I have one file HTML just to test play/pause and increase/decrease volume with event listeners in JavaScript. I can't exactly describe the anomaly i'm experiencing. I'm sure there is a logical explanation, but I can't wrap my head around it.
Basically, up and down arrow keys change the volume of the audio. But when I press the keys in some sort of a pattern like - up, up, down, down, up, down, up, down - the count does not follow any mathematical rules :D instead of increasing the volume, it gets decreased by specified value and vice versa.
I'm sure if you are answering this, you know how to, but to test it, just change the name of audio file inside src and drop the same file in the project. Then just load the HTML locally in the browser of your choice and debug it. The current volume will be displayed.
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Audio API</title>
</head>
<body>
<audio>
<source src="njaar.mp3" type="audio/mpeg">
</audio>
<p id="currentVolume"></p>
<script>
var audio;
window.addEventListener('load', init, false);
window.addEventListener("click", playPause, false);
window.addEventListener("keydown", changeVolume, false);
function init() {
audio = document.getElementsByTagName('audio')[0];
audio.play();
}
function playPause() {
if (audio.paused) {
audio.play();
} else {
audio.pause();
}
}
function changeVolume() {
document.getElementById("currentVolume").innerHTML = audio.volume;
// if (audio.volume === 1) {
// document.getElementById("currentVolume").innerHTML = audio.volume;
// }
if (event.key === "ArrowUp") {
try {
audio.volume = audio.volume + 0.05;
} catch (e) {
console.error("Exception: " + e + "has been caught!");
}
}
if (event.key === "ArrowDown") {
try {
audio.volume = audio.volume - 0.05;
} catch (e) {
console.error("Exception: " + e + "has been caught!");
}
}
if (audio.volume < 0.05) {
audio.volume = 0;
}
}
</script>
</body>
</html>
I think it's about the position of
document.getElementById("currentVolume").innerHTML = audio.volume;
You call it at the beginning of the function. That way you show the last update and not the current one.
Put it to the end of the function.
Tips:
add the event as a parameter
think about using += and -=
i had tested your code in my browser firefox 76.0.0. firefox block audio by default, i give it the permission and it worked fine.
image description here]1
This is how my script looks like:
<script>
var obj = document.createElement("audio");
document.body.appendChild(obj);
obj.src = "http://example.com/audios/Kalimba.mp3";
obj.load();
obj.volume = 0.3;
obj.preLoad = true;
obj.controls = true;
$(".testspeech").click(function() {
obj.paused?obj.play():obj.pause()
});
</script>
Then in the HTML I have a button that is meant to play and/or pause the video.
However, when I load the page nothing happens when I click on the play button.
Anything I could have possibly done wrong here?
Here is the HTML:
<button class="testspeech">
play/pause
</button>
As far as I can tell the reason your sound isn't playing is that the src for the actual sound is not valid. I've created a JSFiddle (here) to test it out, and after replacing the sound clip link it works as expected.
$(document).ready(function() {
var obj = document.createElement("audio");
document.body.appendChild(obj);
obj.src = "https://www.kozco.com/tech/piano2.wav";
obj.load();
obj.volume = 0.3;
obj.preLoad = true;
obj.controls = true;
$(".testspeech").on('click', function() {
obj.paused ? obj.play() : obj.pause()
});
});
When I hover my video control bar in Chrome, Safari it shows up. But when I hover that in firefox, it's not showing. I don't know if my js code doesn't support firefox. But when I inspect it in firefox, the controls keep appearing and disappearing. Below is my code. Can anyone help me with this? Thank you.
