Add quotes around paths in pp script

client/src/main/resources/pp.sh

@@ -16,13 +16,13 @@ TIME=$(date --date="@$5" +%d.%m.%Y_%H:%M)
 MP4=$(echo "$1/$4_$3_$TIME.mp4")
 
 # remux ts to mp4
-ffmpeg -i $2 -c:v copy -c:a copy -f mp4 $MP4
+ffmpeg -i "$2" -c:v copy -c:a copy -f mp4 "$MP4"
 
 # move mp4 to target directory
-mv $MP4 /tmp
+mv "$MP4" /tmp
 
 # delete the original .ts file
-rm $2
+rm "$2"
 
 # delete the directory of the recording
-rm -r $1
+rm -r "$1"