720 x480?

[David Roth weiss]

[mudbutter] ” I’ll just cut it in the 480 time line and in the end drop it into the 486″

Perfect!!! Thats the way I’d do it…

[David Roth weiss]

[Dave LaRonde] “So you can’t really call it an Avid peculiarity.”

Dave,

You completely missed the point.

Of course we all know that 720×486 is typical of all the formats you mentioned and not just an Avid thing. DUH!!!

However, Avid converts native 720×480 DV to 720×486 because that’s the native pixel dimension of its card.

DRW

[Sean Oneil]

You NEVER want to scale between 480 and 486. Never. This is a lossy process and there’s no reason to do it. Instead you want to either crop 6 lines, or add 6 lines of black depending on which way you’re converting it. FCP handles this automatically, and it compensates for the field dominance reversal by adding a “shift fields” filter as Walter mentioned.

The extra 6 lines are well within the overscan area. So you can go back and forth between 480 and 486 a million times this way and it won’t affect the viewable image.

Sean

[Joelathens]

hi, i noticed this thread during a search. because I use liquid and never realized that it doesnt offer 720×486 timelines. Am I getting a lossly conversion when i capture DV, edit, and then Export to DVD with Liquid?
The mods at Avid say no, that 720×486 is NTSC standard

[Sammy Ww]

thanks for the advice

[Uli Kunkel]

I’m digitizing footage from HDCAM, center crop, 23.98 DV, but since this is a spot for broadcast, it’s being requested at 720×486. This is especially important for the editor because he also does his own greenscreen FX work in After Effects, so he needs it at the output resolution.

How would you suggest I digitize the footage then? DV then use compressor to change the frame size afterwards?

Powermac G5 Quad 2.5
3 GB RAM
Quaddro 512MB Video Card
Kona LHe

[Uli Kunkel]

Here’s what I ended up doing:

I set the HDCAM deck to down convert (23.98 w/ PD). Center crop.

SDI into the Kona.

I created a custom capture setting in FCP that digitizes 525i 29.97 with Photo – JPEG codec at 720×486 frame size and Pixel Aspect Ratio.

After digitizing, I highlighted all the clips and used Cinema Tools Reverse Telecine, bringing the footage back to it’s original 23.98 frame rate.

Works great!

Powermac G5 Quad 2.5
3 GB RAM
Quaddro 512MB Video Card
Kona LHe

[Uli Kunkel]

Actually, I have to reneg what I just wrote. Even after the Cinema Tools reverse telecine, I’m still getting interlaced frames. It only seems to work with DV unless I can somehow figure a way to get the deck to spit 23.98 out of the SDI.

Powermac G5 Quad 2.5
3 GB RAM
Quaddro 512MB Video Card
Kona LHe

[Uli Kunkel]

It’s not DV. It’s HDCAM shot at 23.98. I have the deck set to Down Convert to SD, sending 23.98 with pulldown to the Kona card. It’s just a standared 3:2 I believe. It’s not Advanced.

Powermac G5 Quad 2.5
3 GB RAM
Quaddro 512MB Video Card
Kona LHe

[Uli Kunkel]

Ya, I know. Tell me about it.

This is just what he’s used to working with though. He takes all the shots, edits them in After Effects and does all his FX work at the same time. Usually online in Smoke.

Still having a hell of a time with this. Do you know if it’s possible for Kona LHe to do realtime down convert to SD via HDSDI?

Powermac G5 Quad 2.5
3 GB RAM
Quaddro 512MB Video Card
Kona LHe