No sound when playing mp4

Submitted by Fred

Assigned to Simon Steinbeiß @ochosi

Link to original bug (#12621)

Description

Got sound working fine when watching youtube etc. but have no sound when launching .mp4 file. I know the file has sound as I have used it multiple times on other systems. Ver. 0.8.1 Xbuntu 16.04 LTS

Version: 0.8.0