jobs in avidemux

Load 1st video, When finished making changes:

Avidemux menu: File -> Queue
in window "Queue job to joblist"
 Job name   : Job1 (name for job in joblist)
 Output file: click [Open] and choose name for saved video
Close that video (unless you want append the next)

Load 2nd video, When finished making changes
Avidemux menu: File -> Queue
in window "Queue job to joblist"
 Job name   : Job2 (name for job in joblist)
 Output file: click [Open] and choose name for saved video

Exit avidemux

Then, to avoid a bug, go in usr/bin, open a terminal and do
sudo ln -s avidemux2.7_cli avidemux3_cli
sudo ln -s avidemux2.7_qt5 avidemux3_qt5 
Start avidemux jobs (separate executable, same location where avidemux sits)

mark [v] use QT4 version (bottom of window)
press [Run jobs]