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

source/patched-ffmpeg-mt/libavcodec/libvorbis.c

 /*
  * copyright (c) 2002 Mark Hills <mark@pogo.org.uk>
  *
  * 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 174 matching lines @@
     if(context->buffer_index){
         ogg_packet *op2= (ogg_packet*)context->buffer;
         op2->packet = context->buffer + sizeof(ogg_packet);
 
         l=  op2->bytes;
         avccontext->coded_frame->pts= av_rescale_q(op2->granulepos, (AVRational){1, avccontext->sample_rate}, avccontext->time_base);
         //FIXME we should reorder the user supplied pts and not assume that they are spaced by 1/sample_rate
 
         memcpy(packets, op2->packet, l);
         context->buffer_index -= l + sizeof(ogg_packet);
-        memcpy(context->buffer, context->buffer + l + sizeof(ogg_packet), context->buffer_index);
+        memmove(context->buffer, context->buffer + l + sizeof(ogg_packet), context->buffer_index);
 //        av_log(avccontext, AV_LOG_DEBUG, "E%d\n", l);
     }
 
     return l;
 }
 
 
 static av_cold int oggvorbis_encode_close(AVCodecContext *avccontext) {
     OggVorbisContext *context = avccontext->priv_data ;
 /*  ogg_packet op ; */
@@ skipping 16 matching lines @@
     AVMEDIA_TYPE_AUDIO,
     CODEC_ID_VORBIS,
     sizeof(OggVorbisContext),
     oggvorbis_encode_init,
     oggvorbis_encode_frame,
     oggvorbis_encode_close,
     .capabilities= CODEC_CAP_DELAY,
     .sample_fmts = (const enum SampleFormat[]){SAMPLE_FMT_S16,SAMPLE_FMT_NONE},
     .long_name= NULL_IF_CONFIG_SMALL("libvorbis Vorbis"),
 } ;