DVD Architect NTSC video stream and Audio

Julius_911 wrote on 7/17/2003, 11:08 AM

I read thru posts ( http://www.sonicfoundry.com/forums/ShowMessage.asp?ForumID=4&MessageID=192766 ) that Video and Audio must be rendered separately, and I also have the SOFO script to do that, but I was looking if there was another way and understand if this would work.

So my question is this, if I select the template called DVD Architect NTSC video stream (from mpeg-2), then hit Custom, then go into the Audio tab and check "Include audio stream" and save the template under a different name. Would this cause problems for DVD-A? Will it render video and audio?

(I'm not sure why you need to render the video and audio seperately)

Thanks!

Comments

jetdv wrote on 7/17/2003, 11:27 AM

If you do that, no harm will come to anything. However, if you use this audio, here is what will happen:

1. The original audio will be compressed to MPEG2 format
2. The MPEG2 audio will be decompressed
3. This decompressed audio will then be compressed into AC-3 format.

When you render the audio separately, you get:
1. The original audio will be compressed into AC-3 format.

So, either way will work. The question becomes: How many times do you want the audio to be compressed/decompressed before the final result?

Julius_911 wrote on 7/17/2003, 11:45 AM

>>How many times do you want the audio to be compressed/decompressed before the final result?

I guess the audio will sound distorted if done that way? (and maybe not as crisp).

What is a AC-3 format?

Thanks once again...real glad I found this out.

jetdv wrote on 7/17/2003, 11:56 AM

AC-3 (i.e. Dolby) is the compression method used for audio on NTSC DVDs and what DVD Architect uses for compression.