Index: VirtualBox-5.2.6/src/VBox/Main/src-client/WebMWriter.h
===================================================================
--- VirtualBox-5.2.6.orig/src/VBox/Main/src-client/WebMWriter.h
+++ VirtualBox-5.2.6/src/VBox/Main/src-client/WebMWriter.h
@@ -91,7 +91,7 @@ class WebMWriter : public EBMLWriter
 public:
 
     /** Defines a WebM timecode. */
-    typedef uint16_t WebMTimecode;
+    typedef uint32_t WebMTimecode;
 
     /** Defines the WebM block flags data type. */
     typedef uint8_t  WebMBlockFlags;