diff --git a/libavformat/avformat.h b/libavformat/avformat.h index b3c398e8d2..480df999e2 100644 --- a/libavformat/avformat.h +++ b/libavformat/avformat.h @@ -373,6 +373,11 @@ typedef struct AVFormatContext { int loop_input; /* decoding: size of data to probe; encoding unused */ unsigned int probesize; + + /** + * maximum duration in AV_TIME_BASE units over which the input should be analyzed in av_find_stream_info() + */ + int max_analyze_duration; } AVFormatContext; typedef struct AVPacketList { diff --git a/libavformat/utils.c b/libavformat/utils.c index 4467ddaca3..69b3cea628 100644 --- a/libavformat/utils.c +++ b/libavformat/utils.c @@ -329,6 +329,7 @@ static const AVOption options[]={ {"genpts", "generate pts", 0, FF_OPT_TYPE_CONST, AVFMT_FLAG_GENPTS, INT_MIN, INT_MAX, D, "fflags"}, {"track", " set the track number", OFFSET(track), FF_OPT_TYPE_INT, DEFAULT, 0, INT_MAX, E}, {"year", "set the year", OFFSET(year), FF_OPT_TYPE_INT, DEFAULT, INT_MIN, INT_MAX, E}, +{"analyzeduration", NULL, OFFSET(max_analyze_duration), FF_OPT_TYPE_INT, 3*AV_TIME_BASE, 0, INT_MAX, D}, {NULL}, }; @@ -1757,9 +1758,6 @@ static int try_decode_frame(AVStream *st, const uint8_t *data, int size) /* absolute maximum size we read until we abort */ #define MAX_READ_SIZE 5000000 -/* maximum duration until we stop analysing the stream */ -#define MAX_STREAM_DURATION ((int)(AV_TIME_BASE * 3.0)) - #define MAX_STD_TIMEBASES (60*12+5) static int get_std_framerate(int i){ if(i<60*12) return i*1001; @@ -1942,7 +1940,7 @@ int av_find_stream_info(AVFormatContext *ic) (st->codec->codec_id == CODEC_ID_MPEG4 && !st->need_parsing))*/) try_decode_frame(st, pkt->data, pkt->size); - if (av_rescale_q(st->codec_info_duration, st->time_base, AV_TIME_BASE_Q) >= MAX_STREAM_DURATION) { + if (av_rescale_q(st->codec_info_duration, st->time_base, AV_TIME_BASE_Q) >= ic->max_analyze_duration) { break; } count++;