Changing tempo in Logic when Video is in project
I was wondering if anyone of you has come across this (I'm sure you have) and can explain why it does this. And also, is it ok that I do this.
I use Logic 9 to score music to film. My project's tempo is set at 120bpm. I then import the video into Logic and I can compose music.
My issue is with me changing the tempo by speeding it up. Let's say up to 180bpm. The end of the video goes grey and logic stops playing right at that point.
What I have found out that I can do is to start my tempo at say 220bpm before I import the video. Then, I can slow down the tempo and the video does mess up. As long as I make the tempo slower (not going faster than the original tempo of the project) it works fine.
I this safe to do? Is there a better way of doing it?
Thanks for the help.