Delay at the beginning of UDP/RTP streaming

[Aaron Boxer]

Hi Milos,

I see you are using custom plugins cmptoj2k* for jpeg 2000
encoding/decoding. It may be difficult to assess the problem, given that we
don't know how these plugins operate.
Is the rest of your pipeline using standard gstreamer plugins, or have you
customized any of the other plugins?

Thanks,
Aaron


On Wed, Jun 22, 2016 at 4:08 AM, Miloš Selečéni <
milos.seleceni at comprimato.com> wrote:

> Hi I've basic (server/client) pipeline for video streaming based on
> UDP/RTP protocols. Things are working but at the beginning I've got huge
> stall at the client side.
>
> There are two options how you can start your connection.
>
> 1) start the server first, then start your client   [works OK]
>
> 2) start the client first then start server [big stall at the beginning]
>
> In first option there is no stall when client connect to the server at the
> time when the server is already streaming.
>
> In second option there is few seconds stall at client side. Even though
> (according to tcpdump and Wireshark) UDP packets are received at client
> side from the very beginning. I found out that this happens when the
> jitterbuffer starts reseting
>
> -- jitterbuffer 3009 pending timers > 3000 - resetting
>
> after few jitterbuffer resets It either recover and continue normaly or freeze and reseting only
>
> Do you have any idea why this is happening ?
>
>
> My pipelines:
>
> SERVER:
>
> DEST=172.22.10.57
>
> VSOURCE_3="filesrc location=... ! qtdemux ! h264parse ! avdec_h264"
>
> VENC_ts="cmptoj2kenc ! mpegtsmux ! rtpmp2tpay"
>
> VRTPSINK="udpsink port=5000 host=$DEST ts-offset=$VOFFSET name=vrtpsink"
>
> VRTCPSINK="udpsink port=5001 host=$DEST sync=false async=false
> name=vrtcpsink"
> VRTCPSRC="udpsrc port=5005 name=vrtpsrc"VENC_ts="cmptoj2kenc ! mpegtsmux !
> rtpmp2tpay"
>
> ./gst-launch-1.0 --gst-debug=2,cmptoj2kenc:5 rtpbin name=rtpbin \
>
> $VSOURCE_3 ! $VENC_ts ! rtprtxqueue ! rtpbin.send_rtp_sink_0 \
>
> rtpbin.send_rtp_src_0 ! $VRTPSINK \
>
> rtpbin.send_rtcp_src_0 ! $VRTCPSINK \
> $VRTCPSRC ! rtpbin.recv_rtcp_sink_0
>
>
> CLIENT:
>
> DEST=172.22.10.85
>
>
> VIDEO_CAPS="application/x-rtp,media=(string)video,clock-rate=(int)90000,encoding-name=(string)MP2T-ES,payload=(int)33"
>
> VIDEO_DEC_ts="rtpmp2tdepay ! tsdemux ! cmptoj2kdec colorspace=yuv"
> VIDEO_SINK="videoconvert ! autovideosink sync=false"
> LATENCY=200
>
> ./gst-launch-1.0 --gst-debug=2,cmptoj2kdec:5 rtpbin name=rtpbin
> buffer-mode=buffer latency=$LATENCY    \
>     udpsrc caps=$VIDEO_CAPS port=5000 buffer-size=2000000 !
> rtpbin.recv_rtp_sink_0                     \
>       rtpbin. ! $VIDEO_DEC_ts ! $VIDEO_SINK
>                              \
>     udpsrc port=5001 ! rtpbin.recv_rtcp_sink_0
>                             \
>       rtpbin.send_rtcp_src_0 ! udpsink port=5005 host=$DEST sync=false
> async=false
>
> *Miloš Selečéni*
>
> *GPU Developer | Comprimato Systems s.r.o.*
>
> _______________________________________________
> gstreamer-devel mailing list
> gstreamer-devel at lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel
>
>
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