--- /dev/null
+From c57e5b8154f5fe1457f4c64e04885a2cdfb37f51 Mon Sep 17 00:00:00 2001
+From: Joakim Plate <elupus@ecce.se>
+Date: Sat, 22 Oct 2011 19:01:38 +0200
+Subject: [PATCH 08/13] Get stream durations using read_timestamp
+
+Patch part of the XBMC patch set for ffmpeg, downloaded from
+https://github.com/xbmc/FFmpeg/.
+
+Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
+Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
+---
+ libavformat/utils.c | 39 +++++++++++++++++++++++++++++++++++++++
+ 1 file changed, 39 insertions(+)
+
+diff --git a/libavformat/utils.c b/libavformat/utils.c
+index 3e8af50..f4fb172 100644
+--- a/libavformat/utils.c
++++ b/libavformat/utils.c
+@@ -2356,6 +2356,41 @@ static void estimate_timings_from_bit_rate(AVFormatContext *ic)
+ #define DURATION_MAX_READ_SIZE 250000LL
+ #define DURATION_MAX_RETRY 4
+
++static void av_estimate_timings_from_pts2(AVFormatContext *ic, int64_t old_offset)
++{
++ AVStream *st;
++ int i, step= 1024;
++ int64_t ts, pos;
++
++ for(i=0;i<ic->nb_streams;i++) {
++ st = ic->streams[i];
++
++ pos = 0;
++ ts = ic->iformat->read_timestamp(ic, i, &pos, DURATION_MAX_READ_SIZE);
++ if (ts == AV_NOPTS_VALUE)
++ continue;
++ if (st->start_time > ts || st->start_time == AV_NOPTS_VALUE)
++ st->start_time = ts;
++
++ pos = avio_size(ic->pb) - 1;
++ do {
++ pos -= step;
++ ts = ic->iformat->read_timestamp(ic, i, &pos, pos + step);
++ step += step;
++ } while (ts == AV_NOPTS_VALUE && pos >= step && step < DURATION_MAX_READ_SIZE);
++
++ if (ts == AV_NOPTS_VALUE)
++ continue;
++
++ if (st->duration < ts - st->start_time || st->duration == AV_NOPTS_VALUE)
++ st->duration = ts - st->start_time;
++ }
++
++ fill_all_stream_timings(ic);
++
++ avio_seek(ic->pb, old_offset, SEEK_SET);
++}
++
+ /* only usable for MPEG-PS streams */
+ static void estimate_timings_from_pts(AVFormatContext *ic, int64_t old_offset)
+ {
+@@ -2506,6 +2541,10 @@ static void estimate_timings(AVFormatContext *ic, int64_t old_offset)
+ * the components */
+ fill_all_stream_timings(ic);
+ ic->duration_estimation_method = AVFMT_DURATION_FROM_STREAM;
++ } else if (ic->iformat->read_timestamp &&
++ file_size && ic->pb->seekable) {
++ /* get accurate estimate from the PTSes */
++ av_estimate_timings_from_pts2(ic, old_offset);
+ } else {
+ /* less precise: use bitrate info */
+ estimate_timings_from_bit_rate(ic);
+--
+2.1.0
+