[Alexandra Hidalgo] ” Do I leave everything else as is and only change the pixel rate in the inspector?”
You need to change the dimension as well.
1440×1080 HD pixels is the equivalent to 1920×1080 Squared pixels.
That will shows up everywhere as proper 16×9.
In Compressor, set “Frame Control ON”, and “Resize Filter: BEST”.
It will take longer, but you will achieve better picture quality.
rafael
http://www.nagavideo.com