Custom pointer to rtsp interleave callback
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_INTERLEAVEDATA, void *pointer);
This is the userdata pointer that will be passed to CURLOPT_INTERLEAVEFUNCTION(3) when interleaved RTP data is received.
Added in 7.20.0
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.