Mrinal,
What video standards? Are you looking for HD-SDI, analog video, or something different? Blackmagic has one that can be Ethernet controlled for a relatively good price (Videohub,
https://www.blackmagicdesign.com/developer/products/videohub), otherwise I will say that Vmix (video mixing software for Windows) is absolutely amazing if you would rather build up a machine with your own video I/O gear. If you are looking for something for an old standard, you might be able to get a great deal on the secondary market for an older video router off a production truck.
The big video gear manufacturers all offer some sort of remote protocol, like Ross Video, Evertz, and Grass Valley. But the exact needs and standards are key to finding something. Some have utility crates that can even be custom populated or expanded as needed.
At least, these are my 2 cents on it.
Josh EC
RadiaSoft LLC
(720) 502-3928 x704