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

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

 /*
  * RTMP network protocol
  * Copyright (c) 2009 Kostya Shishkov
  *
  * 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 897 matching lines @@
         if (data_left >= size) {
             memcpy(buf, rt->flv_data + rt->flv_off, size);
             rt->flv_off += size;
             return orig_size;
         }
         if (data_left > 0) {
             memcpy(buf, rt->flv_data + rt->flv_off, data_left);
             buf  += data_left;
             size -= data_left;
             rt->flv_off = rt->flv_size;
+            return data_left;
         }
         if ((ret = get_packet(s, 0)) < 0)
            return ret;
     }
     return orig_size;
 }
 
 static int rtmp_write(URLContext *h, const uint8_t *buf, int size)
 {
     RTMPContext *rt = h->priv_data;
@@ skipping 61 matching lines @@
 }
 
 URLProtocol rtmp_protocol = {
     "rtmp",
     rtmp_open,
     rtmp_read,
     rtmp_write,
     NULL, /* seek */
     rtmp_close,
 };