from the choice of heatsink and the shielded BNC connectors it looks like one of the AVerMedia designs.
I haven't found the model yet, still looking
it's pretty close in design style to this one
Avermedia NV 5000
note the choice of connectors, labelling, capacitors, socketry.
Not on this model, but their other models use the same heatsinks
I'd email the pic to AVerMedia and ask them to confirm, it is either one of theirs or they know who re-badged it.
(and ask them to fix their slow-n-crappy web site while you are there - the product pics are awful)
btw, while you're in the IT room adding CCTV, fix your webserver, it's down
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