Resizing AVIs (for DVD output) - calculations?

[bkcswot]

G'day all, :)

I'm relatively new to video encoding, and I have a question which I can't seem to find an answer for. I recently came across a guide outlining an AVI resizing process (http://www.doom9.org/mpg/avistretching.htm) and I'm a bit confused with converting the calculations supplied to PAL. According to the resizing guide, the DVD resolution for NTSC is 720x480, and I know that PAL is 720x576. Furthermore, according to the guide, the playback resolution for NTSC is 640x480 (which is calculated by (480x4/3)x480) - from this, I would assume that the playback resolution for PAL would be 768x576 (calculated by (576x4/3)x576). However, since the playback resolution for NTSC is smaller than its DVD resolution, and PAL's is bigger, I'm not sure if this is right.

So, can someone please confirm/explain this for me?

Also, that guide deals with a 2.35:1 video - if I was resizing a 1.85:1 video, would I still need to add the black bars?

Thanks in advance for any help provided. :)

[mgh]

FitCD (http://www.videohelp.com/tools/FitCD) will generate necessary avisynth script.

[bkcswot]

FitCD (http://www.videohelp.com/tools/FitCD) will generate necessary avisynth script.

Ah, rightio - that will come in very handy. Thanks a bunch. :)

[manono]

Hi-
However, since the playback resolution for NTSC is smaller than its DVD resolution, and PAL's is bigger, I'm not sure if this is right.
It's right for NTSC/PAL resizing of 4:3 DVDs. 16:9 DVDs are resized to 854x480 (NTSC), and 1024x576 (PAL).

And here's a pretty good guide for using FitCD to generate a script for DVD from an AVI source:

http://forum.videohelp.com/topic296341.html#1487285