your ComfyUI\models\checkpoints

The quantify model file sizes are:

ltx-video-2b-v0.9-fp8_e4m3fn.safetensors 2.18G takes up about 10g of video memory when running
ltx-video-2b-v0.9-mixed.safetensors 4.36G Mixed-precision model. It seems that there is not much change in effect, but the size is smaller.

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