It will go on for many more lines, until you see: Failed to open video device /dev/video0: No such file or directory Started stream webcam server in port 8081 Motion continues using width and height from config file(s) Could not fetch initial image from camera motion-httpd: waiting for data on port TCP 8080 Failed to open video device /dev/video0: No such file or directory motion-httpd/3.2.12 running, accepting connections ffmpeg LIBAVCODEC_BUILD 3547904 LIBAVFORMAT_BUILD 3544067 Processing thread 0 - config file /etc/motion/nf Now run motion to see if it works: $ sudo motion Add yourself to the video group as well, to get around permissions hassles. If it doesn’t, then you must create them yourself. The installer should create a motion group and user, and add the motion user to the video group. On other distros, check the downloads page and installation guide for instructions.
Many moons ago, Debian dropped ffmpeg and replaced it with libav-tools (See Is FFmpeg missing from the official repositories in 14.04? to learn the gory details, and how to get ffmpeg itself if that’s what you really want). You also need libav-tools, which is a fork of ffmpeg.
So all you need to do is run apt-get install motion.
Installation is easy on Debian and Debian derivatives, because Motion is included in the standard software repositories. It stores image files in a directory of your choosing, and it does not require a database, though it supports MySQL and PostgreSQL if you do want to use one.įirst let’s look at how to get an IP camera working with Motion using my trusty Foscam FI8905W (figure 1), and then we’ll add a USB Webcam. Motion records movies and snapshots in JPEG, PPM, and MPEG formats, and you can view these remotely in a Web browser thanks to Motion’s built-in HTTP server. It works with any Linux-supported video camera, including all V4L Webcams, many IP cameras, Axis cameras, and it controls pan and tilt functions. Motion is a nice lightweight, yet capable application for operating surveillance cameras on Linux. Including various ways to measue linear distances, how linear encoders improve accuracy, the first consideration in choosing a linear encoder, and IoT functionality with linear encoders - at /category/linear-encoders.When you want something a little simpler and more lightweight than Zoneminder for operating surveillance cameras, try Motion.
Manual adjustment without a PC is also possible using the included pushbutton tool and simplified setup procedure that minimizes button-pushing complexity while maximizing operational flexibility. For more information, visit Read about linear encoders.
Configuration files can be saved for backup, replication, or for emailing to remote locations. Intuitive software features a simple-to-use graphical interface that allows drag-and-drop adjustment of the output characteristics.
Communicating to a PC over standard USB, Micropulse Plus outputs can be scaled, inverted, and configured for single- or two-magnet position, velocity, or differential position between two magnets. Dual bi-color LEDs handle double duty for diagnostics and as a setup aid for pushbutton scaling of the position outputs. Other improvements allow easier and more flexible configuration options during setup. Additionally, housing protection is to IP68 for pre-wired cables and IP67 for connector models. EMC severity for static, RF, burst, and line noise is Level 3 for surge, Level 2 and magnetic field immunity to Level 4. Shock ratings are to 150g and vibration rating to 20g.
This features ±50 µm for nominal strokes less than 500mm, ☐.01% of full scale for 500 to 5500mm, and ☐.02% of full scale from 5501mm to 7600mm. with the maximum non-linearity cut in half. Performance improvements include stroke lengths to 300 in. The advanced version Micropulse Plus features flexible output scaling and configuration using a PC interface.
Micropulse is fully backward compatible with Balluff’s Generation 5 products, yet delivers better measurement performance and environmental ratings. Debuting in the analog rod style housing, Generation 7 is available in two versions, Micropulse and Micropulse Plus. Florence, KY – Balluff has introduced the first of its new Micropulse Generation 7 linear position transducers, featuring improved measurement and environmental specifications, longer lengths, and more flexible setup than previous models.