Render to DV and sequencer questions

I got two problems:

  1. Im having problems with rendering to DV format on the linux version of Blender. The files that I get aren’t readable in any other program than in Blender. Has anyone else had this problem or is it only something Ive managed to do wrong?

  2. Also is it possible to resize the files in the sequense editor so that they dont get streched and distorted to the fit the output format (it doesnt look very good when 1024x576 get streched to 720x576).