WebRTC on-negotiation needed signal isn't emitted

[Lusine Hayrapetyan]

Hi Folks.

I'm working on Nvidia's Jetson device where we have Gstreamer 1.14.
And we have a very unstable situation with webrtc -  *on-negotiation-needed*
signal is not always emitted.

The first log is the case where we don't see an issue, You can see that
after changing webrtc state from paused->playing if_negotiation_is_needed
is called and after that on-negotiation-needed signal is emitted:[image:
webrtc-good.png]

This is the case when it doesn't work. You can see that after changing
webrtc state from paused->playing if_negotiation_is_needed is *NOT* called
and after that on-negotiation-needed signal is *NOT* emitted.[image:
webrtc-bad.png]

The issue is very similar to this one -
https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/issues/1055
which is reported for Gstreamer 1.14 and I suppose fixed for 1.8.

Could you please advise a workaround which I can implement with Gstreamer
1.14 because on jetson we can't upgrade to 1.18.

Regards,
Lusine
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