Y4M_LINE_MAX       76 libavformat/yuv4mpeg.c     n = snprintf(buf, Y4M_LINE_MAX, "%s W%d H%d F%d:%d I%c A%d:%d%s\n",
Y4M_LINE_MAX       96 libavformat/yuv4mpeg.c     char buf2[Y4M_LINE_MAX+1];