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When using wallclock timestamps, redo the calc and set video_first_dts

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Isaac Connor
2024-07-19 14:44:51 -04:00
parent 27fcad7d85
commit 76226ca69c
1 changed files with 11 additions and 3 deletions
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14
src/zm_videostore.cpp
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@@ -1288,9 +1288,17 @@ int VideoStore::writeVideoFramePacket(const std::shared_ptr<ZMPacket> zm_packet)
pkt_guard.acquire(opkt);
if (monitor->WallClockTimestamps()) {
Microseconds useconds = std::chrono::duration_cast<Microseconds>(
zm_packet->timestamp - SystemTimePoint(Microseconds(video_first_pts)));
opkt->pts = opkt->dts = av_rescale_q(useconds.count(), AV_TIME_BASE_Q, video_in_stream->time_base);
int64_t ts = static_cast<int64>(std::chrono::duration_cast<Microseconds>(zm_packet->timestamp.time_since_epoch()).count());
if (video_first_dts == AV_NOPTS_VALUE) {
Debug(2, "Starting video first_dts will become %" PRId64, ts);
video_first_dts = ts;
}
opkt->pts = opkt->dts = av_rescale_q(ts-video_first_dts, AV_TIME_BASE_Q, video_in_stream->time_base);
Debug(2, "dts from timestamp, set to (%" PRId64 ") secs(%.2f), minus first_dts %" PRId64 " = %" PRId64,
ts,
FPSeconds(zm_packet->timestamp.time_since_epoch()).count(),
video_first_dts, ts - video_first_dts);
} else if (ipkt->dts != AV_NOPTS_VALUE) {
if (video_first_dts == AV_NOPTS_VALUE) {
Debug(2, "Starting video first_dts will become %" PRId64, ipkt->dts);