On 01.07.2025 16:52, Ross Finlayson <[email protected]> wrote:
You are going to have to be *much* more specific, because right now your
question makes no sense at all. Exactly how are you using our software, and
what are you trying to do?
(Remember that our software includes RTSP servers, RTSP clients, proxy servers,
and demonstration applications.)
Ross Finlayson
Live Networks, Inc.
http://www.live555.com/
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My VideoSource is:
class VideoSource : public FramedSource
It has void VideoSource::doGetNextFrame(), where I prepare frame and send them.
Firstly I send SPS PPS at the start of the video.
After I find an I-frame:
ingest::MediaFrame cur_frame = frame_;
do
{
result = storage_manager_->GetPrevVideoFrame(frame_);
summ_duration += frame_.duration;
}
while (result == StorageResult::OK && !frame_.is_key);
if (result != StorageResult::OK)
{
nextTask() = envir().taskScheduler().scheduleDelayedTask(0,
(TaskFunc*)FramedSource::afterGetting, this);
return;
}
frame_.duration = summ_duration;
So, duration of this frame is a sum of the frames in the GOP.
After I find SPS, PPS:
ingest::MediaFrame sps, pps;
result = storage_manager_->GetPrevVideoFrame(pps);
pps.frame_time = frame_.frame_time;
if (result == StorageResult::OK)
next_frames_.insert(next_frames_.begin(), pps);
result = storage_manager_->GetPrevVideoFrame(sps);
sps.frame_time = frame_.frame_time;
if (result == StorageResult::OK)
next_frames_.insert(next_frames_.begin(), sps);
I set them the same frame time as I-frame.
Also I tried to insert empty I-frames between the real I-frames, but the issues
still present:
ingest::MediaFrame f = frame_;
f.raw_data.clear();
if (cur_frame.frame_time > frame_.frame_time)
{
int64_t t = cur_frame.frame_time - frame_.frame_time - 50;
int i = 1;
while (t > 50)
{
f.frame_time -= 50 * (i++);
next_frames_.insert(next_frames_.begin(), f);
//next_frames_.insert(next_frames_.begin(), pps);
//next_frames_.insert(next_frames_.begin(), sps);
t -= 50;
}
}
Also I prepare SEI. After in the next circle:
nextTask() = envir().taskScheduler().scheduleDelayedTask(0,
(TaskFunc*)FramedSource::afterGetting, this);
I send the frames in the next_frames_:
gettimeofday(&fPresentationTime, NULL);
constexpr uint32_t rtp_clock_rate = 90000;
uint64_t delta_time = std::abs((int64_t)frame_.frame_time -
(int64_t)first_frame_time_);
rtp_timestamp_ = start_rtp_timestamp_ + (delta_time * rtp_clock_rate) / 1000;
Here rtp_timestamp_ is calculated from frame time and is the same for this
group of the frames.
Let me know if you need more info.
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