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Created by Aaron Boxer@boxerabContributor

webrtcbin: adding transceiver causes segfault

Code snippet to reproduce issue:

 GstCaps *caps = gst_caps_new_simple (
        "application/x-rtp",
        "media", G_TYPE_STRING, "video",
        "payload", G_TYPE_INT, 96,
        "encoding-name", G_TYPE_STRING, "H264",
        NULL);
    GstElement *webrtc = gst_element_factory_make ("webrtcbin", "send");
    g_signal_emit_by_name (webrtc, "add-transceiver",
        GST_WEBRTC_RTP_TRANSCEIVER_DIRECTION_SENDONLY,
        caps);

stack trace:

Thread 1 "pipeline" received signal SIGSEGV, Segmentation fault.
0x00007ffff7cf58ed in ?? () from /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
(gdb) bt
#0  0x00007ffff7cf58ed in  () at /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#1  0x00007ffff7d0d22e in g_signal_emit_valist ()
    at /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#2  0x00007ffff7d0dfa9 in g_signal_emit_by_name ()
    at /usr/lib/x86_64-linux-gnu/libgobject-2.0.so.0
#3  0x0000555555558b67 in new_webrtcbin (data=0x7fffffffda60) at pipeline.c:255