Live Station overview

Overview

Live Station is a real-time video encoding platform that provides all the necessary features for building a live broadcasting service.
Live Station allows you to create several multi-bitrate output streams quickly and easily with a single RTMP original stream through its web interface. You can also packetize a video into HLS and DASH formats and send it.
It provides not only a feature that converts high-definition live video into various image quality levels, but also a real-time digital video recorder (DVR). You can also build a replay service using the video files you've created.

It also provides the re-streaming feature where you can simultaneously transmit live media videos to other platforms easily. You can transmit videos simultaneously to various broadcasting platforms, such as YouTube, Twitch, and Afreeca TV, and manage the transmission statuses at once in Live Station.

Common settings

Live Station API URL

https://livestation.apigw.ntruss.com/api/v2

Request headers

Authentication header

API Gateway authentication is required to use the Live Station API.

Refer to NAVER Cloud Platform API for more detailed guides related to API Gateway authentication.

Creating AUTHPARAMS

AUTHPARAMS request example

curl -i -X GET \
   -H "x-ncp-apigw-timestamp:1505290625682" \
   -H "x-ncp-iam-access-key:D78BB444D6D3C84CA38A" \
   -H "x-ncp-apigw-signature-v2:WTPItrmMIfLUk/UyUIyoQbA/z5hq9o3G8eQMolUzTEo=" \
   -H "x-ncp-region_code:KR" \
'https://livestation.apigw.ntruss.com/api/v2/channels'

• Create a signature (add a new line with \n)

  • Create a StringToSign appropriate for your request, encrypt it with your secret key and the HMACSHA256 algorithm, and encode it with Base64.

  • This value is used as x-ncp-apigw-signature-v2.

    Requests	StringToSign
    GET /api/v2/channels?pageNo=1 x-ncp-apigw-timestamp={timestamp} x-ncp-iam-access-key={accesskey} x-ncp-apigw-signature-v2={signature}	GET /api/v2/channels?pageNo=1 {timeStamp} {accessKey}

• Sample code

public String makeSignature() {
    String space = " ";					// Space
    String newLine = "\n";  				// Line break
    String method = "GET";  				// HTTP method
    String url = "/api/v2/channels?pageNo=1";	// Full URL under "/" (including query strings), excluding the domain
    String accessKey = "{accessKey}";		// access key id (from portal or Sub Account)
    String secretKey = "{secretKey}";		// secret key (from portal or Sub Account)
    String timestamp = String.valueOf(System.currentTimeMillis());		// Current timestamp (epoch, millisecond)

    String message = new StringBuilder()
        .append(method)
        .append(space)
        .append(url)
        .append(newLine)
        .append(timestamp)
        .append(newLine)
        .append(accessKey)
        .toString();

    SecretKeySpec signingKey = new SecretKeySpec(secretKey.getBytes("UTF-8"), "HmacSHA256");
    Mac mac = Mac.getInstance("HmacSHA256");
    mac.init(signingKey);

    byte[] rawHmac = mac.doFinal(message.getBytes("UTF-8"));
    String encodeBase64String = Base64.encodeBase64String(rawHmac);

  return encodeBase64String;
}

/*
https://code.google.com/archive/p/crypto-js/
https://storage.googleapis.com/google-code-archive-downloads/v2/code.google.com/crypto-js/CryptoJS%20v3.1.2.zip
*/

/*
CryptoJS v3.1.2
code.google.com/p/crypto-js
(c) 2009-2013 by Jeff Mott. All rights reserved.
code.google.com/p/crypto-js/wiki/License
*/
<script type="text/javascript" src="./CryptoJS/rollups/hmac-sha256.js"></script>
<script type="text/javascript" src="./CryptoJS/components/enc-base64.js"></script>

function makeSignature(secretKey, method, url, timestamp, accessKey) {
	var space = " ";
	var newLine = "\n";

	var hmac = CryptoJS.algo.HMAC.create(CryptoJS.algo.SHA256, secretKey); // secret key
	hmac.update(method);		// HTTP method
	hmac.update(space);		// Space
	hmac.update(url);		// Full URL under "/" (including query strings), excluding the domain
	hmac.update(newLine);		// Line break
	hmac.update(timestamp);		// Current timestamp (epoch, millisecond)
	hmac.update(newLine);		// Line break
	hmac.update(accessKey);		// access key (from portal or iam)

	var hash = hmac.finalize();

	return hash.toString(CryptoJS.enc.Base64);
}

import sys
import os
import hashlib
import hmac
import base64
import requests
import time

def	make_signature():
	timestamp = int(time.time() * 1000)
	timestamp = str(timestamp)				# Current timestamp (epoch, millisecond)

	access_key = "{accessKey}"				# access key id (from portal or Sub Account)
	secret_key = "{secretKey}"				# secret key (from portal or Sub Account)
	secret_key = bytes(secret_key, 'UTF-8')

	method = "GET"						# HTTP method
	uri = "/api/v2/channels?pageNo=1"			# Full URL under "/" (including query strings), excluding the domain

	message = method + " " + uri + "\n" + timestamp + "\n"
	+ access_key
	message = bytes(message, 'UTF-8')
	signingKey = base64.b64encode(hmac.new(secret_key, message, digestmod=hashlib.sha256).digest())
	return signingKey

function makeSignature() {
	nl=$'\\n'

	TIMESTAMP=$(echo $(date +%s000))	# Current timestamp (epoch, millisecond)
	ACCESSKEY="{accessKey}"				# access key id (from portal or Sub Account)
	SECRETKEY="{secretKey}"				# secret key (from portal or Sub Account)
	METHOD="GET"					# HTTP method
	URI="/api/v2/channels?pageNo=1"		# Full URL under "/" (including query strings), excluding the domain

	SIG="$METHOD"' '"$URI"${nl}
	SIG+="$TIMESTAMP"${nl}
	SIG+="$ACCESSKEY"

	SIGNATURE=$(echo -n -e "$SIG"|iconv -t utf8 |openssl dgst -sha256 -hmac $SECRETKEY -binary|openssl enc -base64)
}

Live Station API request configuration

Header
  x-ncp-apigw-timestamp:{Timestamp}
  x-ncp-iam-access-key:{Sub Account Access Key}
  x-ncp-apigw-signature-v2:{API Gateway Signature}
  x-ncp-region_code:KR
  Content-Type:application/json
Body
  Json Object
URL
  https://livestation.apigw.ntruss.com/api/v2/{action}

Live Station API request sample

curl -i -s -X POST \
   -H "Content-Type:application/json" \
   -H "x-ncp-apigw-timestamp:1521787414578" \
   -H "x-ncp-iam-access-key:6uxz1nKkcYwUjWRG5Q1V7NsW0i5jErlu2NjBXXgy" \
   -H "x-ncp-apigw-signature-v2:iJFK773KH0WwQ79PasqJ+ZGixtpDQ/abS57WGQdld2M=" \
   -H "x-ncp-region_code:KR" \
   "https://livestation.apigw.ntruss.com/api/v2/channles"\
   -d "{ \"name\": \"api-guide\", \"qualitySetId\": 1234, \"cdnType\": \"CDN_PLUS\" }"

Live Station API Content-Type

application/json is used for the content-type of all data delivered through Live Station API HTTP requests and response bodies.