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720p 30?

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peter tours
720p 30?
on Mar 1, 2011 at 8:35:03 pm

First I am old - for most of my career video had 29.97 frames. I could deal with that.

My crew is now shooting P2 DVCPRO HD 1080p 30. My clients want SD masters. Since I am more foresighted than them of course I make my masters HD. Someday they will thank me. I am editing in 720p sequences as I like to reposition the footage in post ;)

Now my question: why isn't there a 720p 30 or 29.97 AJA Kona Lhi setting? There is an Apple setting for it, but then I have to use a DVI monitor instead of my trusty Sony video monitor.

And yesterday I got quite a shock when I dropped my first 59.94 file into DVCPRO 50 timeline and though it played back properly my 2 minute movie registered only 1 minute of time code - argh!

But I digress....can someone explain to this old guy why there is no such AJA Kona Lhi setting? Is there a technical reason? Or does it exist somewhere hiding on my puter?

Thanks in advance for any advice!

Peter Tours
TnT Video Services, Inc.
Fort Lauderdale, FL


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Arnie Schlissel
Re: 720p 30?
on Mar 1, 2011 at 9:38:38 pm

Because, according to SMPTE, ITU, EBU and the NTSC, there's no such thing as 720P30, only 720P60 (actually 59.94) and 720P50. IOW, the broadcast standards for 720P are frame rates of either 59.94 or 50 frames per second, not 29.97 or 25. Your broadcast monitor probably can't even play 720 at those frame rates.

Arnie
Post production is not an afterthought!
http://www.arniepix.com/


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AJA Sales Department
Re: 720p 30?
on Mar 1, 2011 at 11:17:20 pm

Peter,
You can simply use the existing Apple-provided Easy Setup to create a basis for your own custom 720p Easy Setup. You can do this by first opening the Apple-provided Easy Setup, then going into the Final Cut Pro>Audio/Video Settings...>A/V Devices and change the Playback Output>Video selection to the the AJA 720p 59.94 8 Bit selection. Set the Playback Output>Audio selection to the AJA device as well. Click on the Summary Tab of the Audio/Video Settings window and select the Create Easy Setup... button at the bottom. Name and describe the new Easy Setup as you see fit, hit Create... and Save when prompted.

While AJA provides a very large amount of Easy Setups, it is difficult for us to supply every possible combination users might want. But, it's possible to create your own as needed.

If you need additional information or assistance, don't hesitate to contact AJA Technical Support.

--
AJA Video Systems
+1 (530) 274-2048 Intl.
(800) 251-4224 US
sales@aja.com


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peter tours
Re: 720p 30?
on Mar 1, 2011 at 11:23:26 pm

I was doing it bass ackwards by trying to change a Kona preset rather than adding the Kona to the Apple preset. Thanks!!!!!! I will try it tomorrow.

Peter Tours
TnT Video Services, Inc.
Fort Lauderdale, FL

TRI EA5 1974-1977
Convergence ECS1B 1977-1979
Sony BVE 500 1979 - 1984
Datatron Vanguard 1984 - 1993
GVG VPE141 1993 - 1998
Media 100 1995 - 2006
Final Cut Pro 2005 to infinity and beyond!


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Jeremy Garchow
Re: 720p 30?
on Mar 2, 2011 at 12:44:19 pm

In all honesty, I'd use a Kona 720p23.98 VFR easy setup.

Duplicate it all and change 23.98 to 29.97 everywhere 23.98 is mentioned. Leave everything else the same.


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peter tours
Re: 720p 30?
on Mar 2, 2011 at 12:51:00 pm

I tried that but could'nt figure out what to set the Compressor drop down in the settings window - only 720 30 (29.97) is HDV not DVCPROHD or Uncompressed. That's why adapting the Apple 720p 30 preset to add the AJA seems simpler. But I can be persuaded otherwise with compelling advice.

Peter Tours
TnT Video Services, Inc.
Fort Lauderdale, FL

TRI EA5 1974-1977
Convergence ECS1B 1977-1979
Sony BVE 500 1979 - 1984
Datatron Vanguard 1984 - 1993
GVG VPE141 1993 - 1998
Media 100 1995 - 2006
Final Cut Pro 2005 to infinity and beyond!


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Jeremy Garchow
Re: 720p 30?
on Mar 2, 2011 at 1:07:21 pm

The name of the dvcpro hd codec is 720p60 but it's just the name.
It can be used with 23.98, 29.97, or 59.94.

If you want to use dvcpro hd, use the dvcpro hd 720p60 compressor, but set the frame rate to 29.97.

That's why using the kona 23.98 VFR easy setups are easy. Just have to change 23.98 to 29.97. All the rest of the settings (deck control, video output, et al.) stay the same. You would then reamme these duped settings as 720p29.97 VFR.

If you'd rather use prores, then start with a kona 720p23.98 VFR setting, duplicate and change to 29.97. You should be doing all of this in the "audio/video settings" pref window.

Hope that makes sense.

Jeremy


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