diff --git a/img/cinema-4k/screenshots-lcd/convert-cinema-4k-screenshots b/img/cinema-4k/screenshots-lcd/convert-cinema-4k-screenshots
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+++ b/img/cinema-4k/screenshots-lcd/convert-cinema-4k-screenshots
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+#!/bin/bash
+# convert-cinema-4k-screenshots
+#
+# GPLv3+
+# Copyright (C) 2023, Jeff Moe
+#
+# Converts and crops a set of screenshot photos of
+# the Blackmagic Cinema 4k LCD, taken with Canon.
+#
+# Requires packages:
+# graphicsmagick graphicsmagick-imagemagick-compat
+
+rm tmp.jpg
+
+for i in cinema-4k-ss-*.jpg
+do echo $i
+	convert								\
+	-geometry '1920>x1920>'						\
+	-chop 248x136							\
+	-gravity SouthEast						\
+	-chop 332x148							\
+	$i								\
+	tmp.jpg
+	mv tmp.jpg $i
+done