Export Media Question re H.264 PAL DV Widescreen High Quality

Question

Using Premiere Pro CS4.
Why is the movie that I export being squashed into the 4:3 (tall and skinny) syndrome when I export using the following settings and view in Quicktime Player 7.6?
I captured the video straight from my video camera as DV AVI PAL 720 x 576 (1.4587).
I export the media as follows:
Format: H.264
Preset: PAL DV Widescreen High Quality
Summary - PAL, 720 x 576, 25FPS
It seems to be only happening with my .mp4 exports!?  i.e. the 16:9 ratio is perfect when I export to Microsoft AVI.
The really bizarre thing is I uploaded a squashed looking video to my Vimeo account and it displayed correctly (16:9) after processing!  Why then doesn't it play correctly in Quicktime Player?
Am I missing something in the Quicktime Player settings?
Please help! 

Answer 1

Here is how to correct this issue in the QT file permanently so it opens in a QT player correctly .
Open your mov in QT Pro
Show Movie Properties  (Ctrl-J)
Click on Video Track
Click on Visual Settings Tab
Un check the Preserve Aspect Ratio box
(Here is where you now need to do some math to change the 4x3 to 16:9 ratio)
Divide the Vertical Pixel Dimension  by 1.78 and enter the result in the Vert Dimension box
Ensure the Preserve Aspect Ratio box is UNCHECKED
Hit Tab key and notice the image in the QT window change.
In the QT Window Menu - File>Save  (Save is important!)
Heres an example:
QT movie Original is 320x240
Divide 240 x1.78    ( ie. 240/1.78=134)
Bingo!