Big audio delay (IfoEdit)

[stripy]

I have a DVD that has large volume boosts when songs start while dialogs are barely audible. So I decided to demux, correct AC3 audio and multiplex it back. I demuxed using VobEdit. When I wanted to remux in IfoEdit I first checked audio delay. VobEdit gave me nothing for audio delay. So I checked with DVDDecrypter and delay was 8880ms (Movie starts with some award screen with no sound). IfoEdit didn't accept this value (it accepts values between -5000 and 5000ms). I think VobEdit also has some limitations because it didn't tell me the delay.

My question is why is this limitation in both programs. And what program is there that can handle multiplexing with big audio delays with ease (DVD Maestro can, but it's complicated).
When I patched IfoEdit to accept this big value it worked just fine, so functionally there doesn't seem to be a problem.

[blutach]

Tried Muxman?

Regards

[mpucoder]

Muxman limits the delay to 300ms for technical reasons. For a delay this large I'd suggest making a file of silence using jsoto's tool at http://www.videohelp.com/~jsoto/audiotools.htm
Then use Muxman to mux both files in the correct order.

[jsoto]

Yep, delaycut will be able to add a loooong silence at the start.

I've also found this weird in some (rare) DVDs, The "native" (english) track was OK (zero or a small delay, don't remember well), but the spanish one has a big positive delay. This is an ugly way to author when they have not sound for the intro/logo which is joined to the main movie.

jsoto

[dejanc99]

I'm having a similar problem in a attempt to insert subs in Usual suspects. There's a useful option
in Lab Pro (tools/audio delay) that can fix this,
but I don't know how to determine of how big the audio delay is (it should be around 8.5 seconds).
Can you briefly explain to me how it should be done in Dvd decrypter (or some other program).
VobEdit didn't help.

[jsoto]

Use pgcDemux and hit Check A/V button. If the delay is too loooooong, may be it fails. Let me know in this case.

jsoto

[dejanc99]

Now, I changed my mind about ''briefly explanation''.
I just can't find that Check A/V button in Dvd decrypter.
What should I do (in steps) after inserting disk in drive.
Thanks.

[jsoto]

I was talking about pgcDemux, not dvddecrypter.
pgcDemux needs an unencrypted input. Drag & drop the IFO in the main dialog, select your PGC and hit the button.

jsoto

[dejanc99]

Nope, pgcDemux didn't help either.
I was wrong anyway. Audio was running in advance (for some 8.6 sec.).
But I managed to fixed it in Lab Pro (after remuxing the movie a few hundred times).
pgcDemux is OK, but I'll countinue using VobEdit (unless you convince me that pgcDemux is a better tool for dvd editing).
Thanks again.
Dejan

[jsoto]

VobEdit is a great and unvaluable tool, but it does not open the IFOs, so it does not know how the cells are chained. This can be an issue in some cases if you do not know what are you exactly doing.
But the most common issue is the one related with subs: many times, one PGC is composed by more than one VobIDs. In this case, Vobedit subs extraction will not be useful to mux them again, because the PTSs are reset at VID change
Note these issues cannot be qualified as bugs, because they aren't. It is just how VobEdit works. (It does not use the IFOs).
jsoto