I made a movie in iMovie using the DV Widescreen format. After I exported it to a quicktime file, the dimensions were larger then I wanted. I want to convert the video so that it has a height of 640. That way, it will play on iPod, but look good on the computer as well. I'm using VisualHub to convert my video. However, it always changes it from widescreen to 4:3, and the video looks stretched. Any idea on how to fix this?