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Old 15 Jan 2004, 08:23 AM   #1
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Default AVI to MPEG to DVDLAB - No Audio

Hi all, new member here.

Here is my problem, hope someone can assist me with it.

I have several episodes of a particular series, all are in Divx3 or Xvid format AVI, and all appear to use AC3 audio

I have done the following to put these onto dvd.

Using TMPCENG I convert these avi files into SVCD MPEG files, setting the bitrate to 2500 giving me a file size of approx 850mb.

I then take the Mpeg file, and using DVDLAB I import the file into it. DVDLAB then demuxes the video and audio for me (takes 10 mins) and offers to transcode the audio into a more suitable format for DVD, in this case I leave it as standard (Optimal) but have tried PCM and others.

The audio transcodes, I build several episodes into the same dvd, add a menu, create the relevant connections, compile and burn my DVD.

Playback in my home DVD player, and I get a perfect menu, video is great, and good quality, but no sound, nada, not an incling.

I am completely lost now. Nothing I do works.

I have tried extracting the audio in Virtual Dub to Wav, and selecting this as the audio source in TMP but still no go.

Anyone got any ideas on this, is there something that works as well as TMP that I can use instead to test things out more.

Thanks in advance for any help I get.
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Old 15 Jan 2004, 10:38 AM   #2
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Fixing .AC3 Audiostreams for use in TMPGEnc

1) Extract the audiostream from the .AVI as follows:

VirtualDubMOD (different than standard VirtualDub) >>Streams>>Stream List>>Demux Save with a new filename (.AC3 extender)

2) Use a hex editor to locate the FIRST instance of "0B 77" - and delete/cut all data prior to it (As an alternative, you might try using a program named "AC3Fix")

3) Load .AVI file FIRST into TMPGEnc

4) Load modified .AC3 file SECOND into TMPGEnc

5) If converted MPEG file is out of synch (most probable, since a piece of the .AC3 was "trimmed" off the front-end of the file), use TMPGEnc as follows to correct:

Load MPEG into TMPGEnc's main window
Click on "Setting" radiobutton
Select "Advanced" tab
Put a checkmark next to and then doubleclick on "Source range"
Enter appropriate number (positive or negative ["-"] next to "Audio Gap Correct"
Click on "ok" and click on next "ok" to get back to main window
Save with a new filename

(Or, if you prefer to adjust the .AC3 audiostream directly, download AC3DelayCorrect from http://farmi007.bei.t-online.de - and additionally download (and place in same folder) GfaWin23.ocx)

Last edited by setarip; 15 Jan 2004 at 10:42 AM
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