@@ -24,6 +24,7 @@

  */

 #include <assert.h>

+#include "avutil.h"

 #include "common.h"

 #include "mathematics.h"

@@ -54,6 +55,12 @@ int64_t av_gcd(int64_t a, int64_t b){

     else  return a;

 }

+#if LIBAVUTIL_VERSION_MAJOR < 50

+int64_t ff_gcd(int64_t a, int64_t b){

+    return av_gcd(a, b);

+}

+#endif

+

 int64_t av_rescale_rnd(int64_t a, int64_t b, int64_t c, enum AVRounding rnd){

     int64_t r=0;

     assert(c > 0);