How to get the sketch to play sound from videos on Ubuntu 16.04 LTS, 64 bits

Hello

I am using Processing 3 on a 64-bit Ubuntu distribution. When I load videos, using the Movie class from the Video library, there is no sound. I set 'video.volume(1);', and still there is no sound. On Windows 10, the video loads correctly, with sound, but I would like to use Linux, because I was unable to get Android mode to work on Windows and I got it to work on Linux. Please note that the sketch loads and plays the video on Linux, the only problem is the sound is not loaded.

Thanks.