Mute audio track

[VRYK]

A video has two audio tracks of which one is mute (not functioning). D**S***** confirms that the track is not empty and I have checked it out in IFOEdit. What possibilities are there to fix this ?

[r0lZ]

Are you sure your player has the right codec to play it? If it's a DTS track, for example, you must use a player that supports DTS.

If you're sure it's not the problem, then go on:

Demux all tracks (including the video and subtitle tracks and the celltimes.txt file) with PgcDemux, and try to play the bad audio track in a good audio player. If it plays correctly, remux all tracks with muxman. (Don't forget to include the celltimes.txt file with its File menu, to recreate the chapter points.) Play the new DVD authored by muxman. If muxman doesn't issue an error message and you can play the new DVD and hear the audio track, then do this:

With PgcEdit, examine the type of the track (right-click the title produced by muxman, and select "Domain track attributes"). If some parameters are different in the original DVD, fix them with PgcEdit. Otherwise, try to replace the original VTST title with the new title. (Use File -> Replace VTST title.)

Good luck!

[VRYK]

Many thanks for your reply which confirms a problem with the original AC3 track. Incidentally, how can one replace an existing, or introduce a new, audio track into a video?

[r0lZ]

Demux, then remux with the new audio track. Then replace the old title with the new one with PgcEdit.

If you add a new track and you want a button in the audio selection menu to select it, it's much more complicated. There are guides on that subject.

[VRYK]

Many thanks for the info.

[VRYK]

Strange, several of my recent questions and your replies as well as my latest query have disappeared. This was my latest query:
I have joined 2 DVD5s, each consisting of a single title, into a DVD9. Is it possible to join the two titles concerned to create a single title ?

[r0lZ]

Have you read my reply when it was there?

[VRYK]

Unfortunately, no.

[r0lZ]

Damn! My reply was long!
I've explained that it's theoretically possible if the two titles have EXACTLY the same characteristics and number of video, audio and subtitle streams, in the same order. But it's very difficult and long, as you have to demux and remux (and it's difficult to keep the chapter points), and modify many commands in the DVD, and merge the chapter menus.

IMO, it is much easier to simply jump from the end of title A to the beginning of title B. You will have a little pause, and it will not be possible to jump back from Title B to A, but if you can live with that limitations, it's easy and rapid.

You should just create a new dummy VMGM PGC. In the post-commands of title A, you should simply call the new PGC in the VMGM. (If there are cell-commands, you must either edit them also, or remove them.) From the new PGC, jump to Title B. That's all.

In some cases, that might be more difficult, for example if there are many post-commands in Title 1, and some of them are necessary to keep, for example to call the correct menu at the end of the playback. But usually, it is sufficient to insert the Call at the beginning of the post-command area.

Good luck!

[VRYK]

Thanks very much for the info. Concerning jumps from the VMGM, can this be done directly to an Extras Menu or must one navigate via a “recognised” (e.g. a VTSM Root) menu ?

[r0lZ]

You cannot jump from any location to a VTSM PGC by number (except, with LinkPGCN, when you are already in the same VTSM domain). You have to jump to an "entry menu" (it's the correct term). That's a stupid limitations of the DVD-Video specs.

To "join" your 2 titles, you doesn't need to jump to the VTSM, so that limitation should not be an issue.

[VRYK]

Thanks for the confirmation.
When seeking to add a blank cell at the end of a film, PgcEdit posts the following message:
“The number of sectors in the VOB file [...] don’t match the VTS_C_ADT table [..].
Use FixVTS to remove the additional sectors from the VOB, and retry”
I believe the additional sectors to be in the PGC’s last cell and I would prefer to add these to the cell address table rather than delete them from the VOB. Is that possible?

[r0lZ]

If I remember correctly, FixVTS fixes the sector numbers in the cell table, and doesn't delete the missing sectors from the VOB, at least if they are in a referenced cell. (Only the totally unreferenced cells are dropped.) I think there is an option to fix the cell table.

Anyway, I'm not sure, so use it with caution.

[VRYK]

The PgcEdit message – i.e. that FixVTS removes the additional sectors from the VOB – seems to be correct.

I wonder whether you might be able to help with a VobBlanker problem. To replace a cell VobBlanker asks for a VOB file – but when I select the relevant VOB, VobBlanker posts “Replacing cell does not start with a Nav Pack”. Both the original and replacement PGC consist of a single cell.

[r0lZ]

A cell must start with a nav pack. The nav pack contains information about the cell (for example its VOB and Cell IDs), as well as menu button or BOV information, and a lot of other things. There are many nav packs in a VOB file, at regular intervals of approx 0.5 second.

Your VOB cell seems truncated at the wrong position, or it has been authored with a program that can output VOBs but without nav packs (and that's almost standard MPEG2 streams).

Try to export it again (with VobBlanker) from the original DVD, or if it has been authored by you, try to demux it (I don't know with what program, as PgcDemux will probably fail), and remux it with muxman.