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Audio duration returns NaN

Accessing an HTML5 audio element (a .ogg file) with JavaScript in Chrome. The file does play properly, yet somehow it will not recognize the duration.
I just cribbed this code: https://www.w3schools.com/jsref/prop_audio_duration.asp (I know w3schools isn't great, but it seems like something else is the problem...)
var x = document.getElementById("testTone").duration;
console.log("duration:"+x); // duration:NaN
var y = document.getElementById("testTone");
y.play(); // works!
the element...
<audio controls id="testTone">
<source src="autoharp/tone0.ogg" type="audio/ogg">
</audio>

Add preload="metadata" to your tag to have it request the metadata for your audio object:
<audio controls id="testTone" preload="metadata">
<source src="autoharp/tone0.ogg" type="audio/ogg">
</audio>
In your code, attach an event handler, to set the duration when the metadata has been loaded:
var au = document.getElementById("testTone");
au.onloadedmetadata = function() {
console.log(au.duration)
};

Beside #FrankerZ's solution, you could also do the following:
<audio controls id="testTone">
<source src="https://www.w3schools.com/jsref/horse.ogg" type="audio/ogg">
<source src="https://www.w3schools.com/jsref/horse.mp3" type="audio/mpeg">
</audio>
<button onclick="myFunction()">Try it</button>
<script>
function myFunction() {
var x = document.getElementById("testTone").duration;
console.log("duration:" + x); // duration:NaN
var y = document.getElementById("testTone");
y.play(); // works!
}
</script>

you can try this..hope it will work i used this in 'timeupdate' event as i was getting same NaN error.
var x = document.getElementById("testTone").duration;
if(x){
console.log("duration:"+x);
}

Cycle through audio using js

I'm trying to use a button to change the audio track to 1 of 2 being played in the browser, however, the method I found switches to the second track but doesn't change the audio played afterwards, it only restarts the second track. Here's my code:
function loadSong(){
var player=document.getElementById('player');
var source1=document.getElementById('player');
var source2=document.getElementById('player');
source1.src='/audio/mac+.mp3';
source2.src='/audio/mac-slowed.mp3';
player.load(); //just start buffering (preload)
player.play(); //start playing
}
HTML
<audio id="player" autoplay="autoplay" preload="auto" loop="loop">
<source id="source1" src="/audio/mac+.mp3" type="audio/mpeg">
<source id="source2" src="" type="audio/mpeg">
</audio>
<button onclick='loadSong()'>Switch the Music!</button>

Based on the information you provided in your original inquiry, this is most likely the best fit for you. Attached is a working JSFiddle for you review. You will need to update the src files with your own locally stored files.
HTML:
<audio id="source1" autoplay="autoplay" loop="loop" src='http://www.stephaniequinn.com/Music/Allegro%20from%20Duet%20in%20C%20Major.mp3'></audio>
<audio id="source2" loop="loop" src='http://www.stephaniequinn.com/Music/Pachelbel%20-%20Canon%20in%20D%20Major.mp3'></audio>
<button id="player">Switch the music to track # 2</button>
Javascript:
var player = document.getElementById('player');
var source1 = document.getElementById('source1');
var source2 = document.getElementById('source2');
player.onclick = function() {
curTrack = this.innerHTML.replace(/Switch the music to track # /, "");
if (curTrack == "1") {
nextTrack = "2";
source1.play();
source2.pause();
source2.currentTime = 0;
} else {
nextTrack = "1";
source2.play();
source1.pause();
source1.currentTime = 0;
}
this.innerHTML = "Switch the music to track # " + nextTrack;
}

You are overwriting the #player element look at your code you are saving the same selector to source1 and source 2 so change the selector of source one to source1 and source2

link 4 video element to one source [duplicate]

I currently have 2 video elements on my html-page.
Both embed exactly the same .mp4 video from the same URL.
Is there any way to tell the browser to duplicate the rendered video from the first video element instead of letting the browser download both videos?
You can cleary see that the two videos are loaded seperated as they have a different buffering time before playback sometimes and the videos dont play synchronized everytime.
My Code:
<video autoplay id="previewVideo" data-videoid="JYpUXXD4xgc">
<source src="video.php?videoid=JYpUXXD4xgc" type="video/mp4"/>
</video>
<video autoplay id="bigVideo" data-videoid="JYpUXXD4xgc">
<source src="video.php?videoid=JYpUXXD4xgc" type="video/mp4"/>
</video>

