---
name: "CURLOPT_RTSP_TRANSPORT"
section: "3"
platform: "linux"
package: "curl"
version: "8.23.0-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux", "macos"]
url: "https://new.carta.tech/CURLOPT_RTSP_TRANSPORT"
---

# CURLOPT\_RTSP\_TRANSPORT(3)

RTSP Transport: header

## NAME

CURLOPT\_RTSP\_TRANSPORT - RTSP Transport: header

## SYNOPSIS

```
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_RTSP_TRANSPORT,
                          char *transport);
```

## DESCRIPTION

Pass a char pointer 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

This functionality affects rtsp only

## EXAMPLE

```
int main(void)
{
  CURL *curl = curl_easy_init();
  if(curl) {
    CURLcode result;
    curl_easy_setopt(curl, CURLOPT_URL, "rtsp://example.com/");
    curl_easy_setopt(curl, CURLOPT_RTSP_REQUEST, CURL_RTSPREQ_SETUP);
    curl_easy_setopt(curl, CURLOPT_RTSP_TRANSPORT,
                     "RTP/AVP;unicast;client_port=4588-4589");
    result = curl_easy_perform(curl);
    curl_easy_cleanup(curl);
  }
}
```

## HISTORY

**CURL\_RTSPREQ\_**\* enums became *long* types in 8.13.0, prior to this version a *long* cast was necessary when passed to *[curl\_easy\_setopt(3)](/curl_easy_setopt/3.md)*.

## AVAILABILITY

Added in curl 7.20.0

## RETURN VALUE

*[curl\_easy\_setopt(3)](/curl_easy_setopt/3.md)* returns a CURLcode indicating success or error.

CURLE\_OK (0) means everything was OK, non-zero means an error occurred, see *[libcurl-errors(3)](/libcurl-errors/3.md)*.

## SEE ALSO

[**CURLOPT\_RTSP\_REQUEST**(3)](/CURLOPT_RTSP_REQUEST/3.md), [**CURLOPT\_RTSP\_SESSION\_ID**(3)](/CURLOPT_RTSP_SESSION_ID/3.md)