difference between Multi PGC, Multi Angles and seamless branching

[Master Yoda]

Were'nt sure where to put this..

Could some explain whats the difference between Multi PGC,Multi Angles and seamless branching.

As i have a episode disc with 6 PGC, this is multi PGC right ?
But i also have dvds like T2 that have 3 PGC .. this is seamless branching right ??

If so whats the diffence there as they both have more than one PGC.

edit: changed title and moved to appropriate forum

[influenza]

multi pgc: more then one pgc is used in a vts set
seamless branching: one or more pieces of the same video are used in different pgcs (so the same video is reused, which saves space. You can recognise this by the vobids that are used in the different pgcs. If for example vobid is three minutes long and used in both pgc1 and 2 it's seamless branching. A vobid of 1 second used in multiple pgcs is not exactly seamless braching though.
multi angle: the video has multiple angles which you can view. For example a popconcert which you can see through multiple cameras by switching angles.

any combination of the above three is possible to ofcourse.

[Master Yoda]

Thanks for the info mate.

[Badbonez]

Can you tell me what Seamless Branching is used for?

It sounds like you can choose a particular segment of the video to watch. I.e., watching the 'extended' version as opposed to watching the original release version. But I'm not sure how that would look in Scenarist.

If Title_1 has the original release version, then would another title have the 'extended' version? Essentially using the same assets from Title_1 but inclduing the extended bits?

Thanks in advance for the clarification.

[Badbonez]

OK, I found this link as I was searching for information on GOPs.

http://www.dvdangle.com/dvd_tech/explanation/seamless_branching.html

Told me a lot about seamless branching and that yes, it essentially allows the user to select to watch certain chapters or not. I thought it would be more complicated than that.

[dvd_maniac]

I believe an example of this could be an epsiode disc. Say the dvd has five episodes on it. The opening credits are the same for all five, so you could have the opening credits seamlessly branched to play as the opening credits for all 5 pgc's.
Say star trek starts off with PGC #1, then goes to the opening credits (which are branched to open) then continue on with the rest of the episode (PGC #1) and does the same for all five. This way, you could save space by only using the opening credits once on the dvd

[Badbonez]

Originally posted by dvd_maniac
Say star trek starts off with PGC #1, then goes to the opening credits (which are branched to open) then continue on with the rest of the episode (PGC #1) What do you mean by "branched to open?"

Thanks.

[dvd_maniac]

what I meant was that when it was time for the opening credits, it would use the opening credit video. It would use that SAME video for all the episodes on the disc. Say the opening credits video is 80MBs. If they encode all the episodes with opening credits, the total video used for opening credits would be # of episodes X 80MBs. If you use seamless branching to point to the opening credits for all episodes, then the total would only be 80MB. There are other reasons for seamless branching, this is just one of them.

[Badbonez]

Would these opening credits be within the same Title as the episodes? Or at least within the same VTS? Or maybe it has to be within the same PGC? I guess I'd like to know the structure of a seamless branching Scenarist scenario.

And again, thanks for your time.

[dvd_maniac]

I am sorry, I do not know the actual structure or how to accomplish creating a seamless branch authored movie myself but I found this right here on Doom9 Scenarist: Creating Seamless Branching (http://big5.doom9.org/index.html?/mpg/Seamless_Branching.htm)

I will try this myself, as I capture wuite a bit of tv shows for dvd-r and hate to waste space on credits and such.

[Badbonez]

Thanks for the link. But that's totally over my head at this point and I think my version of scenarist (2.6) will do seamless branching. But I'm not sure. Hopefully someone could illustrate this procedure with a Scenarist scenario example.

Thanks again!

[dvd_maniac]

Actually, I am just too lazy. I only use Scenarist with dvd2svcd myself. I have never tried to master it. I use Maestro more. Maybe when I get more time. I would like to learn this feature.

[influenza]

Seamless branching just means that different video pieces are used multiple times (in different PGCS within the same vob set).

It's very easy to create. Just drag the same track to multiple pgcs and you have a seamlessly branched title.

It's just something to save space.

Instead of creating 5 tracks with the same video info you'll use one track 5 times.

[dvd_maniac]

I will try it in Maestro then. Didn't know it was that easy.
Thanxxx

[Badbonez]

Hi Influenza, do these files have to be in the same VOB set to be seamless? That meanst they have to be in the same VTS, right? But they could be in different titles within that VTS?

Thanks again.

[influenza]

yes within the same vobset, but the can be in different titles/pgcs