RTP with FEC enabled stream fails

[GStreamer-devel mailing list]

I am testing FEC integration for video streaming, so I have tested the
pipelines provided by the documentation for sending/receiving fec enabled
streams as follows:

receiver:
gst-launch-1.0 udpsrc port=9001 caps="application/x-rtp" ! rtpstorage
size-time=220000000 ! rtpssrcdemux ! application/x-rtp, payload=96,
clock-rate=90000, media=video, encoding-name=H264 ! rtpjitterbuffer
do-lost=1 latency=200 !  rtpulpfecdec ! rtph264depay ! h264parse !
avdec_h264 ! videoconvert ! autovideosink sync=false

sender:
gst-launch-1.0 videotestsrc ! x264enc ! video/x-h264, profile=baseline !
rtph264pay pt=96 ! rtpulpfecenc percentage=100 ! udpsink port=9001 -v

These pipelines work fine and the video starts playing. If I restarted the
receiver pipeline then it will still play without problem. However, if I
restarted the sender pipeline, the receiver fails with the following
message:
:00:54.028139185 29777 0x56351c03e4f0 WARN                 basesrc
gstbasesrc.c:3055:gst_base_src_loop:<udpsrc0> error: Internal data stream
error.
0:00:54.028159073 29777 0x56351c03e4f0 WARN                 basesrc
gstbasesrc.c:3055:gst_base_src_loop:<udpsrc0> error: streaming stopped,
reason not-linked (-1)
ERROR: from element /GstPipeline:pipeline0/GstUDPSrc:udpsrc0: Internal data
stream error.
Additional debug info:
gstbasesrc.c(3055): gst_base_src_loop ():
/GstPipeline:pipeline0/GstUDPSrc:udpsrc0:
streaming stopped, reason not-linked (-1)

I am suspecting that its due to ssrc is changing when the sender is
restarted.
Is there any suggestion to resolve this issue?



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[GStreamer-devel mailing list]

Hey, if not using FEC for webRTC I recommend using 2D FEC instead:

http://mathieuduponchelle.github.io/2020-10-09-SMPTE-2022-1-2D-Forward-Error-Correction-in-GStreamer.html

Best,

--
Mathieu Duponchelle · https://www.centricular.com <https://www.centricular.com>

On 5/12/21 6:41 AM, myamens via gstreamer-devel wrote:

> I am testing FEC integration for video streaming, so I have tested the
> pipelines provided by the documentation for sending/receiving fec enabled
> streams as follows:
>
> receiver:
> gst-launch-1.0 udpsrc port=9001 caps="application/x-rtp" ! rtpstorage
> size-time=220000000 ! rtpssrcdemux ! application/x-rtp, payload=96,
> clock-rate=90000, media=video, encoding-name=H264 ! rtpjitterbuffer
> do-lost=1 latency=200 !  rtpulpfecdec ! rtph264depay ! h264parse !
> avdec_h264 ! videoconvert ! autovideosink sync=false
>
> sender:
> gst-launch-1.0 videotestsrc ! x264enc ! video/x-h264, profile=baseline !
> rtph264pay pt=96 ! rtpulpfecenc percentage=100 ! udpsink port=9001 -v
>
> These pipelines work fine and the video starts playing. If I restarted the
> receiver pipeline then it will still play without problem. However, if I
> restarted the sender pipeline, the receiver fails with the following
> message:
> :00:54.028139185 29777 0x56351c03e4f0 WARN                 basesrc
> gstbasesrc.c:3055:gst_base_src_loop:<udpsrc0> error: Internal data stream
> error.
> 0:00:54.028159073 29777 0x56351c03e4f0 WARN                 basesrc
> gstbasesrc.c:3055:gst_base_src_loop:<udpsrc0> error: streaming stopped,
> reason not-linked (-1)
> ERROR: from element /GstPipeline:pipeline0/GstUDPSrc:udpsrc0: Internal data
> stream error.
> Additional debug info:
> gstbasesrc.c(3055): gst_base_src_loop ():
> /GstPipeline:pipeline0/GstUDPSrc:udpsrc0:
> streaming stopped, reason not-linked (-1)
>
> I am suspecting that its due to ssrc is changing when the sender is
> restarted.
> Is there any suggestion to resolve this issue?
>
>
>
> --
> Sent from: http://gstreamer-devel.966125.n4.nabble.com/
> _______________________________________________
> gstreamer-devel mailing list
> [hidden email]
> https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel

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