HI Ivan,
after reading your post I opened premier pro to try to encode one of the clip and today everything it works fine… I did close and open the app few time yesterday but did not solve the problem.. I don’t know. Your suggestion is a good test, if happen again I will try to see what happen. I would like to work without encoding because I have 100 GB of footage from different cameras and I would prefer to work with raw footage. I am an avid editor, I just switched to premier pro cc for this reason. Even with media composer 7 the DSLR footage imported with link to AMA still not smooth when you play it in timeline or source monitor. avid suggest to have 16gb ram, I have 8 but with premier pro raw material works perfect.
If the problems comes back I will ask again for your help! 🙂
thanks very much
Maurizio