'How to browse through a very very long video quickly

I have several month of h.265 video from a security cam. I like to look through quickly. Problem: All videoplayers are only able to speed up up to 100x. Also it's 4k. So speedup is also limited by CPU power. I need 1000x speedup or more. So I need a player which is capable looking only on keyframes (to speed up processing) and also process only every x keyframe to make it really fast. This should work in a player. I don't want to reencode.

Any Ideas

cheers Timo



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