Set live wallpapers on linux.

live-wallpaper.sh

#!/bin/sh
# soystemd 2021-04-10 (https://github.com/soystemd)
# sets a video or gif as your wallpaper.
# requires mpv, xwinwrap and xrandr.
# to kill the live wallpaper, just run this with no arguments.
#
# example:
#   $ live video.mp4
#
# for killing:
#   $ live

# config
script_name='live'
mpv_args='
--fullscreen
--loop-file
--no-audio
--sid=no
--no-osc
--no-osd-bar
--no-input-default-bindings
--no-stop-screensaver
--load-scripts=no
--no-terminal
-wid WID
'

main ()
{
    wallpaper="$1"
    kill_other_instances
    set_wallpaper_all_displays "$wallpaper"
    wait
}

kill_other_instances ()
{
    [ -n "$wallpaper" ] && error_checks
    pkill -x --older 1 --signal USR1 "$script_name"
    [ -z "$wallpaper" ] && exit
    trap exit USR1
    trap 'kill -- -$$' EXIT HUP
}

set_wallpaper_all_displays ()
{
    local wallpaper="$1"
    for display_geometry in $(get_display_geometries); do
        set_wallpaper "$display_geometry" "$wallpaper" &
    done
}

set_wallpaper ()
{
    local display_geometry="$1"
    local wallpaper="$2"
    xwinwrap -ov -ni -g "$display_geometry" -- \
        mpv $(mpv_args) "$wallpaper" >/dev/null 2>&1
}

get_display_geometries ()
{
    xrandr -q | grep ' connected' |
        grep --only-matching --perl-regexp '\d+x\d+\+\d+\+\d+'
}

error_checks ()
{
    [ ! -r "$wallpaper" ] &&
        echo bad file given >&2 &&
        exit 1

    [ -z "$DISPLAY" ] &&
        echo no display >&2 &&
        exit 1
}

mpv_wid ()
{
    wid="$1"
    shift
    mpv $(mpv_args) --wid="$wid" "$@"
}

mpv_args ()
{
    echo "$mpv_args" | tr '\n' ' '
}

main "$@"
exit