ffmpeg-mmap-fallback.patch

   1 Index: libavformat/grab.c
   2 ===================================================================
   3 --- libavformat/grab.c  (revision 7378)
   4 +++ libavformat/grab.c  (working copy)
   5 @@ -219,8 +219,11 @@ static int grab_read_header(AVFormatCont
   6      } else {
   7          s->video_buf = mmap(0,s->gb_buffers.size,PROT_READ|PROT_WRITE,MAP_SHARED,video_fd,0);
   8          if ((unsigned char*)-1 == s->video_buf) {
   9 -            perror("mmap");
  10 -            goto fail;
  11 +            s->video_buf = mmap(0,s->gb_buffers.size,PROT_READ|PROT_WRITE,MAP_PRIVATE,video_fd,0);
  12 +            if ((unsigned char*)-1 == s->video_buf) {
  13 +                perror("mmap");
  14 +                goto fail;
  15 +            }
  16          }
  17          s->gb_frame = 0;
  18          s->time_frame = av_gettime() * s->frame_rate / s->frame_rate_base;