Player example

This player can be used to play any type of stream on Web Call Server

RTSP
WebRTC
RTMP

On the screenshot below an RTSP stream is being playing in the web player.

Code of the example

The path to the source code of the example on WCS server is:

/usr/local/FlashphonerWebCallServer/client2/examples/demo/streaming/player

player.css - file with styles
player.html - page of the player
player.js - script providing functionality for the player

This example can be tested using the following address:

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

Here host is the address of the WCS server.

Analyzing the code

To analyze the code, let's take the version of file player.js with hash 7fff01f, which is available here and can be downloaded with corresponding build 2.0.219.

1. Initialization of the API

Flashphoner.init() code

        Flashphoner.init({
            receiverLocation: '../../dependencies/websocket-player/WSReceiver2.js',
            decoderLocation: '../../dependencies/websocket-player/video-worker2.js',
            preferredMediaProvider: mediaProvider
        });

2. Connection to server

Flashphoner.createSession() code

    Flashphoner.createSession({urlServer: url}).on(SESSION_STATUS.ESTABLISHED, function(session){
        ...
    }).on(SESSION_STATUS.DISCONNECTED, function(){
        ...
    }).on(SESSION_STATUS.FAILED, function(){
        ...
    });

3. Receiving the event confirming successful connection

SESSION_STATUS.ESTABLISHED code

    Flashphoner.createSession({urlServer: url}).on(SESSION_STATUS.ESTABLISHED, function(session){
        setStatus(session.status());
        //session connected, start playback
        playStream(session);
    }).on(SESSION_STATUS.DISCONNECTED, function(){
        ...
    }).on(SESSION_STATUS.FAILED, function(){
        ...
    });

4. Playback of video stream

Session.createStream(), Stream.play() code

    stream = session.createStream(options).on(STREAM_STATUS.PENDING, function (stream) {
        ...
    });
    stream.play();

When stream is created, the following parameters are passed

streamName - name of the stream (rtsp:// address in this case)
remoteVideo - div element, in which the video will be displayed
picture resolution to transcode
unmutePlayOnStart: false - disables automatic audio unmuting for autoplay to conform browsers requirements

code

    var options = {
        name: streamName,
        display: remoteVideo,
        flashShowFullScreenButton: true
    };
    if (Flashphoner.getMediaProviders()[0] === "MSE" && mseCutByIFrameOnly) {
        options.mediaConnectionConstraints = {
            cutByIFrameOnly: mseCutByIFrameOnly
        }
    }
    if (resolution_for_wsplayer) {
        options.playWidth = resolution_for_wsplayer.playWidth;
        options.playHeight = resolution_for_wsplayer.playHeight;
    } else if (resolution) {
        options.playWidth = resolution.split("x")[0];
        options.playHeight = resolution.split("x")[1];
    }
    if (autoplay) {
        options.unmutePlayOnStart = false;
    }

5. Receiving the event confirming successful stream playback

STREAM_STATUS.PLAYING code

    stream = session.createStream(options).on(STREAM_STATUS.PENDING, function (stream) {
        ...
    }).on(STREAM_STATUS.PLAYING, function (stream) {
        $("#preloader").hide();
        setStatus(stream.status());
        onStarted(stream);
    }).on(STREAM_STATUS.STOPPED, function() {
        ...
    }).on(STREAM_STATUS.FAILED, function() {
        ...
    });
    stream.play();

6. Handling the event about channel bandwith

STREAM_EVENT, STREAM_EVENT_TYPE.NOT_ENOUGH_BANDWIDTH code

    }).on(STREAM_EVENT, function(streamEvent){
        if (STREAM_EVENT_TYPE.NOT_ENOUGH_BANDWIDTH === streamEvent.type) {
            var info = streamEvent.payload.info.split("/");
            var remoteBitrate = info[0];
            var networkBandwidth = info[1];
            console.log("Not enough bandwidth, consider using lower video resolution or bitrate. Bandwidth " + (Math.round(networkBandwidth / 1000)) + " bitrate " + (Math.round(remoteBitrate / 1000)));
        } else if (STREAM_EVENT_TYPE.RESIZE === streamEvent.type) {
            ...
        }
    });

7. Handling the event about changing stream picture size

STREAM_EVENT, STREAM_EVENT_TYPE.RESIZE code

    }).on(STREAM_EVENT, function(streamEvent){
            ...
        } else if (STREAM_EVENT_TYPE.RESIZE === streamEvent.type) {
            console.log("New video size: " + streamEvent.payload.streamerVideoWidth + "x" + streamEvent.payload.streamerVideoHeight);
        }
    });

8. Playback stop

Stream.stop() code

function onStarted(stream) {
    $("#playBtn").text("Stop").off('click').click(function(){
        $(this).prop('disabled', true);
        stream.stop();
    }).prop('disabled', false);
    ...
}

9. Receiving the event confirming successful stream playback stop

STREAM_STATUS.STOPPED code

    stream = session.createStream(options).on(STREAM_STATUS.PENDING, function (stream) {
        ...
    }).on(STREAM_STATUS.STOPPED, function () {
        $("#preloader").hide();
        setStatus(STREAM_STATUS.STOPPED);
        onStopped();
    }).on(STREAM_STATUS.FAILED, function() {
        ...
    }).play();

10. Playback volume control

Stream.unmuteRemoteAudio(), Stream.setVolume() code

    $("#volumeControl").slider({
        range: "min",
        min: 0,
        max: 100,
        value: currentVolumeValue,
        step: 10,
        animate: true,
        slide: function(event, ui) {
            //WCS-2375. fixed autoplay in ios safari
            if (stream.isRemoteAudioMuted()) {
                stream.unmuteRemoteAudio();
            }
            currentVolumeValue = ui.value;
            stream.setVolume(currentVolumeValue);
        }
    }).slider("disable");

11. Playback automatic start on page load

code

    if (autoplay) {
        // We can start autoplay with muted audio only, so set volume slider to 0 #WCS-2425
        $("#volumeControl").slider('value', 0);
        $("#playBtn").click();
    }

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Player example

Code of the example

Analyzing the code