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+#!/bin/bash
+
+EXTENSION=jpg
+
+for file in $(ls *.${EXTENSION}); do
+  echo convert $file $(basename -s $EXTENSION $file)webp
+  convert $file $(basename -s $EXTENSION $file)webp
+done
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--- a/themes/modern-es-de/theme.xml
+++ b/themes/modern-es-de/theme.xml
@@ -123,7 +123,7 @@
                 <pos>0 0.3</pos>
                 <size>1 0.4</size>
                 <type>horizontal</type>
-                <staticImage>./${artDirectory}/${system.theme}.jpg</staticImage>
+                <staticImage>./${artDirectory}/${system.theme}.webp</staticImage>
                 <itemScale>1</itemScale>
                 <itemVerticalAlignment>center</itemVerticalAlignment>
                 <unfocusedItemOpacity>1</unfocusedItemOpacity>