Synched gist at Sat Jun 1 12:42:54 PDT 2024

mlt-isolate

@@ -0,0 +1,31 @@
+#!/bin/sh
+
+strip_track()
+{
+
+	xmlstarlet ed -d "//mlt/playlist[@id='playlist"$2"']" "$1" > /tmp/out.mlt
+	sed -i '/playlist'$2'/d' /tmp/out.mlt
+	cp /tmp/out.mlt /tmp/input.mlt
+
+}
+
+INPUT_FILE="$1"
+TRACK_TO_KEEP="$2"
+MAX_TRACKS="$3"
+
+# copy it for safe keeping.
+cp "$1" /tmp/input.mlt
+
+COUNTER=0
+for OUTPUT in $(seq $MAX_TRACKS)
+do
+	if [ ! $COUNTER = $TRACK_TO_KEEP ]
+	then
+		strip_track /tmp/input.mlt $COUNTER
+	fi
+	let COUNTER++
+done
+
+sed -i 's/playlist'$TRACK_TO_KEEP'/playlist0/g' /tmp/out.mlt
+
+cp /tmp/out.mlt "$1.isolated.mlt"