This can be done in some very easy steps via Javascript and the Canvas Element:
HTML:
<video autoplay id="previewVideo" data-videoid="JYpUXXD4xgc">
<source src="video.php?videoid=JYpUXXD4xgc" type="video/mp4"/>
</video>
<canvas id="bigVideo"></canvas>
JavaScript:
document.addEventListener('DOMContentLoaded', function() {
var v = document.getElementById('previewVideo');
var canvas = document.getElementById('bigVideo');
var context = canvas.getContext('2d');
var cw = Math.floor(canvas.clientWidth);
var ch = Math.floor(canvas.clientHeight);
canvas.width = cw;
canvas.height = ch;
v.addEventListener('play', function() {
updateBigVideo(this, context, cw, ch);
}, false);
}, false);
function updateBigVideo(v, c, w, h) {
if (v.paused || v.ended) return false;
c.drawImage(v, 0, 0, w, h);
setTimeout(updateBigVideo, 20, v, c, w, h);
}
The canvas fetches the image of the video and displays it again on the BigVideo.
The updateBigVideo() function is called every 20ms, resulting in a framerate of about 50 FPS.
Read more

First, make the <video> element using JavaScript and then put it in the places you want.
var video1 = document.createElement("video");
video1["data-videoid"] = "JYpUXXD4xgc";
var sourceElem = document.createElement("source");
sourceElem.src = "video.php?videoid=JYpUXXD4xgc";
sourceElem.type = "video/mp4";
video1.appendChild(sourceElem);
var video2 = video1.cloneNode(true); //This makes a copy of the element, but makes sure it's not treated as the same element. This means you can add video1 AND this _different_ element to the document. However, unfortunately, everything still needs to get loaded again. I think this is the easiest way to copy an element over, though.
video2.id = "bigVideo";
video1.id = "previewVideo";
document.addEventListener("DOMContentLoaded", function() {
//Now put video1 and video2 where you want.
});

Experimental feature of interest:
<video id="vid" src="test.mp4" autoplay loop muted></video>
<div style="background:-moz-element(#vid); background-size: cover; width: 1280px; height: 720px; "></div>
(firefox only and with -moz- prefix as of 2023)
https://developer.mozilla.org/en-US/docs/Web/CSS/element
https://w3c.github.io/csswg-drafts/css-images-4/#element-notation

A simple solution can be to add a value to the end of the url with #anything
Since you are loading the video in one video element and want to load it again in a different video element, you can arrange it like below with a unique url:
<video autoplay id="mainVideo">
<source src="video.php?videoid=JYpUXXD4xgc&item=1" type="video/mp4"/>
</video>
<video autoplay id="previewVideo">
<source src="video.php?videoid=JYpUXXD4xgc&item=2" type="video/mp4"/>
</video>

Most Optimal solution
let videoPlayCount = 1;
let video = document.getElementById('amplify-mould-video');
video.addEventListener('ended',videoHandler,false);
function videoHandler() {
if(videoPlayCount < 2){
videoPlayCount++;
video.play();
}else{
video.pause();
video.removeEventListener('ended',videoHandler)
}
}
<video id="video" muted="" autoplay="" controls>
<source src="#" type="video/mp4">
</video>

Play multiple audio files sequentially or randomly in background using HTML5 and javascript

