GOP with NO picture start code/header

[jeanl]

People (mpucoder? :))
A menushrink user reported a problem with this vob file
http://s21.yousendit.com/d.aspx?id=1ON597IFC4ST717IWKI2XHNJ4B

(vts_16_0.vob). IF you look at it with vobedit, the second pack is a video pack with a mpeg sequence header, a GOP start code, an extension start code but NO picture start code. Is this legit?
If it's legit, I'm going to have to modify menushrink so it does not always expect a picture start code in the second pack of the vobu...

Thanks for any pointers...
jeanl

[mpucoder]

not legit - looks messed up. GOP may be followed by extension/user headers, and then MUST be followed by an I-picture header.

[jeanl]

mpucoder, this might be an I-picture (there are quite a few video packs), but does it HAVE to have a picture header to indicate I-pic or can this be assumed?

jeanl

[Guest]

It's a mandatory syntax element.

[jeanl]

OK guys, thanks. This means that this particular GOP is seriously flawed...
jeanl