Comments

sdmoore wrote on 3/8/2003, 3:38 PM
Just when I thought I understood pixel aspect ratios ...

http://www.uwasa.fi/~f76998/video/conversion/

Well, using the pixel aspect ratios in the section 3 table on the above link I can get 1.0926 by dividing ( 128/117 ) by ( 768/767 ) ... this seems to be the ratio of "720x576 pixel ratio" to "768x576 pixel ratio". I'm still none the wiser about why the difference in Vegas and Premiere (and many other apps) ... Hmm, guess I'll have to read through the above link (my brain's going to hurt! 8o)

Cheers,

Scott
riredale wrote on 3/8/2003, 5:47 PM
This is a common topic on this board. If you are curious, pour yourself a nice glass of wine tonight and search on "aspect ratio."

The one thing I learned that surprised me is that DV is NOT defined to be a 4:3 aspect ratio. It's actually a little bit wider. DV is defined to be a 480:720 matrix with each pixel having an aspect ratio of .9091. These figures are for NTSC countries; I don't remember off-hand the specs for PAL DV.

As for Adobe, perhaps they derived their numbers coming from another direction, but I also think they are incorrect. These SF guys know their stuff.