I have a bit of a difference between the 2 outputs (external 1 and 2), when i run them from one machine to the other.. Any way to fix this?

Both images are from the same camera filming a screen with BBC sound/video sync on youtube. One is external output 1 which is the program (vmix) mix, the other one is taking from the camera directly.

Not sure why this would happen but the first thing I would do I make sure that both cards have the most up to date and same firmware. Check that they are both the same version. A difference of firmware could potentially cause different results.

Indeed we use 2 bm cards, so now i'm looking into the decklink duo to solve this issue. What is weird though, is that dropped frames are reported to be caused by frame drops of the source. Since both outputs use the same source, I would assume they would drop the same frames. If it was caused by harddisk or cpu I would understand it as a bandwidth issue.

Good remark! Indeed it would be nice to hear Martin's say about this, i will try to swap outputs and see if there is a priority for the program feed.

Thanks for testing! Our system is an i7 2600k, with 16 gb ram and a gtx 950 videocard. It will handle only 3 cams during the event, so normally i suppose that should be ok, right?

Wow, that would be very nice. By the 30th we should do the gig, I just called the guy and he said it better be perfect, and otherwhise we should tell him in advance :) In the worst case i will go rent a videomixer, but since i bragged so much about vmix, showed him all the options, I think both him and me would be disapointed :)

Thanks Martin,

But might the ability to clock the decklink duo to external sync make them run in sync?

That would be a nice solution as well!

You think the syncing would be better from the fullscreen output? Since i'm not getting any information about dropped frames about that, it scares me a bit, but i can try :)
We have a gtx 950 in the system, so that should be fine I think.

Reading about the quad card from blackmagic, i saw they also have some sort of genlock running:

DeckLink Quad is four independent SDI capture and playback cards in one! Includes four SDI inputs and four SDI outputs that can be independently switched between SD and HD video formats, as well as a common black burst/tri-sync input for all four channels. DeckLink Quad appears as four independent SDI cards to the computer, but only uses a single PCI Express slot. DeckLink Quad includes a built in watchdog timer under API control with bypass relays for a robust broadcast solution that automatically switches to bypass if power is lost, or software crashes. That's perfect for broadcast servers! Each SDI input and output can be a different video standard as they are all completely independent.

Is this what you were thinking off Martin? Since a 4in/output card would better suit our needs for future broadcasts. The AJA would only be used later for very big broadcasts, but since this is a one time job (for now), i'm also looking for cheaper solutions.

Richard: I'm going to run a test with the videocard outputs tonight, would be cool if it actually works, but i can already see the worried faces of the head of production if he sees it :) Still.. If it works, why not use it lol :)