keep the same ratio

[Klingon00]

is there a tool out there that would tell me the ratio of the movie? cause the software i am using doesn't have a ablitlity to select "full screen keep aspect ratio" so i have to enter the correct number if i don't want the image to be streched to much.

[flaninacupboard]

well, work it out. you know your output file will either be 1.333:1 (normal TV) or 1.777:1 (wide TV)
they are the only two aspect ratios you will ever need to know for dvd conversions.

[Vejita-sama]

First, Gspot (look under tools or at doom9.org) can tell you all this.

However, as far as display aspect ratios go. That's a bit more of a mess. There are 3 that you are likely to run into:

1:1 (PC)
4:3 (standard tv)
16:9 (wide screen TV and film)

However, widescreen TVs have an actually DAR of 1.77:1 and films come in either 1.85:1 (academy flat) or 2.35:1 (anamorphic scope).

VHS, VCD, and SVCD have a DAR of 4:3 ONLY. That means to display film sources at the correct aspect ratio you have to letter box your video. But DVDs can be anamorphic. You flag a DVD as either 4:3 or 16:9.

A 2.35:1 encoded anamorphic DVD actually has little black bars encoded as part of the video (sort of a pseudo-letterboxing). Otherwise even on a widescreen TV the picture would look distored (widescreen TV 1.77:1).

So depending on your source, and what you are trying to encode too there can be a lot more variables in play


Take a look below for more info:

http://www.doom9.org/aspectratios.htm

http://www.thedigitalbits.com/articles/anamorphic/aspectratios/widescreenorama.html