Imported VOB won't render correctly

smhontz wrote on 1/19/2006, 7:40 PM
I copied a VOB from a DVD created from FCP. It's short - 14 MB (49 seconds). Renamed it .MPG, threw it into the Vegas timeline. (Vegas 6.0c.) I can step thru it, watch it play, and it plays correctly. However, when I render it out to AVI, at about 26 secs into, the video freezes at a certain frame and holds there until the end. The audio keeps going.

If I make a loop region just beyond the 26 sec mark (around frame 780), to the end, I can render out the loop region and it renders properly. So, I can work-around the problem by sticking the two pieces together. If I extend the loop region back to frame 778 or so, then the video is frozen during the render.

Then, sometimes it even freezes up just playing it from the timeline - that is, it starts playing the video to that point, and then the frame freezes and holds.

Any thoughts? Is there something in the compression scheme of an MPG file that can confuse Vegas enough to where it won't properly play/render it?

Comments

johnmeyer wrote on 1/19/2006, 8:51 PM
This has been reported a lot. I'm not sure whether a solution has ever been posted. Do a search in this forum using VOB as the search term and restricting the search to only look in the subject headings. You may find something.
FrigidNDEditing wrote on 1/19/2006, 9:00 PM
Bad copy of data?
Bad burn?

Those are my two best guesses.

Dave
smhontz wrote on 1/20/2006, 7:12 AM
The VOB plays fine using WinDVD or PowerDVD, and the DVD itself plays fine. It's just once it gets into the Vegas timeline, Vegas seems to get confused during the decompression process.
johnmeyer wrote on 1/20/2006, 11:22 AM
Since this has bee reported so often, I have always suspected that it has something to do with how the audio is multiplexed into the VOB. Remember that a VOB file has lots of other things embedded in it, including subtitles, navigation information and, potentially, several different audio files. Vegas is trying to pick through all of that and just show the video.

One thing you might try, therefore, is to demultiplex the video from the VOB. I think you can do this with TMPGEnc. You can certainly do it with any of the Womble products. I think there are other free tools that will do it (check over at Videohelp.com or doom9.org). Once you strip out the MPEG-2 file, I'm sure you can put that on the timeline and Vegas will be happy.

Finally, if you have Vegas 6.0c, there is now a feature to import DVD Camcorder files (found on the File menu). You could try that and see if Vegas handles the file.
Laurence wrote on 1/20/2006, 11:29 AM
There's an mpeg version of Virtualdub. You could convert it to a DV format AVI if you have a good DV codec installed.
rstein wrote on 1/20/2006, 6:33 PM
Dumb question, but did you use the IMPORT .VOB off the File Menu, or did you copy the .VOB to your hard drive and then rename it .MPG. The latter would definitely do unholy things on the Vegas timeline.

Bob.
smhontz wrote on 1/21/2006, 10:50 AM
Not a dumb question at all. I didn't find IMPORT .VOB on the file menu, but I did try the IMPORT - DVD Camcorder disk option, figuring that's what you meant. So, even though it wasn't a DVD Camcorder disk, I guess a DVD's a DVD, 'cause it imported and converted the files and they DID work properly.

Thanks for the tip!