Robobot webcam server

Revision as of 14:59, 10 January 2024

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View camera

A motion camera ser is installed called "motion", it can detect motion and save video-clip, if motion is detected.

Motion detection is the primary purpose, but being able to see what the camera sees.

Configuration file

Edit the configuration file

$ sudo nano /etc/motion/motion.conf

# File to write logs messages into.  If not defined stderr and syslog is used.
log_file /home/local/.motion/motion.log
# Target directory for pictures, snapshots and movies
target_dir /home/local/Video/motion
# Video device (e.g. /dev/video0) to be used for capturing.
videodevice /dev/video0
# The port number for the live stream.
stream_port 8081
# Restrict stream connections to the localhost (if on).
stream_localhost off
# Image width in pixels.
width 640
# Image height in pixels.
height 480
# Maximum number of frames to be captured per second.
framerate 10

run motion

To run the streamer, SSH to the robot and start motion

$ motion
[0:motion] [NTC] [ALL] conf_load: Processing thread 0 - config file /etc/motion/motion.conf
[0:motion] [NTC] [ALL] motion_startup: Logging to file (/home/local/.motion/motion.log)

Stop by ctrl-C

Note! Remember to stop the streamer before using the camera for other purposes. There is an alternative if you want both:

Start a loopback feature to create a copy with the same information when the camera is opened. Run:

sudo modprobe v4l2loopback

When /dev/video0 is opened a /dev/video1 will be created (with the data determined by the first user).

- not tested much.

View the stream

To view the result, use a browser to the address of the robot and port 8081, e.g. if the robot has IP '192.168.1.151':

192.168.2.151:8081

You should now see a stream of default 640x480 at 10 FPS as default; more options are available in /etc/motion/motion.conf.