diff --git a/ffmpeg.c b/ffmpeg.c index ad13f18e3f..c10b3c6a8c 100644 --- a/ffmpeg.c +++ b/ffmpeg.c @@ -2775,6 +2775,25 @@ static int process_input(int file_index) } if(!ist->wrap_correction_done && is->start_time != AV_NOPTS_VALUE && ist->st->pts_wrap_bits < 64){ + // Correcting starttime based on the enabled streams + // FIXME this ideally should be done before the first use of starttime but we do not know which are the enabled streams at that point. + // so we instead do it here as part of discontinuity handling + if ( ist->next_dts == AV_NOPTS_VALUE + && ifile->ts_offset == -is->start_time + && (is->iformat->flags & AVFMT_TS_DISCONT)) { + int64_t new_start_time = INT64_MAX; + for (i=0; inb_streams; i++) { + AVStream *st = is->streams[i]; + if(st->discard == AVDISCARD_ALL || st->start_time == AV_NOPTS_VALUE) + continue; + new_start_time = FFMIN(new_start_time, av_rescale_q(st->start_time, st->time_base, AV_TIME_BASE_Q)); + } + if (new_start_time > is->start_time) { + av_log(is, AV_LOG_VERBOSE, "Correcting start time by %"PRId64"\n", new_start_time - is->start_time); + ifile->ts_offset = -new_start_time; + } + } + int64_t stime = av_rescale_q(is->start_time, AV_TIME_BASE_Q, ist->st->time_base); int64_t stime2= stime + (1ULL<st->pts_wrap_bits); ist->wrap_correction_done = 1;