While cropping an mpeg clip, I set the red sliders to the start and end of the part I want to keep. I then crop and pack the timeline, and everything seems OK when I play the clip. When I make movie it starts a few seconds into the clip. When I check the clip afterwards it is still OK but the movie always starts a few seconds into the clip. It doesn't do this with all clips, only some of them.
I also have the same problem when just setting the sliders and then making the movie without cropping.
Any help?