Unfortunately, I can confirm this bug also for Ubuntu 14.04.1.
I fixed the issue as described in http://askubuntu.com/questions/82652/file-association-to-unlisted-application by adding the argument %U in the "Exec" line of /usr/share/applications/avidemux-gtk.desktop
Unfortunately, I can confirm this bug also for Ubuntu 14.04.1.
I fixed the issue as described in http:// askubuntu. com/questions/ 82652/file- association- to-unlisted- application by adding the argument %U in the "Exec" line of /usr/share/ applications/ avidemux- gtk.desktop