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Audio file won't play when hovering over image - until a click event takes place on page [duplicate]

I'm trying to get a small sound file to play automatically using an tag and javascript to initiate it.
<audio id="denied" preload="auto" controls="false">
<source src="sound/denied.wav" />
</audio>
And then through javascript, at the appropriate time:
$('#denied')[0].play()
Works fine on Chrome on my desktop. In Android 4.1.1, the sound will not play, unless I hit "play" on the HTML5 audio controls before javascript attempts to play it.
So basically the Android browser (stock or Dolphin) will not play the audio unless the user initiates it at some point before the javascript. Is this intended? Is there any way around this?

Well, for my purposes, here's what I did:
Luckily, before the user can trigger the behavior to start audio, they have to click a button. I set the volume of the element to 0.0, and have it "play" when they click this button.
After the sound is played silently, I simply set the volume property back to 1.0, and it plays without user intervention just fine.

In my case this was an easy solution:
https://stackoverflow.com/a/28011906/4622767
Copy & paste this in your chrome:
chrome://flags/#autoplay-policy
My web app has many page reload so I can't force the user to press a button every time; but it is for internal usage, so I can force the users to use chrome and configure that option.

I know that in mobile safari any javascript call to play() must be in the same call stack as a user initialted click event. Spoofing the the click with a javascript trigger won't work either.
On my nexus 7 I can confirm that unless the javascript was triggered by a user click, it does not play.

The main issue is that sound (on iOS and Android) must be triggered by a user click. My workaround was very simple. Tie the audio.play() to a click event listener and then immediately pause it. From that point and on the sound works perfect.
var myAudio = new Audio('assets/myAudio.mp3');
...
button.addEventListener("click", function() {
myAudio.play();
myAudio.pause();
...
});

Here is a blog-post on the reason and how to overcome it by loading all the audio files on first user interaction and play them later in programmed manner: https://blog.foolip.org/2014/02/10/media-playback-restrictions-in-blink/ Adopting this approach a small javascript module is available on GitHub https://github.com/MauriceButler/simple-audio
I tried this simple approach on my own - worked seamlessly & great!

Luckily for me the html5 app I'm working on only needs to work in Android 4.1, but if you're trying to make something cross-platform you'll need to adapt this slightly. Neither setting volume to 0.0 then back or autoplay on the control worked for me. I also tried muted and that didn't work either. Then I thought, what if I set the duration and only play a miniscule amount of the file? Here's yet another hacked-together script that actually did work:
function myAjaxFunction() {
clearTimeout(rstTimer); //timer that resets the page to defaults
var snd=document.getElementById('snd');
snd.currentTime=snd.duration-.01; //set seek position of audio near end
snd.play(); //play the last bit of the audio file
snd.load(); //reload file
document.getElementById('myDisplay').innerHTML=defaultDisplay;
var AJAX=new XMLHttpRequest(); //won't work in old versions of IE
sendValue=document.getElementById('myInput').value;
AJAX.open('GET', encodeURI('action.php?val='+sendValue+'&fn=find'), true);
AJAX.send();
AJAX.onreadystatechange=function() {
if (AJAX.readyState==4 && AJAX.status==200) {
document.getElementById('myDisplay').innerHTML=AJAX.responseText;
if (document.getElementById('err')) { //php returns <div id="err"> if fail
rstTimer = setTimeout('reset()', 5000); //due to error reset page in 5 seconds
snd.play(); //play error sound
document.getElementById('myInput').value=''; //clear the input
}
}
}
}

You don't need JavaScript for autoplay, and I see several issues in your code:
<audio id="denied" preload="auto" controls="false">
<source src="sound/denied.wav" />
</audio>
I'd change it to (in HTML5 you don't need attribute="value" syntax in some cases, that's for XHTML):
<audio id="denied" autobuffer controls autoplay>
<source src="sound/denied.wav" />
</audio>
play!
In iOS autoplay is disabled, you need to click play button or put a user click event on custom controls like this with JavaScript:
var audio = document.getElementById('denied');
var button = document.getElementById('play-button');
button.addEventListener('click',function(){
audio.play();
});
or with jQuery:
$('#play-button').click(function(){ audio.play(); });}
Edit
Keep in mind that HTML5 is pretty recent technology (at least some functionalities), so browser compatibility and functionality changes every once in a while.
I encourage everybody to keep informed about the current status, as sometimes things start to be less hack-dependant, or the other way around.
A good starting point: http://caniuse.com/#feat=audio (check the tabs at the bottom).
Also for a global audio solution I recommend using SoundManager2 JS library

I met the same problem in my app. My application usage scenario was like this:
click the button to show a table with information (user action)
show the table and refresh data in it by AJAX
play sound when data has been changed
Fortunately I had the user action (step 1) so I was able to "initiate" the sound by it and then play it by javascript without the user action needed. See the code.
HTML
<audio id="kohoutAudio">
<source src="views/images/kohout.mp3">
</audio>
<button id="btnShow">Show table</button>
Javascript
$("#btnShow").click(function () {
//some code to show the table
//initialize the sound
document.getElementById('kohoutAudio').play();
document.getElementById('kohoutAudio').pause();
});
function announceChange(){
document.getElementById('kohoutAudio').play();
};

It happened to me too. Here's how I hacked this:
I set the audio to autoplay and set the vol to 0.
When I need it to play, I use the load() method and it will autoplay.
It's a light mp3 file and it plays every one hour/two hour, so this works fine for me.

