树莓派之网络摄像头配置

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安装支持库

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$ sudo aptitude install libjpeg8-dev imagemagick libv4l-dev cmake

编译mjpg-streamer

当前用户是pi，目录是/home/pi/。

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$ git clone https://github.com/jacksonliam/mjpg-streamer.git
$ cd mjpg-streamer/mjpg-streamer-experimental/
$ sudo make clean all
$ cd ..
$ sudo chown -R pi:pi mjpg-streamer-experimental/

编写启动脚本

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$ sudo vi /etc/init.d/webcam

脚本内容

修改代码中第15行的DAEMON变量为mjpg-streamer的执行目录。

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#!/bin/sh

# /etc/init.d/webcam

### BEGIN INIT INFO
# Provides:          webcam
# Required-Start:    $network
# Required-Stop:     $network
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: mjpg_streamer for webcam
# Description:       Streams /dev/video0 to http://IP/?action=stream
### END INIT INFO

DAEMON=/home/pi/mjpg-streamer/mjpg-streamer-experimental
WC_USER=user
WC_PASSWORD=password
WC_PORT=12345

f_message(){
        echo "[+] $1"
}

# Carry out specific functions when asked to by the system
case "$1" in
        start)
                f_message "Starting mjpg_streamer"
                $DAEMON/mjpg_streamer -b -i "$DAEMON/input_uvc.so" -o "$DAEMON/output_http.so -w $DAEMON/www -c $WC_USER:$WC_PASSWORD -p $WC_PORT"
                sleep 2
                f_message "mjpg_streamer started"
                ;;
        stop)
                f_message "Stopping mjpg_streamer…"
                killall mjpg_streamer
                f_message "mjpg_streamer stopped"
                ;;
        restart)
                f_message "Restarting daemon: mjpg_streamer"
                killall mjpg_streamer
                $DAEMON/mjpg_streamer -b -i "$DAEMON/input_uvc.so" -o "$DAEMON/output_http.so -w $DAEMON/www -c $WC_USER:$WC_PASSWORD -p $WC_PORT"
                sleep 2
                f_message "Restarted daemon: mjpg_streamer"
                ;;
        status)
                pid=`ps -A | grep mjpg_streamer | grep -v "grep" | grep -v mjpg_streamer. | awk '{print $1}' | head -n 1`
                if [ -n "$pid" ];
                then
                        f_message "mjpg_streamer is running with pid ${pid}"
                        f_message "mjpg_streamer was started with the following command line"
                        cat /proc/${pid}/cmdline ; echo ""
                else
                        f_message "Could not find mjpg_streamer running"
                fi
                ;;
        *)
                f_message "Usage: $0 {start|stop|status|restart}"
                exit 1
                ;;
esac
exit 0

默认登录的用户名是user，密码是password，端口是12345（可以在代码中第16，17，18行修改）。

赋予脚本执行权限

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$ sudo chmod +x /etc/init.d/webcam

配置脚本开机启动

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$ sudo update-rc.d webcam defaults

启动网络摄像头后台程序

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$ sudo /etc/init.d/webcam start

查看网络摄像头运行状态

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$ sudo /etc/init.d/webcam status

重启网络摄像头后台程序

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$ sudo /etc/init.d/webcam restart

停止网络摄像头后台程序

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$ sudo /etc/init.d/webcam stop

浏览器中查看网络摄像头

访问地址：http://树莓派的IP地址:自定义的端口号