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AVID Display

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Joseph Berg
AVID Display
on Jun 7, 2017 at 3:10:07 pm

Okay. I'm going to just come out here and say this first. I realize that this is a stupid question, but I'm trying to get a better understanding on this topic.

Right now, I'm running Media Composer 8.7.2 on a Mac Pro. I have two 27" Apple Monitors as well as the Panasonic BT-LH1850 to display my image. I'm utilizing the AJA T-Tap going from Thunderbolt to SDI to my monitor. My question is, do I really need this T-Tap device to display my image. Why can't I just go from HDMI on my Mac to HDMI on my monitor? Is there a quality difference?

Thanks! If this is in the wrong thread, I apologize.

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Shane Ross
Re: AVID Display
on Jun 7, 2017 at 5:56:08 pm

First off, the graphics card, while it might have multiple ports, say 3+...only TWO of them work at a time. They come with options, but graphics cards can only work on two monitors at the same time. SO if you did opt to do that, you'd lose a work monitor.

And yes, the quality is different. It's a COMPUTER DISPLAY signal vs VIDEO signal. Computer Display won't have the ability to show interlacing, for one. So 1080i59.94 won't display properly. Computer Display vs video has a different color space, you can't really do Rec709 on a computer display connection. If this is only to see what you are doing, and for a client to look at the cut for story, this is fine. But for critical viewing of quality and color, an IO like AJA and broadcast monitor or TV are recommended.

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Martin Fox
Re: AVID Display
on Jun 14, 2017 at 2:29:46 am

I'm using a Blackmagic mini monitor, to see the correct colour space, and to see the correct frame rate.
When computer monitor draws the frame , it does so in it's own time base which is different to afilm frame time base ( typically computer monitors refresh at about 60 HZ ), consequently you see tearing of any verticals in the image and a kind of juddering on pans, this because the monitor frame draw and the video frame draw are not synced.
When you use an output like your AJA they are synced.

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