If you want your video output resolution to be 1920x800 then you have to change the project properties and the render settings.
I have just done a tutorial about how to do this:
Notice that if you use pan/crop, it will have to be done for each event. Instead, you might prefer to use the track motion settings.
Hope this helps,
Frederic
--
FBmn Software: Professional GPU-powered plug-ins to fix
White Balance and
Exposure issues in a few clics.
Color-matching made easy with the ColorMatch plug-in.
Want to learn on Sony Vegas
Event Pan/Crop tool? Watch my
tutorial.
Or about
Keyframes? Watch
this one. French version
here.