Face Fix - Save Repaired Crop Review Video

Face Fix - Save Repaired Crop Review Video is the "watch the repaired face in motion" node. Where the copy node (Save Crop Review Video) stashes a pre-repair crop video for checking your tracking, this one takes the actual repaired face frames - the IMAGE batch that came out of the LTX stage - and encodes them into an mp4 you can scrub through. Output node again: it lives at the end of the branch and hands you back a saved_video_path.

You want this during iteration. LTX-regenerated faces can look fantastic as stills and subtly wrong in motion - a twitch, a warble, an identity that drifts every few frames. A still frame won't show you any of that; fifteen seconds of an mp4 will. In a pipeline where a full composite render takes a while, checking the repaired crop first is the fastest way to decide whether to re-run LTX or move on.

The inputs

• frames - the face-repair crop frames to save for review. This is the repaired batch, straight off the LTX decoder.
• fps - playback rate for the encoded video. Default 24, and you should set it to match your source footage or the motion will look wrong.
• output_folder - where the mp4 lands. Empty uses the default.
• filename - default face_fix_repaired_crop.mp4.

The output

• saved_video_path - full path of the encoded file.

How it works

It writes the frames out to a temp folder and shells out to ffmpeg (libx264, CRF 16, yuv420p) to encode the mp4. Two practical consequences. First, ffmpeg must be on your PATH - if the node errors with "FFmpeg is required", that's what it means; ComfyUI's bundled ffmpeg usually counts. Second, CRF 16 is a high-quality, visually lossless setting, so the review copy is faithful to what you'd see composited.

Installing it

Pack install as always: Manager → search vrgamedev, or:

cd ComfyUI/custom_nodes
git clone https://github.com/vrgamegirl19/comfyui-vrgamedevgirl.git

Restart, hard-refresh, and make sure ffmpeg is available to the environment ComfyUI runs in.

Common issues

• "FFmpeg is required to save Face Fix review videos." ffmpeg isn't findable. On Windows portable it's bundled with ComfyUI; if you're on a custom environment, install ffmpeg or add it to PATH.
• The video plays at the wrong speed. fps doesn't match your source. Set it to the source frame rate before running.
• Big run, huge file. CRF 16 is deliberately lossless-ish. Fine for review; don't use this node to produce your deliverable - that's the full-resolution composite's job.

It's a small utility, but in the Face Fix workflow it's the difference between guessing and knowing. Watch the crop, then composite.