No audio after authoring (PGCEdit, Muxman or other ?)

[COMANDO]

Please, I'm experiencing some difficult problems when trying to author a dvd. I would like to add ( or replace ) a subtitle into my DVD. There are some subtitles there which I don't mind taking out, if it is easier than adding, mainly because I have some difficulties to edit IFOs. I asked for some help here, in VIDEOHELP forum
http://forum.videohelp.com/topic275603-240.html#1837513
MANONO was very friendly trying to help me, but unfortunately he doesn't know what is happening to my authored DVDs. My case is explained on this page 9 of the topic. Just to summarize, when I author a DVD, just following this guide ( page 1 of the same topic), my authored DVD becomes with no audio. I make the demuxed folder, the remuxed DVD with Muxman ( untill here there is sound), but when I replace the files ( almost the end of the guide ), the sound from the movie disappears. There is sound just on the menu. Just for a better explanation, please, if somebody could have a reading at this page 9, it will be really better to understand. I have here a lot of gigabytes here just stucked, and I can't delete, because I haven't even finished the first movie.Please, if somebody could help me, I will be really grateful. Thanks in advance.

[Sir Didymus]

Well, the method you are using in your reauthoring procedure is intrinsically weak...

I mean, most probably, in your process, the number (and the sequence) of the audio strams are different between the original DVD and the one you have authored with MuxMan...

If this is the case an easy solution exist to quicly fix the issues you are facing...

By the way just yesterday MpuCoder released the new free version of MuxMan (it is now the 0.16.6)... Good idea to stay aligned with the last releases of such fundamental DVD tools...

But back to the point; let's say [for instance] you have 3 streams in your original DVD: English, French ans Spanish. You should be able to check the number and the sequence of the streams in the output folder of PgcDemux.

If you want to keep only the French audio, it is a good idea to generate additional "dymmy" audio tracks (for all of the audios in the original DVD; in the example for the English and Spanish). These dummies should take just few kilobyte of space. You can use the nice tool "Silence" made by Jsoto, to create these two tracks, (it is sufficient their length is 1 second).

Then follow again the process of reauthoring, feeding to MuxMan the same exact number and sequence of the audio streams, as these are in the original DVD.

If you don't follow this method, you have always to adapt the VM machine code (the one controlling which one of the audio tracks should be played in the DVD), by using PgcEdit, I would say...

On the other hand, if you create (and author with MuxMAn) also the audio dummies, you will most probably need to do no adaptation at all to your reauthored DVD, after using VobBlanker...

That's my suggestion...

Cheers,
SD

[COMANDO]

Really thanks for your help Sir Didymus. I found out an option on PGCEdit which enabled the audio. Unfortunately, I have now another problem which is making me a little crazy. I authored a DVD, which I replaced some subtitles in. The DVD played very well on my computer. The subtitles were shown correctly. However, when I try to play on my standalone dvd player from the sitting room, the DVD plays well, the subtitles are shown correctly, BUT the sound is really really low. Much Much lower than when playing on computer. I have to increase the volume radically just to listen something ( just some sounds, not a good sound ). Do you or does anybody know what may be happening with my authored dvds ? How could I solve this problem ?
Thanks a lot Sir Didymus and everybody in advance

[blutach]

Did you do anything to the audiostream before authoring the DVD? If not, have you checked on other standalone players? It might be a hardware issue.

Regards

[COMANDO]

No, I didn't do anything, I just demuxed the audio ( which is AC3 audio ), and later joined with Muxman. No modification on audio. I will try to test it in somewhere different in this afternoon. Do you think it might be because the DVD is in PAL format, and here the standart format is NTSC ? However I tried to modify the selection from my TV to the 3 positions there : NTSC, PAL and AUTO.
Thanks :)

[blutach]

Very possible! You would need to convert the video and audio to NTSC or get a multi-format player.

Regards

[COMANDO]

I went to a friend's house and tested there. He has a home theater system there, which is 5.1. The DVD played very fine there, the sound played very well and loud. Now I ask : does the sound play not very well here because my TV is just stereo sound (I just have the dvd player connected to the TV, and the sound plays just from there ) ? Wouldn't it have to play at least a normal sound, and just the difference would be the stereo sound instead of 5.1 sound ? Because the difference is happening mainly in the volume instead of the emulation. The movie has just 5.1 sound, unfortunately, otherwise I would select another sound. What makes me more curious is that, if I'm not wrong, I have already played movies whose sound was more than a stereo sound, like 2.1 or 5.1, and it played well, just for the difference that it became stereo sound, and not a sound with a highly-decreased volume.
If you or anybody have something to tell me to to, it will be welcome.
Thanks in advance :)

[r0lZ]

Might be the problem. The players have usually either a stereo mode or a setup to mix the central channel (with the voices) to the front left and right channels (effect channels), so that the 5.1 streams can be played on a stereo equipment. It's often called Phantom Center Channel Mode or something similar. Maybe you haven't made the correct setup on your player.

[setarip_old]

@COMANDO

Hi!does the sound play not very well here because my TV is just stereo soundActually, in the past, I've found just the opposite to be true - the output of the downmixed (To stereo) 5.1 .AC3 audio from the TV's stereo speakers was always LOUDER than 5.1.AC3 output at the same volume level...

BTW - Are you sure the audiostream isn't actually DTS?

[COMANDO]

Thanks everybody for the help. I don't know what's happened here, but suddenly the it worked on dvd player. I'm sure it didn't work in the first time, but now, when I play the disc, the sound works ( as stereo, that's ok ). Thanks everybody for trying to help me =)

[setarip_old]

Sounds like you've resecured a previously loose audio cable...

[COMANDO]

No, I wish it had been just that. At that day I just put the disc into the player, and the sound played in a very low volume. Later, when I tried to play the same disc again, weirdly the sound played normally. But what matters is that now it's working =)