Anyway to find an image or clip within another video?

[Zarxrax]

Curious if it is possible for avisynth to do anything like this:
Take a frame or short clip from one video, and search for it's location in another video. While the 2 videos contain the same general footage, they may differ greatly in quality, resolution, cropping, and so on.

I have hundreds of clips that I am trying to locate within tens of hours of footage, so some semi-automated method would be much simpler than manually searching through all of the footage for every single clip.

If not avisynth, perhaps it might be possible using ffmpeg or some other tool?

[ChaosKing]

This seems to be exactly what you're looking for https://www.video-comparer.com/

This one seems to be free http://teemoon.name/VideoID/

[Zarxrax]

Unfortunately, after trying them, neither software was able to detect any matches in my files. It doesn't look like they are flexible enough with the differences.