Movies to be played in computers and similar must be built with Squared pixels.
A 320 x 240 SQ pixels movie has not 16x9 aspect. Not even 4/3.
[john whiteway] "Once these settings are made, in the summary of this custom codex I see "Width 320, Height 240"
Forget about the summary.
Set 100% of the source.
rafael
http://www.nagavideo.com