DVD Compliant Mono Streams

[TheLuddite]

I've searched the forums but believe I have a problem so obscure that no one as asked it before.

I have several ancient MPEG1 clips that I want to author onto an NTSC-compliant DVD. There is no problem with the video: I am resizing with Avisynth and using DGPulldown to get 29.97 fps. The problem is the audio. AVIcodec shows it as:
"Audio : 32 Kbps, 32000 Hz, 1 channels, 0x51 = Mpeg-1 audio Layer 2 [0xc0], Supported"

In other words, it is a mono, 32kHz track.

How do I convert this to an elemental stream that my authoring program (and my DVD player) will like?
I can extract the audio to a WAV format, no problem. But I am not sure on how to extract it as an MPEG audio stream, if this is necessary.

Running the resulting WAV through my usual BeLight conversion (AC3, 192K) yields an audio that is twice as long and plays at half speed. :confused:

Any help from the gurus on this one would be greatly appreciated!

[setarip_old]

Hi!

If you used TMPGEnc instead (using its NTSC "wizard"/template), you should be able to readily change the audiostream to 48,000Hz, 2 channel stereo...

[TheLuddite]

Thanks for the idea, Setarip_old, I really appreciate the response.

Don't laugh, but I am unfamiliar with TMPGEnc. I downloaded the trial version, and used the the NTSC Wizard, as you suggested, and was able to get the 48k stream that I *then* fed into BeSweet to get my AC3 to feed my usual authoring program (DVD Author / Gui for DVD Author). So I have found a way out of my problem, many thanks.

Please don't interpret the following as being ungrateful, impertinent questions, but I would like to ask:

1. When the Trial on TMPGEnc expires will I still be able to re-encode audio this way?
2. Is there some other mechanism in TMPGENc, without using the wizard, that would to invoke this 32k mono -> 48k conversion, ideally with the ability to batching multiple files, instead of one per wizard run?
3. I suspect there is some BeSweet command line that I could use in BeLight that would enable me to do this using freeware tools *and* batching, but I am somewhat syntax- and plug-in challenged with respect to BeSweet. (I.e. command lines like the following are rather incomprehensible to me:

( -input "" -output "" -logfile "" ) -azid( -n1 -s stereo -L -3db ) -ota( -hybridgain ) -ac3enc( -b 192 -intel )

4. Or perhaps there is some other audio-only transcoding tool that might allow me to do this conversion, (asI do not require the TMPGEnc video encoding engine)?

[setarip_old]

1) I suggested using the "wizard"/template because its settings make the MPEG file DVD-compliant. If you don't have that need, simply load the MPEG into TMPGEnc and click on the "Audio" tab to select the desired audio settings and then Save.

2) There is a batch list creator for TMPGEnc available at:

http://files.digital-digest.com/downloads/files/encode/TmpegBatchList.exe

[laserfan]

...I can extract the audio to a WAV format, no problem. But I am not sure on how to extract it as an MPEG audio stream, if this is necessary.

Running the resulting WAV through my usual BeLight conversion (AC3, 192K) yields an audio that is twice as long and plays at half speed. :confused:..I don't know about BeLight, but BeSweet should be able to convert your WAV to MPEG1 Layer2 audio at 48kHz which is what DVD needs. Maybe the AC3 conversion is broke somehow--but AC3@192K seems overkill anyway, doesn't it?