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

source/patched-ffmpeg-mt/libavformat/internal.h

 /*
  * copyright (c) 2001 Fabrice Bellard
  *
  * This file is part of FFmpeg.
  *
  * FFmpeg is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
  * License as published by the Free Software Foundation; either
  * version 2.1 of the License, or (at your option) any later version.
  *
@@ skipping 113 matching lines @@
  *
  * Note, this requires networking to be initialized, so the caller must
  * ensure ff_network_init has been called.
  *
  * @see ff_url_split
  *
  * @param str the buffer to fill with the url
  * @param size the size of the str buffer
  * @param proto the protocol identifier, if null, the separator
  *              after the identifier is left out, too
- * @param authorization an optional authorization string, may be null
+ * @param authorization an optional authorization string, may be null.
+ *                      An empty string is treated the same as a null string.
  * @param hostname the host name string
  * @param port the port number, left out from the string if negative
  * @param fmt a generic format string for everything to add after the
  *            host/port, may be null
  * @return the number of characters written to the destination buffer
  */
 int ff_url_join(char *str, int size, const char *proto,
                 const char *authorization, const char *hostname,
                 int port, const char *fmt, ...);
 
@@ skipping 22 matching lines @@
  * @param dst the muxer to write the packet to
  * @param dst_stream the stream index within dst to write the packet to
  * @param pkt the packet to be written
  * @param src the muxer the packet originally was intended for
  * @return the value av_write_frame returned
  */
 int ff_write_chained(AVFormatContext *dst, int dst_stream, AVPacket *pkt,
                      AVFormatContext *src);
 
 #endif /* AVFORMAT_INTERNAL_H */