Here is my own version from Chris' code:
#!/bin/bash
while sleep 55
do
players_list=$(gdbus call --session --dest org.freedesktop.DBus \
--object-path / --method org.freedesktop.DBus.ListNames | \
awk 'BEGIN { RS=","; } /org.mpris.MediaPlayer2./ { gsub(/[\[\]()\x27]/, ""); print $1; }')
for player in $players_list
do
state=$(gdbus call --session \
--dest $player \
--object-path /org/mpris/MediaPlayer2 \
--method org.freedesktop.DBus.Properties.Get \
"org.mpris.MediaPlayer2.Player" \
"PlaybackStatus")
fullscreen=$(gdbus call --session \
--dest $player \
--object-path /org/mpris/MediaPlayer2 \
--method org.freedesktop.DBus.Properties.Get \
"org.mpris.MediaPlayer2" \
"Fullscreen")
if [ "$state" = "(<'Playing'>,)" -a "$fullscreen" = "(<true>,)" ]
then
echo $player $state $fullscreen send signal
xscreensaver-command -deactivate
break
else
echo $player $state $fullscreen
fi
done
done
It checks at each iteration if the list of players has been changed.
It also deactivates the screensaver only if the player is fullscreen which is normally the case for video.
I just put this script in the autostart and don't bother anymore with xscreensaver while watching video.