avi problem

[akatelka]

hello!

i'm backing-up some avi files on a dvd-r media. i do not convert them into dvd's, just avi files on a dvd-iso forma. when i try to play them from the dvd-rom drive they produce skipping, jerky sound and video, and some of the files cannot be read at all. some of the files that can be read, when i copy them to the hard drive again, they are being played perfectly, some other files cannot even be copied at all. i tried reading the disc from another drive but same problem occurs.

thanking you in advance.

ps. it's not a media problem.. i've tried the exact same avi's on different media but same things happen.. on some cases it even stopped the burning process, producing a failure message in Nero..

[Ironballs]

akatelka, I would suspect it's the media, but if you really think that's fine, perhaps your drive isn't up to playback of DVDs. On my laptop which has a DVD drive, I can;t playback DVDs, too jerky. If I rip to the HD then they play better.

Try your discs on another PC if you can and see if there is any difference.

Good luck

Ironballs

[thecoalman]

Your DVD drive can't transfer the data fast enough to play them for the ones that work from HD.

As for the ones that can't be copied see #2

https://www.videohelp.com/forum/viewtopic.php?t=253102

[akatelka]

driver's definately not the problem.. i have two different drives and tested in both of them.. i also have no problem with other dvd's or dvd-r's that i've written.. first time it happens is with these certain avi's... computer is not a problem as well, fully spec-ed, that is why i'm stuck so badly on this one !

(thanx for the help btw)

[sacajaweeda]

Copy the ISO to your hard drive then mount it with DAEMON Tools and see if you still get "skipping, jerky sound and video" when you play the files from your hard drive.

[jimmalenko]

If merely copying the files onto your hard drive from one of the burnt discs results in flawless playback, then it must be either media, the drives, a combination of the two, or possibly even a glitch in yous OS install (obscure, but a possibility). There's just nothing else it could possibly be IMO.

[mpack]

driver's definately not the problem.. i have two different drives and tested in both of them..

I've searched back, but I can't see a message that suggested that it might be your drivers. If this was a response to Thecoalman then please notice that he suggested (almost certainly correctly IMHO), that the problem is your DVD-ROM drive, not your drivers.

To be clear: there is probably nothing wrong with your drive, it is just that DVD drives can only transfer a certain number of bytes every second. If your AVI file requires a faster data rate for smooth playback (ie. because it is less compressed than an MPEG2 which the drive is designed to cope with) then you get jerky playback because the drive can't keep up. Hard disk drives are usually faster.

As to why some AVIs can't be copied: I'm guessing that would be a separate problem. What are the symptoms when you try to copy the file?

[junkmalle]

Make sure your DVD drive is running in DMA mode.

[akatelka]

driver's definately not the problem.. i have two different drives and tested in both of them..

I've searched back, but I can't see a message that suggested that it might be your drivers. If this was a response to Thecoalman then please notice that he suggested (almost certainly correctly IMHO), that the problem is your DVD-ROM drive, not your drivers.

i just mean "drive's"... by mistake i put the r. so what i mean is: "the drives (ie. dvdrom drives) are difinately not the problem" .

anyway.. i still back my opinion that it's not a drive thing... it can't be, as i did never have such problem in the past.. and another thing which i found out.. it's not with these certain avi files.. i tried different avi's and it does the same thing again.. don't know why... maybe nero got messed up somehow.. i'll now try a clean install of nero and see what happens..

thanx all again.

[akatelka]

nothing happened with clean installed nero.. i even uninstalled the dvd-recorder drive and reinstalled it.. nothing.. i tried writing a cd-r and it worked... what might be the problem ? could the dvd-r header in the drive be damaged ? or something like that ? out of nothing ?

[mpack]

anyway.. i still back my opinion that it's not a drive thing... it can't be, as i did never have such problem in the past..

Well, you have not said what has worked in the past: these exact AVI files on a data DVD, exactly as you are trying to do now?

This should be easily settled. Please tell us what audio and video codecs were used for the avi, along with the bitrates for both. VirtualDUB can tell you this - load the avi and select File|File information.

