Add capture.sh

capture.sh

@@ -0,0 +1,16 @@
+#!/bin/bash
+
+if ! command -v slop >/dev/null; then
+    echo "capture: slop not found" >&2
+    exit 1
+fi
+
+out=${1:-$(date +%Y%m%d-%H%M%S).png}
+
+coords=$(slop -f "%x %y %w %h" 2>/dev/null) || exit 1
+read x y w h <<<"$coords"
+
+ffmpeg -f x11grab -loglevel error -s ${w}x${h} \
+    -i ${DISPLAY}+${x},${y} -frames:v 1 -y "$out"
+
+echo "$out"