I am trying to play 3 audio files (with the possibility of more later) that run in the background. At this point I am simply trying to play them sequentially and have it loop back to the first audio file when the last is played. I believe I have tried almost every solution or combination of functions and I just can't get it to work. I run into one of two problems:
If I try using repetition with each audio stored in the array, the page will successfully play the first then tries to play the next two simultaneously, rather than sequentially. And it certainly does not go back to the first. Furthermore, if you notice in my html, I have a seperate ID for each player. Would it be better to put them all in the sample player ID?
jQuery(document).ready(function (){
var audioArray = document.getElementsByClassName('playsong');
var i = 0;
var nowPlaying = audioArray[i];
nowPlaying.load();
nowPlaying.play();
while(true){
$('#player').on('ended', function(){
if(i>=2){
i=0;
}
else{
i++;
}
nowPlaying = audioArray[i];
nowPlaying.load();
nowPlaying.play();
});
}
});
On the other hand, I can play each sequentially but each play needs to be hardcoded for and I cannot loop back to the first
jQuery(document).ready(function (){
var audioArray = document.getElementsByClassName('playsong');
var i = 0;
var nowPlaying = audioArray[i];
nowPlaying.load();
nowPlaying.play();
$('#player').on('ended', function(){
// done playing
//alert("Player stopped");
nowPlaying = audioArray[1];
nowPlaying.load();
nowPlaying.play();
$('#player2').on('ended', function(){
nowPlaying = audioArray[2];
nowPlaying.load();
nowPlaying.play();
});
});
});
Here is my html
<audio id="player" class = "playsong">
<source src="1.mp3" />
</audio>
<audio id="player2" class = "playsong">
<source src="2.mp3" />
</audio>
<audio id="player3" class = "playsong">
<source src="3.mp3" />
</audio>
I am not terribly familiar with javascript, I am wondering if there is another event trigger function built into JS that I am not using? Some help is greatly appreciated.

HTML
<audio id="song-1" preload class="songs">
<source src="1.mp3" type="audio/mpeg" />
</audio>
<audio id="song-2" preload class="songs">
<source src="2.mp3" type="audio/mpeg" />
</audio>
<audio id="song-3" preload class="songs">
<source src="3.mp3" type="audio/mpeg" />
</audio>
<audio id="song-4" preload class="songs">
<source src="4.mp3" type="audio/mpeg" />
</audio>
JS
jQuery(document).ready(function (){
var audioArray = document.getElementsByClassName('songs');
var i = 0;
audioArray[i].play();
for (i = 0; i < audioArray.length - 1; ++i) {
audioArray[i].addEventListener('ended', function(e){
var currentSong = e.target;
var next = $(currentSong).nextAll('audio');
if (next.length) $(next[0]).trigger('play');
});
}
});

use webkit-playsinline in javascript

How do I use webkit-playsinline in javascript instead of in html5 video tag? I want to use it just like using video tag control/autoplay attribute in javascript or if you guys have any other method that is working? I'm working on a PhoneGap iOS app that stream video.
Below is some approach that I have tried but none are working:
videoPlayer.WebKitPlaysInline = "webkit-playsinline";
videoPlayer.WebKitPlaysInline = "WebKitPlaysInline";
videoPlayer.webkit-playsinline = "webkit-playsinline";
videoPlayer.WebKitPlaysInline = "true";
videoPlayer.WebKitPlaysInline = true;
videoPlayer.webkit-playsinline = "true";
videoPlayer.webkit-playsinline = true;
My current code(js):
function loadPlayer() {
var videoPlayer = document.createElement('video');
videoPlayer.controls = "controls";
videoPlayer.autoplay = "autoplay";
videoPlayer.WebKitPlaysInline = true;
document.getElementById("vidPlayer").appendChild(videoPlayer);
nextChannel();
}
My current code(html):
<body onload="loadPlayer(document.getElementById('vidPlayer'));"><!-- load js function -->
<li><span class="ind_player"><div id="vidPlayer"></div></span></li><!-- video element creat here -->
Any helps are much appreciate. Thanks.

You can do this without jQuery:
var videoElement = document.createElement( 'video' );
videoElement.setAttribute('webkit-playsinline', 'webkit-playsinline');
You have to activate this functionality in your iOs application's WebView :
webview.allowsInlineMediaPlayback = true;
You can check this post for more details:
HTML5 inline video on iPhone vs iPad/Browser

You need to attach it to the video element and set it as video's attribute
such as :
<video class="" poster="" webkit-playsinline>
<source src="" type="video/ogg" preload="auto">
<source src="" type="video/mp4" preload="auto">
</video>
so you could do (with jQuery) :
$('video').attr('webkit-playsinline', '');