Overview

Supported platforms and browsers

Operation flowchart

 Image Added

1. The browser connects to the server via the Websocket protocol and sends the publish command.
2. The browser captures the microphone and the camera and sends the WebRTC stream to the server.
3. The second browser establishes a connection also via Websocket and sends the play command.
4. The second browser receives the WebRTC stream and plays this stream on the page.

Quick manual on testing

...

Publishing a video stream on the server and playing it via WebRTC in a browser

1. For this test we use the demo server at demo.flashphoner.com and the Two Way Streaming web application

https://demo.flashphoner.com/client2/examples/demo/streaming/two_way_streaming/two_way_streaming.html

2. Establish a connection to the server using the Connect button

Image Added

3. Click Publish. The browser captures the camera and sends the stream to the server.

Image Added

4. Open Two Way Streaming in a separate window, click Connect and provide the identifier of the stream, then click Play.

Image Added

5. Playback diagrams in chrome://webrtc-internals

Image Added

Call flow

Below is the call flow when using the Two Way Streaming example to play the stream

two_way_streaming.html

two_way_streaming.js

Image Added
1. Establishing a connection to the server.

Flashphoner.createSession(); code

    Flashphoner.createSession({urlServer: url}).on(SESSION_STATUS.ESTABLISHED, function (session) {
        setStatus("#connectStatus", session.status());
        onConnected(session);
    }).on(SESSION_STATUS.DISCONNECTED, function () {
        setStatus("#connectStatus", SESSION_STATUS.DISCONNECTED);
        onDisconnected();
    }).on(SESSION_STATUS.FAILED, function () {
        setStatus("#connectStatus", SESSION_STATUS.FAILED);
        onDisconnected();
    });

2. Receiving from the server an event confirming successful connection.

ConnectionStatusEvent ESTABLISHED code

    Flashphoner.createSession({urlServer: url}).on(SESSION_STATUS.ESTABLISHED, function (session) {
        setStatus("#connectStatus", session.status());
        onConnected(session);
    }).on(SESSION_STATUS.DISCONNECTED, function () {
        ... 
    }).on(SESSION_STATUS.FAILED, function () {
        ...
    });

3. Playing the stream.

stream.play(); code

    session.createStream({
        name: streamName,
        display: remoteVideo
        ...
    }).play();

4. Receiving from the server an event confirming successful playing of the stream.

StreamStatusEvent, status PLAYING code

    session.createStream({
        name: streamName,
        display: remoteVideo
    }).on(STREAM_STATUS.PENDING, function(stream) {
        ...
    }).on(STREAM_STATUS.PLAYING, function (stream) {
        setStatus("#playStatus", stream.status());
        onPlaying(stream);
    }).on(STREAM_STATUS.STOPPED, function () {
        ...
    }).on(STREAM_STATUS.FAILED, function (stream) {
        ...
    }).play();

5. Receiving the audio and video stream via WebRTC

6. Stopping playing the stream.

stream.stop(); code

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

7. Receiving from the server an event confirming the playback is stopped.

StreamStatusEvent, status STOPPED code

    session.createStream({
        name: streamName,
        display: remoteVideo
    }).on(STREAM_STATUS.PENDING, function(stream) {
        ...
    }).on(STREAM_STATUS.PLAYING, function (stream) {
        ...
    }).on(STREAM_STATUS.STOPPED, function () {
        setStatus("#playStatus", STREAM_STATUS.STOPPED);
        onStopped();
    }).on(STREAM_STATUS.FAILED, function (stream) {
        ...
    }).play();

Playing two or more streams on the same page

WCS provides possibility to play two or more streams on the same page. In the context of flowchart and call flow playing multiple streams is no different from playing just one.

1. For the test we use:

• the demo server at demo.flashphoner.com;
• the Two Way Streaming web application to publish streams
• the 2 Players web application to play streams

2. Open the Two Way Streaming web application, click Connect, then Publish. Copy the identifier of the first stream from the Play window:

Image Added

3. In another tab, open the Two Way Streaming web application, click Connect, then Publish. Copy the identifier of the second stream from the Play window:

Image Added

4. Open the 2 Players web application and specify identifiers of the first (left) and the second (right) streams:

Image Added

5. Click Play below right and left players:

Image Added

6. Diagrams in chrome://webrtc-internals for the first stream:

Image Added

7. Diagrams in chrome://webrtc-internals for the second stream:

Image Added

Known issues

1) Possible bug in the Safari browser on iOS leads to freezes while playing via WebRTC

Symptoms: video playback stops, while the audio track may continue playing. Recovery needs reloading the page or restarting the browser.

Solution:

а) enable the transcoder on the server by setting the following parameter in flashphoner.properties

disable_streaming_proxy=true

b) when playing the stream from iOS Safari explicitly specify width and height, for example:

session.createStream({constraints:{audio:true,video:{width:320,height:240}}}).play();