pitofono - part 2

My top priority is video acquisition and streaming. So I investigated a little and I choose motion as the software component for this task: low requirements, it can stream via http in mjpg, and it’s very configurable. After a while i found a compatible video source (the video out of my reflex): turns out that in 2017 it’s difficult to have a device with an analog video out…

After a bit of fiddling I’ve got it working. Motion is not very resource demanding, and I need only the streaming feature, not the motion detection or the video/snapshot generation. Also a good feature is the video loopback: when a software is using a v4l2 device (say /dev/video0) this is blocked by the process and inaccessible to other processes, the loopback is able to create a “clone v4l2 device” accessible to other programs.