A poser for all u experts

[grog]

I am trying to back up a disney DVD (hercules) so that my daughter will stop eating the originals (This gets expensive). After 4 goes I cannot get it to play after the 9th chapter - tried removing angle pointers every thing..Grab VTS sectors etc....subsequently I merged all the VOBS and demuxed them and threw the pair of files into scenarist - I received the following error on the video file -

Error: number of fields (62) in GOP (#2161) or between sequence_header_code should be equal or smaller than 30...


How do I repair this ? Is there a simple tool for repairing the Vid file?

Please help - Im tearing my hair out here....and I havent got a lot to start with after my daughter has left teeth marks in about 15 original DVDs!!!

GROG

[Arky]

I'm not absoutely sure what is causing your problem, but the most obvious thing that occurs to me, is that the maximum GOP length within the DVD spec is 15 for PAL (or 30 fields if it's interlaced material), and 18 for NTSC (or 36 fields if it's interlaced material).

SO...are you sure you aren't ripping NTSC footage from the Disney disk, and then trying to import it into a PAL Scenarist project??


Arky ;o)

[grog]

nope - its definently a pal project - ripped pal source then rempeg then remuxed into same vobs from original via IFOedit....Im lost with it I am

[Jestorius]

www.tecoltd.com has a free BitrateViewer to download. You can use it to find all information abouth your mpeg. GOP size , bitrate, etc...

[Arky]

I have just successfully replicated your Scenarist error message in 2.51, and I can tell you that this happens when the GOP lenght is too long. Yes, it's self-obvious, but we all know how spurious some messages can be from Windows programs. In this case it IS as it says. I replicated it by using the TMPGEnc cDVD template as described in this thread:

http://forum.doom9.org/showthread.php?threadid=15405&perpage=20&pagenumber=1

I found that with Scenarist, you MUST make sure you edit the TMPGEnc settings to say MAX GOP length = 15, regardless of the apparently longer GOP settings above this settings box in TMPGEnc, which would #appear# to overide the MAX GOP setting, but don't.


SO... are you re-encoding the ripped footage, or are you directly importing ripped MPEG footage from de-muxed VOBs??? It seems, from your original post, that you are doing the latter, but this is very strange because the Commercial Disney disk must surely conform the DVD MPEG requirements/spec...


Arky ;o)

[Arky]

AHHHHHHHHHHHHHH!!!!!!!!!!


I'm just reading back over the thread, and I think I may have cracked it!

I reckon you may be INTRODUCING illegal GOPs into your footage, by incorrectly merging the de-muxed MPEG2. If the "joints" between segments are being crudely stitched together, with no regard for maintaining the original GOP length, standardised throughout the rest of the (unjoined portions) of the MPEG sequences, then this would create big problems for you :sly:

Try authoring your DVD title by allowing Scenarist to deal with the unjoined segments, rather than joining them before Scenarist get a look-in.

PLEASE LET ME KNOW HOW YOU GET ON, because I am intrigued! :D


Arky ;o)

[easy2Bcheesy]

Wouldn't life be a lot, lot easier simply if you backed up the DVD onto videotape? If your DVD player is chipped you can disable Macrovision, otherwise you can get an external unit that sits between the player and the VCR. They're very cheap.

Considering your target audience here, I very much doubt your daughter will object to the loss in picture quality!

It sounds to me like this massive re-MPEGing you are doing is a lot of effort for little reward. And DVD blanks aren't exactly cheap either should they get chewed...

[grog]

Thanks for the Info - I will eneavour to try the split Vobs route over the weekend :-) (Work seems to take up so much time lately)


Cheesy - with regards to the effort - I have to put in a LOT of effort due to the fact that whilst my daughter likes to chew the DVDs My missus objects to the aesthetic bulkiness of Video tapes and I dislike the fact that I have an opportunity to have `good` quality and hate to settle for second best -

Additionally - hitting these problems enables me to extend my knowledge of the DVD-R scene....

However many thanks for the advice from all of you ......

Kind regards

Grog

[Arky]

Hi Grog, I've been away from the forum for a few days - did you succeed in the end..??


Arky ;o)

[grog]

Arky ,


I succeeded in the end but in a round about manner......

I stripped the total down as much as possible and then ONLY reMpeg the first VOB to 60% (This is OK with Disney vids as the Bitrate is HUGE in the first place) This allowed me to drop the files below the 4.7Gig limit........

As far as I can see the GOP change appeares at the begining of VOB 3 and subsequently screws up the film after this when it is remuxed. Is this a possible error with the remux facility in IFOEDIT? (I doubt it but u never know)


Many thanks for all the help tho..


:D