HTML
<video poster="http://dummyimage.com/320x205/852285/fff" preload="auto">
<source type="video/mp4" src="http://www.w3schools.com/html/movie.mp4" />
</video>
JS
<script src='http://cdnjs.cloudflare.com/ajax/libs/jquery/2.1.3/jquery.min.js'></script>
<script src='http://cdnjs.cloudflare.com/ajax/libs/mediaelement/2.13.1/js/mediaelement.js'></script>
// Video Player
function videoPlayer() {
// Exit full screen when video is done playing
var video = document.getElementsByTagName("video")[0];
video.addEventListener("ended", function(e) {
video.webkitExitFullScreen()
});
var player = $('.video-player'),
controls = player.find('.vid-play-btn-wrap'),
wrapper = player.find('video'),
video = player.find('video').get(0),
isPlaying = false,
settings = {},
media = new MediaElement(video, settings),
$media = $(media);
$media.on('play', _playHandler);
$media.on('pause', _pauseHandler);
$media.on('ended', _endedHandler);
player.click(_togglePlayPause);
player.hover(_mouseOverHandler, _mouseOutHandler);
function _togglePlayPause() {
isPlaying ? media.pause() : media.play();
}
function _mouseOverHandler() {
if(!isPlaying) { return; }
// controls.fadeIn('fast');
}
function _mouseOutHandler() {
if(!isPlaying) { return; }
// controls.fadeOut('fast');
}
function _endedHandler() {
isPlaying = false;
video.load();
controls.show();
}
function _playHandler() {
isPlaying = true;
controls.hide();
}
function _pauseHandler() {
isPlaying = false;
}
$('video').hover(function toggleControls() {
if (this.hasAttribute("controls")) {
this.removeAttribute("controls")
} else {
this.setAttribute("controls", "controls")
}
});
}
you have this in your script:
player.hover(_mouseOverHandler, _mouseOutHandler);
So BOTH functions are executed on hover (which explains the appearing and disappearing). It might be better to create ONE function that contains both things you want in an if/else statement
I am facing an issue while playing audio in chrome when audio.src is not called preceeding to play call. However, firefox plays it alright. Can someone pls suggest? Below is the fiddle link -
http://jsfiddle.net/vn215r2d/1/
One can also find the code over here -
<html>
<head>
<script language="javascript">
var audioo = document.createElement("audio");
function newCall() {
audioo.src = "";
audioo.src = "http://xx.xx.xx.xx:8181/api/captcha/sound";
audioo.play();
}
function playAgain() {
audioo.play(); // doesn't work in chrome :(
}
</script>
</head>
<body>
<button type="button" onClick="newCall()">New Captcha Call</button>
<br>
<button type="button" onClick="playAgain()">Replay Captcha</button>
</body>
</html>
Update
Oh waw, apparently is comes down to the audio.currentTime not being writeable until you rewrite the src. Heres what you can do and it does work:
function newCall() {
audioo.src = "http://xx.xx.xx.xx:8181/api/captcha/sound";
// make all audio attributes writeable again by resetting the src
audioo.src = audio.src;
}
The answer took a bit of googling, but I got it from here: https://stackoverflow.com/a/14850353
Original
I tested on Chrome with resetting the audio position and it worked. Its safest to pause first, but it works either way.
var audioo = document.createElement("audio");
// Lets add an event listener to play when we are ready to start playing
audioo.addEventListener("canplaythrough", function(){
audioo.play();
}, false);
function newCall() {
audioo.src = "";
audioo.src = "http://xx.xx.xx.xx:8181/api/captcha/sound";
}
function playAgain() {
// Let's check if we are ready enough to play
if(audioo.readyState === 4){
audioo.pause(); // first pause
audioo.currentTime = 0; // then reset
audioo.play(); // then play
} else {
// else inform us that we are not ready to play yet.
alert("Audio not ready yet.");
}
}
Here are two fun resources that can help:
MDN:
MediaElement (usefull properties and functions)
MDN:
Media Events (for event listeners)
This question already has answers here:
How to tell if a <video> element is currently playing?
(7 answers)
Closed 1 year ago.
I've looked through a couple of questions to find out if an HTML5 element is playing, but can't find the answer. I've looked at the W3 documentation and it has an event named "playing" but I can't seem to get it to work.
This is my current code:
var stream = document.getElementsByTagName('video');
function pauseStream() {
if (stream.playing) {
for (var i = 0; i < stream.length; i++) {
stream[i].pause();
$("body > header").addClass("paused_note");
$(".paused_note").text("Stream Paused");
$('.paused_note').css("opacity", "1");
}
}
}
It seems to me like you could just check for !stream.paused.
Check my answer at How to tell if a <video> element is currently playing?: MediaElement does not have a property that tells if it is playing or not. But you could define a custom property for it.
Object.defineProperty(HTMLMediaElement.prototype, 'playing', {
get: function(){
return !!(this.currentTime > 0 && !this.paused && !this.ended && this.readyState > 2);
}
})
Now you can use it on video or audio elements like this:
if(document.querySelector('video').playing){
// Do anything you want to
}
Note : This answer was given in 2011. Please check the updated documentation on HTML5 video before proceeding.
If you just want to know whether the video is paused, use the flag stream.paused.
There is no property for a video element in getting its playing status. But there is one event "playing" which will be triggered when it starts to play. An Event called "ended" is also triggered when it stops playing.
So the solution is:
Declare one variable videoStatus.
Add event handlers for different events of video.
Update videoStatus using the event handlers.
Use videoStatus to identify the status of the video.
