Audio.play() not working with iOS user agent - ios

I'm making a playlist app in react, where each Track component in the playlist has and <audio> element:
const AudioPlayer = ({ track }: { track: Track }): JSX.Element => {
const { src, title } = track;
return (
<audio id={"audio_" + title}>
<source src={src} />
Your browser does not support the <code>audio</code> element.
</audio>
);
};
In my redux store, when a user click a Track, I find the audio element associated with the track and use audioElement.play():
const playTrack = (track: Track) => {
//get all the audio elements for all the playlist tracks
allAudioElems.current = tracks
.map((t) => "audio_" + t.title)
.map((id) => document.getElementById(id) as HTMLAudioElement)
.filter((e) => e !== null);
if (allAudioElems.current) {
allAudioElems.current.forEach((element) => {
//if the audio elements id matches the active track title, then play
if (element.id === "audio_" + track.title) {
element.play();
setCurrentAudio(element);
} else {
element.pause();
}
});
}
setCurrentTrack(track.title);
setIsPlayingAction(true);
setIsPlaying(true);
};
This all works fine on desktop for Chrome/Safari/Firefox, but fails on iOS Safari. Enabling controls, or autoPlay doesn't seem to do anything either.
I know that .play() returns a promise, but the error message is very vague when I catch the .play() error:
element.play().then((e)=>{
console.log("played audio!");
}).catch((error)=>{
console.log(error)
});
Gives Error:
Unhandeled Promise Rejection: AbortError: The operation was aborted
So what's one to do to get audio working on iOS?

Related

Twilio Streaming lose GaussianBlurBackgroundProcessor

I tried to set GaussianBlurBackgroundProcessor (I use this post as a starting point but instead of node.js i use *.min.js in a php page). On local video it works but when I connect my video in a room, remote partecipants see my video "clean".
Someone had have my same problem?
I use min version of:
twilio-video.js 2.22.1
twilio-video-processors.js 1.0.2
This is the code:
[...]
const TWVideo = Twilio.Video;
const bg = new Twilio.VideoProcessors.GaussianBlurBackgroundProcessor({
assetsPath: '',
maskBlurRadius: 5,
blurFilterRadius: 25,
});
bg.loadModel();
const localVideo = TWVideo.createLocalVideoTrack().then(track => {
let video = document.getElementById('local-media').firstElementChild;
setProcessor(bg, track);
video.appendChild(track.attach());
$('#local-media').find('video').css('width', '200px');
});
TWVideo.connect(room_token, {
name: roomName
}).then(room => {
window.room = activeRoom = room;
log('Connected to Room '+ roomName);
room.participants.forEach(participantConnected);
room.on('participantConnected', participantConnected);
room.on('participantDisconnected', participantDisconnected);
room.once('disconnected', error => room.participants.forEach(participantDisconnected));
room.on('reconnecting', error => {
assert.equal(room.state, 'reconnecting');
if (error.code === 53001) {
console.log('Reconnecting your signaling connection!', error.message);
}
else if (error.code === 53405) {
console.log('Reconnecting your media connection!', error.message);
}
});
room.on('reconnected', () => {
console.log('Reconnected your signaling and media connections!');
assert.equal(room.state, 'connected');
});
room.on('participantReconnected', remoteParticipant => {
console.log("${remoteParticipant.identity} has reconnected the signaling connection to the Room!");
assert.equals(remoteParticipant.state, 'connected');
})
});
[...]
Thanks!
The issue is that you are creating a local video track and applying the blur to it, but you’re not using that track when you connect to the room. I would create the local video track and audio track first, then apply them to the room when you connect like this:
Video.connect(roomToken, {
name: roomName,
tracks: [localVideo, localAudio]
}).then(…);

