Comments

SonySDB wrote on 6/17/2003, 3:31 PM
No, there isn't a way. DVD Architect will always reencode as interlaced independent of the source.
wobblyboy wrote on 6/17/2003, 5:51 PM
What application do you use to make your progressive scan DVDs? Do you have a progressive scan T.V. to view it on. I don't know much about progressive scan and would like to learn.
keith314 wrote on 6/18/2003, 12:24 PM
I just use Vegas+DVD.

I don't know if I am producing a "real" progressive scan DVD as per the actual spec, BUT when I produce a DVD with a progressive scan MPG2 from the Main-Concept CODEC, as long as DVD-Architect doesn't reencode it, then I can see the difference on my Sony progressive scan DVD player. Even on an interlaced display (i.e. a normal TV set) the file acts different.

For a DVD with interlaced mpg source, the "pause" algorithm for the DVD player seems to freeze the frame on a version of the frame with just the odd field, but doubled (i.e. the even field is replaced by the odd field) to fill the right amount of space.

But I can render the same source material into a progressive scan MPG2 file, and DVDA burns a DVD that, when paused, will show both fields frozen perfectly.

The effect is most observable when rendering several seconds of a still computer-generated image, or a composite passage where there is a prominent piece of CGI (such as the Warner Bros. shield logo at the beginning of a lot of movies). When the constant pic is there, I can pause and unpause back and forth, and on the interlaced version I will see the paused version get "chunky", but with the PS version, pause is indestinguishable from a playing continuous picture.
keith314 wrote on 6/18/2003, 12:25 PM
BTW, I talked with SonicFoundry tech support about this, and I was not believed about the phenomenon that I observed. I have to figure out a way to take pictures of my TV in such a way that people will believe me :-)