Checking vob files

[Drakng]

Is there any software to check vob files for corruption? This would save alot of time viewing before ripping.

[northcat_8]

Actually the VOB shouldn't be corrupt before you rip it...if it is corrupt take the DVD back.

But more to your question.

Open "My Computer" goto tools>folder options..."file types" tab. Scroll down to the VOB file extention, highlight it and click the "change" button. Find your DVD player software and select it. Click "ok" all the way out.

Now you have set your PowerDVD or WinDVD software to be the default program for opening VOB files. You can now just explore the DVD and double click the individual VOB files and PowerDVD will open and just play that VOB file. Which will let you check it before you rip it.

[Drakng]

Not exactly what I have in mind!! Your suggestion is as good as viewing the show which is what I am trying to avoid.

[ImaWeTodd]

Where are the vob files and why do you think they are corrupted?

[Drakng]

Vob files are eiher on my dvd disc or the pc. I don't know whether they are corrupted or not which is why I am trying to check before actually doing a backup. Now, I am checking randomly by viewing which is no good
Is there a better way?

[ImaWeTodd]

Let's put this another way.

- A vob on a dvd is generally encrypted. You have to decrypt it with something like dvddecryptor to use it off the given disc.

- A disc may be scratched but if you can copy it to your hd, it is good.

- A vob file could be created by you and have some strange specs. This might give a transcoder some problems.

- I have never seen a corrupted vob. Don't know what that is. Probably could create a really weird one that doesn't play well.

This is why I asked why you thought they were corrupted. You still didn't say.

So here is my guess. You are not decrypting a commercial dvd. You are just trying to copy the file. This is sometimes called Ripping.

[Drakng]

Well if a picture is pixelated, stop/start, jerked , just like a vcd, would you called that corrupted? You means to say that you have never seen such a disc?

The reason why I post this thread is because I use DVDshrink to rip everything to my HD WITHOUT viewing it. So how can I checked the files before burning it with peace of mind?

[northcat_8]

You can download Daemon Tools to view the DVD from it's ISO file before burning but you will still have to flip through the chapters manually.

You are wanting a program kind of like a "virus" scanner that will just scan the files without you having to see them at all and tell you that they are either pixelated or OK quality wise? Sorry, I don't think one of those exists and I don't think one will be coming anytime in the near future because picture quality is in the eye of the viewer.

VOB files from the ORIGINAL DVD disc are not corrupt, they may be pixelated on your hard drive but that comes from DVD shrink's compression.

[ImaWeTodd]

Well if a picture is pixelated, stop/start, jerked , just like a vcd, would you called that corrupted? You means to say that you have never seen such a disc?

I was not clear how it could have gotten "corrupted". I assume you find this after DVDShrink has shrunk the dvd. Maybe after you have burnt the disc.

I usually attribute this to bad media. It could be DVDShrink, but you don't say you see this when you play it from your pc harddrive, or after you burn the disc.

[Drakng]

hmmn... no program to scan the vob files just like vdub which can scan for bad frames for avi?

[ImaWeTodd]

hmmn... no program to scan the vob files just like vdub which can scan for bad frames for avi?

Makes me kinda wonder if you are chasing the wrong problem.

I don't doubt that a vob can be "corrupted", however, following a normal process, this is very unlikely. You seem to be bent on getting this program, but don't really want to step back and provide much info.

Sorry I couldn't help.

My final words on this would be:
- A bad encode/mux could cause the problems if you see it from HD on PC
- It's most likely your dvd player does not like your brand of disc if you only see it after a burn

Cheers

[Drakng]

OK IMAWETODD..thanks for trying very hard to help. Maybe I wasn't clear
at all. Let me try all over again..

Now I got a bunch of dvd from a friend. I want to back them up. I don't want to sit infront of my TV and view the whole lot. Is there a software to check the disc for corruption? (corruption would mean the picture gets broken up..you sure you have not seen such a disc)

I have search the forum and its seem no one has ever post this question.If a solution is insight, imagine the tremendous amount of time could be saved

Hope you could give me an answer

[ImaWeTodd]

Hi Again,

I am no expert... but I can say what I have seen.

I have seen pictures break and stutter due to worn/scratched media. IF I could copy it to my HD, the copy process corrected the majority of the errors.

I had a bunch of SVCD I made on 99 min cdr that did this. Especially if I put lables on them. If I could copy them to my HD, I had no problem. I could not always copy them there. DVDDecryptor is a good way to copy even DVDr because it keeps trying even after a bad read.

If there are actaul errors in the MPeg stream, I believe DVDShrink might be a very fast way to find out. It decodes the stream and then reencodes it. It does this very quickly. And I bet it will stop and tell you there is a problem if it finds the file to be corrupted.

Hope this helps.

Too bad no one else has piped in.

[RabidDog]

what reason do you have fopr thinking the Vobs may be corrupt in the first place? As to quality who can tell..certainly not any program!!

[420]

Use the "Verify" option in many apps to compare it to your original rip. Disc Juggler and Record Now Max have this for instance. If you're actually having any probs with jerky video, it is likely either:

(a) a bad original (this is the case with Region 1 "Raising Cain")
(b) a bad encode
(c) crap media that your player doesn't like (try Ritek, Optodisc, or Verbatim as examples of good media ... assuming the dye isn't the CMC on the Ritek and Verbs)