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 > Capturing and Editing Video > Avisynth Usage

Reply
 
Thread Tools Search this Thread Display Modes
Old 20th December 2008, 00:25   #1  |  Link
chaynik
Registered User
 
Join Date: May 2002
Posts: 87
Any way to deinterlace incorrectly uprezzed interlaced footage?

I'm dealing with some 1080i material that has certain archive footage clips badly upconverted from SD. The result is what you get by just taking interlaced video and blowing it up assuming it's frame-based, all field relationships are broken and you get nasty sawtooth artifacts (not the regular combing).. My goal is to remove it and I've tried all kinds of combinations of resizers (nearest neighbor/pointresize as well hoping that it would just discard every other pixel/line and restore the bad upconversion), as well as multiple SeparateFields(), etc. No luck.

Here's a sample clip in huffyuv format:
http://rapidshare.com/files/17500495...laced_pan2.avi

Thanks in advance!

Last edited by chaynik; 20th December 2008 at 00:29.
chaynik is offline   Reply With Quote
Old 20th December 2008, 01:04   #2  |  Link
setarip_old
Registered User
 
setarip_old's Avatar
 
Join Date: Aug 2005
Posts: 16,270
Hi!

You might consider uploading a clip that's smaller than 150Mb...
setarip_old is offline   Reply With Quote
Old 20th December 2008, 01:20   #3  |  Link
Guest
Guest
 
Join Date: Jan 2002
Posts: 21,922
Don't bother. You can't fix that.
Guest is offline   Reply With Quote
Old 20th December 2008, 01:27   #4  |  Link
chaynik
Registered User
 
Join Date: May 2002
Posts: 87
It's actually only ~5 seconds of footage. Any shorter and I'm afraid it wouldn't be enough to experiment with...

The link I provided is using TrafficShare, so anyone can download it freely without any waiting time and bandwidth caps.
chaynik is offline   Reply With Quote
Old 20th December 2008, 01:31   #5  |  Link
chaynik
Registered User
 
Join Date: May 2002
Posts: 87
Quote:
Originally Posted by neuron2 View Post
Don't bother. You can't fix that.
Thank you for the reply, Donald! Shouldn't it be theoretically possible when knowing the source res (720x480) and destination res (1920x1080) to predict how the upscaler interpolated the missing pixels to achieve the resize? And knowing that, somehow reverse it?
chaynik is offline   Reply With Quote
Old 20th December 2008, 01:40   #6  |  Link
Guest
Guest
 
Join Date: Jan 2002
Posts: 21,922
The resizing has blended information from two fields. There is no way to unblend it.

Consider: We start with A and B. I give you only C where C=(A+B)/2. How can you recreate A and B?

Where did this material come from?

Last edited by Guest; 20th December 2008 at 01:45.
Guest is offline   Reply With Quote
Reply

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 19:03.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2020, vBulletin Solutions Inc.