In this case, in the repositories of Ubuntu /Linuix Mint/PinguyOS is an app called Multimedia systems selector (gnome-media) Settings applications GStreamer by default.
But what to do if you are there all tried, but no change!?
As you can see in the pictures, there are two necessary tabs: Audio and Video. In each tab there is a check button to Check. You can test the Audio and Video by clicking on these buttons. If some settings are not working correctly, you can change them at its discretion in the value of the Module and re-press the button to Check, achieving the desired result.
Installation into Linux Mint:
sudo apt install gnome-media
You can run the program with the command:
gstreamer-properties & exit