De-interlacing an edited Video

Dimeworth wrote on 12/12/2003, 8:05 AM
Listen guys, I'm in a it a of a jam

I have a video that's edited and rendered out to an mpeg, from a few months back. I just noticed that it's interlaced. Is it possible for me to remove the interlacing now?

I don't really understand this stuff very well.

It's really important that I do it now. I can't go back and re-edit it all. I have to find a way to safe this copy. If someone can give me a run through on what to do I'd REALLY appreciated it.

my email is dimeworth@hotmail.com if someone takes pity and decides to walk me through it lol

This is very important. I'll be forever indebted to the person who helps me out heh.

-Ayz

Comments

Spot|DSE wrote on 12/12/2003, 8:27 AM
If it's in MPEG mode, you really can't deinterlace it well without losing lots of quality.
If you have the master avi, you can do this, by changing the project properties to 'progressive scan,' and set the deinterlace method to 'blend'.
YOu could also put this into Media Studio pro, use two tracks, and set one to 50% opacity. But, you'll take a huge hit on quality as it's compressed media being recompressed.
Dimeworth wrote on 12/12/2003, 8:57 AM
Aw damn. It is in mpg. How much of a quality loss are we talking about? What if i convert it to avi?

I'm desperate.

Thanks for your answer spot!

-Ayz
Spot|DSE wrote on 12/12/2003, 9:09 AM
Converting to avi and converting back to mpg are effectively the same thing.
It's a baked cake. You can't remove the nuts or put more sugar in once it's baked without breaking the quality of the cake...Only you can decide if it's a worthwhile loss. Render a small section of the highest motion and then decide.
Dimeworth wrote on 12/12/2003, 9:11 AM
Ok i'll do that. What do you recommend then? render it to AVi and change it to "progressive scan" or.... double it up in mpg and 50% opacity?

What would make more sense?

-Ayz
johnmeyer wrote on 12/12/2003, 9:42 AM
Why do you want to de-interlace? This is seldom really needed. See this site for a very cogent explanation of when to de-interlace:

www.lordsmurf.com

Short version of what you'll find there: If you are going to view on a TV set, don't de-interlace.

P.S. The link above has been corrected since my original post so that it now works.
Dimeworth wrote on 12/12/2003, 9:56 AM
The page isn't working.

It's actually going to be screened at a festival digitally. So should I de-interlace?

-Ayz
johnmeyer wrote on 12/12/2003, 1:22 PM
"The page isn't working."

That's weird. I checked the link (by clicking on it) immediately after posting and it worked. Now when I click on it, it fails. I wonder if Sony has changed something that blocks outbound links?

I went back and edited my previous message so it shows the actual URL for the site. You can cut and paste the link and it will work. The site is definitely up.
jetdv wrote on 12/12/2003, 1:38 PM
No. You forgot to add the "http://" to the front so it THINKS you are trying to reference a "sony" page.
johnmeyer wrote on 12/12/2003, 2:13 PM
No. You forgot to add the "http://" to the front so it THINKS you are trying to reference a "sony" page.

Bingo. You are absolutely correct. Give that man a cigar.

The reason for my error is that lordsmurf has disabled all copying on his page. Usually, when I provide a link in these forums, I just copy from the address bar and then paste. That way I know that works. This time, I just typed it in, and I forgot to include the http since that's not normally needed when typing addresses in a browser.

I'll go back and change my original post so that it works.
farss wrote on 12/12/2003, 2:26 PM
To answer the real issue here,
NO.
I can imagine no reason why you should de-interlace it.
I can think of plenty of reasons why you should NOT de-interlace it.

Someone may care to correct me on this BUT unless the footage was originally progressive i.e. shot on a video camera capable of true progressive or from film then any attempt to convert to progressive is going to involve a serious quality hit. If it was shot progressive then even though it's now technically interlaced it's still actually progressive. You can de-interlace and remove pulldown to create what is true 24fps. Only delivery medium then is DVD or film.
Dimeworth wrote on 12/12/2003, 8:46 PM
Thanks.. I got it figured now I think.

I didn't even have to do anything it turns out. It's good to go... I just made a mistake. Thanks for all your help guys!

the short in question is for Kevin Spacey's triggerstreet festival. It made the top ten, and has been invited to SUNDANCE. I just got paranoid over quality of the highres.

Check it out at my site www.dimeworth.com

Thanks again to everyone who replied..

-Ayz
snicholshms wrote on 12/13/2003, 12:40 PM
If you want the film look (and have a savings account!!) you could look at a product named Magic Bullet. It has great reviews in in the industry mags but the cost is a little ridiculous...more than Vegas & DVDA with Sound Forge combined.