Aspect Ratio differences at QuickTime and uStream Producer with iSight

Hey there,

I got some problems with my iSight camera recording video at 16:9 aspect Ratio.

Recording with QuickTime I got 16:9 videos. But recording with photobooth or ustream producer I just got 4:3.

I can select 16:9 video in the ustream producer settings but it just adds some black bars...

Is someone familiar with that problem and might has the answer fixing this?

best regards

ps: My machine is a macbook pro mid 2012 and it runs 10.8.3. And sorry for my rusty englisch!