SCAIL-2 bf16 Loop FullLength Motion Transfer

Transfers the motion of a driving video onto a reference character image and renders the entire clip length, using the Wan 2.1 14B SCAIL-2 preview model in full bf16 on a single H100 80GB (no GGUF quantization, no offload).

Pipeline: SAM3 tracks the subject in both the driving video and the reference image → SCAIL2ColoredMask builds colored pose/reference masks → WanSCAILToVideo conditions generation. The first 81-frame window is sampled in one pass (euler, 6 steps, LightX2V cfg-step-distill LoRA @ 0.8, shift 5), then a for-loop generates sliding 76-frame windows with a 5-frame overlap fed back as previous_frames, color-matches each chunk (ColorTransfer reinhard_lab) and stitches them until the full driving video is covered. The result is muxed with the original audio at source fps (h264 mp4).

Usage: load the reference image + driving video, set positive/negative prompts, set output resolution on the "Resize Pose Video" node — window/loop math is computed automatically from the source frame count.

Models: Wan21-14B-SCAIL-preview bf16, umt5_xxl fp8, clip_vision_h, wan_2.1_vae, LightX2V I2V rank64 LoRA, sam3.1_multiplex_fp16.
Custom nodes: ComfyUI-KJNodes, ComfyUI_Swwan, ComfyUI-easy-use, ComfyUI-VideoHelperSuite, rgthree-comfy, crt-nodes.