This page will give you a better idea about video events. Play the video on this page and see how the events are triggered.
http://www.w3.org/2010/05/video/mediaevents.html
jQuery(document).on('click', 'video', function(){
if (this.paused) {
this.play();
} else {
this.pause();
}
});
Add eventlisteners to your media element. Possible events that can be triggered are: Audio and video media events
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8"/>
<title>Html5 media events</title>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
</head>
<body >
<div id="output"></div>
<video id="myVideo" width="320" height="176" controls autoplay>
<source src="http://www.w3schools.com/tags/mov_bbb.mp4" type="video/mp4">
<source src="http://www.w3schools.com/tags/mov_bbb.ogg" type="video/ogg">
</video>
<script>
var media = document.getElementById('myVideo');
// Playing event
media.addEventListener("playing", function() {
$("#output").html("Playing event triggered");
});
// Pause event
media.addEventListener("pause", function() {
$("#output").html("Pause event triggered");
});
// Seeking event
media.addEventListener("seeking", function() {
$("#output").html("Seeking event triggered");
});
// Volume changed event
media.addEventListener("volumechange", function(e) {
$("#output").html("Volumechange event triggered");
});
</script>
</body>
</html>
Best approach:
function playPauseThisVideo(this_video_id) {
var this_video = document.getElementById(this_video_id);
if (this_video.paused) {
console.log("VIDEO IS PAUSED");
} else {
console.log("VIDEO IS PLAYING");
}
}
I encountered a similar problem where I was not able to add event listeners to the player until after it had already started playing, so #Diode's method unfortunately would not work. My solution was check if the player's "paused" property was set to true or not. This works because "paused" is set to true even before the video ever starts playing and after it ends, not just when a user has clicked "pause".
You can use 'playing' event listener =>
const video = document.querySelector('#myVideo');
video.addEventListener("playing", function () {
// Write Your Code
});
Here is what we are using at http://www.develop.com/webcasts to keep people from accidentally leaving the page while a video is playing or paused.
$(document).ready(function() {
var video = $("video#webcast_video");
if (video.length <= 0) {
return;
}
window.onbeforeunload = function () {
var htmlVideo = video[0];
if (htmlVideo.currentTime < 0.01 || htmlVideo.ended) {
return null;
}
return "Leaving this page will stop your video.";
};
}
a bit example
var audio = new Audio('https://www.soundhelix.com/examples/mp3/SoundHelix-Song-1.mp3')
if (audio.paused) {
audio.play()
} else {
audio.pause()
}
I just looked at the link #tracevipin added (http://www.w3.org/2010/05/video/mediaevents.html), and I saw a property named "paused".
I have ust tested it and it works just fine.
This is my code - by calling the function play() the video plays or pauses and the button image is changed.
By calling the function volume() the volume is turned on/off and the button image also changes.
function play() {
var video = document.getElementById('slidevideo');
if (video.paused) {
video.play()
play_img.src = 'img/pause.png';
}
else {
video.pause()
play_img.src = 'img/play.png';
}
}
function volume() {
var video = document.getElementById('slidevideo');
var img = document.getElementById('volume_img');
if (video.volume > 0) {
video.volume = 0
volume_img.src = 'img/volume_off.png';
}
else {
video.volume = 1
volume_img.src = 'img/volume_on.png';
}
}
I just did it very simply using onpause and onplay properties of the html video tag. Create some javascript function to toggle a global variable so that the page knows the status of the video for other functions.
Javascript below:
// onPause function
function videoPause() {
videoPlaying = 0;
}
// onPause function
function videoPlay() {
videoPlaying = 1;
}
Html video tag:
<video id="mainVideo" width="660" controls onplay="videoPlay();" onpause="videoPause();" >
<source src="video/myvideo.mp4" type="video/mp4">
</video>
than you can use onclick javascript to do something depending on the status variable in this case videoPlaying.
hope this helps...
My requirement was to click on the video and pause if it was playing or play if it was paused. This worked for me.
<video id="myVideo" #elem width="320" height="176" autoplay (click)="playIfPaused(elem)">
<source src="your source" type="video/mp4">
</video>
inside app.component.ts
playIfPaused(file){
file.paused ? file.play(): file.pause();
}
var video_switch = 0;
function play() {
var media = document.getElementById('video');
if (video_switch == 0)
{
media.play();
video_switch = 1;
}
else if (video_switch == 1)
{
media.pause();
video_switch = 0;
}
}
I just added that to the media object manually
let media = document.querySelector('.my-video');
media.isplaying = false;
...
if(media.isplaying) //do something
Then just toggle it when i hit play or pause.
a bit example when playing video
let v = document.getElementById('video-plan');
v.onplay = function() {
console.log('Start video')
};