set srtp-key to udpsrc caps

[Alicia Romero]

Hi!
I want to set to udpsrc the srtp-key for using the plugin srtp:

[...]
char key[]="0123456789012345678901234567890"

GstBuffer *buf = gst_buffer_new_wrapped ( g_memdup(key, strlen(key_ptr)),

strlen(key_ptr));

GstCaps *caps = gst_caps_new_simple ("application/x-srtp",
      "media", G_TYPE_STRING, "video",
      "clock-rate", G_TYPE_INT, 90000,
      "srtp-key", G_TYPE_POINTER, buf,
      NULL);

[..]

But this is not workin, in fact there is a SIGSEGV.
I don't know how to do that, can anyone help me?

Thanks!
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