SCAIL2 - Long videos + High-res fix + NVIDIA VSR + Interpolation — v1.0

Use this workflow to animate one or more characters from a character image and a reference or guiding video, transferring motion or recreating a performance and producing either a standalone clip or a version of the guiding video with the character replaced.

Use a simple text description to identify a subject for SAM3 pose detection and isolation from the guiding video.

For long videos, the workflow uses overlapping batch windows and can apply a high-res fix pass, NVIDIA VSR upscaling, and RIFE VFI interpolation.

Use a character image and a reference or guiding video; use a simple text description to identify a subject for isolation.

The output video can keep the original audio or use custom audio from an audio file or video source.

Plan to use ComfyUI nightly because newer core nodes may not be available in the stable release.

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Install the latest versions of KJNodes, ComfyUI Essentials, rgthree-comfy, and ComfyUI-Frame-Interpolation.

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Required model files include: wan2.1_14B_SCAIL_2_fp8_scaled.safetensors, lightx2v_I2V_14B_480p_cfg_step_distill_rank64_bf16.safetensors, wan_2.1_vae.safetensors, clip_vision_h.safetensors, sam3.1_multiplex_fp16.safetensors, and umt5_xxl_fp8_e4m3fn_scaled.safetensors.

Required node packs include: comfyui-custom-scripts, comfyui-kjnodes, comfyui-impact-pack, comfyui-resolution-master, comfyui-easy-use, crt-nodes, comfyui-frame-interpolation, rgthree-comfy, comfyui_layerstyle, comfyui_nvidia_rtx_nodes, and comfyui-videohelpersuite.

Before setup, check for these exact names: wan_2.1_vae.safetensors, clip_vision_h.safetensors, umt5_xxl_fp8_e4m3fn_scaled.safetensors, and comfyui_nvidia_rtx_nodes.

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Choose standalone generation or replacement mode, and use the Power LoRA node with Wan2.1-compatible character, concept, or style LoRAs.

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Use the yellow nodes for adjustable options and the red nodes for instructions and useful notes.

Back up your ComfyUI setup before installing new nodes or updating it; manual file changes or poorly managed custom-node installs can break the environment.

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If installing ComfyUI_NVIDIA_RTX_Nodes through ComfyUI Manager triggers a security-level error, use security_level = weak only temporarily in ComfyUI/user/__manager/config.ini on a portable install, then restore the original setting after confirming the node link is https://gith‌

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