ReCaVSR lands in ComfyUI: one-step Wan2.2 video upscaler hits 4K at 4.65 fps on an RTX 4090
LatentSpacer · reddit · 2026-11-11
A developer ported ReCaVSR—a one-step streaming video super-resolution model built on Wan2.2 TI2V-5B by USTC researchers—to native ComfyUI nodes, now supporting videos of any length.
Key specs: 4×/2× upscaling with one diffusion step per 8-frame block; a built-in FlashDecoder streams decoding so longer clips cost time, not memory. Benchmarks: 149 frames 960×480→3840×1920 in 36 s on an RTX 4090 (67 s on a 3090); a full 3:58 clip (7,153 frames) upscaled 1080p→4K in 25 minutes (4.65 fps). The int8 ConvRot transformer is 1.8× faster with 4 GB less VRAM at 47–48 dB vs bf16; 1440×1440 output runs on an 8 GB card and 24 GB cards can reach 5.5K. Oversized outputs trigger chunked input projection and KV-cache offloading, with NVENC used for encoding. As a diffusion upscaler it generates rather than recovers fine detail. Nodes are on ComfyUI-Manager; int8 and bf16 weights are on Hugging Face.
Related event: ReCaVSR Ported to ComfyUI for One-Step 4K Video Super-Resolution(3 posts)→
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