Play multiple Audio files on Safari at once

I want to play multiple Audio files simultaneously on iOS .
On the click of a button I create multiple instance of an Audio file and put them into an array.
let audio = new Audio('path.wav')
audio.play().then(() => {
audio.pause();
possibleAudiosToPlay.push(audio);
});
After a while I play them all:
possibleAudiosToPlay.forEach(el => {
el.currentTime = 0;
el.play();
});
While this plays all audio files: When a new one begins it stops the old one. (on iOS)
Apples developer guide says this isn't possible at all with HTML5 Audio:
Playing multiple simultaneous audio streams is also not supported.
But can this be achieved with the Web Audio API?
There isn't anything written about it in Apples developer guide.
Yes you can with Web Audio API. You have to create an AudioBufferSourceNode for each one of your audio sources, since each source can be played only once (you can't stop it and play it again).
const AudioContext = window.AudioContext || window.webkitAudioContext;
const ctx = new AudioContext();
const audioPaths = [
"path/to/audio_file1.wav",
"path/to/audio_file2.wav",
"path/to/audio_file3.wav"
];
let promises = [];
// utility function to load an audio file and resolve it as a decoded audio buffer
function getBuffer(url, audioCtx) {
return new Promise((resolve, reject) => {
if (!url) {
reject("Missing url!");
return;
}
if (!audioCtx) {
reject("Missing audio context!");
return;
}
let xhr = new XMLHttpRequest();
xhr.open("GET", url);
xhr.responseType = "arraybuffer";
xhr.onload = function() {
let arrayBuffer = xhr.response;
audioCtx.decodeAudioData(arrayBuffer, decodedBuffer => {
resolve(decodedBuffer);
});
};
xhr.onerror = function() {
reject("An error occurred.");
};
xhr.send();
});
}
audioPaths.forEach(p => {
promises.push(getBuffer(p, ctx));
});
// Once all your sounds are loaded, create an AudioBufferSource for each one and start sound
Promise.all(promises).then(buffers => {
buffers.forEach(b => {
let source = ctx.createBufferSource();
source.buffer = b;
source.connect(ctx.destination);
source.start();
})
});

Cordova iOS Video tag Local File Source

I have problem playing local video on iOS on my Cordova based app. At the beginning I want to stress out that this problem is happening only when I'm using WKWebView, and if UiWebView is used, video plays fine. This is scenario I have:
-User comes to screen to which video url is passed
-Via FileTransfer I download it to phone and store it at desired location
-Using JS video is loaded to <video> tag and played.
Basically I'm doing everything as described in answer to this SO question.
The problem with UiWebView was that if relative path was set to src, video for some reason couldn't be loaded (no matter which combination I used), so this solution worked great for me, because it is based on this line of code:
entry.toURL()
This returns full path of the downloaded video which is great, at least for the UiWebView.
The problem for WkWebView is that entry.toURL() returns smth. like this:
file:///var/mobile/Containers/Data/Application/3A43AFB5-BEF6-4A0C-BBDB-FC7D2D98BEE9/Documents/videos/Dips.mp4
And WKWebView doesn't work with file:// protocol. Also, neither WKWebView works wit relative paths :(
Can anyone help me to fix this ?
I got this working today with the following but only when deployed to my device in Release mode. When deploying the app in Debug mode to my device it would not work.
iOS 9.3.2
Cordova 4.0.0 (iOS 3.8.0)
Telerik WKWebView Polyfill 0.6.9
Video list load method:
var path = window.cordova.file.documentsDirectory, //iTunes File Sharing directory
href = 'http://localhost:12344/Documents', //WKWebView default server url to documents
list = [];
function fsSuccess(dir) {
var reader = dir.createReader();
reader.readEntries(function (entries) {
for (var i = 0; i < entries.length; i++) {
list.push({ name: entries[i].name, path: href + entries[i].fullPath });
}
});
}
function fsError(error) {
console.log('error', error)
}
window.resolveLocalFileSystemURL(path, fsSuccess, fsError);
Video list click handler:
var video = $('#video')[0],
source = $('#source');
function play(index) {
source.attr('src', list[index].path);
video.load();
video.play();
}
Video player markup:
<video id="video" autoplay controls loop webkit-playsinline>
<source id="source" type="video/mp4" />
</video>
I was banging my head on my desk a la Ren Hoek while debugging until I attempted a release buid and it worked.
Sample snippet that uses cordova file opener plugin to open the download file from device.(Not tested in WKWebView though)
var fileTransfer = new FileTransfer();
var cdr;
if (sessionStorage.platform.toLowerCase() == "android") {
window.resolveLocalFileSystemURL(cordova.file.externalRootDirectory, onFileSystemSuccess, onError);
} else {
// for iOS
window.requestFileSystem(LocalFileSystem.PERSISTENT, 0, onFileSystemSuccess, onError);
}
function onError(e) {
navigator.notification.alert("Error : Downloading Failed");
};
function onFileSystemSuccess(fileSystem) {
var entry = "";
if (sessionStorage.platform.toLowerCase() == "android") {
entry = fileSystem;
} else {
entry = fileSystem.root;
}
entry.getDirectory("Cordova", {
create: true,
exclusive: false
}, onGetDirectorySuccess, onGetDirectoryFail);
};
function onGetDirectorySuccess(dir) {
cdr = dir;
dir.getFile(filename, {
create: true,
exclusive: false
}, gotFileEntry, errorHandler);
};
function gotFileEntry(fileEntry) {
// URL in which the pdf is available
var documentUrl = "http://localhost:8080/testapp/test.pdf";
var uri = encodeURI(documentUrl);
fileTransfer.download(uri, cdr.nativeURL + "test.pdf",
function(entry) {
// Logic to open file using file opener plugin
openFile();
},
function(error) {
navigator.notification.alert(ajaxErrorMsg);
},
false
);
};
function openFile() {
cordova.plugins.fileOpener2.open(
cdr.nativeURL + "test.pdf",
"application/pdf", //mimetype
{
error: function(e) {
navigator.notification.alert("Error Opening the File.Unsupported document format.");
},
success: function() {
// success callback handler
}
}
);
};

