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Converting uncompressed and sound sync problems? [WIP]

Posted: Sat, 8th Sep 2007, 5:27pm

Post 1 of 8

Evman

Force: 4382 | Joined: 25th Jan 2004 | Posts: 3609

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The title pretty much says it all really.

I converted the massive 90 something GB uncompressed version of AI2 using the DVD setting on Videowrap. Now when I play it in Quicktime, the audio slowly gets more and more off sync (noticeable within the first few seconds). I thought that it might be my computer being unable to handle playing it, but then I put it into Premiere and rendered a little piece off the front and the audio stayed out of sync.

Any help would be appreciated.

EDIT:

I just tried the same thing again with a smaller file and the same thing happened.

I checked the times and realized that the AI2 file is just about 54 minutes... That is where the audio stops. The video, on the other hand, plays until 62 minutes... so it's going in slightly slow motion.

On the second thing I tested, the original video is about 8 minutes and ended up being 10-11 minutes... whereas the audio again cuts out around the length of the original file.

DOUBLE EDIT:

I've discovered that the problem happens regardless of whether I'm exporting to DVD or not. I tried converting to a flash template page and the same thing happened (I'm uploading that example now).

After trying Quicktime and DV AVI codecs and not running into the issue, I've come to the conclusion that only uncompressed AVI files have this problem. I'm uploading an example right now and will post it here once it's up.

TRIPLE EDIT:

Here is an example of what I'm talking about... It's not entirely evident until 45 seconds in, as there's no distinctive dialog or sound effects until then.

http://www.de-evolutionstudios.com/Clips/TWInternet/index.html

PLEASE help.
Posted: Sun, 9th Sep 2007, 4:19pm

Post 2 of 8

Evman

Force: 4382 | Joined: 25th Jan 2004 | Posts: 3609

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*Echo* Anyone? *Echo*
Posted: Mon, 10th Sep 2007, 7:19pm

Post 3 of 8

Joshua Davies

Force: 25400 | Joined: 21st Mar 2001 | Posts: 3029

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FXhome Team Member

Aha! Only uncompressed AVIs?

Uncompressed AVI and QuickTime support was almost not included with VideoWrap (they are not supported on the Mac) due to them being rather annoying compared to the other codecs and causing lots of problems.

We'll look in to it and see what we can do.
Posted: Mon, 10th Sep 2007, 7:26pm

Post 4 of 8

Evman

Force: 4382 | Joined: 25th Jan 2004 | Posts: 3609

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Thanks, it's not so much a problem of new stuff I do (I can export those as DV AVIs or whatnot), but most of the old files that I want to compress to save space are Uncompressed AVI.
Posted: Mon, 10th Sep 2007, 7:32pm

Post 5 of 8

Joshua Davies

Force: 25400 | Joined: 21st Mar 2001 | Posts: 3029

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FXhome Team Member

Wow, that must use a lot of hard disk. I have 4.4TB but i still couldn't save stuff as uncompressed.

Cogz will look in to it as the uncompressed engine was his baby. He'll do his best to fix any problems I assure you.
Posted: Tue, 11th Sep 2007, 1:24am

Post 6 of 8

Evman

Force: 4382 | Joined: 25th Jan 2004 | Posts: 3609

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Yeah, I recently have one of my entire drives fail. The normal C-Drive was too cluttered to be able to fix the mess and the whole computer almost died. We got a bigger drive installed, and salvaged all the files, but I really learned I need to compress everything... (lucky Videowrap came out literally a day after we got the computer fixed... so I'm just waiting on being able to shave the GBs off! biggrin )
Posted: Tue, 11th Sep 2007, 4:27pm

Post 7 of 8

Joshua Davies

Force: 25400 | Joined: 21st Mar 2001 | Posts: 3029

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FXhome Team Member

Uncompressed has been locked out of the update for now until we work out a better solution. Thanks for the heads up.
Posted: Thu, 13th Sep 2007, 5:31pm

Post 8 of 8

pscamm

Force: 2225 | Joined: 5th Nov 2006 | Posts: 300

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Hi All,
I certainly would like support to videoWrap uncompressed AVI's (pc). I sometimes do 3D animation ( especially content for compositing in CLabPro over live footage ), i find that uncompressed elliminates the artifacts which makes compositing much easier. But, & this is where VideoWrap will come in, if i wanted to put up one of these anims on youtube it'd be nice to convert straight from uncompressed & that way ill get the best quality result. Just a thaught biggrin

Great product guys anyway

Best Wishes

Paul