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avformat/dashdec: refine compute current fragment for presentation_timeoffset mode

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fix ticket id: #7369 #7382.
use ((wallclock - availability_start_time) * timescale -presentation_timeoffset) / duration

Signed-off-by: Steven Liu <lq@onvideo.cn>
This commit is contained in:
Steven Liu 2018-09-05 14:33:53 +08:00
parent d0be0de065
commit ad9b4ecc26
1 changed files with 1 additions and 1 deletions
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libavformat/dashdec.c
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@ -1341,7 +1341,7 @@ static int64_t calc_cur_seg_no(AVFormatContext *s, struct representation *pls)
} else if (pls->fragment_duration){
av_log(s, AV_LOG_TRACE, "in fragment_duration mode fragment_timescale = %"PRId64", presentation_timeoffset = %"PRId64"\n", pls->fragment_timescale, pls->presentation_timeoffset);
if (pls->presentation_timeoffset) {
num = pls->presentation_timeoffset * pls->fragment_timescale / pls->fragment_duration;
num = pls->first_seq_no + (((get_current_time_in_sec() - c->availability_start_time) * pls->fragment_timescale)-pls->presentation_timeoffset) / pls->fragment_duration;
} else if (c->publish_time > 0 && !c->availability_start_time) {
if (c->min_buffer_time) {
num = pls->first_seq_no + (((c->publish_time + pls->fragment_duration) - c->suggested_presentation_delay) * pls->fragment_timescale) / pls->fragment_duration - c->min_buffer_time;