I'm using the Jitsi client 22.214.171.124 on Linux Mint 17. I have a Toshiba C55 with a built-In webcam. My video is eratic, Kind of green, and jumps, and flickers around. How can I fix this. Other video applications I have installed do not have this problem. I have installed a couple of different versions of the Jitsi client, and all have the same problem.