Live Station overview

Summary

Live Station is a video encoding platform that provides all the features needed to build a real-time live broadcast service.
With Live Station, you can easily and quickly create multiple multi-bitrate output streams from a single RTMP source stream through a web interface, and packetize and transmit video to HLS and DASH.
In addition to converting a single high-definition live video to various quality, it also provides a real-time digital video recorder (DVR) feature, which allows you to build a broadcast replay service using the generated video files.

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, Afreeca TV, etc., 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

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

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

Create 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 StringToSign matching the request, encrypt using SecretKey with HmacSHA256 algorithm, and encode using Base64.

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

    Request	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
*/



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 "{ \"channelName\": \"api-guide\", \"qualitySetId\": 1234, \"qualitySetId\": false, \"record\" : {\"type\":\"NO_RECORD\"}, \"cdn\": { \"createCdn\" : true, \"cdnType\": \"GLOBAL_EDGE\", \"profileId\":1111, \"regionType\":\"KOREA\", \"cdnInstanceNo\":123456}, \"drmEnabledYn\":false}"

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.