Hi John,
Thank you for the answer!
I render my videos using the template Internet HD 720p at VBR with Maximum set to 16.000.000 and Average: 8.000.000
And with Choppy i mean that the actual image breaks up (the strage thing is that if i re-render the project is gonna break up in the same point everytime, in other videos too), like the quality go really bad for some seconds.
Maybe have i to try CBR?
I think im gonna try to change template too.
Thank you for reading.
Jeorg.