KVCD: NTSC to PAL Conversion, Resizing and Aspect Ratios

girv · #1 09-30-2003, 05:49 AM

I'm converting a 16:9 720x480 NSTC source to 16:9 PAL 704x576.

The active video area in the source is 716x360 and I want to resize that to 672 horizontally (before adding borders to bring it to 704x576), but I'm not sure how to calculate the destination height. A straightforward conversion would give 672x338 but my question is does the 338 change because I'm going from 480 to 576 total vertically? Should I resize to 672x406 instead? I mean, if the source video uses 75% of the source resolution vertical space then shouldnt the destination also use 75% of the destination resolution vertical space?

I suspect yes but I could never get my head around aspect ratios properly :) Bad Girv, naughty lazy Girv.

(BTW I know 338 and 406 should really be rounded to multiples of 8 or 16)

Cheers,
/girv

kwag · #2 09-30-2003, 06:44 AM

Hi girv,

Use Moviestacker, and enter 716x360 in the "Film pixel" fields.
It will then give you the correct resize for your target.

-kwag

girv · #3 09-30-2003, 07:09 AM

MovieStacker says: 672x416 ... so I was right :)

Thanks :)