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

source/patched-ffmpeg-mt/libavfilter/vsrc_buffer.c

 /*
  * Memory buffer source filter
  * Copyright (c) 2008 Vitor Sessak
  *
  * 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.
  *
  * FFmpeg is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Lesser General Public License for more details.
  *
  * You should have received a copy of the GNU Lesser General Public
  * License along with FFmpeg; if not, write to the Free Software
  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 
 #include "avfilter.h"
 #include "vsrc_buffer.h"
 
 typedef struct {
     int64_t           pts;
     AVFrame           frame;
     int               has_frame;
-    int               h, w, pix_fmt;
+    int               h, w;
+    enum PixelFormat  pix_fmt;
     AVRational        pixel_aspect;
 } BufferSourceContext;
 
 
 int av_vsrc_buffer_add_frame(AVFilterContext *buffer_filter, AVFrame *frame,
                              int64_t pts, AVRational pixel_aspect)
 {
     BufferSourceContext *c = buffer_filter->priv;
 
     if (c->has_frame) {
@@ skipping 95 matching lines @@
     .init      = init,
 
     .inputs    = (AVFilterPad[]) {{ .name = NULL }},
     .outputs   = (AVFilterPad[]) {{ .name            = "default",
                                     .type            = AVMEDIA_TYPE_VIDEO,
                                     .request_frame   = request_frame,
                                     .poll_frame      = poll_frame,
                                     .config_props    = config_props, },
                                   { .name = NULL}},
 };