Re: [Dvdauthor-users] Some questions on the dvdauthor xml

[<jaa...@co...>]

Wolfgang Wershofen wrote:
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> José Alburquerque schrieb:
>   
>> Hi fellow dvdauthor users.  I hope everyone is fine.  I'm thinking
>> of developing a respectable gtk front-end to dvdauthor (actually I'm
>> thinking of using gtkmm).  I've been perusing all the docs on dvdauthor
>> I can find (on the net, on the dvdauthor site and in the mailing list)
>> and I think I understand most of it, but I do have some questions I was
>> hoping some of you on this list might be able to answer.
>>
>> 1) What is the difference between having VOB's in one PGC as opposed to
>> separate PGC's?
>>
>>     
> If you put several vobs into one pgc they are sort of concatenated
> together. A <pgc> marks a separate title that you can jump to from a
> menu and all vobs within it are played in succession.
> If you put each vob into it's own pgc, you form separate titles. Each
> one can be jumped to from a menu and after playing the title, you may
> return the the menu or jump anywhere else.
> So it's up to what you want to acheive with your pgc layout.
> The third entity concerning organization within a DVD is the titleset.
> You don't need to specify separate titlesets on a DVD as long as all
> your vobs have the same characteristics (video and audio format), but
> as soon as you are dealing with different contents (eg. a 16:9 movie
> and a 4:3 home-video) you _must_ put them into different titlesets.
>
>   
>> 2) can a Menu PGC have more than one VOB? (more than one video?)
>>     
> AFAIK yes.
>   
>> 3) Is there a limit to how many VOB's are in a PGC?
>>     
> I think the limitation is not by vob but by cell. AFAIR the maximum
> number of cells in a pgc is 256 (someone correct me if I'm wrong).
> Each vob consists of at least one cell so the maximum vob count may
> also not exceed 256, but the limit can be much lower, depending on how
> many cells (or chapters) you define per vob.
>   
>> 4) How are the <video> and <audio> tags of <titles> and <menus> related
>> to the VOB's in the PGC's? As I understand it, there is a limit of one
>> <video> tag and eight <audio> tags for each <menus> and <titles> group.
>> Does this limit the VOB's in the PGC's?
>>     
> As I already wrote in point 1, all vobs in one titleset (that is
> within one <titles></titles> or <menus></menus> bracket) must have the
> same video and audio formats. This is why only one <video>-tag is
> allowed/needed to describe the characteristics for all vobs in that
> titleset. And you need up to eight <audio>-tags as a vob may contained
> this maximum number of audio tracks with different languages and/or
> formats.
> This does not limit the number of vobs in the pgc, but it limits the
> combination of vob files of different formats.
>   
>> finally:
>>
>> 5) I understand what the "chapter" parameter of the <cell> tag does
>> (I've looked on the list), but what is the "program" parameter for?  Is
>> that so that the cell can be distinguished as a menu to jump to?
>>     
> I found this post from Scott (the author of dvdauthor) in the list
> archives:
> http://sourceforge.net/mailarchive/message.php?msg_id=9fd0f9250604191735r68cfc5e1n85794721f29f5ab0%40mail.gmail.com
> Obviously, it's not that clear, what the advantage of a program in
> favour of a cell is...
>   
>> Would any of you be kind enough to answer as much as you can?  I'd
>> appreciate it so much.  Thanks.
>>     
> De nada. ;-)
>
> saludos
> Wolfgang
>
> - --
> Geek by nature, Linux by choice
>
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>   

This is really helpful information!  BTW, "Saludos" to you too (how do 
you know Spanish? ;-)).

-Jose