SVI 2 PRO with First/Last Frame (Keyframes) // Video Continuation // 3-Stage Loop Automation — SVI2PRO VideoExtension

Use this ComfyUI workflow to extend an existing video: provide a video and a prompt, and it can generate a continuation with First/Last Frame keyframe control.

First/Last Frame control combines SVI 2 PRO motion continuity with Wan 2.2 control over the end of a clip.

The experimental 3-Part Loop Mode moves from Start to Loop entry, repeats the loop action, then moves from Loop exit to the Final frame.

Video-extension mode takes an existing video and a prompt, then outputs a continuation.

3-Part Loop Mode takes Start, Loop, and End images plus three prompts and automates a sequence ending at the Final frame.

The listed base model is Wan Video 2.2 I2V-A14B, and the workflow version is SVI2PRO VideoExtension.

Before use, check that these ComfyUI node packs are available: comfyui-frame-interpolation, comfyui-gguf, comfyui_essentials, comfyui-easy-use, comfyui-custom-scripts, comfyui-kjnodes, comfyui-videohelpersuite, comfyui-customnodes-template, comfyui_layerstyle, rgthree-comfy, and

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Also check for these model files: umt5_xxl_fp8_e4m3fn_scaled.safetensors, wan22EnhancedNSFWCameraPrompt_nsfwFASTMOVEV2Q8L.gguf, wan2.2_i2v_lightx2v_4steps_lora_v1_high_noise.safetensors, SVI_v2_PRO_Wan2.2-I2V-A14B_HIGH_lora_rank_128_fp16.safetensors, and wan_2.1_vae.safetensors.

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The list also includes RealESRGAN_x4plus.safetensors, wan2.2_i2v_lightx2v_4steps_lora_v1_low_noise.safetensors, wan22EnhancedNSFWCameraPrompt_nsfwFASTMOVEV2Q8H.gguf, rife49.pth, and SVI_v2_PRO_Wan2.2-I2V-A14B_LOW_lora_rank_128_fp16.safetensors.

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The First/Last Frame switch can enable or disable the Last Frame input; when disabled, the node reverts to base SVI 2 PRO behavior.

A contrast-adjustment widget is available for cases where the output looks washed out.

In 3-Part Loop Mode, enabling increment can vary the repeating loop action per cycle; match each prompt to its corresponding image transition.

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Before setup, verify which packages to install for comfyui-gguf and ComfyMath, and verify the sources for wan22EnhancedNSFWCameraPrompt_nsfwFASTMOVEV2Q8L.gguf, wan22EnhancedNSFWCameraPrompt_nsfwFASTMOVEV2Q8H.gguf, and SVI_v2_PRO_Wan2.2-I2V-A14B_HIGH_lora_rank_128_fp16.safetensors

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Before using First/Last Frame control, verify that the Wan-SVI2Pro-FLF nodes are up to date. The 3-Part Loop Mode is described as experimental, and no license is listed.

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