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H264 for iPod may be larger than 320 pixels wide
Authored by: AdamF_MacGuy on Feb 22, '06 11:32:09AM
Below is a guide for saving H264 and MPEG4 movies at higher video resolutions based on their aspect ratios for viewing on iPod Video

MPEG4 Aspect Ratio Resolutions*
*(230,400 Pixels Max)

720 x 304 - 2.35:1 (Anamorphic = thicker letterbox bars)
624 x 336 - 1.85:1 (Academy Flat = thinner letterbox bars)
624 x 352 - 1.78:1 (16x9/U.S. Digital Television = thinest letterbox bars)
512 x 384 - 1.33:1 (4x3/NTSC Analog Television = no letterbox bars)

H264 Aspect Ratio Resolutions*
*(76,800 Pixels Max)

432 x 176 - 2.35:1 (Anamorphic = thicker letterbox bars)
368 x 192 - 1.85:1 (Academy Flat = thinner letterbox bars)
368 x 208 - 1.78:1 (16x9/U.S. Digital Television = thinest letterbox bars)
320 x 240 - 1.33:1 (4x3/NTSC Analog Television = no letterbox bars)

If you need help deciding what aspect ratio the video content was created in, this site has a lot of useful info... Widescreen-O-Rama
Also, all resolutions listed above conform to the macroblock units previously discussed (in order to avoid screen flickering).

Hope this helps.

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