Comment 3 for bug 1521755

I could solve the problem on CentOS:

make a backup of the file /usr/lib64/ADM_glade/main/gtk2_build.gtkBuilder

edit /usr/lib64/ADM_glade/main/gtk2_build.gtkBuilder, remove these lines in sections "<object class="GtkGrid" :

             <property name="n_columns">2</property>

             <property name="n_rows">2</property>

I had to remove 3 lines, afterwards I could start avidemux3_gtk

The path to the file gtk2_build.gtkBuilder may be different for you, just type "dpkg -l avidemux3_gtk" to find the right file on your system.

But I do not really like the new version. Some functionality got lost.