Seamless cell changes

Hi

It's been a long time since DVD SP fixed the "Seamless cell" syndrome, but even though we author our Feature dvds pretty much the same way,
once in a while DVD AE would give a message after opening a VIDEO_TS like "the discontinuity of 3 seamless cells has been changed", and I know we never do nothing of the kind (like defining a Cell as Seamless).
Should I pay it mind or not?
After one of this cases, I did a Compare from the VIDEO_TS folder against the DLT tapes, and it had errors.
I'm kind of wary here with this situation
Any pointers will be, as always, greatly appreciated.
Regards

OK, in that case there is

OK, in that case there is definitely a DVDAE problem - please try to get a copy of the VIDEO_TS folders to Larry so he can troubleshoot the problem. The address is here:

Contact Details

Actually, it was *before* the DLT

Actually, it was before any DLT writing, just saving as Tape Image to record each layer to a UDF DVD-ROM. There was no SCSI writing in this nasty episode.
I still have the VIDEO_TS folder on my hard drive, and at this moment I'm extracting to Tape Image with DVD AE again, to see if it still does the Layer 1 bigger than 0 thing.
I'll report later.

Hi Enrique,I'm sorry to

Hi Enrique,

I'm sorry to hear that, it shouldn't have happened. I'll have to let Larry comment on the technical details, but my guess is that since it was DLT-specific, it's something to do with an Apple update to the SCSI drivers. If you can send the project to Larry, I'm sure he will look into it - plus, it will make useful troubleshooting material for HDAE. Once again I'm sorry you had this problem, but glad you found a workaround.

Cheers,

Ian

Another odd one

>maybe it's a corrupt build. Did you generate the project yourself ?<

Yes. I'm on DVD SP 4.1.2, on a dual-proc G5.

>The DLT errors are surprising - did you Save after opening and getting the error about the seamless cells ?<

Yes I did, Ian.
But the thing that really miffed me happened 2 days ago: DVDAfterEdit made a Tape Image where Layer 1 was bigger than Layer 0!
Of course it didn't pass the Eclipse test at the replicator. I did a new build with DVD SP, extracted the Tape Image with DVD AE, and the same thing happened: Layer 1 bigger than 0.(I did a Get Info on both layers before sending to the replicator, which I never used to do before)
Using the same build, I let DVD SP format as Hard Drive >> DDP 2.0, and now the sizes were ok.
I'm on OS X 10.4.9, haven't upgraded to 10.4.10 or QT 7.2 yet....do you think something might have gotten iffy between DVD AE and the recent-but-not-latest OS updates?
Would be good to know.
TIA and best to you

An odd one

Hi Enrique,

Sorry not to get back to you sooner. I'm not sure of the answer - as you know, it's possible with spec-level authoring apps to set any cell to be non-seamless, however this is only required by the spec in certain instances, for example the first cell of a VTS, any cell with a cell-command set etc. DVDAE will change any cell to it's spec-defined value, which in theory is a good thing. I can imagine certain circumstances where an author might want a cell to be non-seamless ( eg. in the days before dual-layer DVD-R, simulating a layer-break on a DVD-5 ) but I can't think why DVDSP might do it.

Personally I think you are right to be suspicious of any project where this happens - maybe it's a corrupt build. Did you generate the project yourself ? If so, which version of DVDSP ? Does it happen as soon as you open the project ? Does the log tell you which cells have been changed ? If so I would take a look and figure out what they "are" in DVDSP - for example, I've seen flaky behaviour with DVDSP-generated transistions, slideshows etc.

The DLT errors are surprising - did you Save after opening and getting the error about the seamless cells ?

Ian

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