Hello, my church just got a data video switcher (Datavideo SE-650 switcher), it has four inputs but we use 3 cameras and 2 laptops (for easyworship) here. We used three inputs for the cameras and then connected both systems to a single system through vmix and then connected the vmix system to the third input on the switcher (that means we ended up using 3 systems.. 2 for easyworship, 1 for vmix). The issue we are facing right now is in overlaying. If we send a green screen background to the video switcher so as to key out the background and have our writeup at the bottom of the cameras as lower thirds, the video switcher changes the green screen to a black screen, with some green edges at the top making it impossible to use the chroma key effect. Also we made the main background transparent on vmix using the colour input, so that all our animated titles would show over the transparent background but we ended up getting this same black background on the switcher. Pls is there anyway to remove the black background from the the switcher? This would be really helpful to us.
Note: we've tried luma and linear keys but none has been able to key out this black colour. Is there any way to have a transparent background on the switcher, the switcher also changes the color of the animated titles from vmix to its desired color, giving us a very bad output. Pls is there anyway to resolve all these???

This is our first switcher and we've never used a switcher before, except of course vmix which we've been using for the past year. Any help will be highly appreciated.

Thanks for replying. We sent the feed through HDMI and not SDI.
If we use an image from easy worship and then use a transparent text from vmix over the image and send it to the switcher, it shows the text perfectly overlayed on the image. But once we remove the image and send d text with a transparent background, the black background shows up and it's impossible to remove with chroma, luma or linear keys.

Thanks, is there a way then of sending a single feed from one system through two HDMI outputs?? How do we go about it.

Also the black is solid and the write up is white but once we use the Luma key the black remains same, only the little black background in between the text becomes transparent. What we ended up doing for today's service was to use the mask settings to crop out the black background leaving a little black background surrounding the text but it didn't look right.. I'll play around with the settings a bit and see if I can come up with something (hope this works well with a single HDMI output from the vmix to the switcher??)