Comments

busterkeaton wrote on 1/24/2005, 12:44 AM
Hi,

When burning a DVD in DVD architect, you need 2 files--an audio file and a video file. If they have the same name like movie.mpeg and movie.ac3, DVD Architect will automatically link them up. They have to be in the same folder.

So when you render your mpeg from Vegas, you want to render to mpeg using one of the DVD architect presets and then render an audio file. AC3 allows good compression without sacrificing quality. So if you use AC 3, you can store more video on a DVD because the audio files will be smaller.
busterkeaton wrote on 1/24/2005, 12:51 AM
For your video stream choose

Main Concept Mpeg-2 as your format and

DVD Architect PAL video stream as your template.
There's also a widescreen template.

Then for your audio stream choose
Dolby Digital AC-3 as your format and
default as your template.

For better video quality, you can do two-pass mpeg encoding where the first pass reviews the video and the second pass encodes it. It takes longer but the output is higher.

For two-pass, Select the template like you did above and then select Custom and click on the Video tab and put a check in box for "Two-pass" near the bottom


gordyboy wrote on 1/24/2005, 4:22 AM
Unless space is an issue, why choose AC3 (compressed) over PCM (uncompressed)?

Just curious... I prefer PCM @ 48khz personally. Moore oomph about the sound. Is there a technical reason for using AC3 in preference?

Oh and I too have had issues with DVDA enforcing recompression on video and audio when I have (as far as I can see) rendered in a 'legal' Main Concept 2 DVD Architect PAL video stream format or PCM 16 bit 48khz audio stream. I don't know why it does it but it is very annoying. The project properties are set to default to PAL and PCM so I can't work out why this is.

It's inconsistent as well as it only happens with some files in some projects.

Cheers

gordyboy

fmc wrote on 1/24/2005, 5:21 AM
I also have had dvda to recompress audio.

This whole dvda routine needs Sony's attention. Very inconsistent with menu prep and burning.


Jerry Bryant
JJKizak wrote on 1/24/2005, 5:40 AM
Some DVD players will reject the disc if the audio is in PCM.

JJK
jetdv wrote on 1/24/2005, 6:55 AM
Some DVD players will reject the disc if the audio is in PCM

Why would that be when all players are required to play both PCM and AC3 (and European players must also play MPG audio meaning that MANY here do as well)?

The only reason I could think of would be that the video was rendered at too high a bitrate causing the total bitrate to be too high for the player to handle - not an incompatibility with PCM.
JJKizak wrote on 1/24/2005, 7:47 AM
Sone of the players were looking for AC-3 and if they didn't find it they would eject the disc. (older players), I remember this as being reported on some threads on this forum.

JJK