PIP choppy

Hi everyone,

 

Now that I've managed to run correctly the double tuner on my Vu Duo and OpenPLi, I would like to use the PIP.

When I enable it, I have the image that is displayed but it is choppy, as if there was one image per second. Thus one can see what is happening on the other channel but not really follow.

 

Should I use any particular plug-in? I use the one that comes by default with OpenPLi (3).

 

Thank you in advance.