---
name: "CURLOPT_RTSP_CLIENT_CSEQ"
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_CLIENT_CSEQ"
---

# CURLOPT\_RTSP\_CLIENT\_CSEQ(3)

RTSP client CSEQ number

## NAME

CURLOPT\_RTSP\_CLIENT\_CSEQ - RTSP client CSEQ number

## SYNOPSIS

```
#include <curl/curl.h>
CURLcode curl_easy_setopt(CURL *handle, CURLOPT_RTSP_CLIENT_CSEQ, long cseq);
```

## DESCRIPTION

Pass a long to set the CSEQ number to issue for the next RTSP request. Useful if the application is resuming a previously broken connection. The CSEQ increments from this new number henceforth.

## DEFAULT

0

## 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_CLIENT_CSEQ, 1234L);
    result = curl_easy_perform(curl);
    curl_easy_cleanup(curl);
  }
}
```

## 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

[**CURLINFO\_RTSP\_CLIENT\_CSEQ**(3)](/CURLINFO_RTSP_CLIENT_CSEQ/3.md), [**CURLINFO\_RTSP\_SERVER\_CSEQ**(3)](/CURLINFO_RTSP_SERVER_CSEQ/3.md), [**CURLOPT\_RTSP\_REQUEST**(3)](/CURLOPT_RTSP_REQUEST/3.md), [**CURLOPT\_RTSP\_SERVER\_CSEQ**(3)](/CURLOPT_RTSP_SERVER_CSEQ/3.md)