diff --git a/.gitignore b/.gitignore
index 85a6baa..653fd42 100644
--- a/.gitignore
+++ b/.gitignore
@@ -32,3 +32,6 @@ Makefile*
 #QtCtreator Qml
 *.qmlproject.user
 *.qmlproject.user.*
+
+# documentation
+/doc
diff --git a/mp4/mpeg4descriptor.cpp b/mp4/mpeg4descriptor.cpp
new file mode 100644
index 0000000..353dd9c
--- /dev/null
+++ b/mp4/mpeg4descriptor.cpp
@@ -0,0 +1,7 @@
+#include "mpeg4streamdescriptor.h"
+
+Mpeg4StreamDescriptor::Mpeg4StreamDescriptor()
+{
+
+}
+
diff --git a/mp4/mpeg4descriptor.h b/mp4/mpeg4descriptor.h
new file mode 100644
index 0000000..3cf1958
--- /dev/null
+++ b/mp4/mpeg4descriptor.h
@@ -0,0 +1,11 @@
+#ifndef MPEG4STREAMDESCRIPTOR_H
+#define MPEG4STREAMDESCRIPTOR_H
+
+
+class Mpeg4StreamDescriptor
+{
+public:
+    Mpeg4StreamDescriptor();
+};
+
+#endif // MPEG4STREAMDESCRIPTOR_H