I have EXACTLY the same problem. I have tried changing codecs to no avail, I have noticed that cpu usage goes down from around 40% to 15 % when the choppiness starts.
Another problem I have...not sure if it's related is that when i try and fast forward recorded tv, it skips back. The amount of time it skips back is related to how long since the last time i fast forwarded. The longer the interval the further back it skips. Also the time shown bears no relation to the length of the actual recording!
Another problem I have...not sure if it's related is that when i try and fast forward recorded tv, it skips back. The amount of time it skips back is related to how long since the last time i fast forwarded. The longer the interval the further back it skips. Also the time shown bears no relation to the length of the actual recording!
France