I know I've seen this mythical device in the past for composite video signals., but it's been some time. Does anybody know of a similar device for SDI? I want to dim video signals to prevent light pollution from a conductor camera during blackouts via DMX. Any lead would be most helpful.
I have not myself run across an SDI-passthrough box that would dim out the video by DMX control -- and it's the sort of thing I'd notice, and seems like it'd be useful -- but I think you'll find that putting a DMXdowser in front of the camera will be the closest you'll get.
Maybe look for an SDImixer or switcher and run a black signal as one of the feeds. Depending on the mixer and lighting console, it ought to be possible to cobble together switching or cross fading the feed based on a blackout event.
I have found that even with video black the monitors still put out a ton of light. Older plasma or new oled can go almost full black if adjusted, But backlit LCD's are awful. I've used ND gel over them to increase the black contrast but you may have to brighten up the camera image a bit to make them look usable, but fade to black is much darker.
I know Crestron controllers can talk DMX and have worked installations where architectural lighting, LED mapping and video all work in unison so in theory with the right programming you could just switch the feed to a black source upon a dmx trigger.
Simplest case an external dmxrelay could just trigger one of the contact-closure inputs -and that method would work with many other brands of control processors.