Decklink 8k pro outputs

[willtom]

After a bit of advice. In the resolume manual it says:

Blackmagic SDI outputs always require an external hardware reference clock to stay sync.

Is that only when using more than one card? Do all the sdi outputs on a single decklink always stay in sync with each other regardless of external sync, or is every sdi output completely independent of the others as far as sync is concerned?

[willtom]

Arvol has previously answered this here
viewtopic.php?t=17288

The outputs of a single decklink are not synced with each other

[herberttropiano]

I use an RTX4000 to push videos with BMD Decklink Quad 2 outputs, I still haven't had any problems with synchronization!

[Arvol]

I use an RTX4000 to push videos with BMD Decklink Quad 2 outputs, I still haven't had any problems with synchronization!

BMD SDI outputs on a single card are NOT sync'd. The AJA Crovid line is:
https://www.aja.com/products/corvid-88

[herberttropiano]

Ever used 2 or more Corvid on the same computer? If yes, how do you sync it?

[Arvol]

Ever used 2 or more Corvid on the same computer? If yes, how do you sync it?

I haven't but their SDK is wide open for sharing clock sources. They also have a ref in, so I would recommend using a genlock sync gen on any connected devices anyways. So with either the SDK or the sync gen should work. I have a BMD decklink quad 2. Works great for sending to separate displays, but it will give you tearing if you try to mosaic them.