Finding an interesting frame in a video

Question

Does anyone know of an algorithm that I could use to find an \"interesting\" representative thumbnail for a video?

I have say 30 bitmaps and I would like to choose the

Answer 1

I think you should only look at key frames.

If the video is not encoded using a compression which is based on key frames, you create an algorithm based on the following article: Key frame selection by motion analysis.

Depending on the compression of the video you can have key frames every 2 seconds or 30 seconds. Than I think you should use the algorithm in the article to find the "most" keyframe out of all the key frames.