Static ffmpeg binaries for the main platforms.

windows: http://ffmpeg.zeranoe.com/builds/
linux: http://johnvansickle.com/ffmpeg/
max os x 64 bit: https://evermeet.cx/ffmpeg/

Android:

https://github.com/hiteshsondhi88/ffmpeg-android/releases/download/v0.3.3/prebuilt-binaries.zip