Glitches in Quick time file on timeline

[RonaldCz]

I loaded in a Quick Time file from my JVC Camera and used the keylight, levels and mask effect. Every project I have glitches in the play back and when I send to media encoder the file seems fine. 

I cleaned out the datebase and Cache. 
When I am  doing playback for client I would like the time line to play clean. 

[Mylenium]

Turn off hardware accelerated footage decoding in the preferences under Import and see if it improves matters.

Mylenium 

[RonaldCz · Accepted solution]

Yes, That did the trick, Thanks!