Welcome to Doom9's Forum, THE in-place to be for everyone interested in DVD conversion.

Before you start posting please read the forum rules. By posting to this forum you agree to abide by the rules.

 

Go Back   Doom9's Forum > Announcements and Chat > General Discussion

Reply
 
Thread Tools Search this Thread Display Modes
Old 1st February 2009, 15:32   #1  |  Link
Nazgulled
Registered User
 
Join Date: May 2002
Location: Hell
Posts: 119
Is there a difference between Xvid, DivX and ffdshow for divx/xvid decoding?

Hi,

Basically, what the titles says... For decoding only of video content in XviD or DivX formats, is there a difference in picture quality between using XviD, DivX or ffdshow decoders?
Nazgulled is offline   Reply With Quote
Old 1st February 2009, 17:28   #2  |  Link
Esurnir
Registered User
 
Join Date: Jun 2008
Posts: 143
Quote:
Originally Posted by Nazgulled View Post
Hi,

Basically, what the titles says... For decoding only of video content in XviD or DivX formats, is there a difference in picture quality between using XviD, DivX or ffdshow decoders?
There -may- be a difference in the iDCT chosen between each decoder, from what I know ffdshow choose an iDCT different depending on the fourcc of the input.

But -overall- if the iDCT match the dct of the encoder (and problems in case of mismatch are most of the time marginal) the output should be exactly the same between each decoder.

Now ffdshow is a bit better in my opinion since ffdshow can apply post processing filter which help a lot to "enhance" your picture quality.

So in a way ffdshow "give" a better picture quality but post processing "modify" the picture to make it different than what the video data said to output:
Deblock it (there is no deblocking filter in Advanced Simple Profile so you have to do it yourselff), Sharpen it, etc.

Last edited by Esurnir; 1st February 2009 at 17:30.
Esurnir is offline   Reply With Quote
Old 1st February 2009, 21:54   #3  |  Link
Nazgulled
Registered User
 
Join Date: May 2002
Location: Hell
Posts: 119
Ok, thank you!
Nazgulled is offline   Reply With Quote
Reply

Tags
decoding, divx, ffdshow, picture quality, xvid

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT +1. The time now is 18:32.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.