common/av_log: show also build version for FFmpeg

common/av_log.c

@@ -32,6 +32,7 @@
 #include "osdep/threads.h"
 
 #include <libavutil/avutil.h>
+#include <libavutil/ffversion.h>
 #include <libavutil/log.h>
 #include <libavutil/version.h>
 
@@ -205,7 +206,11 @@ void check_library_versions(struct mp_log *log, int v)
         {"libswscale",    LIBSWSCALE_VERSION_INT,    swscale_version()},
     };
 
-    mp_msg(log, v, "FFmpeg version: %s\n", av_version_info());
+    const char *runtime_version = av_version_info();
+    mp_msg(log, v, "FFmpeg version: %s", FFMPEG_VERSION);
+    if (strcmp(runtime_version, FFMPEG_VERSION))
+        mp_msg(log, v, " (runtime %s)", runtime_version);
+    mp_msg(log, v, "\n");
     mp_msg(log, v, "FFmpeg library versions:\n");
 
     for (int n = 0; n < MP_ARRAY_SIZE(libs); n++) {