Divx, Xvid questions

[maartendc]

Hey all,

I've got a few questions concerning Divx and Xvid.

I recently downloaded a movie with a corrupted sector at the back. After the corrupted sector the sound and video don't play simultaneously. Is there a way to fix this? The movie is in Xvid format.

I've also got a few .mpg files that I'd like to burn to discs. But I was wondering if I could compress them with some codec so that they would become smaller and maintain quality. I've tried ecoding to divx, but the files end up larger then they were before in mpg. Is there any setting I should change? I've tried Virtualdub for this, but I'm not at all familiar with this program...

ANy help would be greatly appreciated.

[Krell]

Just like the last 1/2 dozen people that wanted to use VirtualDub, the answer is, get familiar with it.

VirtualDub will allow you to rekey the file, but that doesnt garantee that is the fix. This will take quite a while to do.

All of these file are already about as compressed as they can be, and I am not sure why you want to reduce an mpg file size, but if fitting it on a CD is the issue, let's address that seperately.

Tmpeg will restream then for you, as will a few other apps. The lower the bitrate, the lower the quality.

[maartendc]

Originally posted by Krell
Just like the last 1/2 dozen people that wanted to use VirtualDub, the answer is, get familiar with it.

VirtualDub will allow you to rekey the file, but that doesnt garantee that is the fix. This will take quite a while to do.

All of these file are already about as compressed as they can be, and I am not sure why you want to reduce an mpg file size, but if fitting it on a CD is the issue, let's address that seperately.

Tmpeg will restream then for you, as will a few other apps. The lower the bitrate, the lower the quality.

Nah, I just wanted to put several .mpg's on one dics... I thought .avi's were smaller than .mpg... but apperently not.

As for virtualdub, could you give me a setting I should look for in particular if the one you suggested doesn't work? Anything at all?

Thanx for the fast reply btw.

[Krell]

Theres no hard and fast rule as to which is larger or smaller, it depends on who what and how.

Here are some threads discussing (bitching) about your topic.

http://forums.afterdawn.com/thread_view.cfm/21345

http://forums.afterdawn.com/thread_view.cfm/19558


Some repair stuff

http://divxstation.com/article.asp?aId=39

http://www.divxrepair.subnet.dk/?noframe

http://www.how-to-create-divx.com/Virtualdub/virutaldub.htm

.

[Theinfamousone]

MPEG is a way older form of compression than the avi codecs used today, so therefore you are likely to get better quality at the same file size or smaller file sizes with the same quality (I'd say that's true in general wouldn't you agree Krell?)

I also wouldn't reencode to avi just to make it smaller. You lose quality, and for how cheap CDs are, it's just not worth losing the quality.

You may not be able to afford a DVD burner, but they save a lot of headache in these matters. I remember spending hours upon hours worrying about file sizes, now I can throw 6 or 7 full quality divx movies on a 60 cent DVD and never worry about the size or format. I can fit between 15 and 60 TV shows depending on the length and quality.

I believe the reason your file is bigger when going to divx or xvid or whatever it was is because the audio is not compressed (probably). You need to make sure that you do not do direct stream copy of the audio, use the mp3 codec, you can probably use 96kbps - 160 kbps depending on how good the original quality is (if it was already crappy, I wouldn't worry about using a high bitrate).

[CCSDUDE]

Theinfamousone...

Mpeg1 is a standard....and if encoded properly wipes the floor with DivX...mpeg2 does the same...

And they all handle things in a different way...comparing them just because ones newer means nothing.

Anyway, maartendc just use Tmpeg to chop the movie up and fit it on 2 CD's....

Don't bother converting it to Divx or any other format...

It's the same as an Mp3.....re-encoding anything from a lossy source makes it even worse.

So either buy a DVD Ram drive or chop 'em up....

And if you have a bad keyframe...your SOL you'll have to re-encode the movie or add a 'polish' keyframe using Vdub and the direct stream copy command...it'll seek slow as hell. (This only applies to AVI's mpeg's don't have needed start and end info and each 'block' of data has it's own marker....same with mp3's)