TMPGenc audio artifacts

mike10670 wrote on 10/17/2001, 11:16 PM
Has anyone ever noticed the crummy audio from tmpgenc's Super Video CD tempelate? I tried increasing it from 224 to 384, and I get the same thing; digital distortion in the high frequency range. If you listen to it long enough, you can tune it out, but it is annoying.

The source video is flawless (a direct DV capture using VF).

Comments

JumboTech wrote on 10/18/2001, 3:00 PM
Mike

I'm pretty sure that the problem is caused by the fact that your DV file's audio sample frequency is 48k and SVCD expects 44.1k. You can re-render your DV file in VF with the audio set to 44.1k (it won't take too long) and then your audio after TMPGEnc should sound alot better. Alternatively, you can use a third party piece of software like SCMPX which will resample from within TMPGEnc while it is running. TMPGEnc will first do the resample using SCMPX, then do the DV to MPEG conversion.

Hope this helps.

Al
mike10670 wrote on 10/18/2001, 7:59 PM
You are right. When I open the avi files in Sound Forge, then re-sample the audio to 44.1, then save the avi file, the convert to mpeg, the audio is clean. I think I like your idea of using VF to simply re-do the file to DV as a 44.1 as Sound Forge takes something like 5 minutes per file to save.

Thanks for the info.
JumboTech wrote on 10/19/2001, 4:32 AM
Glad the info helped. Of course re-rendering the VF file is fine as long as you have the hard drive space available. I usually delete the 48k version as soon as the 44.1k version appears. Also when re-rendering the VF file, make sure that you are modifying the DV-AVI template otherwise your files a) Take forever to render and b) Become enormous regular AVI files not DV-AVI ones.

Regards

Al
mike10670 wrote on 10/20/2001, 10:52 PM
I was mindful of that. I altered the tempelate and saved it as my SVCD - AVI prep tempelate. Deleting the 48k files is mandatory because of their size.

Again, thanks for the tip.