Question about decklink video cards, audio sync and WireCast

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  • Joined: Tue Feb 27, 2018 9:12 pm
  • Location: Greensboro, NC - USA
  • Real Name: Dennis Hopson

Question about decklink video cards, audio sync and WireCast

PostTue Feb 27, 2018 9:43 pm here.

I am currently running a simple streaming setup with an Intensity Shuttle: single camera and audio direct from mixing board (classical music streaming/higher education). I'm looking at expanding this system to include multiple-cameras but still only one audio source (of course).

Currently, I'm considering a custom PC with DeckLink video cards. With this setup, are there potential issues with audio synch (or even video sync) since none of these cards are locked together. I know in audio world, at a certain point, you have to run word clock to avoid sync issues. Is the same true here?

Also, I'm using WireCast as my software of choice for streaming. Would each of the channels of a DeckLink Duo 2 appear as independent channels in WireCast as viable video sources or would I have to have separate cards, such as the Mini Recorder in order to accomplish this? The 'soft' switching in WireCast would make things a lot easier...especially given 80%+ of what we are doing (c)would remain in this program.

Thanks for the help and advise.
Dennis Hopson
House Manger/Recording Engineer/Live-Stream Coordinator
School of Music
University of North Carolina at Greensboro
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Jack Fairley

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Re: Question about decklink video cards, audio sync and Wire

PostWed Feb 28, 2018 1:36 am

Duo 2 should appear as separate inputs.
Threadripper 1950X 3.7GHz
64GB DDR4-2666
2x GTX 1080 Ti
DeckLink 4K Extreme 12G
Resolve Studio 15.1.2
Windows 10 Pro 1803

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