Align audio and video elements in HTML5 using JavaScript

Question

Align audio and video elements in HTML5 using JavaScript

I am facing a situation where I have two files - one is a video file without volume and the other is an audio file. I am trying to play both of these files using <audio> and <video> tags. My goal is to make sure that both files are ready to play before starting the video, otherwise I want to wait until they are both ready. However, the canPlay method is not working as expected because it can only check for readiness of one file at a time.
Thanks

UPDATE

  audio.addEventListener('canplay',function(){
    audio.play();
    video.play(); 
  });

  video.addEventListener('canplay',function(){
    audio.play();
    video.play(); 
  });

I tried this approach but it did not work as intended. The problem is that when one of them starts playing, it triggers the play for both files simultaneously, regardless of whether the other file is ready or not, due to the use of play() for both.

javascript html audio video

Answer 1

Answer №1

Monitor the canplaythrough event for both elements and if both are ready, initiate playback on both.

The canplaythrough event is triggered when the browser can play the media content without interruptions due to buffering.

Here's a way to achieve this:

var audioReady = false,
  videoReady = false;
audio.addEventListener('canplaythrough', function() {
  audioReady = true;
  playAll();
});

video.addEventListener('canplaythrough', function() {
  videoReady = true;
  playAll();
});

function playAll() {
  if (audioReady && videoReady) {
    audio.play();
    video.play();
  }
}

Note: You can also use promises to accomplish the same behavior.

Check out this alternative approach:

var audioPromise = new Promise(function(resolve) {
  audio.addEventListener('canplaythrough', function() {
    resolve();
  });
});
var videoPromise = new Promise(function(resolve, reject) {
  video.addEventListener('canplaythrough', function() {
    resolve();
  });
});

function playAll() {
  audio.play();
  video.play();
}
Promise.all([audioPromise, videoPromise]).then(playAll);

Answer 2

Monitor the canplaythrough event for both elements and if both are ready, initiate playback on both.

The canplaythrough event is triggered when the browser can play the media content without interruptions due to buffering.

Here's a way to achieve this:

var audioReady = false,
  videoReady = false;
audio.addEventListener('canplaythrough', function() {
  audioReady = true;
  playAll();
});

video.addEventListener('canplaythrough', function() {
  videoReady = true;
  playAll();
});

function playAll() {
  if (audioReady && videoReady) {
    audio.play();
    video.play();
  }
}

Note: You can also use promises to accomplish the same behavior.

Check out this alternative approach:

var audioPromise = new Promise(function(resolve) {
  audio.addEventListener('canplaythrough', function() {
    resolve();
  });
});
var videoPromise = new Promise(function(resolve, reject) {
  video.addEventListener('canplaythrough', function() {
    resolve();
  });
});

function playAll() {
  audio.play();
  video.play();
}
Promise.all([audioPromise, videoPromise]).then(playAll);

Align audio and video elements in HTML5 using JavaScript

Answer №1

Similar questions

Why is Python BeautifulSoup's findAll function not returning all the elements in the web page

Tips for moving a title sideways and adjusting the bottom section by x pixels

Unusual Box-shadow glitch experienced exclusively when scrolling in Chrome 51

Sharing and showcasing files directly from a local directory

AngularJS allows for the creation of cascading dropdown selects, where the options in the second select

Utilizing jQuery's nextUntil() method to target elements that are not paragraphs

Issue with MUI-table: The alternate rows in the MUI table component are not displaying different colors as intended

javascript design pattern - achieving unexpected outcome

A fragmented rendering of a gallery featuring a CSS dropdown menu

What are the steps to modify the text color in WKWebView?

npm unable to locate the specified file

What steps do I need to take to ensure the CSS hover effect functions properly?

Java Library for Converting HTML to Textile Format

Using Jest or Mocha alongside Vue: Uncaught SyntaxError: Cannot use import statement outside a module

Having trouble with accessing the upvote/downvote input within a Django template

Transform your image using the Bootstrap framework

The Flutter image blurs into a striking combination of red and black as the screen dimensions are altered

The reload button retains functionality while being present within an Angular2 form, allowing for a seamless user experience. The

Issue: Unhandled promise rejection: BraintreeError: The 'authorization' parameter is mandatory for creating a client

Exploring the Integration of jQuery AJAX in a Contact Form