Video stream delay - Urgent

[Itk]

Hi All,

I'm using GStreamer 1.8.3 for streaming video from Hikvision IP camera
through RTSP.
My pipe is as follows:
"rtspsrc location=%s protocols=%s user-agent=%s ! rtph264depay ! avdec_h264
! videoscale ! videorate drop-only=1 ! video/x-raw,framerate=%d/1 !
videoconvert ! appsink name=%s"

** %s - initialized with relevant strings...

I've noticed that there is a delay of ~1 seconds per 24 hours (I compared
the GStreamer's video to the live video of the camera web page), after few
days, the delay is quite significant.

Can you please advise how to overcome this issue. (ntp-sync? or something
else)

I've tried to pull video from another camera (Axis), and it works well with
quite constant delay (~2-3 seconds) for 10 days.

Thanks in advance,
Itk




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[Olivier Crête-3]

Hi,

You may want to set buffer-mode=slave on rtspsrc, in case the auto
doesn't realize that it's a live stream for some reason. In theory,
GStreamer should adapt to the sender clock and the delay should be
constant. But it's also possible you hitting a bug somewhere and since
it takes so long to reproduce, it would be long to fix...

Olivier


On Tue, 2018-08-28 at 07:52 -0500, Itk wrote:

> Hi All,
>
> I'm using GStreamer 1.8.3 for streaming video from Hikvision IP
> camera
> through RTSP.
> My pipe is as follows:
> "rtspsrc location=%s protocols=%s user-agent=%s ! rtph264depay !
> avdec_h264
> ! videoscale ! videorate drop-only=1 ! video/x-raw,framerate=%d/1 !
> videoconvert ! appsink name=%s"
>
> ** %s - initialized with relevant strings...
>
> I've noticed that there is a delay of ~1 seconds per 24 hours (I
> compared
> the GStreamer's video to the live video of the camera web page),
> after few
> days, the delay is quite significant.
>
> Can you please advise how to overcome this issue. (ntp-sync? or
> something
> else)
>
> I've tried to pull video from another camera (Axis), and it works
> well with
> quite constant delay (~2-3 seconds) for 10 days.
>
> Thanks in advance,
> Itk
>
>
>
>
> --
> Sent from: http://gstreamer-devel.966125.n4.nabble.com/
> _______________________________________________
> gstreamer-devel mailing list
> [hidden email]
> https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel

--
Olivier Crête
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[Retropotenza]

I would check NTP settings on the camera side as well. The camera web page will probably use a custom renderer, with a custom protocol (or custom adaptations).

You may try to connect to the camera with VLC and run the same test, to restrict the scope of your investigations.

Vincenzo

Il giorno 28/08/18, 20:55 "gstreamer-devel per conto di Olivier Crête" <[hidden email] per conto di [hidden email]> ha scritto:

    Hi,
   
    You may want to set buffer-mode=slave on rtspsrc, in case the auto
    doesn't realize that it's a live stream for some reason. In theory,
    GStreamer should adapt to the sender clock and the delay should be
    constant. But it's also possible you hitting a bug somewhere and since
    it takes so long to reproduce, it would be long to fix...
   
    Olivier
   
   
    On Tue, 2018-08-28 at 07:52 -0500, Itk wrote:
    > Hi All,
    >
    > I'm using GStreamer 1.8.3 for streaming video from Hikvision IP
    > camera
    > through RTSP.
    > My pipe is as follows:
    > "rtspsrc location=%s protocols=%s user-agent=%s ! rtph264depay !
    > avdec_h264
    > ! videoscale ! videorate drop-only=1 ! video/x-raw,framerate=%d/1 !
    > videoconvert ! appsink name=%s"
    >
    > ** %s - initialized with relevant strings...
    >
    > I've noticed that there is a delay of ~1 seconds per 24 hours (I
    > compared
    > the GStreamer's video to the live video of the camera web page),
    > after few
    > days, the delay is quite significant.
    >
    > Can you please advise how to overcome this issue. (ntp-sync? or
    > something
    > else)
    >
    > I've tried to pull video from another camera (Axis), and it works
    > well with
    > quite constant delay (~2-3 seconds) for 10 days.
    >
    > Thanks in advance,
    > Itk
    >
    >
    >
    >
    > --
    > Sent from: http://gstreamer-devel.966125.n4.nabble.com/
    > _______________________________________________
    > gstreamer-devel mailing list
    > [hidden email]
    > https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel
    --
    Olivier Crête
    [hidden email]
   
    _______________________________________________
    gstreamer-devel mailing list
    [hidden email]
    https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel
   


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