[funkguy4]

the way many programs will playback avi's is fill up their buffers and then attempt to refill them when they're about to run out. so, although your drives may be working as they ought to be, the seektime (which can be anywhere from 60ms - 300ms) could be what's killin' it. otherwise, it's too cpu intensive to look for something through your ide controller in that specific I/O mode and playback an AVI (which may very well be MPEG-4...somewhat more cpu intensive than mpeg-2) in realtimeon your computer. i'm not trying to bash your computer btw, just pointing this out as a possibility.

[junkmalle]

Did you check your DMA setting yet?

[akatelka]

well, here is an update on the situation.

i tried the discs on the same machine but on windows 2000 (on another partition)... same files produce same errors as previously (on windows xp).. so it's not an os problem i believe... i have also uninstalled and reinstalled the dvd recorder but same things happened.. i also checked some of the dvd discs that i have written in the past few days. in these discs some of the files (different files) produce problems again (and i reckon it's the last written file that produces the error!)! in some cases the error is either that its skips and produces jerky sound and video, in other cases it doesn't read the file at all, in other cases it struggles to read the file and when it finally does the length is wrong... on older dvd-r 's it doesn't produce any problems. all are different avi files written as dvd-iso. so can it be the drive ? is it damages ? but why if this is the case, when i can copy a damaged file on the hard disk it plays perfectly ? very strange.. the device manager says that it works on Ultra DMA Mode 6... what can i do ??

[funkguy4]

sounds like a media problem....try burning @ a slowre speed henceforth for that media

[thecoalman]

As I said before your DVD drive can't transfer the data fast enough to play it. I even ran my own little test and I get the same results as you jerky play back and I'm using an extremeley fast system...at least it was a year ago.

The reason your drive can play the other AVI's is that they are not of the same foramt. I don't even have to see the file info to tell you that. Your comparing apples to oranges.

Here's a simple little test for you to run, not completeley scientific but it will get the point across. Copy you AVI file from your DVD to your HD and time it with a stopwatch, compare it to the length that the clip is. You'll see that the length of time to copy is signifigantly longer than the play time. You can also try thios with the files that do play and you'll see that the copy time falls within the length of the video.....

There's nothing wrong with your video, just that your drive can't keep up with it. Matter fact I don't think they make a drive that fast due to the physical limitations of a disc. You can only spin it so fast before it explodes.

[thecoalman]

[akatelka]

ok.. i have one of the failed dvd discs. there is one file that the audio and video gets jerky AT EXACTLY the same positions each time i try it. not randomly. in exact same spots at all times. this file is exactly the same format as the other files that do play perfectly.

on that disc i also have a file that does not play at all. i don't know if it's random but the files that do not play at all (or play with wrong lengths) are always the last written ones on disc. i tried what you suggested. but i could not copy that file. it produced an error: "Cannot copy ......ata error (cyclic redundancy check)." the sizes of the files are not large.. about 350mb each maximum.

finally, as i also said, i used two different dvd-rom drives to test. the one that copied the dvd and another one. the drives by the way are the LG GSA-4081B dvd-recorder, and the pioneer dvd-106 dvd-rom. i tried two different media, princo and samsung... i always use these two brands so it's not the first time i use them. finally, there aren't any scratches at all on the media.

so, the question remains. is it a failure of the hardware ? or even if it's not, and it's what thecoalman said previously, how can i access my written data ?

[thecoalman]

OK my previous post could be wrong but that is just beacuse of conflicting information your giving such as....

but why if this is the case, when i can copy a damaged file on the hard disk it plays perfectly ? very strange.. the device manager says that it works on Ultra DMA Mode 6...

Which tells me the file is not damaged but can't be read from the drive fast enough. Not only that but your mixing two issues. See the thing is if your trying to play say a DV AVI it's not going to work. On the other hand if your trying to play a highly compressed AVI it will beacuse you can transfer it fast enough. Anyhow moving on....

The following advice is for fixing the corruption, if it doesn't I really have no other suggestions. Hope it helps.

1.Make sure the software you are using to burn with is has the latest updates
2.Update you DVD burner's firmware to the latest version.
3.Try burning at a slower rate.
4.Try some different discs, I know you said you have used those discs before but maybe you got a bad batch ....who knows.