保存视频（去除元数据）

The image leak has a video cousin. Wan, LTX-Video, HunyuanVideo - whatever pipeline you're running, if it ends in a video save node, the output file can carry your generation details along for the ride. CleanMetadataSaveVideo (保存视频（去除元数据） in the node menu, this pack is Chinese-labeled) is the same play as its image sibling: hang it where the official save node goes, and the video comes out scrubbed on the way out.

What it is

It takes the native VIDEO object - the exact interface the core Save Video node uses - so it drops into any modern video workflow that already has one of those. One wire in, default settings, done. That's the whole pitch, and it's a good one.

How the cleaning works

Under the hood it's simple and careful. The node saves the VIDEO to a temp file, then hands it to ffmpeg. With video_format set to auto (the default) or mp4, that's a stream copy - -c copy plus metadata mapped away - so the streams are copied byte-for-byte with no re-encode. No quality loss, audio intact, framerate taken from the source, and MP4 gets +faststart so it starts playing before it's fully downloaded. Only webm (VP9 + Opus) and gif re-encode - with an auto-generated palette for the GIF - so you pick those when the format is the point, not when you want quality.

Inputs and outputs

Inputs: video (VIDEO), filename_prefix (default CleanedVideo), video_format (auto / mp4 / webm / gif). Outputs: 视频 (VIDEO, passed through) and 文件路径 (STRING). It's an output node - end of the line.

The ffmpeg requirement

The dependency to know about is ffmpeg. Images never need it; video absolutely does. The pack hunts for it in a sensible order - system PATH first, then a bundled ffmpeg.exe beside the ComfyUI root (portable installs ship one), then the copy imageio_ffmpeg provides - and it even checks that the ffmpeg it found has the codecs for what you asked, skipping lite builds that don't. If nothing qualifies you get a clear error; the fix is dropping a full ffmpeg build in the ComfyUI root or on PATH.

Gotchas and verification

Two gotchas worth remembering. First, this needs a ComfyUI recent enough to have the native VIDEO type at all - that's the 2025-era builds that ship the core Create Video / Save Video nodes. If you're on an old portable install, update before you go looking. Second, don't confuse "no metadata" with "wrong file." Verify the author's way:

ffprobe -show_format your_file.mp4

No comment or title in the tags and you're clean. And when you still see major_brand and handler_name in there - relax. Those are structural fields of the MP4 container itself, present in every MP4 ever made, and every metadata tool leaves them alone. That's not a leak.

Frames to video

One workflow note while you're here: if you're generating individual frames and want a video, chain the core Create Video node first to turn the frames into VIDEO, then feed this one. The README recommends it, and it's the right shape.