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An example of stream convertion to HLS and playing it in browser supporting HLS natively

The player shows how to convert stream published on WCS server to HLS and play it in browser. HLS stream cut starts automatically when strea is requested by HLS URL, for example https://demo.flashphoner.com:8445/test/test.m3u8 on the screenshot below

The code of the example

The source code can be accessed on server by the following path:

/usr/local/FlashphonerWebCallServer/client2/examples/demo/streaming/hls-js-player

hls-native.css - player page styles file
hls-native.html - player page
hls-native.js - player lauhcn script

The example can be tested using the fiollowing URL:

https://host:8888/client2/examples/demo/streaming/hls-js-player/hls-js-player.html

Where host is WCS server address

Analyzing the code of the example

To analize the code get hls-native.js file version with hash 51703a2 which is available here and can be downloaded in build 0.5.28.2753.141.

1. A server HLS URL detection

getHLSUrl() code

function initPage() {
    $("#header").text("HLS Native Player Minimal");
    $("#urlServer").val(getHLSUrl());
    ...
}

2. div element setup to pass to the player

code

A div element for stream playback is passed to player

function initPage() {
    ...
    remoteVideo = document.getElementById('remoteVideo');
    remoteVideo.style ="background-color: lightgrey;";
}

3. Stream name detection (the stream should be published to server)

encodeURIComponent() code

function playBtnClick() {
    if (validateForm()) {
        var streamName = $('#playStream').val();
        streamName = encodeURIComponent(streamName);
        ...
    }
}

4. HLS stream URL forming

code

If authentication key and token are set, they will be included to stream URL

function playBtnClick() {
    if (validateForm()) {
        ...
        var videoSrc = $("#urlServer").val() + '/' + streamName + '/' + streamName + '.m3u8';
        var key = $('#key').val();
        var token = $("#token").val();
        if (key.length > 0 && token.length > 0) {
            videoSrc += "?" + key + "=" + token;
        }
        ...
    }
}

5. Player starting

code

If browser does not support HLS playback natively, player will not be launched and a warning will be displayed

function playBtnClick() {
    if (validateForm()) {
        ...
        if (remoteVideo.canPlayType('application/vnd.apple.mpegurl')) {
            remoteVideo.src = videoSrc;
            remoteVideo.addEventListener('loadedmetadata', function() {
                console.log("Play native HLS");
                remoteVideo.play();
                onStarted();
            });
        }
        else {
            $("#notifyFlash").text("Your browser doesn't support native HLS playback");
        }
    }
}

6. Playback stopping

code

function stopBtnClick() {
    if (remoteVideo != null) {
        console.log("Stop HTML5 player");
        remoteVideo.pause();
        remoteVideo.currentTime = 0;
        remoteVideo.removeAttribute('src');
        remoteVideo.load();
    }
    onStopped();
}
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