DGIndex Error MSG "Opening GOP is not closed!" Why?

[StainlessSteel]

Hello,

I wonder why I get the following message "WARNING! Opening GOP is not closed! The first few frames may not be decoded correctly." in DGIndex when opening my ripped VOB file? I used DVD Decrypter 3.2.2.0 to rip the DVD. Can anyone give me some hint?

Thanks,

StainlessSteel

[killingspree]

http://forum.doom9.org/showthread.php?s=&threadid=76656&perpage=20&highlight=dgindex%20Opening%20GOP%20is%20not%20closed&pagenumber=13
and following page might help

steVe
PS: the search button indeed is your friend ;)

[StainlessSteel]

Thanks for the hint. Unfortunately it didn't help because the past topic's GOP problem seems to be linked to an extraordinary file name. Mine is quite simple and I still get that error.

[Guest]

You are getting the warning (it's not an error) because the opening GOP is not closed. :)

Maybe that isn't a starting VOB, or you cut the VOB, or maybe it is a mastering error. In any case, it is really harmless because DGDecode will replace those frames with good ones and it's not really worth worrying about 2 frames at the start of a movie.

Technically, the first GOP of your VOB is starting with B frames that cannot be decoded. Sometimes when a GOP starts with B frames, they use backward prediction only and set a flag (closed_gop) indicating that. Your VOB starts with B frames but has no closed_gop flag, so those B frames are formally undecodable. That is why the warning is given.

[StainlessSteel]

Thanks a lot for the info. It's only one VOB and even the first on the DVD. So I guess it's a mastering error. Well, at least it's not a failure during the ripping process.