Is it interlace or progressive?

Jerry K wrote on 9/15/2012, 9:10 PM
Is it interlace or progressive?

The question is when rendering out nested video from Vegas timeline and all your footage render setting are interlace will the rendered clip be interlace or progressive? I believe it to be progressive video.

First my workflow.

Editing with Vegas Pro 10e, all clips are 1080 60i avchd, rendering out to sd mainconcept mpeg2 interpolated.
The rendered mpeg2 is definitely interlaced. Now I save the project on the timeline open a new project drag the .veg file on to the new timeline nesting the previous project. I then render the nested project using all of the same settings but this time the rendered mpeg2 video looks and checks out to be progressive in my testing even though Media Info clams it to be interlace.

In a nutshell what I'm saying is when nesting video on the timeline and rendering it out even though all my settings are interlace I will wind up with a progressives video in a interlace container. Has any one on this forum come across this? Am I missing something here? Could I be mistaken?

By the way down converting 1080 60i avchd to sd mpeg2 progressive for DVD playback looks much sharper plus 90% of all artifact are gone. The only down side I see so far is 30p is not smooth when panning.

I know interlace has more resolution and I will be giving up some by using progressive but all I could say down converting hd to sd interlace looks soft and has annoying artifacts. Down converting to progressive looks much sharper, clearer and 90% of all artifacts are gone. The 30p progressive DVDs play fine on all my TVs and dvd players.

I would like to hear your feedback on this and how many of you are burning 30p DVDs for delivery?

Jerry K

Comments

Former user wrote on 9/15/2012, 9:23 PM
On the project that your nested veg file is in, the properties for that project are set to INTERLACE as well?

It should keep interlace all of the way. Although you say you are using the same settings, I assume you have set the properties of the 2nd instance of Vegas to Standard Def, Interlace with the same field order as you have the render settings for the first instance. And that you are rendering to the same settings.

Dave T2
Jerry K wrote on 9/17/2012, 6:21 AM
Hi DaveT2, yes project settings on the 2nd instance are the same, UFF and interpolate. Render settings main concept mpeg2 LFF. I forgot to Mention that besides losing a field the render time is cut down about 30% or more which is typical of a 30p render compared to a 60i render that takes much longer.

Jerry K
Former user wrote on 9/17/2012, 7:40 AM
So in your second instance, your project properties are UFF, but you are rendering LFF. Are your project properties set for Standard Definition or High Defiinition?

Dave T2
Jerry K wrote on 9/17/2012, 7:57 AM
Sd for DVD.

Jerry K
Former user wrote on 9/17/2012, 8:10 AM
May not be relevent, but your properties should match your output as far as field order. This may be causing Vegas to do something funny and appear to be progressive, just guessing here though. Vegas is having to reverse the field order.

If you don't mind me asking, what is your workflow that is making you bring in a nested project?

Dave T2
Jerry K wrote on 9/17/2012, 12:58 PM
Dave when editing with many layers it's much easier to build projects in 8 or 9 segments, save each one as a .veg file then nest each segment.

The field order is Sony's default and I believe it to be correct.
avchd property window setting UFF.  Render window setting mpeg2 sd LFF.
If this is not correct please let me know.

Jerry K
Former user wrote on 9/17/2012, 1:15 PM
Okay, so you are bringing various projects in as nested with the properties of the nested project matching the properties of the original, in this case High Def with UFF, then you are rendering to Standard Def LFF for the MPEG. Then you have stumbled on some quirk in the system. It should be creating an interlaced sd mpeg.

That is an odd one.

Sorry, I guess I can't add much more to the information. I would normally just render each segment out to a lossless or uncompressed format and bring them to a new project. I don't like the way Vegas nest's projects. I prefer the way that After Effects allows multiple sequences.

Dave T2
Jerry K wrote on 9/17/2012, 4:26 PM
Thanks for your help Dave, I got an email from John Meyer's that might help my problem. I will be doing some more testing when I have time.

You said that you don't like the way Vegas nest's projects. Can you tell me what it is you do not like?

Jerry K
Grazie wrote on 9/27/2012, 11:49 PM
Jerry K, I have posted further to this.

Maybe "another" would care to check this against VP11 700/701 and even VP12!

I get this in VP11 B683, could have been rectified in VP11 700/701 and now VP12.

Cheers

Grazie