vMix

If you ever find yourself in a situation like I did where you needed to bring in 8 people from 5 continents LIVE into the same news live stream (or just make your weekly tubecast), you might want to take a closer look at vMix and their vMix Live service!

It has pretty much everything you need in a video mixer with live streaming system built in, and it does it very well.

vMix is a Software Video Mixer and Switcher that utilises the latest advances in computer hardware to provide live HD video mixing, a task previously only possible on expensive dedicated hardware mixers.

vMix is a complete live video production software solution with features including LIVE mixing, switching, recording and LIVE streaming of SD, full HD and 4K video sources including cameras, video files, DVDs, images, Powerpoint and much much more.

Extensive featurelist, take a look here; https://www.vmix.com/software/features.aspx

There is a 60 day trial available, get it just to play with if anything :)