Exporting to QuickTime - 4:3 being stretched to 16:9

Hey everyone,

I do a lot of video work. Recently when exporting a 4:3 video FinalCut Express started stretching it to 16:9. I have checked all of the setting and threw away the preference files. It is still doing it.

The problem is that when I do the other export option it takes 3 to 4 times longer to get it done, which I don't have to time for. It can be up to 11 hours for a 2 hour video.

Is there a way to fix this and have the export using QuickTime keep the aspect ratio?

MacBook Pro, Mac OS X (10.5.7)

Posted on Jun 29, 2009 5:19 PM

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31 replies

Jul 1, 2009 7:33 PM in response to frenchjr25

There is no problem. They are both the same, and the same as the canvas in FCE. In the zoom popup on the canvas there is a check mark for Correct for Aspect ratio. It's on by default. If you switch it off it will look like the QT player. When it's switched on the video is displayed at 4:3, the display aspect ratio of DV, the equivalent of 640x480 in square pixels, which is what computers use. DV is not in square pixels. It's in rectangular pixels. It's dimensions are 720x480. Do the math. That's not 4:3. That's why the item properties for the clip says the pixel aspect is CCIR601. The pixels have a ratio that is 0.9. The pixels are taller than they are wide. There are more of them horizontally to make up a greater horizontal resolution. But computers can't display pixels that have a 0.9 aspect ratio, only square pixels with an aspect of 1.0. The QuickTime player is showing the video the way it actually is, 720x480, 3:2, not the corrected aspect ratio of 4:3 that you see in the Canvas in FCE, or you see when you export to MPEG-4, where it's resized to 640x480.

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Exporting to QuickTime - 4:3 being stretched to 16:9

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