How do you know it the clip is "upper" or "lo

FilmingPhotoGuy wrote on 9/8/2010, 9:15 AM

I ripped a bunch of VHS tapes to MPG's using a capture card. After I make a project, and set interlacing to none I import the MPGs in to the project.

How do I know if the MPG's are interlaced upper or lower. What is the workflow procedure when doing this?

Comments

LoTN wrote on 9/8/2010, 10:18 AM

Here is what I do:
- set project framerate at double of footage and progressive mode
- set deinterlace method to none
- set preview at best/full

Then walk thru the timeline frame by frame with scenes having objects in movement. If the field order is wrong, then you will get a kind of 'forward and back' in the preview window. Like if image n was displayed just after image n+1.

Hope this helps.

musicvid10 wrote on 9/8/2010, 11:28 AM

MediaInfo will tell you the field order.
Vegas Project Properties will tell you field order if you "Match Media Settings."
There isn't any workflow involved. Vegas takes care of everything for you.

TheHappyFriar wrote on 9/8/2010, 11:30 AM

in my experience, mpeg-2 captured directly to mpg is always the opposite of DV.

FilmingPhotoGuy wrote on 9/8/2010, 1:26 PM

Musicvid says Vegas Project Properties will tell you field order if you "Match Media Settings."

Where exactly do I set "Match Media Setting"?

I see a checkbox "Adjust source media to better to match project or render settings" in the project settings. Is this what you are refering to?

reberclark wrote on 9/8/2010, 1:33 PM

Unless I misunderstand the question, G-Spot (free!) will give you the info you want and more:

G-Spot

farss wrote on 9/8/2010, 1:49 PM

All any of those things will tell you is what the flags are set to. None of them will tell you what the field order actually is. The flags can be wrong. 'Lord of the newbies' method will tell you what the field order actually is.

Bob.

TheHappyFriar wrote on 9/8/2010, 6:10 PM

well, rendering a DVDRW with 3 seconds of the mpeg 2 & 3 seconds of a DV file on the same vegas TL will give you the same results. ;)

All you need to do is do it once for the capture card & you'll never need to do it again.

musicvid10 wrote on 9/8/2010, 8:40 PM

"Where exactly do I set "Match Media Setting"?"

Project Properties->Match Media Settings
It's the "folder" icon in the upper RH corner.

musicvid10 wrote on 9/8/2010, 8:43 PM

"in my experience, mpeg-2 captured directly to mpg is always the opposite of DV."

It can be either.

TheHappyFriar wrote on 9/8/2010, 8:49 PM

well of course it can be either, DV is both upper & lower, so that means mpeg-2 can be lower or upper! :)

But every NTSC mpeg-2 i've captured has been opposite of the DV I captured with that system: it's always been upper.

musicvid10 wrote on 9/8/2010, 9:02 PM

NTSC DV is LFF. No exceptions that I am aware of.

MPEG-2 for NTSC DVD is "often" LFF. My set top DVD recorder records UFF.

Again, no cause for concern. If there is a field order problem, one will know it right away. Only once has Vegas gotten it wrong for me.

FilmingPhotoGuy wrote on 9/8/2010, 9:55 PM

I remember John Cline mentioning that an AVI file does not have an identifying flag but most other formats do.

I tried Musicvid's method and it works.

farss wrote on 9/9/2010, 2:09 PM

That'll only work if you have a CRT based TV to view it on. Such TVs are no longer made. I'm not certain what the impact is of getting field order wrong on devices that do various forms of de-interlacing.
At the end of day it can pay considerable dividends to actually check that you have it right and it is possible to flip field order and not know you've done it.
Years ago I helped out one local Vegas user who'd had 500 DVDs pressed and sold a few hundred of them before he realised 3 of the 5 QT files he'd been handed from another editor had the field order flagged incorrectly. The method Lord of the newbies described is 100% foolproof. If you dig up an old thread where this issue was discussed at length you should also find a link to a free plugin someone kindly wrote for us that can correct field order by shifting one line. In some scenarios that is the only simple way to correct field order.

Bob.

gwailo wrote on 9/10/2010, 6:51 PM

I've found that Vegas 9 32bit doesn't report field order on clips properly.

But 64bit does. So just open it up in 64 to get the real answer.

rs170a wrote on 9/10/2010, 9:37 PM

If you dig up an old thread where this issue was discussed at length you should also find a link to a free plugin someone kindly wrote for us that can correct field order by shifting one line.

Bob, if I'm not mistaken, you're referring to the New plugin for dealing with Interlace problems thread and you were an active participant in it.

Mike