Android Question Make a video call in background

[youjunjer]

I have a project to help Emergency Medical Technician for connecting to the hospital.
When EMT do the operation, he make a voice and video call to center on android to get some advices from doctors.
After operation, this video and voice will be recorded on the server become
evidence.
But voice call is only one part of this app, we provide operation brife, location, gis, navigation, and some other features.
So this function will run at background, it can't be skype or facebook that app will take control of phone.
But if skype facebook facetime open some api or sdk for making call in background will be fine for this project.
Anyone has good ideas?

 

[coslad]

unfortunately easyrtc is not updated since 2016, I tried to install the server side into a window machine but by client side chrome not words because chrome need a https connection and I can't get a ssl certificate for a in home server. it works only with Firefox but each time I try to connect, it comes out system allow message for multimedia access.