Render As – question

[John Rofrano]

[Rick Hughes] “Why is DVD Architect wanting to re-compress audio … and more to point how can I stop it.”

I haven’t had a chance to look into this but I remember reading something about the Studio AC3 encoder in Movie Studio not being DVD compliant so you need to render to a WAV file and let DVD Architect Studio convert it to AC3 but as I said, I haven’t had a chance to look into this further and this may have changed with more recent releases. This is why I said render to WAV. DVD Architect will either use the WAV if there is enough room on the disc, you convert it to MPEG2 or AC3 audio as needed.

~jr

http://www.johnrofrano.com
http://www.vasst.com

[Rick Hughes]

My worry is wav is not DVD compliant format.
It would risk a drop in quality to have to transcode from mpg file (with mpeg audio) to wav and then wav to AC3

To simply put a less than 4.7Gb file onto a 4.7Gb media would seem a fundamental use of DVD Architect, or am I missing something expecting it to work this simple ?

[John Rofrano]

[Rick Hughes] “My worry is wav is not DVD compliant format.”

Sure it is. The DVD Spec supports uncompressed PCM audio and WAV files contain uncompressed PCM audio.

[Rick Hughes] “It would risk a drop in quality to have to transcode from mpg file (with mpeg audio) to wav and then wav to AC3”

Actually WAV files are uncompressed so there is no loss in quality going from MP2 to WAV. So MP2->WAV->AC3 is the same quality as going from MP2->AC3. That’s why I suggested it.

~jr

http://www.johnrofrano.com
http://www.vasst.com

[Rick Hughes]

If DVD Architect already wanting to recompress presumably due to size, changing to wav would make an even bigger project file size ? …. wouldn’t it make it worse.

Is there somewhere I can go specifically for DVD architect support ……. something not right in way its working.

[John Rofrano]

[Rick Hughes] “If DVD Architect already wanting to recompress presumably due to size, chaining to wav would make an even bigger project file size ? …. wouldn’t it make it worse.”

No, because DVD Architect will use the WAV if it fits, and convert it to AC3 if it doesn’t. In your case it will convert the WAV to AC3 and you will have the original audio rendered as an AC3 file in the end just as you originally intended. I still need to check if DVD Architect Studio supports AC3 or just WAV and MP2.

What version of DVD Architect Studio are you using? (maybe I can download the trial and see what’s going on)

~jr

http://www.johnrofrano.com
http://www.vasst.com

[Rick Hughes]

Using DVD Architect 5.0

I have the completed Movie Studio project which is a single mpg file with embedded audio, want to create DVD MPEG standard DVD to give maximum compatibility in players.

I followed the advice to use the Make DVD wizard …. even DVD architect thinks it will fit on DVD … see attached .. bottom right corner shows only 4.5Gb

This is simple DVD – no menus

[Rick Hughes]

Think I have found the answer … or at least a step towards it …

Created DVD Architect single video file, when I proceed to next window that is where i get the warning that it will recompress audio …
At that point if I click on ‘Optimize‘ I get following view for Audio:

The Vegas render produces a combined video & audio file in single mpg file, when I look at the mpg file using Mediainfo I can see that Audio is 224Kbps 48 KHz mpeg
The ‘optimize’ step above seems to be dropping this to 192Kbps to make it DVD compliant.

Does this make sense ?

[John Rofrano]

Yes it makes sense. It’s also converting the MPEG audio to AC3. It all needs to be DVD compliant.

~jr

http://www.johnrofrano.com
http://www.vasst.com

[Rick Hughes]

Thanks

(Lots of Q’s at moment – doing a lot more than my usual short clips for Youtube)

[John Rofrano]

[John Rofrano] “Yea, I forgot the AC-3 encoder that comes with Studio isn’t any good for DVD’s. You should encode the video as WAV to get the best audio with the Studio version.”

I went back and tested this and my statement was wrong. I rendered audio with Movie Studio 12.0 using the Dolby Digital AC-3 Studio and I dropped the file into DVD Architect and it did not want to recompress the stream. So the AC-3 encoder that comes with Movie Studio seems to be fine for making DVD’s.

~jr

http://www.johnrofrano.com
http://www.vasst.com