On muse last year we used a Leitch sdi video switcher - switching between 8 or more camera inputs - a single sdi feed went to a decklink card.Originally Posted by Martin
We controlled the Leitch switcher from catalyst using a single dmx channel.
Zandar ( and others ) also make multi-image boxes, that put multi-streams onto a single sdi image. ( at one point on radiohead last year - we were talking about trying to get 16 video inputs at once - another solution was used in the end )
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Many companies make controllable sdi switchers - that can be controlled and switched from Catalyst.
They use quite simple protocols.
www.extron.com
www.leitch.com