How to get webcam video feed in a firefox addon?

I am currently developing an addon where the requirement is to capture the webcam video. I did some testing and noticed that navigator.mediaDevices.getUserMedia() is available within panel and hence have written the following content script for the panel to get webcam video feed from addon.
var mediastream;
var mediarecorder;
// Get the instance of mediaDevices object to use.
navigator.mediaDevices = navigator.mediaDevices || ((navigator.mozGetUserMedia || navigator.webkitGetUserMedia) ? {
getUserMedia: function(c) {
return new Promise(function(y, n) {
(navigator.mozGetUserMedia ||
navigator.webkitGetUserMedia).call(navigator, c, y, n);
});
}
} : null);
function startVideoCapture(width, height, framerate) {
// Check if the browser supports video recording
if (!navigator.mediaDevices) {
return;
}
// Lets initialize the video settings for use for our video recording session
var constraints = { audio: false, video: { width: 640, height: 320, framerate: 25 } };
// Make request to start video capture
navigator.mediaDevices.getUserMedia(constraints)
.then(function(stream) {
// Lets initialize the timestamp for this video
var date = new Date();
var milliseconds = "000" + date.getMilliseconds();
var timestamp = date.toLocaleFormat("%Y-%m-%d %H:%M:%S.") + milliseconds.substr(-3);
// Lets make the stream globally available so that we will be able to control it later.
mediastream = stream;
// Lets display the available stream in the video element available inside the panel.
var video = document.querySelector('video');
video.src = window.URL.createObjectURL(stream);
video.onloadedmetadata = function(e) {
video.play();
};
// We are not here to just show the video to screen. Lets get a media recorder to store the video into memory
mediarecorder = new MediaRecorder(stream);
// Lets decide what to do with the recorded video once we are done with the recording
mediarecorder.ondataavailable = function(evt) {
// recorded video will be available as a blob in evt.data object.
// The only way to use it properly is through FileReader Object
var reader = new FileReader();
// Lets decide what we are going to do with the data that we will read from blob
reader.onloadend = function() {
// create a video object containing the timestamp and the binary video string
var videoObject = new Object();
videoObject.timestamp = timestamp;
videoObject.video = reader.result;
// send the video to the main script for safe keeping
self.port.emit("videoAvailable", videoObject);
}
// instruct the FileReader to start reading the blob
reader.readAsBinaryString(evt.data);
}
// Lets start the video capture
mediarecorder.start();
})
.catch(function(err) {
self.port.emit("VideoError", err);
});
}
function stopVideoCapure(){
if (mediarecorder !== undefined && mediarecorder !== null) {
mediarecorder.stop();
}
if (mediastream !== undefined && mediastream !== null) {
mediastream.stop();
}
}
function updateVideoSettings(settings){
stopVideoCapture();
startVideoCapture(settings.width, settings.height, settings.framerate);
}
self.port.on("VideoPreferenceUpdated", updateVideoSettings);
// Start video capture
startVideoCapture(self.options.width, self.options.height, self.options.framerate);
Now the problem here is the code is perfectly working when from a webpage i.e. if I save the open the panel.html file directly in the browser with proper adjustment of self.options and self.port lines. But when I am using the code in the contentscript for panel in my addon, I am getting the following error
JavaScript error: resource:///modules/webrtcUI.jsm, line 186: TypeError: stringBundle is undefined
Now that is an error from the inbuilt jsm module in firefox. Is there a way I can get past that error or any other way to get webcam video feed in my addon?
Thanks

