Script to watch a movie on a Manjaro KDE wallpaper over the course of a month

KSlowMoviePlayer

#!/bin/bash
if [ -f "$1" ]
then
export DISPLAY=:0
export DBUS_SESSION_BUS_ADDRESS=unix:path=/run/user/$(id -u)/bus
Duration=$(mediainfo --Inform="Video;%Duration%" "$1")
Now=$(date +%s)
BOM=$(date -d "$(date +"%Y-%m-01")" +%s)
EOM=$(date -d "$(date +"%Y-%m-01") + 1 month - 1 second" +%s)
Seek=$(echo "scale=2; $Duration*($Now-$BOM)/($EOM-$BOM)/1000" | bc)
mkdir -p /tmp/KSlowMoviePlayer
find /tmp/KSlowMoviePlayer/ -maxdepth 1 -type f -name '*.jpg' -delete
ImageFile=/tmp/KSlowMoviePlayer/$Now.jpg

if [ -f "$1.srt" ]
then
  ffmpeg -loglevel panic -ss $Seek -copyts -i "$1" -vf subtitles="$1.srt" -frames:v 1 -c:v mjpeg -q:v 2 -y $ImageFile
else
  ffmpeg -loglevel panic -ss $Seek -i "$1" -frames:v 1 -c:v mjpeg -q:v 2 -y $ImageFile
fi

wallpaper_set_script="var allDesktops = desktops();
  print (allDesktops)
  for (i=0;i<allDesktops.length;i++)
  {
    d = allDesktops[i];
    d.wallpaperPlugin = 'org.kde.image';
    d.currentConfigGroup = Array('Wallpaper', 'org.kde.image', 'General');
    d.writeConfig('Image', 'file://$ImageFile')
  }"

qdbus org.kde.plasmashell /PlasmaShell org.kde.PlasmaShell.evaluateScript "${wallpaper_set_script}"

# Line below changes lockscreen image too
kwriteconfig5 --file kscreenlockerrc --group Greeter --group Wallpaper --group org.kde.image --group General --key Image "file://$ImageFile"

fi

Create a user cron job with crontab -e, call this script every minute.
* * * * * KSlowMoviePlayer ~/Videos/Wallpaper/*
I call it like this so I can put a different movie in the folder any time.

Dependencies: ffmpeg, bc
Only works in KDE, and distros other than Arch/Manjaro may need to alter the DBUS_SESSION_BUS_ADDRESS line.