proxysink/src timing/lag/stutter issue.

[Chris Duncan]

I think this is entirely down to the "media-pipeline" created by rtspserver
being out of sync. Looking into this now.

Regards,
Chris

On Thu, May 24, 2018 at 5:11 PM <daniel at poradnik-webmastera.com> wrote:

> W dniu 2018-05-24 16:56, Chris Duncan napisał(a):
> > I may be implementing proxysink/src incorrectly but i am having
> > issues. It seems as though proxysrc is either queuing up buffers or
> > there is a timestamping issue. Any help would be greatly appreciated.
> >
> > #!/usr/bin/python3
> > import gi
> > gi.require_version('Gst', '1.0')
> > gi.require_version('GstRtspServer', '1.0')
> > from gi.repository import Gst, GstRtspServer, GObject
> >
> > class RTSP_Factory(GstRtspServer.RTSPMediaFactory):
> >     def __init__(self, pipeline, clock):
> >         self.clock=clock
> >         self.pipeline = pipeline
> >         GstRtspServer.RTSPMediaFactory.__init__(self)
> >
> >     def do_create_element(self, url):
> >         self.pipeline.set_start_time(Gst.CLOCK_TIME_NONE)
> >         return self.pipeline
> >
> >     def do_configure(self, media):
> >         media.set_shared(True)
> >
> > Gst.init()
> > GObject.threads_init()
> > loop = GObject.MainLoop()
> > Gst.debug_set_active(True)
> > Gst.debug_set_default_threshold(4)
> >
> > mainpipeline = Gst.parse_launch("nvcamerasrc "
> >                                 "! video/x-raw(memory:NVMM),
> > width=(int)2592, height=(int)1458, format=(string)I420,
> > framerate=(fraction)30/1 "
> >                                 "! omxh264enc bitrate=4000000
> > profile=2 control-rate=2 insert-sps-pps=true insert-aud=true
> > insert-vui=true iframeinterval=20 "
> >                                 "! video/x-h264,
> > stream-format=byte-stream, profile=(string)main "
> >                                 "! tee ! proxysink name=psink")
> >
> > rtsppipeline = Gst.parse_launch("proxysrc name=psrc is-live=true !
> > queue name=rq max-size-buffers=3 ! h264parse ! rtph264pay name=pay0
> > pt=96 config-interval=1")
> >
> > sysclock = Gst.SystemClock.obtain()
> >
> > psink = mainpipeline.get_by_name("psink")
> > psrc = rtsppipeline.get_by_name("psrc")
> >
> > psrc.set_property("proxysink", psink)
> >
> > mainpipeline.use_clock(sysclock)
> > rtsppipeline.use_clock(sysclock)
> > mainpipeline.set_base_time(0)
> > rtsppipeline.set_base_time(0)
> > #mainpipeline.set_start_time(Gst.CLOCK_TIME_NONE)
> > rtsppipeline.set_start_time(Gst.CLOCK_TIME_NONE)
> >
> > server = GstRtspServer.RTSPServer()
> > mounts = server.get_mount_points()
> > factory = RTSP_Factory(rtsppipeline, sysclock)
> >
> > mounts.add_factory("/test", factory)
> > server.attach(None)
> >
> > mainpipeline.set_state(Gst.State.PLAYING)
> > loop.run()
> >
> > Regards,
> > Chris
> > _______________________________________________
> > gstreamer-devel mailing list
> > gstreamer-devel at lists.freedesktop.org
> > https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel
>
> I asked similar question yesterday. Fortunately today after doing some
> tests I have found why it does not work and how to fix it. When pipeline
> goes to PLAYING state, it updates its base time to current time. To fix
> this, you have to get base time from one pipeline and set it as base
> time for second one. I do this just after setting state of 2nd one to
> PLAYING.
>
> You also should remove lines which change start time, this produces some
> strange results.
>
> Regards,
> Daniel
> _______________________________________________
> gstreamer-devel mailing list
> gstreamer-devel at lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel
>
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