Check if Hulu is Playing in Applescript/Javascript

I use BetterTouchTool to run Applescripts on my Macbook Pro touch bar to navigate Netflix and YouTube. I just subscribed to Hulu, so I'm trying to make the scripts work for that as well. I know how to pause the player—I tell the tab Hulu is playing in to run this Javascript:
execute javascript "document.getElementsByClassName('controls__playback-button keep-mouse-active controls__playback-button--playing')[0].click()"
Resuming is similar:
execute javascript "document.getElementsByClassName('controls__playback-button keep-mouse-active controls__playback-button--paused')[0].click()"
What I need to do is check whether or not Hulu is currently playing video. I'm not familiar with Javascript or HTML, but what I think I need to do is use
set huluState to execute javascript "xyz"
to check if the "PLAY" thingy is there in this class in the Hulu Player:
<div class="controls__playback-button-playing-tip button-tool-tips">PLAY</div>
Then I would use
if huluState = "PLAY" then
return "Playing"
else if huluState = "PAUSE" then
return "Paused"
end if
to determine what shows up on the BTT button and a similar snippet of code to either play or pause.
TL;DR: I need to get the "PLAY" or "PAUSE" from the class within the Hulu player with Javascript.

PHP and JS to read if audio streaming is broken from HTML5

Right now I have a very basic HTML5 Audio player that play from webradio.
I use a old iPad to play the music but also to show some information from a webpage. The problem is that is happen sometime the wifi and the old iPad does not like to stay connect so it disconnect and reconnect and then the player stop play the webradio. I need somehow a script that notice in real time or every 1 min if the radio is not running and restart the player for me. I guess I can use Javascript but have search a Little and not find any good idea and it also have to work in Chrome. It looks that some javaScript does not work in specific webbrowser

Basically, your <audio> element will dispatch an error event. Just listen for that and then retry. You could also listen to the progress event to see when it starts receiving again and then call play from there. It'd be something roughly like this:
const audio = getAudioElement();
audio.addEventListener('error', () => { playing = false; /* handle error */ });
audio.addEventListener('progress', () => {
if (!playing) {
audio.play();
playing = true;
}
});

HTML5 Video textTracks - Event for Mode Change

I am attempting to build a standard HTML5 video player that supports closed captioning through the <track> element and WebVTT. My goal for this player is to not have to build a custom control UI, but rather rely on the default controls provided by the browser/device.
In order to comply with FCC regulations regarding closed captioning, I am also building a menu with caption formatting options - color, size, opacity, etc. One of the options I would like to include is a toggle for captions off and on, which will be especially useful in a browser like Firefox where the CC button does not exist in the default controls.
I have everything working properly, except for one issue I can not seem to figure out. While using my custom toggle to turn on or off captions, the CC button on the default video controls will also toggle; however, I cannot get this to work the opposite way.
I am looking for some sort of event that gets triggered when the default CC button is pressed so that I can check the showing/hidden/disabled mode of the video textTracks and then update my custom toggle accordingly. Does such an event exist? Is there any way to remove just the CC button from the default controls while leaving the rest? I would hate to have to build a completely custom UI for the player just for this one issue.
Edit 1: Here is a jsFiddle for an example.
http://jsfiddle.net/6z5e37h6/
<div class="htmlVid">
<video width="640" height="360" controls="controls" id="vid">
<source type="video/mp4" src="http://clips.vorwaerts-gmbh.de/VfE_html5.mp4"></source>
</video>
</div>
<label>Captions:</label>
<input onclick="capToggle('off');" type="radio" name="captions" checked="checked" />Off
<input onclick="capToggle('on');" type="radio" name="captions" />On
<script>
var vid = document.getElementById('vid');
var track = vid.addTextTrack('subtitles', 'test', 'en');
var capToggle = function (val) {
if (val == 'on') {
track.mode = 'showing';
} else {
track.mode = 'hidden';
}
}
</script>
As you can see (viewing on Chrome) if you select the captions "on" radio button, the captions will turn on and the default CC button on the default controls will activate (turn opaque). What I am looking for is some way to know that a user clicked the default CC button so that I can automatically update the radio button to reflect the current state.
I would rather not have a regular interval constantly running to check this state, especially with all the other scripts I plan to have running. I know there is an "oncuechange" event for when a new caption shows up, but I was wondering if there was a better way to check right away, rather than have to wait a few seconds potentially to update the value.

