Correct target video size of an exported DVD video

I am trying to encode a video track from a DVD with wide-screen content to an MP4 file using the H.264 codec. What video frame size should I choose for optimal quality and minimal file size, 720 x 404 or 856 x 480? Or, if there is a way to do it, should I choose 720 x 480 with a 120:101 non-square aspect ratio pixel?The software I would use would be MPEG Streamclip, exporting with QuickTime 7 Pro.

I am trying to encode a video track from a DVD with wide-screen content to an MP4 file using the H.264 codec. What video frame size should I choose for optimal quality and minimal file size, 720 x 404 or 856 x 480?
If the source DVD is an anamorphic encode and you are using MPEG Streamclip for the conversion, then the app would normally default to 854x480 assuming the file is not being cropped. If the DVD is a letterbox widescreen encoding, then the 720x404 dimensions would probably be your best choice. With regard to the 720x480 dimensions, all NTSC DVDs use the 720x480 matrix for encoding both 4:3 and 16:9 aspect content.
Or, if there is a way to do it, should I choose 720 x 480 with a 120:101 non-square aspect ratio pixel?
If you want to replicate the original storage matrix and PAR encode the file, you might be better off using HandBrake here. It will normally encode anamorphic DVD content using the 720x480 matrix and set the correct PAR value to reproduce the correct viewing aspect ratio even if the content is automatically cropped by the application.

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Correct target video size of an exported DVD video

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