I will try to clear a bit the mystery with aspect ratios. In some aspects I can be wrong, then excuse me in advance
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The 4:3 TV shows the picture in aspect 1.33:1 (4/3=1.33(3)). But 720x576 is not 1.33:1 at all, it is 1.25:1. Therefore the player keeping the vertical resolution at 576, stretches the horizontal to 768! The same is with vertical resolution at 544 (still low stretching to 76
, 480(middle stretching) and 352 (high stretching). So it correspond to the quality of the picture - better with low stretching and worst with high. For 352x288 the player stretches the picture in both directions - to 768 horizontal and 576 vertical - that is the worst scenario and correspondingly we have the lower quality picture.
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My question is how do I put correct aspect ratio into mpeg?
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If you put the same width and height as the avi the aspect will be correct, but not on the TV.
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Read
here question 62 and maybe 63. I think you will get it.
BTW the black bands at VCD or SVCD resolutions are absolutely the same...