Update Windows ffmpeg to 3.2.4

Externals/ffmpeg/include/libavutil/version.h

@@ -18,6 +18,12 @@
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
+/**
+ * @file
+ * @ingroup lavu
+ * Libavutil version macros
+ */
+
 #ifndef AVUTIL_VERSION_H
 #define AVUTIL_VERSION_H
 
@@ -29,6 +35,21 @@
  * Useful to check and match library version in order to maintain
  * backward compatibility.
  *
+ * The FFmpeg libraries follow a versioning sheme very similar to
+ * Semantic Versioning (http://semver.org/)
+ * The difference is that the component called PATCH is called MICRO in FFmpeg
+ * and its value is reset to 100 instead of 0 to keep it above or equal to 100.
+ * Also we do not increase MICRO for every bugfix or change in git master.
+ *
+ * Prior to FFmpeg 3.2 point releases did not change any lib version number to
+ * avoid aliassing different git master checkouts.
+ * Starting with FFmpeg 3.2, the released library versions will occupy
+ * a separate MAJOR.MINOR that is not used on the master development branch.
+ * That is if we branch a release of master 55.10.123 we will bump to 55.11.100
+ * for the release and master will continue at 55.12.100 after it. Each new
+ * point release will then bump the MICRO improving the usefulness of the lib
+ * versions.
+ *
  * @{
  */
 
@@ -48,12 +69,6 @@
  * @}
  */
 
-/**
- * @file
- * @ingroup lavu
- * Libavutil version macros
- */
-
 /**
  * @defgroup lavu_ver Version and Build diagnostics
  *
@@ -64,8 +79,8 @@
  */
 
 #define LIBAVUTIL_VERSION_MAJOR  55
-#define LIBAVUTIL_VERSION_MINOR  12
-#define LIBAVUTIL_VERSION_MICRO 100
+#define LIBAVUTIL_VERSION_MINOR  34
+#define LIBAVUTIL_VERSION_MICRO 101
 
 #define LIBAVUTIL_VERSION_INT   AV_VERSION_INT(LIBAVUTIL_VERSION_MAJOR, \
                                                LIBAVUTIL_VERSION_MINOR, \
@@ -78,9 +93,7 @@
 #define LIBAVUTIL_IDENT         "Lavu" AV_STRINGIFY(LIBAVUTIL_VERSION)
 
 /**
- * @}
- *
- * @defgroup depr_guards Deprecation guards
+ * @defgroup lavu_depr_guards Deprecation Guards
  * FF_API_* defines may be placed below to indicate public API that will be
  * dropped at a future version bump. The defines themselves are not part of
  * the public API and may change, break or disappear at any time.
@@ -119,11 +132,14 @@
 #ifndef FF_API_CRC_BIG_TABLE
 #define FF_API_CRC_BIG_TABLE            (LIBAVUTIL_VERSION_MAJOR < 56)
 #endif
+#ifndef FF_API_PKT_PTS
+#define FF_API_PKT_PTS                  (LIBAVUTIL_VERSION_MAJOR < 56)
+#endif
 
 
 /**
+ * @}
  * @}
  */
 
 #endif /* AVUTIL_VERSION_H */
-