How to fix errors in VOB files

[zakman]

I ripped Princess Bride to a single VOB using DVD Decrypter (also tried smartripper) and the VOB file contains errors in it. The support person for my editing software examined the VOB file and he said,

"that the time (length and duration) information in the VOB data packets (PCI and DSI) has errors. Specifically, the length or duration read from the VOB time data does not match the actual length of the video and audio, causing the editor to add PTS time correction which showed up
as frame count jumps in the exported video."

He suggested that I demux the VOB file and then remux it and that might solve the problem. So I demuxed the VOB file and discovered that the audio and video streams are not the same length (almost an hour off!).

Does anyone know of any software that can fix these errors?

[pyscrow]

Try demuxing with diferent demuxing software, it sounds like you only got half of the audio.

[zakman]

I've tried quite a few alternatives and they all seem to have problems. This leads me to believe I need to "fix" the vob file. Here is what I have tried:
- demux with Womble's demux tool
- demux with rejig
- demux with MPEG tools that came with TMPGEnc
- Tried running DVD Shrink on the original DVD and use about 90% compression. Then demux with Womble's demux tool

All of the above gave an audio length different from a video length (not all gave the same video length).

[Abond]

Try to use DGMPGDec the very last version - it has also demuxing capabilities

[zakman]

I just tried DGMPGDec, and it gives me the same results as Rejig (video is longer than audio). I don't think the problem is with the demuxer as much as it is with the original VOB file (has errors). Any other suggestions?

[thevoelk]

Re-rip the orginal and try again.

[zakman]

Re-rip the orginal and try again.

I have tried this 4 times now (twice with DVD Decrypter and twice with Smartripper). Same results.

[guns1inger]

Try ripping the whoel DVD as is, rather than creating one big vob. Why do you need a single oversized VOB anyway ?

[zakman]

Try ripping the whoel DVD as is, rather than creating one big vob. Why do you need a single oversized VOB anyway ?

If I use multiple VOBs, then chain these together in my editing tool (Womble MVW), I get an audio glitch at the seam between the VOBs. This isn't just me, since I have seen many people complain that they can't chain together VOB files in other editors too. This won't solve my problem anyway since the problem is in the original VOBs too. Apparently, DVD players are more forgiving of timing issues than editing software.

So, I ask my question again:
Does anyone know of any software that can fix these errors?

[zakman]

In case anyone is following this post, I am going to answer my own question. I found a program that helped many many problems. It is VideoReDo. It has a feature called QuickStream Fix and it fixes up a lot of MPEG problems in DVDs. I found that it fixed most of the problems I was having.

There was one problem that it did not seem to fix, but I found another solution to that. The problem was that many films start with a "logo" (like the roaring MGM lion) and the first frame or two has some sort of timecode problem. I don't know the technical details but when I viewed it with an MPEG timestamp viewer, the timestamp was off by exactly 1 hour. Not sure why. But the solution to this particular problem is to just cut off the first frame or two of the movie (using VideoReDo or Womble MVW). Export the movie and the problem is fixed!