Distorted audio in iOS 7.1 with WebAudio API

On iOS 7.1, I keep getting a buzzing / noisy / distorted sound when playing back audio using the Web Audio API. It sounds distorted like this, in place of normal like this.
The same files are fine when using HTML5 audio. It all works fine on desktop (Firefox, Chrome, Safari.)
EDIT:
The audio is distorted in the iOS Simulator versions iOS 7.1, 8.1, 8.2. The buzzing sound often starts before I even playback anything.
The audio is distorted on a physical iPhone running iOS 7.1, in both Chrome and Safari.
The audio is fine on a physical iPhone running iOS 8.1, in both Chrome and Safari.
i.e.: the buzzing audio is on iOS 7.1. only.
Howler.js is not the issue. The problem is still there using pure JS like so:
var context;
var sound;
var extension = '.' + ( new Audio().canPlayType( 'audio/ogg' ) !== '' ? 'ogg' : 'mp3');
/** Test for WebAudio API support **/
try {
// still needed for Safari
window.AudioContext = window.AudioContext || window.webkitAudioContext;
// create an AudioContext
context = new AudioContext();
} catch(e) {
// API not supported
throw new Error( 'Web Audio API not supported.' );
}
function loadSound( url ) {
var request = new XMLHttpRequest();
request.open( 'GET', url, true );
request.responseType = 'arraybuffer';
request.onload = function() {
// request.response is encoded... so decode it now
context.decodeAudioData( request.response, function( buffer ) {
sound = buffer;
}, function( err ) {
throw new Error( err );
});
}
request.send();
}
function playSound(buffer) {
var source = context.createBufferSource();
source.buffer = buffer;
source.connect(context.destination);
source.start(0);
}
loadSound( '/tests/Assets/Audio/En-us-hello' + extension );
$(document).ready(function(){
$( '#clickme' ).click( function( event ) {
playSound(sound);
});
}); /* END .ready() */
A live version of this code is available here: Web Audio API - Hello world
Google did not bring up any result about such a distorted sound issue on iOS 7.1.
Has anyone else run into it? Should I file a bug report to Apple?
I believe the issue is caused due to resetting the audioContext.sampleRate prop, which seem to happen after the browser/OS plays something recorded in a different sampling rate.
I've devised the following workaround, which basically silently plays a short wav file recorded in the sampling rate that the device currently does playback on:
"use strict";
var getData = function( context, filePath, callback ) {
var source = context.createBufferSource(),
request = new XMLHttpRequest();
request.open( "GET", filePath, true );
request.responseType = "arraybuffer";
request.onload = function() {
var audioData = request.response;
context.decodeAudioData(
audioData,
function( buffer ) {
source.buffer = buffer;
callback( source );
},
function( e ) {
console.log( "Error with decoding audio data" + e.err );
}
);
};
request.send();
};
module.exports = function() {
var AudioContext = window.AudioContext || window.webkitAudioContext,
context = new AudioContext();
getData(
context,
"path/to/short/file.wav",
function( bufferSource ) {
var gain = context.createGain();
gain.gain.value = 0;
bufferSource.connect( gain );
gain.connect( context.destination );
bufferSource.start( 0 );
}
);
};
Obviously, if some of the devices have different sampling rates, you would need to detect and use a specific file for every rate.
it looks like iOS6+ Safari defaults to a sample rate of 48000. If you type this into the developer console when you first open mobile safari, you'll get 48000:
var ctx = new window.webkitAudioContext();
console.log(ctx.sampleRate);
Further Reference: https://forums.developer.apple.com/thread/20677
Then if you close the initial context on load: ctx.close(), the next created context will use the sample rate most other browsers use (44100) and sound will play without distortion.
Credit to this for pointing me in the right direction (and in case the above no longer works in the future): https://github.com/Jam3/ios-safe-audio-context/blob/master/index.js
function as of post date:
function createAudioContext (desiredSampleRate) {
var AudioCtor = window.AudioContext || window.webkitAudioContext
desiredSampleRate = typeof desiredSampleRate === 'number'
? desiredSampleRate
: 44100
var context = new AudioCtor()
// Check if hack is necessary. Only occurs in iOS6+ devices
// and only when you first boot the iPhone, or play a audio/video
// with a different sample rate
if (/(iPhone|iPad)/i.test(navigator.userAgent) &&
context.sampleRate !== desiredSampleRate) {
var buffer = context.createBuffer(1, 1, desiredSampleRate)
var dummy = context.createBufferSource()
dummy.buffer = buffer
dummy.connect(context.destination)
dummy.start(0)
dummy.disconnect()
context.close() // dispose old context
context = new AudioCtor()
}
return context
}

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