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

SVI2Pro+FLFVideoExtension

• Allows you to extend existing videos using keyframes.

SVI2PRO FLF V1.1

• Added a switch to enable/disable end_samples (Last Frame) directly, without manually connecting/disconnecting inputs. This toggles the First/Last Frame functionality: if disabled, the node reverts to the base SVI 2 PRO behavior. (Requires updating the Wan-SVI2Pro-FLF nodes to the latest version)

• Added contrast adjustment widget, useful if your output looks washed out.

SVI2PRO FLF V1

• Workflow for ComfyUI that combines SVI 2 Pro motion continuity with Wan 2.2 First/Last Frame (FLF) style control over the end of a clip, enabling smooth video generation from a sequence of frames.
  

SVI2PRO VideoExtension

• This workflow uses SVI 2 PRO to extend existing videos: just load your video, add a prompt, and watch it seamlessly generate the continuation.

3-Stage Loop Automation

Experimental: 3-Part Loop Mode

Uses 3 images (Start / Loop / End) and 3 prompts to automate sequences:

• Start → Loop entry

• Repeating loop action (varies per cycle if increment is enabled)

• Loop exit → Final frame

Ensure prompts match their corresponding image transitions.

If you like these workflows, I’d love to see your results, please share your videos in the Gallery or link them in the comments.

Repository:

• https://github.com/Well-Made/ComfyUI-Wan-SVI2Pro-FLF

Recommended models for these workflows:

SFW:

• https://civitai.com/models/2053259?modelVersionId=2376074

• https://civitai.com/models/2053259?modelVersionId=2376133

NSFW:

• https://civitai.com/models/2053259?modelVersionId=2540892

• https://civitai.com/models/2053259?modelVersionId=2540896