• Petus
• August 20 2016
• Raspberry Pi, Cubieboard, Banana Pi, BeagleBone, Orange Pi
• 2968 Reads
• 0 Comments

We know the CHIP computer, we connected to WiFi, we used UART, we tried WiFi speed connection and USB flashdisc, we measured power consumption during the boot and after boot and we blinked with LED.
Today, we use USB webcam. At first I wrote that's very easy and you can you use it for a Raspberry Pi Zero, a Raspberry Pi, a BeagleBone, an Odroid and another SBC's, where you use a debian or fork of the debian (an ubuntu, a minibian etc.). It's very simple.

Articles about the CHIP computer:
CHIP computer: first sight and comparison with Raspberry Pi Zero - pizero
CHIP computer: connection to WiFi, SSH, UART
CHIP computer: speed of USB, WiFi, current consumption and pictures from thermal image
CHIP computer: flashing OS, python, LED and blinking of LED after boot
CHIP computer: USB webcam
CHIP computer: I2C bus - AD7415 temperature sensor


How I wrote, I use debian without graphical environments. I use only a SSH connection for communication with the CHIP computer.
Hence, I was looking for program for controlling of USB webcam in a terminal.
You execute:
sudo apt-get update
sudo apt-get upgrade

And then install this program fswebcam:
sudo apt-get install fswebcam

Take a picture:
fswebcam -r 640x480 --jpeg 85 -D 1 web-cam-shot.jpg
fswebcam program name
-r resolution
640x480 resolution of webcam
--jpeg format of picture
85 quality (in percent)
D delay
1 1s delay
web-cam-shot.jpg name of picture
Another helpful tips:
--flip (direction)
--rotate (angle)
--no-banner no labels and banner in picture

Everything you find in help of program:
fswebcam --help

What next? You can connect a PIR sensor and if the PIR sensor is active, the CHIP computer takes a photo. For example.

Make a video
sudo apt-get update
sudo apt-get upgrade

Install libav-tools:
sudo apt-get install libav-tools

This command checks resolutions:
avconv -f video4linux2 -list_formats all -i /dev/video0

Make a video:
avconv -f video4linux2 -r 30 -i /dev/video0 test.avi
ctrl+c causes stoping of rendering.
30 framerate

Source of information:
http://askubuntu.com/questions/106770/take-a-picture-from-terminal
https://libav.org/avconv.html