Raspberry Pi Picture Frame

camicons.sh

#!/bin/bash

cd /usr/share/icons

# Microseven MYM7 1080i-A etc
wget -O cam1.jpg 'http://192.168.0.2/tmpfs/snap.jpg?usr=username&pwd=password&1562769315776'
wget -O cam2.jpg 'http://192.168.0.3/tmpfs/snap.jpg?usr=username&pwd=password&1562769315776'
wget -O cam3.jpg 'http://192.168.0.4/tmpfs/snap.jpg?usr=username&pwd=password&1562769315776'
# foscam 9821 v2
wget -O cam4.jpg 'http://192.168.0.5/cgi-bin/CGIProxy.fcgi?cmd%3DsnapPicture2%26usr%3Dsuername%26pwd%3Dpassword'

foscam4.desktop

[Desktop Entry]
Name=Foscam 9821 Cam4
Comment=Foscam
Icon=/usr/share/icons/cam4.jpg
Exec=/usr/bin/cvlc --zoom=0.62  rtsp://username:password@192.168.0.5:443/videoMain
Type=Application
Encoding=UTF-8
Terminal=false
Categories=None;

microseven1.desktop

[Desktop Entry]
Name=Microseven Cam1
Comment=Microseven Cam1
Icon=/usr/share/icons/cam1.jpg
Exec=/usr/bin/gst-launch-1.0 playbin uri=rtsp://username:password@192.168.0.2/11 uridecodebin0::source::latency=0
Type=Application
Encoding=UTF-8
Terminal=false
Categories=None;

pictureframe.desktop

[Desktop Entry]
Type=Application
Name=Slideshow
Exec=sh -c '/bin/bash /home/pi/pictureframe.sh'

pictureframe.sh

#!/bin/bash
finish()
{
	pkill -9 $PPID
}
trap finish EXIT TERM INT

export DISPLAY=:0.0
export XAUTHORITY=/home/pi/.Xauthority

echo '"pkill -n feh"' > /dev/shm/xbindkeys.feh
echo "b:1" >> /dev/shm/xbindkeys.feh

# enumerate all the attached screens
displays=""
while read id
do
    displays="$displays $id"
done< <(xvinfo | sed -n 's/^screen #\([0-9]\+\)$/\1/p')

delay=$1

checkFullscreen()
{

    # loop through every display looking for a fullscreen window
    for display in $displays
    do
        #get id of active window and clean output
        activ_win_id=`DISPLAY=:0.${display} xprop -root _NET_ACTIVE_WINDOW`
        activ_win_id=${activ_win_id:40:9}

        # Check if Active Window (the foremost window) is in fullscreen state
        isActivWinFullscreen=`DISPLAY=:0.${display} xprop -id $activ_win_id | grep _NET_WM_STATE_FULLSCREEN`
            if [[ "$isActivWinFullscreen" != *NET_WM_STATE_FULLSCREEN* ]];then
		xbindkeys -n -f /dev/shm/xbindkeys.feh &
		xbk_pid=$!

		feh -V -x -F -Y -Z -z -A slideshow --reload 600 -r /home/pi/Pictures -D 7

		kill -9 $xbk_pid > /dev/null
		# kills apps that shouldnt be long running, e.g., a security cam feed that should close v. continuing to run
		# killall gst-launch-1.0 cvlc vlc 2>&1 > /dev/null
		#
		# updates cam icons and viola the icons update on the desktop too
		/home/pi/camicons.sh 2>&1 >/dev/null
            fi
    done
}

# If argument empty, use 60 seconds as default.
if [ -z "$1" ];then
    delay=60
fi

# If argument is not integer quit.
if [[ $1 = *[^0-9]* ]]; then
    echo "The Argument \"$1\" is not valid, not an integer"
    exit 1
fi

IDLE_TIME=$(($delay*1000))

while sleep $((1)); do
    idle=$(xprintidle)
    if [ $idle -ge $IDLE_TIME ]; then
        checkFullscreen
    fi
done

rm /dev/shm/xbindkeys.feh

The idea here is to create a centra console to monitor my security cameras, alarm system, and home automation system from a Raspberry Pi. All we need is a few simple scripts and desktop entries.

The pictureframe.sh script uses feh in a loop and binds the mouse button to kill feh. This is useful for touchscreens where you want the slideshow to exit when you touch the screen then resume automatically later. It checks to see how long X has been idle and starts after a configurable delay. The X code I found somewhere else (thanks to whoever did it!)

As written, put the desktop file in /home/pi/.config/autostart and pictureframe.sh in /home/pi and images in /home/pi/Pictures

The desktop files:

1. One per camera.
2. Execute a command that opens the cameras feed. Note that the Foscam one required VLC and the Microseven cams worked just fine with gstreamer.
3. The picture frame script kills the VLC and gstreamer processes when the “screensaver” starts.
4. The icons are updated by camicons.sh so the icons on the desktop reflect recent still snapshots from the cams.

Other things I added are desktop entries for my home automation system’s webpage and my alarm system’s webpage.