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Old May 18th, 2011, 07:29 AM   #1
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I/O card frame rates

I'm still trying to figure this out. If I am using a video card, for color correction (like a Blackmagic or Kona), and its listed frame rates supported are HD: 1080i50, 1080i59.94, 720p50, 720p59.94, does that mean if I am working in a 24p or 30p time line, that I won't be able to monitor through this card? I'm looking at cards, with HDMI to monitor a broadcast quality signal, for color correcting, and I am trying to figure out the whole "frame rate supported" thing. I'm on an all digital workflow, so I am not as much concerned with ingestion of video, as I am the signal that the card outputs to my color correcting monitor.

Can anyone offer a little clarification on the subject?

Jeff
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Old May 18th, 2011, 06:49 PM   #2
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Re: I/O card frame rates

Usually, the cards will always output to an NTSC/PAL standard..Meaning, that if you've got 23.976FPS footage, the card knows to display the proper fields to the monitor. It does it internally (pulldown) and displays accordingly...

Same with progressive frame rates.
At 30FPS, the card should split the frames into fields for proper display on NTSC monitors...


In many cases, you have to use the cards' presets, or even ingestion via I/O to be able to have any acceleration, colour correction or realtime playback...
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Old May 18th, 2011, 09:34 PM   #3
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Re: I/O card frame rates

Thanks for the reply. My interest is using a lower end Blackmagic Intensity card, HDMI out, to a Panasonic Plasma TV (that is ISF calibrated to 709 standards), as my Color correcting monitor. I've read that the Panasonic Plasmas are being used as client monitors, in many color houses. While not being a true broadcast monitor, it is pretty close. My intention is to start with this, until I could afford a true monitor. I will be filming in 24p, and was worried if the card didnt support that frame rate, It would be useless to me. I have learned that the Intensity now supports 24p playback. So it might be a low end option for me.
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Old May 19th, 2011, 05:36 PM   #4
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Re: I/O card frame rates

Just make sure that your camera 24P (some cameras use different flagging methods) works with Blackmagic presets of 24P....

Now, if you're looking at ingesting 24P, working with 24P natively, and having 24P on the monitor, then you need to make sure that the monitor, card, and NLE will support this workflow...

If it's a lower end card, then i suspect it will apply pulldown for proper monitor playback...
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