Save Video Pixaroma

Save Video Pixaroma is the video sibling of Save Image Pixaroma, and it fixes the two things that make stock video saving annoying: you're stuck with ComfyUI's output folder, and audio is a separate headache. This node encodes frames plus optional audio straight to MP4, saves to any folder on your computer, and has a built-in <video> preview so you can watch the result without leaving ComfyUI (click the picture to play/pause).

The filename builder is the same one as Save Image Pixaroma, with clickable chips for everything you might want in a name: the wired filename, the date or time, an auto-increasing counter, the width and height, the batch number, the fps, the duration - plus %input%, which uses the name input to keep the original filename. Files never overwrite (the counter continues from the highest one already there), and typing / in the name makes subfolders.

Inputs

• video_frames (required) - the frames to encode, as an image batch. Wire a video source, an AudioReact Pixaroma video_frames output, or any node that produces a batch of images. They must be RGB with even width and height - the node says so clearly rather than letting ffmpeg fail cryptically.
• fps (FLOAT, default 24, 1–240) - frames per second. Wire the fps output of whatever produced the frames so the two always agree, or type a number.
• audio (optional) - a sound track, mixed into the MP4 as AAC 192k. If the audio can't be read, the video still saves - just without it. A "Trim to audio" setting ends the video where the audio ends.
• name (optional) - used by the %input% token; wire a loader's filename output here to keep the original name. Put a slash after the token (%input%/clip_%counter%) to save into a folder named after it.

How it encodes

The node needs ffmpeg, and it finds it automatically: it prefers the executable bundled with imageio-ffmpeg (a pip install away, no system setup), and falls back to ffmpeg on your PATH. If you hit a "can't find ffmpeg" error, that's the fix.

pip install imageio-ffmpeg

Install

Part of the Pixaroma pack: ComfyUI Manager → search Pixaroma → install → restart, or:

cd ComfyUI/custom_nodes
git clone https://gitlab.com/pixaroma/comfyui-pixaroma.git

It pairs naturally with Load Audio Pixaroma (trim the track) and Load Video Pixaroma (re-encode loaded frames), but works with any source that produces frames + AUDIO. The pack-wide gotcha applies: hard-refresh the browser tab (Ctrl+Shift+R / Cmd+Shift+R) after an update. And the usual video trap - odd-width frames, or an fps that disagrees with the source - is exactly what the fps wiring and the even-dimension check are there to prevent.