Mobile/PDA About Us Advertise here
User User name Password  
  Not registered yet? Register here.
Lost your password? Click here. 		 
  Home   News   Guides   Downloads   Glossary   Hardware   Profiles   Forums   v4  
 Advertise at AfterDawn.com     Link to us!     Private messages     Compose a private message     List of all updated threads     Threads without replies     Search messages
Saturday 27.9.2025 / 01:43
Search AfterDawn Forums:        In English   Suomeksi   På svenska
afterdawn.com > forums > archived forums > divx / xvid > resolution and aspect ratio question
Show topics
 
Forums
Forums
Resolution and Aspect Ratio Question
  Jump to:
 
Posted Message
Saber9
Suspended due to non-functional email address
_ 		20. May 2006 @ 06:34 _ Link to this message    Send private message to this user   
I have a Xvid encoded copy of a movie I own. The original aspect ratio was 2.40:1 with the standard 720x480 resolution. The Xvid video has a resolution of 640x256 and the aspect ratio says 2.50:1. Does this mean that a little bit of the movie is being chopped off? Could someone please explain? Thanks.
[ + quote]
Advertisement
_ 		__
aldaco12
AfterDawn Addict
_ 		23. May 2006 @ 03:05 _ Link to this message    Send private message to this user   
It simply means you'll have to add black bars in the video, to see fully the movie screen.

For example, load that AVI with VirtualDub.
Add the 'resize' filter (Video___Filters__Add) and multiply the video bt 720/640 = 1,125 = 9/8.
Therefore choose:
- new width = 720 (9/8*640; it will make 720 by construction)
- new heigth = 288 (9/8*256)
as 'filter mode' you can choose a 'precise bicubic', but I choose 'Lanczos3'. Please note that the aspect ratio is not alterated (just a 'by 9/8 multiplication').

Then check the box 'expand frame and litterbox image' and set
- Frame width = 720
- Frame heigth = 480
Look at the output screen (right) in VirtualDub. Can you see it?
The movie is not chopped off.
Well, a little screen (30 pixels E and W) will be lost, but this is a problem of the 4:3 dislay with respect to a 16:9 display...
[ + quote]
Saber9
Suspended due to non-functional email address
_ 		25. May 2006 @ 08:20 _ Link to this message    Send private message to this user   
Ok thanks for the help and I did all that but how do I save it so I can then burn it to a CD?
[ + quote]
SOCOMII
Senior Member
_ 		25. May 2006 @ 11:53 _ Link to this message    Send private message to this user   
FILE > Save as AVI.
Also set the sound to direct stream copy and the vdieo i think you will have to set to full procesing mode and set up XviD again. but correct me if im wrong.
[ + quote]
Advertisement
_ 		__
 
_
celtic_d
AfterDawn Addict
_ 		25. May 2006 @ 20:52 _ Link to this message    Send private message to this user   
Could mean that pixels were cropped or it was badly resized.
I wouldn't recommend using VDub filters. It slows down encoding and results in lower quality. Speaking of lower quality though, I wouldn't recommend re-encoding from your XviD source. Use the original source and encode again.

Keep in mind though that the resolution should be mod16. So basically you have a toss up between keeping it mod16, cropping pixels, having a AR error or keeping black pixels. Best is not to resize at all and set the PAR appropriatly so that it displays the correct AR on playback (much the same as the original DVD). Still usually means cropping pixels to keep it mod16.
[ + quote]
afterdawn.com > forums > archived forums > divx / xvid > resolution and aspect ratio question
 

Digital video: AfterDawn.com | AfterDawn Forums
Music: MP3Lizard.com
Gaming: Blasteroids.com | Blasteroids Forums | Compare game prices
Software: Software downloads
Blogs: User profile pages
RSS feeds: AfterDawn.com News | Software updates | AfterDawn Forums
International: AfterDawn in Finnish | AfterDawn in Swedish | AfterDawn in Norwegian | download.fi
Navigate: Search | Site map
About us: About AfterDawn Ltd | Advertise on our sites | Rules, Restrictions, Legal disclaimer & Privacy policy
Contact us: Send feedback | Contact our media sales team
 
  © 1999-2025 by AfterDawn Ltd.

  IDG TechNetwork