int nb_segments, segments_size, segment_index;
Segment **segments;
int64_t first_pts, start_pts, max_pts;
+ int64_t last_dts;
int bit_rate;
char bandwidth_str[64];
set_codec_str(s, st->codec, os->codec_str, sizeof(os->codec_str));
os->first_pts = AV_NOPTS_VALUE;
os->max_pts = AV_NOPTS_VALUE;
+ os->last_dts = AV_NOPTS_VALUE;
os->segment_index = 1;
}
if (ret < 0)
return ret;
+ // Fill in a heuristic guess of the packet duration, if none is available.
+ // The mp4 muxer will do something similar (for the last packet in a fragment)
+ // if nothing is set (setting it for the other packets doesn't hurt).
+ // By setting a nonzero duration here, we can be sure that the mp4 muxer won't
+ // invoke its heuristic (this doesn't have to be identical to that algorithm),
+ // so that we know the exact timestamps of fragments.
+ if (!pkt->duration && os->last_dts != AV_NOPTS_VALUE)
+ pkt->duration = pkt->dts - os->last_dts;
+ os->last_dts = pkt->dts;
+
// If forcing the stream to start at 0, the mp4 muxer will set the start
// timestamps to 0. Do the same here, to avoid mismatches in duration/timestamps.
if (os->first_pts == AV_NOPTS_VALUE &&