diff --git a/codec/mjpeg/jpeg.go b/codec/mjpeg/jpeg.go
new file mode 100644
index 00000000..da878d83
--- /dev/null
+++ b/codec/mjpeg/jpeg.go
@@ -0,0 +1,36 @@
+/*
+DESCRIPTION
+  jpeg.go contains constants, structure and functions specific to the JPEG.
+
+AUTHOR
+  Saxon Nelson-Milton <saxon@ausocean.org>
+
+LICENSE
+  Copyright (C) 2017 the Australian Ocean Lab (AusOcean)
+
+  It is free software: you can redistribute it and/or modify them
+  under the terms of the GNU General Public License as published by the
+  Free Software Foundation, either version 3 of the License, or (at your
+  option) any later version.
+
+  It is distributed in the hope that it will be useful, but WITHOUT
+  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+  FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+  for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with revid in gpl.txt. If not, see http://www.gnu.org/licenses.
+*/
+
+package mjpeg
+
+// JPEG marker codes.
+const (
+	soi  = 0xd8 // Start of image.
+	dri  = 0xdd // Define restart interval.
+	dqt  = 0xdb // Define quantization tables.
+	dht  = 0xde // Define hierarchical progression.
+	sos  = 0xda // Start of scan.
+	app0 = 0xe0 // TODO: find out what this is.
+	sof0 = 0xc0 // Baseline
+)