Plz help, Getting the correct aspect ratio

[GEO187]

I am trying to encode some divx films i hav, using tmpgenc, so that i can burn them to dvdr. I would just like to kno how i can find the exact aspect ratio of my divx film, is there a proggie that will do it. I hav tried various methods and I still only hav the resoulution, however I need the aspect ratio for tmpgenc, wheter it would b 16:9 pal, ntsc or display.

Ne help would b much appriciated!

[benderman]

Width devided by hight is the ascpect ratio and DivX-movies often have other aspect ratios than 4:3 or 16:9. Nearly all PC-videos use pixels that are square (same width and hight). Then you only have to add black bars at the top and bottom of the video to get closest to 4:3 or 16:9. Then you have to resize the video to the size you need for creating a (s)vcd or DVD.

[GEO187]

cheers, i will try that, wot would i use to resive it, or add black bars? TMPGenc??

[benderman]

VirtualDUB may give the best results, but normaly tmpgenc is good enough to do the job. If the avi-video is shown with the correct aspect ratio in your favourite avi-player, tmpgenc should work if you select "1:1 (VGA)". It should resize and add the bars automaticly.

[Qyd]

Re: Plz help, Getting the correct aspect ratio

Originally posted by GEO187
I would just like to kno how i can find the exact aspect ratio of my divx film, is there a proggie that will do it.

gspot will tell you the approximate aspect ratio :xy :624 x 464 (~ 16 : 12 )

[ChristianHJW]

Download 'The Gordian Knot' from http://www.doom9.org downloads page, it will find out the correct AR of the original DVD if you create a .d2v project file with DVD2AVI first ....

[shiny#3]

as said before:

aspect ratio is width /height

as most divx encoders cut out the black bars on top and bottom

the movie often has its original width of
720

e.g. 720x288 or something like that.
If it is an ntsc divx video
then it is simple
just add a black bar with 720x96 on top
and on bottom to regain your original dvd
aspect ratio of 720x480
<--- 288+96+96 = 480

if it is a Pal divx video
the original resolution might have been 720x576

so add two black bars with the size

720x144 <-- 288+144+144 = 576


If the divx movie has another resolution like 640x280
the original encoder has maybe resized it because the source was anamorph or
has chopped it for some resolution / quality / bitrate ratio.

in that case you can use Fitcd to regain
a proper DVD compliant aspect ratio.

Or you can do a little 2. grade math on that also