Raspberry PI WebCam
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Webcam
lsusb
Bus 001 Device 004: ID 046d:082c Logitech, Inc. HD Webcam C615
Software
qv4l2 Videograbbing
see https://wiki.ubuntuusers.de/Videograbbing/
sudo apt-get install qv4l2
qv4l2
fswebcam
Installation
sudo apt-get install fswebcam
Script to take pictures (remotely)
#!/bin/bash
server=pichess
pic=chess$$.jpg
resolution=640x480
# https://raspberrypi.stackexchange.com/a/29284/11220 - skip some frames to adjust exposure
ssh $server fswebcam -r $resolution -S 10 -d /dev/video0 /tmp/$pic
scp $server:/tmp/$pic /tmp/$pic
open /tmp/$pic
motion
lsusb | grep cam
Bus 001 Device 005: ID 046d:0825 Logitech, Inc. Webcam C270
sudo apt-get install motion
v4l2-ctl -V
Format Video Capture:
Width/Height : 352/288
Pixel Format : 'MJPG' (Motion-JPEG)
Field : None
Bytes per Line : 0
Size Image : 102400
Colorspace : sRGB
Transfer Function : Default (maps to sRGB)
YCbCr/HSV Encoding: Default (maps to ITU-R 601)
Quantization : Default (maps to Full Range)
Flags :
Uv4l trial on Buster
As of 2019-10-15 there is no official Buster support for uv4l yet see e.g. https://www.raspberrypi.org/forums/viewtopic.php?t=247305
We will try using the commands for Raspberry Stretch
curl http://www.linux-projects.org/listing/uv4l_repo/lpkey.asc | sudo apt-key add -
echo "deb http://www.linux-projects.org/listing/uv4l_repo/raspbian/stretch stretch main" >> /etc/apt/sources.list
sudo apt-get update
sudo apt-get install uv4l
sudo rpi-update
sudo apt-get install uv4l-server uv4l-uvc uv4l-xscreen uv4l-mjpegstream uv4l-dummy uv4l-raspidisp
sudo apt-get install uv4l-webrtc
Check Webcam being identified
dmesg | grep video
[ 4.691736] videodev: Linux video capture interface: v2.00
[ 4.838925] bcm2835-codec bcm2835-codec: Device registered as /dev/video10
[ 4.844913] bcm2835-codec bcm2835-codec: Device registered as /dev/video11
[ 4.852532] bcm2835-codec bcm2835-codec: Device registered as /dev/video12
[ 4.989574] uvcvideo: Found UVC 1.00 device HD Webcam C615 (046d:082c)
[ 5.028207] uvcvideo 1-1.2:1.2: Entity type for entity Extension 5 was not initialized!
[ 5.028226] uvcvideo 1-1.2:1.2: Entity type for entity Processing 2 was not initialized!
[ 5.028238] uvcvideo 1-1.2:1.2: Entity type for entity Camera 1 was not initialized!
[ 5.028250] uvcvideo 1-1.2:1.2: Entity type for entity Extension 6 was not initialized!
[ 5.028261] uvcvideo 1-1.2:1.2: Entity type for entity Extension 7 was not initialized!
[ 5.028273] uvcvideo 1-1.2:1.2: Entity type for entity Extension 8 was not initialized!
[ 5.028968] usbcore: registered new interface driver uvcvideo