Do GStreamer handle loss of key frames (H264)?

[Marcos Kintschner]

I'm trying to understand if and how GStreamer handle a lost IDR frame.
I know there is an event called GstForceKeyUnit that is sent by
rtph264depay when this element receives data before setting SPS/PPS and
that this event is then processed by rtpsession that generates a RTCP/PLI
message. But it seems that rtph264depay doens't send the event when it
receives a P-Slice before a IDR-Slice, for example. Do I have to handle it
manually by adding probes and checking if the IDR has arrived or not?

-- 
Marcos Kintschner.
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