Fri Jun 02, 2017 4:40 am
I have that exact switcher, and use the HDMI inputs regularly with direct computer sources. The good news is that the frame rate of the computer does not need to exactly match the system frame rate (i.e., you can run the computer at 60HZ while the ATEM is at 59.94Hz). However, you will need to set the computer output to 1080i to match your system resolution for the cameras.
Now for the bad news. If the ballroom has such an antiquated system, it's quite likely that you will need a more expensive scaler to overcome the limitations of the installed system. With a VGA connector, I would be asking for the projector specs in the system. Its possible it can accept 720p on that connector, however an Decimator MD-HX is digital only, so can't do the digital to analog conversion. The best solution in this case would be a Barco ImagePro HD or ImagePro II, however as a rental, these can be a bit expensive. Other scalers that would also work include the Extron DVS 605 or Analog Way Pulse.