Resizing aspect ratios

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Resizing aspect ratios

Postby Bushido Philosopher » Sun Jan 05, 2003 9:39 pm

I need a little bit of help maintaining aspect ratios.
Some of the video I want to clip off the black bars, but I'm not quite sure of the aspect ratio, and if I did, I wouldn't know how to convert it anyway.

So can anyone point me to like a little tool or method where I can input the ratio, then it'll give me all the resolutions that it corresponds to?

And this part is for klinky:
it would be great if that Misato Aspect tool that you gave me could be modified to do this.

Thanks everyone.
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Re: Resizing aspect ratios

Postby CArnesen » Sun Jan 05, 2003 9:47 pm

Ko Oh Yoku wrote:I need a little bit of help maintaining aspect ratios.
Some of the video I want to clip off the black bars, but I'm not quite sure of the aspect ratio, and if I did, I wouldn't know how to convert it anyway.

So can anyone point me to like a little tool or method where I can input the ratio, then it'll give me all the resolutions that it corresponds to?

And this part is for klinky:
it would be great if that Misato Aspect tool that you gave me could be modified to do this.

Thanks everyone.


There is a really awesome tool (if you have Windows)... It's called Calculator...

I use it for exactly what you are describing and it works wonders! TWO THUMBS UP!!
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Postby Bushido Philosopher » Sun Jan 05, 2003 10:00 pm

ok sarcasm aside, how would i do that??
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Postby klinky » Mon Jan 06, 2003 1:46 am

<a href="http://klinky.home.attbi.com/MisatoAspect.exe">MisatoAspect v2!</a>


I slaved over this, well actually uhh programmed it during commercials for Malcom in the Middle & Andy Richter *TWO OF THE FUNNIEST SHOWS ON TV*.

Tell me if it breaks.


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Postby RadicalEd0 » Mon Jan 06, 2003 8:09 pm

Aspect Ratio: 12:7 / 1.85:1

12/7 = 1.7142857142857142857142857142857
37/20 = 1.85

what aspect ratio calculation method are you using sir it is quite faulty :O
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Postby Bushido Philosopher » Tue Jan 07, 2003 5:31 pm

he's right.
all that is really correct are the 16:9 and 4:3 ratios.

and one more question:

if a movie is not labeled in what apect ratio it is, is there any way to tell what aspect ratio it is in?

since all DVDs are formatted to 720x480, and then the players resize it to whatever ratio it is, then there's no real way i can tell what ratio it is transferred to, is there?
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Postby RadicalEd0 » Tue Jan 07, 2003 5:47 pm

I sent klinky some source code for a perfect conversion decimal - integer AR
Anyway, yeah you could tell what the AR of your movie is. If you have no other means of finding out, you could always

Anamorphic:
go open the movie in vdub. Resize to 640x360 and play around with null transform until you crop out all the top/bottom bars. Check the output resolution and divide w/h (640/ whatever). That'd tell you the decimal AR.

Letterbox:
open in Vdub and resize to 640x480. Play with null transform until you crop out all the top/bottom bars. Check the output resolution and divide w/h (640/ whatever). That'd tell you the decimal AR.
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Postby Jebadia » Tue Jan 07, 2003 5:50 pm

simple, read the video info on the DVD case, it it says widescreen, i'ts 16:9, unless its letterbox where it's widescreened by using 4:3 to scale it properly. Widescreen is generally scaled to 16:9, so here are some resolutions you can use.

720x360 or 720x400 (Ermac's says 720x360, but I don't really know if would make much of a difference?)
704x384
672x368
640x352
608x336
576x320
544x304
512x272
480x256
448x240
352x192
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Postby RadicalEd0 » Tue Jan 07, 2003 5:58 pm

no steak noono thats not his question. He wanted to know how to tell the actual aspect ratio of the video itself not the playback ratio of the DVD. Like when a movie is 1.85:1 on a DVD they add black bars to the top and bottom and encode it as 16:9 (1.777:1). So if the movie was like 2.35:1 the only way to tell (other than finding info about how the movie was encoded) is to check the real AR like I described.
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Postby klinky » Tue Jan 07, 2003 6:02 pm

Yes the link is to a new version :O


Much thanks to Mr Radical...

Just down the latest version, should be v3(double click misato to find the version #).

incase you're lazy:

http://klinky.home.attbi.com/MisatoAspect.exe


Yes and it was my silly algorithm screwing it all up.

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Postby Jebadia » Tue Jan 07, 2003 9:49 pm

Oh my bad, yeah movies like Phantom Menis had 1.85:1.
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Postby Bushido Philosopher » Wed Jan 08, 2003 2:45 am

whoa klinky, people actually go to resolutions that high???
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Postby klinky » Wed Jan 08, 2003 2:52 am

You never can be too careful :]
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Postby RadicalEd0 » Wed Jan 08, 2003 6:34 pm

so klinky, you planning on making this tool opensource by registering with the GNU and adding it to sourceforge.com?
:p
I'll join you with the SHR audio converter :p
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