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I have a video (from my Android Nexus One). Dimensions are 720 x 480. The pixel aspect ratio is, according to data embedded in the file, 0.9091.

Now, editing the video and exporting it to a media that says it has square pixel obviously makes the video look 'narrow' on the X axis.

The only way I could edit this in Premiere and export it to MPEG (2 or 4), was to scale each source video up to 109.9% on the X axis (since 0.9091 * 1.09 is ca 1.0). Premiere doesn't allow me to say that the generated file as a pixel aspect ratio of 0.9091.

This works, but feels wrong. Especially if I have lots of source videos, to set the scaling factor on each of them.

Is there a better way to do this ?

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1 Answer

up vote 1 down vote accepted

If you're exporting directly from Premiere, then select the MPEG2-DVD NTSC preset in File -> Export -> Media, as shown in this image.

Also, it looks like MP4Box will allow you to change the pixel aspect ratio flag in a .mp4 without re-encode.

FYI: 720x480 with PAR 0.9091 @ 29.97fps is the NTSC DV standard resulting in a 4:3 display aspect ratio. Similarly, 720x576 with PAR 1.0667* @ 25fps is the PAL DV standard.

*The actual PAR is supposed to be 59/54, but many apps use 16/15. See here if you're interested.

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You really know your stuff! Thanks! –  olafure Mar 17 '12 at 19:19
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