ffmpeg update to june 23 version which fixes mp4 crash on still frames with 3...

source/patched-ffmpeg-mt/libavformat/utils.c

Index: source/patched-ffmpeg-mt/libavformat/utils.c
===================================================================
--- source/patched-ffmpeg-mt/libavformat/utils.c	(revision 50820)
+++ source/patched-ffmpeg-mt/libavformat/utils.c	(working copy)
@@ -283,9 +283,39 @@
     return NULL;
 }
 
-/* memory handling */
+#if LIBAVFORMAT_VERSION_MAJOR < 53 && CONFIG_SHARED && HAVE_SYMVER
+FF_SYMVER(void, av_destruct_packet_nofree, (AVPacket *pkt), "LIBAVFORMAT_52")
+{
+    av_destruct_packet_nofree(pkt);
+}
 
+FF_SYMVER(void, av_destruct_packet, (AVPacket *pkt), "LIBAVFORMAT_52")
+{
+    av_destruct_packet(pkt);
+}
 
+FF_SYMVER(int, av_new_packet, (AVPacket *pkt, int size), "LIBAVFORMAT_52")
+{
+    return av_new_packet(pkt, size);
+}
+
+FF_SYMVER(int, av_dup_packet, (AVPacket *pkt), "LIBAVFORMAT_52")
+{
+    return av_dup_packet(pkt);
+}
+
+FF_SYMVER(void, av_free_packet, (AVPacket *pkt), "LIBAVFORMAT_52")
+{
+    av_free_packet(pkt);
+}
+
+FF_SYMVER(void, av_init_packet, (AVPacket *pkt), "LIBAVFORMAT_52")
+{
+    av_log(NULL, AV_LOG_WARNING, "Diverting av_*_packet function calls to libavcodec. Recompile to improve performance\n");
+    av_init_packet(pkt);
+}
+#endif
+
 int av_get_packet(ByteIOContext *s, AVPacket *pkt, int size)
 {
     int ret= av_new_packet(pkt, size);
@@ -3576,7 +3606,7 @@
     str[0] = '\0';
     if (proto)
         av_strlcatf(str, size, "%s://", proto);
-    if (authorization)
+    if (authorization && authorization[0])
         av_strlcatf(str, size, "%s@", authorization);
 #if CONFIG_NETWORK && defined(AF_INET6)
     /* Determine if hostname is a numerical IPv6 address,