Two-way audio for software ip camera

4
votes

I am trying to setup a raspberry pi box with a usb camera as a IP Camera that can be viewed from a a generic android IP Camera monitor app. I've found some examples on how to get the video stream, and that works, but what I also need is two-way audio. This seems to come out of the box in standalone network cameras -- any ideas how that works? I want to set it up in a way compatible with typical network cameras so that my cam can be used by any generic ip camera viewer app.

2
linuxcameragstreamerraspberry-piip-camera

2 Answers

2
votes

Well, the modern cameras nowadays implement the ONVIF protocol. This protocol specifies that you have a RTSP server that streams audio and video from the camera to the pc, but it also mandates a so called audio backchannel. It's a bit long to explain how it works, check it in the specs.

1
votes

ONVIF is the standard, but you could also install an existing SIP client and do a video/audio VoIP call rather than implementing ONVIF - depends on the long term goals of your project.