The More I learn...

H

Hal2

Active member
The more I get confused :(

Reading another thread in another forum I just saw a statement that DVD specs only allow 24P or 60i... and that a 30p project (29.97) should be converted to 60i prior to creating the MPEG file to put on DVD.

I use Sony Vegas9c and tmpgenc 4.0 xpress to create my MPEG file in the following workflow:

1)1080 or 720 30p (sometimes 720 60p on a 30p timeline) finished Cineform Neo Scene file render out full size to a Lanscos .avi. Settings in Vegas are for progressive not interlaced...

2)Import into tmpgenc (this is one of the things that confuse me) which always sees my file as interlaced (Vegas will see this rendered .avi file also as Interlaced) which I have been forcing back to progressive thinking that was what I was supposed to do.

3)Render out of tmpgenc as a 2 part MPEG, .m2v and .ac3 file

4)Bring into Sony DVDA which never needs to re-encode this file so I've been assuming that the render out of tmpgenc was correct - although I"m still not getting pristine quality that I would think I should.

So my question is am I doing anything wrong and if so please correct me!

Thanks in advance....
 
Incorrect, DVD supports 30p.

At the very worst, there are quite a few professional DVDs on the market that have been *flagged* interlaced (mainly due to having a few interlaced bits here and there), but contain almost 100% progressive footage. It comes down to upscale and chroma handling on the playback end really, as an interlaced stream must be handled differently than a progressive stream when upscaling.

If you're certain it's progressive, then so be it.
 
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