Ar 4:3

[techz]

Why does GKNOT think that 4:3 means 1.37:1 and not 1.33:1 like it says on the box and which one should we follow, the GKNOT default or enter our own as 1.33:1

[manono]

Open GKnot. Go to the Options Tab. Uncheck the ITU-R Standard box. Go back to the Resolution Tab and see that it now says 1.333. There, you happy now?

But if you want to do it right, then go back to the Options Tab and recheck the ITU-R Standard box. Why? Read this:

http://forum.doom9.org/showthread.php?s=&threadid=42708

Scroll down about 20 inches or so to the paragraphs beginning:
The main reason for this thread though, is to post a reply that TheWEF made recently on the subject of the Pixel Aspect Ratio (PAR) and the ITU-R BT.601 Standard. In the Options Tab of GKnot is an option to check in order to resize to the standard. We often get questions about whether or not to check the box. Here is what he has to say on the subject:
and start reading. If you can make sense of it, you're a better man than I. I keep the box checked because TheWEF says it's the right thing to do. And so should you.

[techz]

the thing is i've read that before :) made no sense of it then, still dont get it. i'll just check the box and move on

BTW when they say tha for compatibility w should be multiples of 32, do they mean compatibility for graphics cards or something else :confused: , otherwise i prefer to reduce it to multiples of 4, i know i know u'll say that no no no stick with 32 or 16 or 8, i try to really but the 4 just gets the better of me, more 0% AR chance :rolleyes:

[manono]

Hi-

Yes, it means for graphics card compatibility. Matrox cards, especially, have trouble with non-standard resolutions.

i know i know u'll say that no no no stick with 32 or 16 or 8

You know me too well, already. :) Yes, but there is a good reason not to go below 16, and that is that MPEG4 encodes in blocks of 16 pixels, and you'll get a larger filesize (or lower quality for the same filesize) if you use mod 8 or below resolutions. That same sticky (which you've read) explains more about that. But it's said that you can't tell a bad AR unless it's above about 2%. And even with Mods 32/16 it's not hard to get below 0.5% AR Error. Don't worry about cutting into the video by a few pixels. And don't worry about not getting 0% AR Error.

Just my opinion, but since you asked, that's what you get. Maybe others have different opinions.