Unknown option: "-3" Unix manual page for CURLOPT_RTSP_TRANSPORT. (host=minya system=Darwin)
CURLOPT_RTSP_TRANSPORT(3)  curl_easy_setopt options  CURLOPT_RTSP_TRANSPORT(3)

NAME
       CURLOPT_RTSP_TRANSPORT - set RTSP Transport: header

SYNOPSIS
       #include <curl/curl.h>

       CURLcode curl_easy_setopt(CURL *handle, CURLOPT_RTSP_TRANSPORT,
                                 char *transport);

DESCRIPTION
       Pass  a  char  * to tell libcurl what to pass for the Transport: header
       for this RTSP session. This is mainly a  convenience  method  to  avoid
       needing  to set a custom Transport: header for every SETUP request. The
       application must  set  a  Transport:  header  before  issuing  a  SETUP
       request.

       The  application  does not have to keep the string around after setting
       this option.

DEFAULT
       NULL

PROTOCOLS
       RTSP

EXAMPLE
       TODO

AVAILABILITY
       Added in 7.20.0

RETURN VALUE
       Returns CURLE_OK if the option is  supported,  CURLE_UNKNOWN_OPTION  if
       not, or CURLE_OUT_OF_MEMORY if there was insufficient heap space.

SEE ALSO
       CURLOPT_RTSP_REQUEST(3), CURLOPT_RTSP_SESSION_ID(3),

libcurl 7.54.0                 December 21, 2016     CURLOPT_RTSP_TRANSPORT(3)