SFMediaStream

A HTML5 media streamer library for playing music, video, or even microphone & camera live streaming with node server. The transmitted data is compressed (depend on the browser media encoder) before being sent to node server, and the latency is configurable.

The default configuration is intended for newer browser. If you want to build 2-way communication for older and newer browser, then you must send streamer encoding information to the presenter before start the communication or using mp4 instead of opus.

Install with CDN link

You can download minified js from this repository or use this CDN link <script type="text/javascript" src='https://cdn.jsdelivr.net/npm/sfmediastream@latest'></script>

If you want to use the old release, please modify the latest into a specific version.

And include it on your project

var presenter = new ScarletsMediaPresenter(...);
var streamer = new ScarletsAudioStreamer(...);

Install with NPM

npm i sfmediastream

And include it on your project

const {MediaPresenter, AudioStreamer, ...} = require('sfmediastream');
var presenter = new MediaPresenter(...);
var streamer = new AudioStreamer(...);

Adding retro-compatibility

In case of the browser doesn't support some codec like audio/wav, audio/webm, or audio/ogg you can to add opus-media-recorder before using the library.

Safari browser actually is partially supported by using this polyfill. It able to stream audio, but is not playable by the browser.

How to use

ScarletsMediaPresenter

This class is used for streaming local media like camera or microphone to the server.

Properties

| Property | Details | | --- | --- | | debug | Set to true for outputting any message to browser console | | mediaRecorder | Return current mediaRecorder that being used | | mediaStream | Return current mediaStream that being used | | mediaGranted | Return true if user granted the recorder | | recordingReady | Return true if the recording was ready | | recording | Return true if currently recording | | destination | Used for connect audio node to the recorder | | options.mimeType | Return mimeType that being used |

// Example for accessing the properties
presenterMedia.debug = true;

Method

|Function|Arguments|Description| |---|---|---| |startRecording|()|Start recording camera or microphone| |stopRecording|()|Stop recording camera or microphone| |connect|(AudioNode)|Connect presenter's stream to audio processing before being recorded and disable direct output| |disconnect|(AudioNode)|Disconnect presenter's stream from audio processing|

Event Listener

onRecordingReady

Callback when the library is ready for recording

presenterMedia.onRecordingReady = function(packet){
    console.log("Header size: " + packet.data.size);
    mySocket.emit('bufferHeader', packet);
};

onBufferProcess

Callback when data buffer is ready to be played

presenterMedia.onBufferProcess = function(packet){
    console.log("Data", packet);
    mySocket.emit('stream', packet);
};

Example

var presenterMedia = new ScarletsMediaPresenter({
    audio:{
        channelCount:1,
        echoCancellation: false
    },/* video:{
        frameRate:15,
        width: 1280,
        height: 720,
        facingMode: (frontCamera ? "user" : "environment")
    } */
}, 1000); // 1sec

presenterMedia.onRecordingReady = function(packet){
    console.log("Recording started!");
    console.log("Header size: " + packet.data.size + "bytes");

    // Every new streamer must receive this header packet
    mySocket.emit('bufferHeader', packet);
}

presenterMedia.onBufferProcess = function(packet){
    console.log("Buffer sent: " + packet[0].size + "bytes");
    mySocket.emit('stream', packet);
}

presenterMedia.startRecording();
presenterMedia.stopRecording();

ScarletsAudioStreamer

This class is used for buffering and playing microphone stream from the server.

// The minimum duration for audio is ~100ms
var audioStreamer = new ScarletsAudioStreamer(1000); // 1sec

Properties

| Property | Details | | --- | --- | | debug | Set to true for outputting any message to browser console | | playing | Return true if playing a stream | | latency | Return current latency | | mimeType | Return mimeType of current streamed media | | outputNode | Will be available when using .connect(AudioNode) |

// Example for accessing the properties
audioStreamer.debug = true;

Method

|Function|Arguments|Description| |---|---|---| |playStream|()|Set this library to automatically play any received buffer| |receiveBuffer|(packetBuffer)|Receive arrayBuffer and play it when last buffer finished playing| |realtimeBufferPlay|(packetBuffer)|Receive arrayBuffer and immediately play it| |stop|()|Stop playing any buffer| |connect|(AudioNode)|Connect the streamer to other AudioNode| |disconnect|(AudioNode)|Disconnect the streamer from any AudioNode|

ScarletsVideoStreamer

This class is used for buffering and playing microphone & camera stream from the server.

Still in experimental mode and have some bug.

