Standalone system based on Raspberry Pi. Now with a laser cut frame and video streaming working.
Status as of 2012.09.14
I could not make the old webcam (Microsoft VX-1000) to work in Raspbian or Arch (tried mjpg-streamer, ffserver+ffmpeg, motion) so I have tried a new one Microsoft Lifecam HD-3000. This one is able to stream directly in MJPG format (v4l2-ctl --list-formats).
This one worked with my modified mjpg-streamer so, needing audio, I have tried gstreamer (just video for now) and it works under Raspbian.
In Raspbian, I have installed gstreamer with this command:
apt-get install gstreamer-tools gstreamer0.10-plugins-bad gstreamer0.10-plugins-good
For some reason, gstreamer did not worked with the better quality formats reported by v4l2-ctl --list-formats-ext command.
The streaming with 640x480 and 15fps used like 2% of the CPU. The command used was:
gst-launch -v v4l2src ! image/jpeg,width=640,height=480,framerate=\(fraction\)15/1 ! tcpserversink host=<raspberry pi's IP address> port=5555 sync=false
The streaming with 800x600 and 30fps used like 10% - 13% of the CPU. The command used was:
gst-launch -v v4l2src ! image/jpeg,width=800,height=600,framerate=\(fraction\)30/1 ! tcpserversink host=<raspberry pi's IP address> port=5555 sync=false
I have displayed the video stream on a remote PC with VLC (tcp://<raspberry pi's IP address>:5555)
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TODO:
- streaming video with audio;
- stream with H.264 hardware encoding (I have no ideea how it can be done now);
- modify/adapt the system for robotic usage - remove the USB current limitation, get rid of the hub and, maybe, make an adapter board.