Using DVDLab Pro 2 I am authoring a DVD that has multiple episodes of a show. Each episode has 2 different intros (one for English, one for Japanese). The video was ripped from a PAL disc I legally own, and the VOB file contains both intros back to back and does not use angles (the intros are not interleaved). So it goes: Opening -> eng intro -> jap intro ->episode -> Credits -> Opening -> eng intro -> jap intro -> episode... It has 2 audio tracks and 2 subtitle tracks for english/japanese respectively.
So the way I currently have it setup is using Chapter VM commands (aka cell commands) in the PRE section. For Eng intro chapter I check language (via SPRM1), if Japanese, skip to Japanese intro. For Jap intro chapter I check language, if English, skip to episode. Play back on the computer there is zero noticeable transition. However on the standalone dvd player, there is a slight pause when jumping from: eng intro -> episode, and from opening -> jap intro. Before resorting to Chapter VM (cell) commands, I tried the "chapter playlist" feature from DVDLab Pro, but I was only able to link to the beginning of it from a menu, not to a specific point in it, so that didn't work (I have chapter menus). Are Chapter VM (cell) commands like this generally supported in dvd players? It works fine on both my old sony and a slightly newer panasonic blu ray player.
Another potential solution DvdLab Pro offers is Multi-PGC title. However I am hesitant to put in the work to re-cut and encode every single chapter to individual movie clips to try this. I am not sure this would even result in a seamless playback even if I did. Or if I could still keep chapter menus etc.
I am ASSUMING the only way to transition truly seamlessly (no pause on stand alone dvd player) between opening to japanese intro or english intro to episode is to use angles. Is that right? In DvdLab Pro I quickly abandoned the idea of angles because I couldn't figure out how to only angle the intro chapters. It is wanting me to basically double the entire video, which would be detrimental to video quality. I know it's possible to angle only certain chapters (possibly not in DvdLab Pro) because I have seen it done on retail discs. Also, Dvdlab Pro's documentation claims that the sum of both video/audio/subtitle tracks actually CAN exceed the maximum bitrate for a dvd, yet everyone else says no way. Who is right?
Speaking of seamless, I read conflicting reports that says you can set the layer break (yes my dvd is double layered because of the 8G size) to be a seamless transition, while others say you can't. Is that a situation where it works for some dvd players and not others? If I set the layer break to seamless, what is the worst that will happen? Just not be seamless, or worse?
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I'm not an expert with DVDLab Pro, so I can't tell how to do it, but normally, you don't need to recode the video. The second PGC uses exactly the same content on disc than the first. The only difference are the parts skipped by the two PGCs. You can even create the second PGC with PgcEdit, and modify the VM commands manually to play it when it should be played. However, it's not a trivial job, but I can help you if you wish.
And no, multi-angle do not require doubling the entire video. Normally, it has just to double the parts where two (or more) angles must be available. But authoring properly a multi-angle DVD is not trivial.
DVDLab supports that technique. Anyway, again, if your player is recent enough, you can almost certainly set the seamless-joint flag on. IMO, the worst thing that can happen is that the pause will be present anyway, and, perhaps some very old players will freeze, but I think you can take the risk. Anyway, if you do it, burn your DVD with ImgBurn. It will do its best to burn the seamless layer break properly.
Good luck !
DVDLab Pro 2, they are VM commands attached to the top most "PRE" section before their abstraction layer runs. However when I open the compiled dvd in PGCEdit and click on the movie, they are clearly listed as cell commands.
DVDLab Pro to upload the 90 second (or so) clip as an alternate angle for a specific chapter. Either I am missing something or the software is incapable of multi-angle only in certain chapters.
Near the bottom of the page under "Bitrate for multi-angles". When I first read it could not be done, the reason seemed to make sense and I never tried to test it. But once I read on the DVDLab documentation that you COULD, I was intrigued.
imgBurn installed as it seems universally recommended for burning double layer discs while respecting the layer break (or even warning one in advance if not set and giving them the option to choose and even preview the cell where they are placing). Then I learned about the progression from DVDdecrypter to imgburn. A lot has happened on the DVD scene since I was doing anything nearly 20 years ago.
Last edited by mistateo; 29th May 2022 at 23:02.
May I know why you want to keep the two versions ? Usually, when a multi-angle (or here multi-story) DVD is ripped, the user wants to keep only the angle in his own language. Is it really important for you to be able to see the logo in Japanese ?
A "program" is a similar segment, and has to be a cell or several cells in consecutive order. A "chapter" must correspond to a specific program. (It is not clear why the author of the DVD specs created the programs and chapters, as basically, they are the same thing.)
So, to summarize, although most of the time, a chapter is made of a program, itself made of a single cell, there are cases where the movie contains much more cells than programs and chapters. It's especially the case of the DVDs protected with ARccOS or similar protection, where many cells are present just to confuse the rippers and establish the protection. Anyway, a chapter must always begin at the beginning of a cell and end at the end of the same cell or of another cell.
However, I disagree on many things reported on that page, and especially when they claim that "Today you will hardly find any mainstream title that uses this feature." and the reasons they give. They ignore completely the large number of movies with the movie title, end credits or printed information authored as multi-angle cells. Disney's Snow White (European version at least) is a good example : the names of the dwarfs engraved on the headboards are different depending on the language chosen.
IMO, ImgBurn is a regression from DVDdecrypter. It is probably a better burner, but it has lost its ability to decrypt the DVD. Pity. But luckily there are alternatives.