// Usually the minimum duration for video is 1000ms
var videoStreamer = new ScarletsVideoStreamer(videoHTML, 1000); // 1sec

Properties

| Property | Details | | --- | --- | | debug | Set to true for outputting any message to browser console | | playing | Return true if playing a stream | | latency | Return current latency | | mimeType | Return mimeType of current streamed media | | outputNode | Will be available when using .connect(AudioNode) |

// Example for accessing the properties
videoStreamer.debug = true;

Method

|Function|Arguments|Description| |---|---|---| |playStream|()|Set this library to automatically play any received buffer| |receiveBuffer|(arrayBuffer)|Receive arrayBuffer and play it when last buffer finished playing| |stop|()|Stop playing any buffer| |audioConnect|(AudioNode)|Connect the streamer to other AudioNode| |audioDisconnect|(AudioNode)|Disconnect the streamer from any AudioNode|

Example

// var audioStreamer = new ScarletsAudioStreamer(1000); // 1sec
var videoStreamer = new ScarletsVideoStreamer(1000); // 1sec
videoStreamer.playStream();

// First thing that must be received
mySocket.on('bufferHeader', function(packet){
    videoStreamer.setBufferHeader(packet);
});

mySocket.on('stream', function(packet){
    console.log("Buffer received: " + packet[0].byteLength + "bytes");
    videoStreamer.receiveBuffer(packet);
});

// Add an effect
var ppDelay = ScarletsMediaEffect.pingPongDelay();

// Stream (source) -> Ping pong delay -> destination
videoStreamer.audioConnect(ppDelay.input);
ppDelay.output.connect(ScarletsMedia.audioContext.destination);

ScarletsMediaPlayer

This class is used for playing video or audio from url.

var mediaPlayer = new ScarletsMediaPlayer(document.querySelector('audio'));

Properties

| Property | Details | | --- | --- | | autoplay | Sets or returns whether the audio/video should start playing as soon as it is loaded | | preload | Sets or returns whether the audio/video should be loaded when the page loads | | loop | Sets or returns whether the audio/video should start over again when finished | | buffered | Returns a TimeRanges object representing the buffered parts of the audio/video | | preload | Sets or returns whether the audio/video should be loaded when the page loads ("none", "metadata", "auto") | | controller | Returns the MediaController object representing the current media controller of the audio/video | | currentTime | Sets or returns the current playback position in the audio/video (in seconds) | | currentSrc | Returns the URL of the current audio/video | | duration | Returns the length of the current audio/video (in seconds) | | ended | Returns whether the playback of the audio/video has ended or not | | error | Returns a MediaError object representing the error state of the audio/video | | readyState | Returns the current ready state of the audio/video | | networkState | Returns the current network state of the audio/video | | paused | Returns whether the audio/video is paused or not | | played | Returns a TimeRanges object representing the played parts of the audio/video | | seekable | Returns a TimeRanges object representing the seekable parts of the audio/video | | seeking | Returns whether the user is currently seeking in the audio/video | | audioOutput | Return audioContext from media source | | videoOutput | Return videoContext from media source | The videoContext still in experimental mode and haven't been implemented.

// Example for accessing the properties
mediaPlayer.preload = "metadata";

Method

|Function|Arguments|Description| |---|---|---| |load|()|Re-loads the audio/video element| |canPlayType|(str)|Checks if the browser can play the specified audio/video type| |speed|(0 ~ 1)|Sets or returns the speed of the audio/video playback| |mute|(boolean)|Sets or returns whether the audio/video is muted or not| |volume|(0 ~ 1)|Sets or returns the volume of the audio/video| |play|()|Starts playing the audio/video| |pause|()|Pauses the currently playing audio/video|

Below also the available method.

prepare

Load media from URL

mediaPlayer.prepare('my.mp3' /*single*/ || /*with fallback*/ ['my.mp3', 'fallback.ogg'], function(){
    mediaPlayer.play();
});

on

Register event callback

mediaPlayer.on('loadedmetadata', function(e){
    // See at the property above
    console.log(e.target.duration);
});

off

Un-register event callback

mediaPlayer.off('abort');

once

Register event callback and remove listener after called

mediaPlayer.once('abort', function(e){
    alert('User aborted the buffer');
});

Available Events

| Event | Details | | --- | --- | | abort | Fires when the loading of an audio/video is aborted | | canplay | Fires when the browser can start playing the audio/video | | canplaythrough | Fires when the browser can play through the audio/video without stopping for buffering | | durationchange | Fires when the duration of the audio/video is changed | | emptied | Fires when the current player is empty | | ended | Fires when the current player is ended | | error | Fires when an error occurred during the loading of an audio/video | | loadeddata | Fires when the browser has loaded the current frame of the audio/video | | loadedmetadata | Fires when the browser has loaded meta data for the audio/video | | loadstart | Fires when the browser starts looking for the audio/video | | pause | Fires when the audio/video has been paused | | play | Fires when the audio/video has been started or is no longer paused | | playing | Fires when the audio/video is playing after having been paused or stopped for buffering | | progress | Fires when the browser is downloading the audio/video | | ratechange | Fires when the playing speed of the audio/video is changed | | seeked | Fires when the user is finished moving/skipping to a new position in the audio/video | | seeking | Fires when the user starts moving/skipping to a new position in the audio/video | | stalled | Fires when the browser is trying to get media data, but data is not available | | suspend | Fires when the browser is intentionally not getting media data | | timeupdate | Fires when the current playback position has changed | | volumechange | Fires when the volume has been changed | | waiting | Fires when the video stops because it needs to buffer the next frame | | playlistchange | Fires when the player starts another playlist |

playlistchange the callback function will get (player, playlist, index) as the arguments.

