Hi
didn't find any bug ticket on this,
just want you to know, videos which are coded in realvideo (at least real video 4.0 "RV40") does lag on VLC 2.2.1. (only video video lag. The audio in another codec is fine and smooth)
Before, i was on VLC 2.0.1 and i had no problem.
To be sure, i just deleted 2.2.1 and reinstall this "old" version, and the problem is solve.
Cheers,
Mad