obv: create

.config/i3/config

@@ -105,7 +105,7 @@ bindsym $mod+space focus mode_toggle
 
 # take a screenshot
 bindsym --release $mod+s exec "scrot -l mode=edge -s -e 'curl -F\\"file=@$f\\" https://0x0.st/ | xclip -selection clipboard; mv $f ~/Pictures/scrot/'"
-bindsym --release $mod+z exec "scrot -l mode=edge -e 'mv $f ~/Pictures/scrot/'"
+bindsym $mod+z exec "scrot -l mode=edge -oF ~/screen.png"
 bindsym $mod+shift+s exec "scrot -l mode=edge -e 'curl -F\\"file=@$f\\" https://0x0.st/ | xclip -selection clipboard; mv $f ~/Pictures/scrot/'"
 
 #bindsym --release $mod+x exec "scrot -l mode=edge -s -e 'curl -F\\"file=@$f\\" https://xfnw.ttm.sh/u.php | xclip -selection clipboard; mv $f ~/Pictures/scrot/'"

bin/obv

@@ -0,0 +1,18 @@
+#!/bin/sh
+
+idiff() {
+	ffmpeg -i ~/screen.png -pattern_type glob -i 'i*.png' -filter_complex '[1]boxblur=1[m];[0][m]blend=all_mode=grainextract' o%03d.png
+}
+
+tile() {
+	montage -background black -geometry 683x -tile 2x o*.png m.png
+}
+
+mkdir -p ~/.cache/obv
+cd ~/.cache/obv
+
+while inotifywait -e close_write ~/screen.png
+do
+	idiff
+	tile
+done