Add an AVOption max_delay for AVFormatContext->max_delay

This can currently also be set via -muxdelay in ffmpeg for muxers,
but not for demuxers (nor for demuxers in ffplay) - this patch
allows it to be set in all those cases.

Originally committed as revision 25180 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavformat/options.c

@@ -60,6 +60,7 @@ static const AVOption options[]={
 {"rtbufsize", "max memory used for buffering real-time frames", OFFSET(max_picture_buffer), FF_OPT_TYPE_INT, 3041280, 0, INT_MAX, D}, /* defaults to 1s of 15fps 352x288 YUYV422 video */
 {"fdebug", "print specific debug info", OFFSET(debug), FF_OPT_TYPE_FLAGS, DEFAULT, 0, INT_MAX, E|D, "fdebug"},
 {"ts", NULL, 0, FF_OPT_TYPE_CONST, FF_FDEBUG_TS, INT_MIN, INT_MAX, E|D, "fdebug"},
+{"max_delay", "maximum muxing or demuxing delay in microseconds", OFFSET(max_delay), FF_OPT_TYPE_INT, DEFAULT, 0, INT_MAX, E|D},
 {NULL},
 };