Click event not triggering over youtube iframe in mobile safari

I’d like to place interaction controls above a youtube iframe video, and I got it working quite OK by just adding wmode=opaque as arguments and then position the elements absolute above the iframe.
My problem is that on mobile safari - the controls work fine first, but when I return from the fullscreen video, they are all disabled. It works fine on desktop though.
The HTML is basically:
<iframe src="http://www.youtube.com/embed/[ID]?wmode=opaque"></iframe>
<button id="btn">Click me</button>
And then the button is positioned absolute above the iframe.
For a demo, please visit this fiddle using your mobile safari: http://jsfiddle.net/SwGH5/embedded/result/
You’ll see that the button yields an alert when clicked. Now, play the video and click "done". Then try to click the button again...
If the movie was embedded using the <video> tag I could listen for a fullscreen-end event and do something, but now I’m stuck...
Here’s the fiddle: http://jsfiddle.net/SwGH5

So I played around with the iframe API a bit and found a solution. It's kind of hacky... but not really. When a user clicks on the video to play it, the document.activeElement becomes the iframe. When the user clicks the "done" button, the document.activeElement === document.body. So when the video starts playing, we periodically check to see if the active element returns to the body. At that point, the only solution I found was to redraw the iframe. In the example, I destroy() the video and recreate it using the iframe API. I also tried cloning the iframe and replacing it with success (I left that code there so you could see it):
http://jsfiddle.net/ryanwheale/SwGH5/105/
It's not the best solution, but it works. Also, to give an explanation of what [I think] is happening - iOS hijacks any video content (Safari or Chrome) and plays it using the native video player. Any type of OS functionality like this takes place "over" the browser if you will - higher than any z-index... completely outside the browser. When the user clicks "done" the native player kind of zooms out as if it is re-implanting itself on the page. My best guess is that the native player is still hanging out "over" the browser... thus making anything underneath it inaccessible. The fact that the button appears to be on top is just an anomaly... for lack of better description.

EDIT: Ryan Wheale's solution is a better workaround to this problem and will work in most cases.
From Apple’s documentation:
On iOS-based devices with small screens—such as iPhone and iPod touch—video always plays in fullscreen mode, so the canvas cannot be superimposed on playing video. On iOS-based devices with larger screens, such as iPad, you can superimpose canvas graphics on playing video, just as you can on the desktop.
Same goes for a "played video" either. This article clearly states it's not possible.
Workaround:
You could detach and re-attach the iframe element on webkitfullscreenchange. But it won't work for a foreign iframe. Browser will not allow you to manipulate iframe DOM bec. of the cross-domain policy. And even if it did, you could only hide the video overlay to reach your button anyway.
So, the only solution is watching for YT.PlayerState.ENDED state via YouTube iFrame API and then destroying and re-creating the player. But don't worry it plays smooth.
window.onYouTubeIframeAPIReady = function () {
var video = {
player: null,
create: function () {
// first destroy if we already have the player
if (video.player) { video.player.destroy(); }
// create the player
video.player = new YT.Player('ytp', {
videoId: '9u_hp7zPir0',
width: '620',
height: '290',
events: {
'onStateChange': video.onStateChange
}
});
},
onStateChange: function (event) {
// YT.PlayerState.ENDED » exiting full screen
if (event.data === 0) { video.create(); }
}
};
video.create();
};
Here is the working fiddle.

If you can't get it to work with the regular iframe, you might want to consider using mediaelement.js - which can wrap the Youtube API in a HTML5 Media API wrapper. That works fine on safari on ios - try the Youtube example at mediaelementjs.com.
All you need to do is to add the mejs js/css and put your youtube video as source in your video tag, here is some example markup taken from mediaelementjs.com:
<script src="jquery.js"></script>
<script src="mediaelement-and-player.min.js"></script>
<link rel="stylesheet" href="mediaelementplayer.css" />
<video width="640" height="360" id="player1" preload="none">
<source type="video/youtube" src="http://www.youtube.com/watch?v=nOEw9iiopwI" />
</video>
Then start the player like so:
jQuery(document).ready(function($) {
$('#player1').mediaelementplayer();
});
If you want to add your button ontop of the mejs player it will work fine, just set the z-index high enough. If you want a regular play button you could also consider styling the existing one that comes with mejs.

By the comments from #CullenJ's answer, possibly it might be due to some problem in iOS device browsers not triggering the click event on iframe elements. In that case, you would have to change from:
document.getElementById('btn').onclick = function() {
alert('clicked');
}
To something like this (as answered by #smnh):
$('#btn').on('click tap touchstart', function() {
alert('clicked');
});