ffmpeg
several ffmpeg scripts.
you can download builds from ffmpeg.zeranoe.com/ or by using the "updater" batch file, ffmpeg.zeranoe.com is offline, there are few auto-builds alternatives: https://github.com/AnimMouse/ffmpeg-autobuild/releases https://github.com/BtbN/FFmpeg-Builds/releases https://github.com/GyanD/codexffmpeg/releases and archive at: https://github.com/advancedfx/ffmpeg.zeranoe.com-builds-mirror/releases
and trac.ffmpeg.org/wiki/ and ffmpeg.org for docs/help/examples/etc...
some 3rd-party tools under tools, windows builds and python cmd wrapping to allow easy run under windows.
ps. windows 7 needs to apply you need to apply a registry fix to allow favoring the use of the external manifest over an embedded one.