Video Get Frame Rate

VideoGetFrameRate is one of those small utility nodes you don't appreciate until you need it: it reads the frame rate of a video and hands it to you as an INT. That's the whole job. No decoding, no pixel work, nothing clever - it pulls the number straight from the file's metadata, so it's effectively free.

In the ComfyUI-Video-Edit pack, this is a pure helper. Its real value is keeping your graph's numbers correct instead of hardcoded. Video generation and interpolation nodes care a lot about fps - save a video at the wrong frame rate and a clip that looked fine in the graph plays back too fast, too slow, or with judder.

How to use it

One input, one output:

• video (VIDEO) - feed it from Video Load Preview, same as the rest of this pack.
• Output: frame_rate (INT) - the video's frames per second, rounded to a whole number.

Wire that frame_rate output into anything with an fps/frame_rate input - a Video Save node, an interpolation setup, a workflow that generates a matching clip. The honest use case: you loaded a source clip that's 30fps but you're generating a 24fps insert for it, and you want the numbers visible in the graph instead of memorized.

Gotchas

• It's an integer, so fractional rates get rounded. A 29.97fps file reads as 30. For casual editing workflows that's usually fine - for frame-accurate work with interlaced or drop-frame sources, be aware you're getting the rounded value.
• It reads what the file claims, not what's actually true. A lazily muxed or badly re-encoded file can report a wrong rate. If a video plays at the wrong speed after you use this, blame the source, not the node.
• It's a metadata read. If your video came from a node that only exists as an in-memory tensor (like ImageToVideo from this same pack), it still works - it just reports the rate that node was given.

Install

The pack installs the standard way:

cd ComfyUI/custom_nodes/
git clone https://github.com/guchendesigndog/comfyui-video-edit.git
pip install -r comfyui-video-edit/requirements.txt

Or search "ComfyUI-Video-Edit" in ComfyUI Manager and restart. The one dependency is PyAV (av>=10.0.0), which needs FFmpeg installed. It's a tiny pack by a solo author (谷尘 / guchendesigndog on GitHub), MIT-licensed, no community drama to speak of - read the source if you're curious; the whole file is a single readable Python module. If you're building the kind of workflow where this node is useful, its sibling VideoGetTotalFrames probably belongs next to it.