FFmpeg on Windows Wiki @ http://ffmpeg.arrozcru.org/wiki/index.p ... =Main_Page

Builds (list of people that are distributing FFmpeg) @ http://ffmpeg.arrozcru.org/wiki/index.php?title=Builds

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bəʊɡɪ bəəs

I don't know if there are differences between Windows builds but for FFmpeg i use builds from http://ffmpeg.zeranoe.com/builds/

If you don't want to dive into the huge documentation of FFmpeg, here is quick memo for useful commands : 19 ffmpeg commands for all needs.