VV 4.0c: Problem producing a Progresive .AVI

gbohn wrote on 6/2/2003, 10:46 AM
Hi;

I'm trying to determine if I'm doing something wrong, or have found a bug. I'm trying to produce a 'progressive' uncompressed AVI file (to feed to another program).

The problem is, even though I think I've configured a progressive render, it always comes out interlaced (at least according to the VV info when I highlight it).

I set the prject to 720x480, Field: none (progressive), Aspect: 0.9091 (NTSC DV), Frame 29.970 (NTSC).

I then selected render as, type: 'Video for Windows (AVI), Template: Default template (Uncompressed). Under custom I chose 'best', and Field: None (progressive), Frame size: NTSC DV (720x480), Frame rate: 29.970 NTSC, Pixel 0.909, video format uncompressed.

Under the render settings, I tried Frame size of NTSC DV, Custome Frame size, and 'Use project' with the same results. The output is always interlaced.

Is there something different I should be doing to create a progessive uncompressed .AVI or is this a bug? If I choose a Template of "NTSC DV', then I can get a progressive output, but I don't want DV compression in this case.

Thanks;

-Greg Bohn

Comments

SonyEPM wrote on 6/2/2003, 11:23 AM
What apps (besides Vegas*) are interpretting the files as interlaced? AE sees it as progressive, which is correct.

*Vegas makes a guess about the field order based on a a list of canned profiles- it does not "sniff" the field order by looking at the fileds themselves. If you know the file is progressive, you can save the profile of that file in media properties, and the next time Vegas sees a file like that, it'll interpret the field order using the updated profile info.
gbohn wrote on 6/2/2003, 1:09 PM
What I've been doing is to use the explorer window in Vegas Video 4 to highlight the file names, and look at the information it shows about that file (as opposed to dropping the file on the timeline and checking media properties there).

I just tried DVDA 1.0c to see what it says (using the explorer and right clicking to bring up 'properties').

DVDA seems to make no pronouncement one way or the other on two uncompressed AVIs I tried (one where I tried to produce an uncompressed AVI in VV as described in my last append, and one produced by Adobe Premier 6.0).

DVDA does seem to show an interlaced/progressive property on some MPG files I tried though, and the results seem to match both what I expected and what the 'bitrate viewer' program I have indicates.

I've been assuming that there's a progressive/interlaced attribute specified in the AVI file, and that VV was reading this. Is there really no such bit in uncompressed AVI files?

What has me confused is that VV 4's explorer window shows me an Interlaced/progressive attribute for the two uncompressed AVI files I have. The one produced by VV 4 always comes up interlaced regardless of what I specify for field order.

I previously produced another uncompressed AVI in Adobe premier 6.0 where I specified progressive/No Fields for the render type, and VV 4 says 'progressive' for this AVI. So, it seems to be making a determination of some sort.

I think you're telling me this determination is really a guess based on other characteristics.

Is there a good way to tell if a file is really progressive or interlaced? I tried to figure out how to get Adobe Premier 6.0 to tell me if a file is progressive or interlaced, but couldn't immediately see it (I don't use Premier much so this could just be me).

My 'bitrate viwer' only seems to work for compressed files, so it doesn't help for the uncompressed ones. I'm not sure if TMPGenc+ 1.512 will tell me the type of source or not.

At this point I really just need a format I can use between VV and TMPGenc that is not 'lossy', and uncompressed seemed like it would be a sure bet. If the file VV is producing is really progressive, then that would be fine to.

Thanks;

-Greg Bohn
gbohn wrote on 6/2/2003, 1:13 PM
Oops, forgot one more question. You said:

>AE sees it as progressive

I'm not familiar with what 'AE' is...

Thanks;

-Greg Bohn
SonyEPM wrote on 6/2/2003, 1:36 PM
The progressive uncompressed .avi file produced coming from Vegas 4.c really is progressive, so all should be cool there.

AE = Adobe AfterFX
gbohn wrote on 6/2/2003, 1:55 PM
>The progressive uncompressed .avi file produced coming from Vegas 4.c really is
> progressive, so all should be cool there

Thanks. Just to be clear, is this a situation where

A) There is a bug in the way VV 4 marks or displays the uncompressed file as
progressive/interlaced

B) The VV Explorer attribute display is just a guess, and the guess it makes is
not correct in this particular case

or C) something else.


-Greg Bohn
SonyEPM wrote on 6/2/2003, 2:15 PM
B