.mpg has sound, but the created DVD has not. What's the matter?

[teko77]

I have used Videostudio 7 in creating a DVD out of a .mpg-file. For some reason the resulted DVD does not have any sound. I haven't had such problems before. The only thing that differs from my earlier captures is that the audio is 384 kbit/s instead the regular 224 (the sound is mpeg audio).

What's the matter here and how to correct the problem?
Thanks for any info!





Teko77

[DIggedy]

The problem is the format not the bitrate. My Toshiba standalone refuses to play mp2 audio from dvd for some reason too. Convert the audio to ac3 and it is guaranteed to work.

[coona]

Only PAL players are able to play mpa audio. NTSC players can´t do this.

[teko77]

I am authoring a PAL-DVD. I have never had any probs with MPEG-audio otherwise. Must be something else.



Poku

[echooff]

I use mpa all the time on my ntsc player.

[coona]

You are lucky then ;).

This is from DVD Demystified.

MPEG audio is multi-channel digital audio, using lossy compression from original PCM format with sample rate of 48 kHz at 16 or 20 bits. Both MPEG-1 and MPEG-2 formats are supported. The variable bit rate is 32 kbps to 912 kbps, with 384 being the normal average rate. MPEG-1 is limited to 384 kbps. Channel combinations are (front/surround): 1/0, 2/0, 2/1, 2/2, 3/0, 3/1, 3/2, and 5/2. The LFE channel is optional with all combinations. The 7.1 channel format adds left-center and right-center channels, but is rare for home use. MPEG-2 surround channels are in an extension stream matrixed onto the MPEG-1 stereo channels, which makes MPEG-2 audio backwards compatible with MPEG-1 hardware (an MPEG-1 system will only see the two stereo channels.) MPEG Layer 3 (MP3) and MPEG-2 AAC (also known as NBC or unmatrix) are not supported by the DVD-Video standard. MPEG audio is not used much on DVDs, although some inexpensive DVD recording software programs use MPEG audio, even on NTSC discs, which goes against the DVD standard and is not supported by all NTSC players.

Tekko77 did you solve the problem? Did you try to convert your audio into ac3??

[teko77]

Well, I had luck with TMPG DVD Author. It preserves the mpa-sound, but it's not that well in sync as it would be with VideoStudio. This is an important movie that I have captured (for me) and I want the sync to be dead-on. So I continue looking.





Teko77

[oddyseus]

Skip dvd author.

Best things come when u r dealing with them pesonally.

Demux with tmpeg and author in Maestro or Scenarist, if u have access to anyone of them.

NTSC standalones don't suppose to support mpa audio. This means that some models just can't playback them whereas some do.

use dvd2avi to save the audio in wav format and transform it to ac3.

This is the key to deadon sychronisation.

[DIggedy]

The toshiba I mentioned (an SD-1300) is both PAL & NTSC and still refused to play the title with sound. Go with AC3 ot PCM to ensure maximum compatibility across all players.