There is a bad link to a file not present in the archive
That one should work
k
http://avidemux.org/nightly/osx_qt5/Avidemux2.6_r2016_08_21_4478db52b32.dmg
I downloaded 2.6.13 but it seems to have lost some video output codecs. xvid4, x264 and x265 are gone. Also, can no longer paste text into save dialogue.
Crap