No Sound in burnt VCD!

[Emmatullah]

I downloaded a documentary from mvgroup.org called "The Mega Tsunami" and it worked fine on my PC. However, when I burnt it as a VCD using nero, the sound disappeared when I played it on the VCD player, even though it still worked fine on my PC. Any advice here?

[redwudz]

VCDs require 224 kbit/sec MPEG-1 Layer2 audio at 44100Khz sample rate. If your video is out of spec, that may be the problem. For the VCD specification look to the upper left for 'What is' VCD. <<<<<<

And welcome to our forums.

[hech54]

My old JVC player can play anything except SVCD's....anything is possible I guess. It plays them...but with no sound.

[mats.hogberg]

Nero is not the best tool for creating VCD. My player doesn't play Nero VCD at all. Use a dedicated mpeg1 encoder (TMPGEnc is highly recommended for this) to create VCD compliant mpg (if it not already is) then use VCDEasy to author and burn.
If your system isn't compatible with VCDEasy's burn engine, just create the cue/bin with VCDEasy, then burn it to disc with "anything" like burnatonce or even Nero.

/Mats

[Emmatullah]

Thank you all. However, I've tried everything and nothing seems to be working.

I've been using nero for many years and have burnt 100 of VCDs all working fine. I even burnt another documentary on the same VCD with this one, the former is working fine but this one displays the picture without any sound (just on the VCD player).

I've used TempGenc with no luck. I've tried stripping the audio from the video and and converting each separetly and the recompiling the whole movie. I thought maybe because it's XVID, so I used another software to convert it to VCD. I've even recorded the sound separetly using a sound recorder and the recompiling the movie. However, nothing seems to work. The movie just isn't giving any sound on VCD even if it is working perfectly on the computer.

[jimmalenko]

can you load the AVSEQxx.dat file that does not have sound into GSpot 2.52 and upload it here ?

[Emmatullah]

jimmalenko, it's not clear to me where exactly you'd like me to upload the file? Also, what do you want me to do with GSpot after I download it? I mean which info are you requesting?

[jimmalenko]

Errr .... here ?


http://forum.videohelp.com/viewtopic.php?t=271697 might assist.

[Cornucopia]

Some guesses as to what's going on...

2 possibilities:

1. You DL'd an AVI file with 2 streams of audio. It plays the correct stream on the PC. Encoding is somehow taking it from the other stream (which is SILENT). That's the one that gets put on the VCD. You can check this by playing the encoded-for-VCD mpeg file and see if it plays on computer.

2. Your L+R channels are identical but out-of-phase, and your player/sound system is mixing them, in effect cancelling the signals out--giving you SILENCE. Check this by using the [Audio] button on your remote. This usually cycles through L--R--L+RMono--L+RStereo when in VCD mode.

Scott

[Emmatullah]

Thank you, Cornucopia.
I tried playing with the Audio setup in my VCD player it turned out that the "reverb mode" under the "3D-processing" was turned off. The sound finally came on when I put it in the "living room" mode. In fact, it played with all the available modes. However, it sounds a little strange like that. Is there any way I can change that so it can work when the "reverb mode" is off like all my other VCDs?

[Cornucopia]

That leads me to believe it's the "Out-of-Phase" possibility.

Example tracks sine waves:

L=MMMMMMMMMMMM
R=WWWWWWWWWW

L+R=----------------------

If you invert track R, you got:

L=MMMMMMMMMMMM
R=MMMMMMMMMMMM

You could also just drop track R and replace with a copy of track L, making it dual mono.

All these things can be fairly easily done in CoolEdit/Audition, Audacity, Goldwave, etc. You would have to decode the VCD's mp2 audio to WAV 1st, and then fix, and then use TMPGEnc to reencode to mp2 (with some quality loss along the way), but that might just take care of it.

What if you didn't have any Audio FX processing AT ALL on your amp--Does it still mess up?

Scott

[Emmatullah]

Thanks Scott,
I downloaded Audacity, however I don't know how to do what you suggested. Is there a step-by-step guide somewhere? Also, I didn't understand your last question. This may seem like a stupid question, but what's AudioFS processing and where do I find that?

[Cornucopia]

I think one of my old posts showed a step-by-step guide for doing that, but if not, I'll try in a couple of days...

AFA, "AudioFX" processing:
You've got a 5.1 receiver/amp, right?
Obviously, if you give it 5.1 it should simply pass each channel along to each amplifier section and onto each speaker. If it's encoded as AC3 or DTS, it should decode 1st, then pass along.
If you give it stereo (2 ch), it can do one of a number of things:

• 1. Nothing, just pass the L -> L speaker, R -> R speaker, all else is silent
  2. Add surround ambience (an "Audio Effect" or FX)-reconstruction/synthesis from elements of the the 2 channels
  (sometimes called "Hall" or "Music", etc.)
  3. Assume it's Dolby Surround, and decode using DS/DPL/DPLII matrix, working from the 2 channels to create 4/5/6/7 channels.

That #2 may have a number of different kinds of presets: "Movie", "Stadium", "Concert", etc.

Those are the audio effect settings I was mentioning. I'm suggesting, for "critical listening comparison", you should always check it when it's set to #1 above.

Scott