when I create a video (I only worked with .mov clips) after rendering some transition work perfectly but anothers before start the transition freeze the video for several seconds then the video goes on but the transition doesnt appear. Its hard for me to explain myself. I hope someone can help me. I though this happened because of using .mov clips. If you are thinking that too how can I go from mov to avi or another extention you recomend? Thanks and Sorry for my english. 

hi!

could you:

1. try with a non-.mov video

2. upload and link your video (at least the interested frames)

?