diff --git a/tools/video_concat b/tools/video_concat
new file mode 100755
index 0000000..5cac282
--- /dev/null
+++ b/tools/video_concat
@@ -0,0 +1,16 @@
+#!/bin/bash
+
+# should be run through output pipe, exit otherwise
+[ -t 1 ] && echo "ERROR: should declare output as a pipe, ie > output.mp4" && exit -1
+
+# detect current dir
+DIR=$(pwd)
+
+# build temporary file which contains all the files to append 
+tempfile=$(mktemp)
+for i in $@; do
+	echo file $DIR/$i >> $tempfile
+done
+
+# output as matroska file
+ffmpeg -safe 0 -f concat -i $tempfile -c copy -f matroska -