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I'm trying to display the remaining time of a track being played in realtime, but can't figure it out since my javascript skills are not very advanced.
Wavesurfer.js provides a function called getCurrentTime(), but I don't know how to implement it, so the time is displayed next to the play button.
Thanks for the Help!
<!doctype html>
<meta charset="UTF-8">
<title>Unbenanntes Dokument</title>
<style type="text/css">
body {
padding: 2em;
padding-top:4em;
font: "Times New Roman";
color: white;
background-color: black;
letter-spacing: -.007em;
titel { line-height:1.5em; padding-bottom:13em;}
.colme {
color: #B7B498
.subtitel {
font-style:italic;}
#maincontent {
float:left;
width:700px;
padding-right:3em;}
#sidecontent {float:left; width:300px;}
.link {font-size:1em; float:left;}
</style>
</head>
<section id="maincontent">
<titel>
<p>Lorem Ipsom<br>
</titel>
<div id="waveform"></div>
<div id="waveform-timeline"></div>
<script src="https://cdnjs.cloudflare.com/ajax/libs/wavesurfer.js/1.2.3/wavesurfer.min.js">
</script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/wavesurfer.js/1.2.3/plugin/wavesurfer.timeline.min.js"></script>
<script type="text/javascript">
var wavesurfer = WaveSurfer.create({
container: '#waveform',
waveColor: 'white',
progressColor: 'red',
audioRate: 1,
barWidth: 3,
height: 250,
pixelRatio:1
wavesurfer.load('http://ia902606.us.archive.org/35/items/shortpoetry_047_librivox/song_cjrg_teasdale_64kb.mp3');
wavesurfer.on('ready', function () {
var timeline = Object.create(WaveSurfer.Timeline);
timeline.init({
wavesurfer: wavesurfer,
container: '#waveform-timeline'
});});
</script>
<button onClick="wavesurfer.playPause()">
</button>
<span style="padding-left:3em; font-family:Arial; font-size:0.8em;"> Recorder in 2016</span>
</section>
<div id="sidecontent">
<p>where</p>
<div style="clear:both"> </div>
</body>
</html>
Here is how you can do it:
I added some elements to hold the total, current and remaining time for demonstration:
<div>Total time: <span id="time-total">0.00</span> seconds</div>
<div>Current time: <span id="time-current">0.00</span> seconds</div>
<div>Ramaining time: <span id="time-remaining">0.00</span> seconds</div>
wavesurfer has an audioprocess event, which calls a function while its playing the file. I use that to get and display the times like this:
wavesurfer.on('audioprocess', function() {
if (wavesurfer.isPlaying()) {
var totalTime = wavesurfer.getDuration(),
currentTime = wavesurfer.getCurrentTime(),
remainingTime = totalTime - currentTime;
document.getElementById('time-total').innerText = totalTime.toFixed(1);
document.getElementById('time-current').innerText = currentTime.toFixed(1);
document.getElementById('time-remaining').innerText = remainingTime.toFixed(1);
Here is a working example based on your code:
var wavesurfer = WaveSurfer.create({
container: '#waveform',
waveColor: 'white',
progressColor: 'red',
audioRate: 1,
barWidth: 3,
height: 250,
pixelRatio:1
wavesurfer.load('https://wavesurfer-js.org/example/media/demo.wav');
wavesurfer.on('ready', function () {
var timeline = Object.create(WaveSurfer.Timeline);
timeline.init({
wavesurfer: wavesurfer,
container: '#waveform-timeline',
primaryFontColor: '#fff',
primaryColor: '#fff',
secondaryColor: '#fff',
secondaryFontColor: '#fff'
wavesurfer.on('audioprocess', function() {
if (wavesurfer.isPlaying()) {
var totalTime = wavesurfer.getDuration(),
currentTime = wavesurfer.getCurrentTime(),
remainingTime = totalTime - currentTime;
document.getElementById('time-total').innerText = Math.round(totalTime * 1000);
document.getElementById('time-current').innerText = Math.round(currentTime * 1000);
document.getElementById('time-remaining').innerText = Math.round(remainingTime * 1000);
body {
padding: 2em;
padding-top: 4em;
font: "Times New Roman";
color: white;
background-color: black;
letter-spacing: -0.007em;
titel {
line-height: 1.5em;
padding-bottom: 13em;
#maincontent {
float: left;
width: 500px;
<script src="https://unpkg.com/wavesurfer.js"></script>
<script src="https://unpkg.com/wavesurfer.js/dist/plugin/wavesurfer.timeline.min.js"></script>
<section id="maincontent">
<div id="waveform"></div>
<div id="waveform-timeline"></div>
<button onClick="wavesurfer.playPause()">Play</button>
<div>Total time: <span id="time-total">0</span> milliseconds</div>
<div>Current time: <span id="time-current">0</span> milliseconds</div>
<div>Ramaining time: <span id="time-remaining">0</span> milliseconds</div>
</section>
UPDATE
For millisecods, just multiply the seconds by 1000 and round the result.
document.getElementById('time-total').innerText = Math.round(totalTime * 1000);
UPDATE 2
To change the timeline plugin colors, use the timeline plugin options. You can control 4 different colors like this:
timeline.init({
wavesurfer: wavesurfer,
container: '#waveform-timeline',
primaryFontColor: '#fff',
primaryColor: '#fff',
secondaryFontColor: '#fff',
secondaryColor: '#fff'
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