Video Properties

| Property | Details | | --- | --- | | poster | Specifies an image to be shown while the video is downloading, or until the user hits the play button | | height | Sets the height of the video player | | width | Sets the width of the video player |

// Example for accessing the properties
mediaPlayer.poster = 'url.png';

Properties

audioFadeEffect

Enable fade effect when playing or pausing the sound

mediaPlayer.audioFadeEffect = true;

audioOutput

Can be used to connect the media to other effect or plugin like equalizer

// Create equalizer and pass audio output as equalizer input
var equalizer = ScarletsMediaEffect.equalizer(null, mediaPlayer.audioOutput);

// Connect to final destination
equalizer.output.connect(ScarletsMedia.audioContext.destination);

ScarletsMediaEffect

This feature can be used on every media if you have the media source node as the input. And make sure every node is connected to AudioContext.destination or it will not playable.

The plugins have a function to destroy node connection that aren't being used. So don't forget to destroy your unused effect to clean unused memory.

effect.destroy();

Available Plugin

| Effect | Details | | --- | --- | | Chorus | An effect to make a single voice like multiple voices | | ConReverb | An reverb effect that simulates from other audio source | | CutOff | An cutoff filter that have adjustable width | | Delay | An effect that play the audio back after a period of time | | Distortion | It's.. like.. distortion.. | | DubDelay | Delay with feedback saturation and time/pitch modulation | | Equalizer | Adjustable frequency pass filter | | Fade | Volume fade in and fade out effect | | Flanger | An audio effect by mixing two identical signals together with one signal who get delayed | | Harmonizer | An pitch shift effect which like playing an harmony | | Noise | Noise generator like a radio | | PingPongDelay | Stereo delay effect that alternates each delay between the left and right channels | | Reverb | Configurable reflection effect | | StereoPanner | Can be used to pan an audio stream left or right | | Tremolo | Modulation effect that creates a change in volume |

// Directly connect audio output as an input for ping pong delay plugin
var ppDelay = ScarletsMediaEffect.pingPongDelay(mediaPlayer.audioOutput);

// Create StereoPanner handler
var panner = ScarletsMediaEffect.stereoPanner(/* input [optional] */);
// panner.input (will be available if no input passed on plugin)

// Connect ppDelay output to panner input
ppDelay.output.connect(panner.input);

// Modify the plugin (Still need to be documented)
panner.set(-1); // Left channel

// Connect to final destination
panner.connect(ScarletsMedia.audioContext.destination);

// Visualization
// player.audioOutput -> pingPongDelay -> Panner -> final destination

Playlist

This will be available on current media player

Properties

| Property | Details | | --- | --- | | currentIndex | Return index of current playing media | | list | Return array playlist that are being used | | original | Return original array playlist | | loop | Set this to true if you want to play this playlist again from beginning | | shuffled | Return true if the list was shuffled |

// Example for accessing the properties
console.log('Current playlist count', mediaPlayer.playlist.original.length);

Method

reload

Replace old playlist data

mediaPlayer.playlist.reload([{
    yourProperty:'',
    stream:['main.mp3', 'fallback.ogg']
}, ...]);

add

Add new data to playlist

mediaPlayer.playlist.add({
    yourProperty:'',
    stream:['main.mp3', 'fallback.ogg']
});

remove

Remove original playlist data by index

// mediaPlayer.playlist.original[0]
mediaPlayer.playlist.remove(0);

next

Play next music, this will also trigger playlistchange event

mediaPlayer.playlist.next();

previous

Play previous music, this will also trigger playlistchange event

mediaPlayer.playlist.previous();

play

Play music by index

// mediaPlayer.playlist.list[0]
mediaPlayer.playlist.play(0);

shuffle

Shuffle the playlist

// mediaPlayer.playlist.list
mediaPlayer.playlist.shuffle(true || false);

Contribution

If you want to help in SFMediaStream please fork this project and edit on your repository, then make a pull request to here. Otherwise, you can help with donation via patreon.

Compile from source

After you downloaded this repo you need to install some devDependencies.

$ npm i
$ gulp watch

After you make some changes on /src it will automatically compile into /dist/SFMediaStream.js. Make sure you cleared your cache when doing some experiment.

License

SFMediaStream is under the MIT license.

But don't forget to put the a link to this repository.