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02-19-18 10:50:15 AM

Jul - Computers and Technology - Guy Needs a Capture Device New poll - New thread - New reply
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GuyPerfect
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Posted on 07-21-14 08:49:44 AM Link | Quote
I think it's high time I get an HDMI capture device. But they're mildly pricy, and I don't want to risk getting one that doesn't do exactly what I want it to do, so hopefully one of you fine folks can help me make the decision.

Here's what I want:
  • Accepts unencrypted HDMI input (or DVI where I can use an adapter)
  • Can accept/record at least 1080p at 60hz
  • Works as a standard input device on Windows
    • Must work with VirtualDub and similar recorders
    • Should preferably work with Skype, but if something like SplitCam is needed to make Skype think it's a camera, that's fine
  • $150 USD is about as high as I'm willing to spend on it
  • Interface (USB, PCI-E or what-have-you) doesn't really matter
  • The less latency between signal input and on-screen display, the better.
There. Couldn't be simpler.

Anyone can halp?
Joe
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Posted on 07-21-14 09:47:24 AM Link | Quote
Originally posted by GuyPerfect
1080p at 60hz
$150 USD
I suspect these two requirements are mutually exclusive. (The cheapest device I can find that is capable of 1080p60 over DVI/HDMI is about $600.)

However, if your source is capable of 1080p30 YUV 4:2:2 and you don't mind the hit in quality, this capture device should meet all of your other requirements.
GuyPerfect
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Posted on 07-21-14 11:45:40 AM Link | Quote
I'm noticing a curious spike in the price point when going from 1080p 30hz to 1080p 60hz. I'm beginning to think that PCI-Express isn't fast enough to pass through a 60hz signal un-processed, so the extra cost comes from the vendor's innovations to squish the signal down enough to get it to the CPU in time.

That in mind, I'd be willing to go higher on the price, provided I have a guarantee that all the specs are to my liking.
Joe
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Posted on 07-21-14 04:26:13 PM Link | Quote
Originally posted by GuyPerfect
I'm beginning to think that PCI-Express isn't fast enough to pass through a 60hz signal un-processed,
It's plenty fast enough. A 1080p60 10-bit 4:4:4 signal is about 3.7Gb/s. A PCIe ×4 link is capable of up to 8Gb/s.

According to the fine print, both of the capture devices I suggested are capable of capturing uncompressed, although only the more expensive one is capable of 1080p60.
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Jul - Computers and Technology - Guy Needs a Capture Device New poll - New thread - New reply




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