[FFmpeg-cvslog] dashenc: Write segment timelines properly if the timeline has gaps

[Martin Storsjö]

ffmpeg | branch: master | Martin Storsjö <martin at martin.st> | Fri Nov 28 10:40:05 2014 +0200| [2f628d5943c12389c07d652d23d3916997f9f0f6] | committer: Martin Storsjö

dashenc: Write segment timelines properly if the timeline has gaps

Write a new start time if the duration of the previous segment
didn't match the start of the next one. Check that segments
actually are continuous before writing a repeat count.

This makes sure timestamps deduced from the timeline actually
match the real start timestamp as written in filenames (if
using a template containing $Time$).

Signed-off-by: Martin Storsjö <martin at martin.st>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=2f628d5943c12389c07d652d23d3916997f9f0f6
---

 libavformat/dashenc.c |    8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/libavformat/dashenc.c b/libavformat/dashenc.c
index 3308c05..a55cd67 100644
--- a/libavformat/dashenc.c
+++ b/libavformat/dashenc.c
@@ -208,20 +208,24 @@ static void output_segment_list(OutputStream *os, AVIOContext *out, DASHContext
             avio_printf(out, "duration=\"%"PRId64"\" ", c->last_duration);
         avio_printf(out, "initialization=\"%s\" media=\"%s\" startNumber=\"%d\">\n", c->init_seg_name, c->media_seg_name, c->use_timeline ? start_number : 1);
         if (c->use_timeline) {
+            int64_t cur_time = 0;
             avio_printf(out, "\t\t\t\t\t<SegmentTimeline>\n");
             for (i = start_index; i < os->nb_segments; ) {
                 Segment *seg = os->segments[i];
                 int repeat = 0;
                 avio_printf(out, "\t\t\t\t\t\t<S ");
-                if (i == start_index)
+                if (i == start_index || seg->time != cur_time)
                     avio_printf(out, "t=\"%"PRId64"\" ", seg->time);
                 avio_printf(out, "d=\"%d\" ", seg->duration);
-                while (i + repeat + 1 < os->nb_segments && os->segments[i + repeat + 1]->duration == seg->duration)
+                while (i + repeat + 1 < os->nb_segments &&
+                       os->segments[i + repeat + 1]->duration == seg->duration &&
+                       os->segments[i + repeat + 1]->time == os->segments[i + repeat]->time + os->segments[i + repeat]->duration)
                     repeat++;
                 if (repeat > 0)
                     avio_printf(out, "r=\"%d\" ", repeat);
                 avio_printf(out, "/>\n");
                 i += 1 + repeat;
+                cur_time += (1 + repeat) * seg->duration;
             }
             avio_printf(out, "\t\t\t\t\t</SegmentTimeline>\n");
         }