Field dominance question urgent!!!

[Walter Biscardi]

NTSC is lower field first.

Walter Biscardi, Jr.
https://www.biscardicreative.com

Director, “The Rough Cut”
https://www.theroughcutmovie.com

Now Posting “Good Eats” in HD for the Food Network

“I reject your reality and substitute my own!” – Adam Savage, Mythbusters

[Paul Nevison]

thanks walter…super speed!!!

in this particular case as the final output is for NTSC dvd should i set the field dominance to none?

the mpeg file i have already encoded plays fine on the computer monitor but stutters when played back on my broadcast monitor….i assume that’s because of the fields of the monitor and lack of fields on the apple display.

anyway back to the original question….should i set dominance to lower or none?

thanks

G5 DP 2.0
2.0G RAM
OS 10.4.4
QT 7.0.4
FCP 5.0.4
BMD Decklink Extreme 5.4.2
PAL Land

[Doug Bassett]

This depends on the original field order (different from field dominance) It sounds like the fields were reversed on encode so do the opposite of what you did.

You can determine what order your system is (now a days sytems are lower but there are some old systems out there that are upper) by looking at every 5th frame of a field rendeed clip. If the clip is upper and you are on a lower field sys then the fith frame will look e some action is going backwards in one of the fields.

Just make sure all field orders are the same all the way through the project. This is determined by your capture system.

[Walter Biscardi]

[paul nevison] “anyway back to the original question….should i set dominance to lower or none?”

I always set dominance to Lower for NTSC dvd’s.

Walter Biscardi, Jr.
https://www.biscardicreative.com

Director, “The Rough Cut”
https://www.theroughcutmovie.com

Now Posting “Good Eats” in HD for the Food Network

“I reject your reality and substitute my own!” – Adam Savage, Mythbusters

[Paul Nevison]

thanks guys,

i’ll let you know how it turned out in about 8 hours once the encode is done….sheesh….bring on the distributed rendering !!!!

G5 DP 2.0
2.0G RAM
OS 10.4.4
QT 7.0.4
FCP 5.0.4
BMD Decklink Extreme 5.4.2
PAL Land

[Walter Biscardi]

[paul nevison] “i’ll let you know how it turned out in about 8 hours once the encode is done….sheesh….bring on the distributed rendering !!!!”

Have you thought about doing a short test, say 10 seconds of the video? I do this all the time when I’m unsure of how the finished product will look.

Simply encode a short sample and then play it back in DVDSP. You can pretty much tell right away if the interlacing is screwed up because it will look pretty bad. Pick a sample with either a lot of camera movement or talent movement.

Walter Biscardi, Jr.
https://www.biscardicreative.com

Director, “The Rough Cut”
https://www.theroughcutmovie.com

Now Posting “Good Eats” in HD for the Food Network

“I reject your reality and substitute my own!” – Adam Savage, Mythbusters

[Lars Bunch]

Hi,

I spent months dealing with this stupid problem and what I finally discovered is that Compressor defaults to GUESSING the field dominence. And sometimes it doesn’t guess right. When it guesses the wrong dominence, you will end up with an mpeg file that looks fine on the computer, but stutters when played back on an NTSC monitor.

When you open Compressor, you get a selection of presets. You can make copies of these presets and then set the field dominence to top or bottom. NTSC uses Lower (AKA bottom, AKA Even) field dominence.

Save a preset that ALWAYS selects bottom field dominence. This should work for most situations. But as mentioned above, you should do a quick test on a small section of footage.

Hope this helps.

Lars

[Paul Nevison]

hey guys

yes i thought about doing the test but i think it was the dominance issue so i just selected lower instead of auto….the problem with testing in DVDSP is that it looked fine…it wasnt until i got the movie on dvd and played it on a domestic dvd player and tv that i saw the field issue.

i read in the manual that DVDSP can preview out to a monitor….when i look in the options though it only gave me the choice of the viewer window or the cinema display.

how do you get it to play the output to my sony monitor?

thanks

G5 DP 2.0
2.0G RAM
OS 10.4.4
QT 7.0.4
FCP 5.0.4
BMD Decklink Extreme 5.4.2
PAL Land

[Graeme Nattress]

Both PAL and NTSC DV are lower. In compressor, it’s wise to tell it that the incomming video is lower (if that’s what it is) as it can often guess wrong. Also, be sure to test what the NTSC looks like before making an MPEG2, and if you need me to help with that, if you don’t have NTSC monitoring equipment, get in touch.

Graeme

– http://www.nattress.com – Film Effects and Standards Conversion for FCP

[Paul Nevison]

hey graeme,

the ntsc looks fine…easy setup 10bit NTSC and viewing via my sony PVM 20L4 monitor, it’s switchable PAL/NTSC. the source video is 10bit NTSC (transcoded from 10bit PAL) by the way and not DV

im just burning a disc now so I’ll now soon enough if the field dominance is the issue.

thanks 🙂

G5 DP 2.0
2.0G RAM
OS 10.4.4
QT 7.0.4
FCP 5.0.4
BMD Decklink Extreme 5.4.2
PAL Land