Note that those PARs are from the ITU 601 standard, and it is apparently what adobe premiere uses also.
This guy gives an explanation as to why he, and many other encoders don't follow the spec http://homepage.ntlworld.com/seemoredigital/03_Video_Only_Info/Why_I_don%27t_follow_ITU601_specification.html (Note that he has at least two typos in his post that make two of his calculations wrong, presumably copy paste errors the first NTSC 16:9 should be 40:33; and in the second section it should be 32:27) LetterRip On Thu, Mar 11, 2010 at 1:52 PM, Tom M <[email protected]> wrote: > Looks like I opened up a can of worms :) > > To answer some questions it appears that there are true pixel aspect > ratios, and then there are approximate pixel aspect ratios that are > better for digital video editing software, and the true pixel aspect > ratios are defined differently by different groups. > > Based on my reading it sounds like we should be using the following > > NTSC 4:3 -> 10:11 > NTSC 16:9 -> 40:33 > PAL 4:3 -> 12:11 > PAL 16:9 -> 16:11 > > http://www.mir.com/DMG/aspect.html > http://en.wikipedia.org/wiki/Pixel_aspect_ratio#Pixel_Aspect_Ratio_of_Common_Video_Formats > > LetterRip > _______________________________________________ Bf-committers mailing list [email protected] http://lists.blender.org/mailman/listinfo/bf-committers
