The file is loaded, the info shows that the file contains an aac stream but when is played there is no sound.
Screen capture
(https://t9.pixhost.org/thumbs/364/39708552_2017-04-30_010816.jpg) (https://pixhost.org/show/364/39708552_2017-04-30_010816.jpg)
Sample
https://mega.nz/#!1lwHzTja!2RjWvZkNte6WmXuf9t27Cglxki8DA80t8QSS9orz8vM
I'm using avidemux 2.6.20 64bit under win7
It does play here with sound in Avidemux v2.7.0 (170430_15d66e73c19) on ubuntu 16.4.2 amd64
Check your preferences in Avidemux menu: Edit: Preferences
info: Plus de son/No Sound when playing videos with audio track (http://avidemux.org/smif/index.php/topic,16779.0.html)
Thank you! Changing from dummy to win32 in preferences=>audio solved the problem ;D