Two SDI inputs are perfectly sync?

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  • Posts: 1
  • Joined: Tue Jun 26, 2018 2:04 am
  • Location: Japan
  • Real Name: Takuma Ohya

Two SDI inputs are perfectly sync?

PostTue Jun 26, 2018 2:14 am


I am using a DeckLink Duo 2 to capture 2 SDI videos.
When I capture 2 inputs (as SDI A(for FILL) SDI B(for KEY)) at the same time, are these inputs perfectly synchronized?
Or, since these 2 inputs are internally different device, so does the capture timing shift?

If I want to capture SDI as perfectly synchronized FILL + KEY,
1) using 1 input as RGBA
2) using 1 input as SideBySide(Dual Link?)

Any other ideas? or related post?
Please advise me.


Takuma Ohya


  • Posts: 6
  • Joined: Mon Dec 24, 2018 2:05 am
  • Real Name: Milton Mobley

Re: Two SDI inputs are perfectly sync?

PostFri Dec 28, 2018 6:06 am

You seem to be asking if the two channels of the Duo are synchronized. I think a more important question is are the two devices providing the sdi inuts synchronized? If they are cameras I think the answer will be no unless they have an external timebase input feature driven by an external timebase generator.

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