How to get the exact duration of an audio file in js All In One
How to get the exact duration of an audio file in js All In One
errors
audio duration time
precise
bug
seconds 10 进制转换 bug ❌
solutions
seconds 时间单位 60 进制转换 ✅
function getFormatTime(time) {
// seconds => minutes : seconds ✅
const minutes = `${parseInt(time / 60)}`.padStart(2, `0`);
const seconds = `${parseInt(time % 60)}`.padStart(2, `0`);
return `${minutes}:${seconds}`;
}
// time
const autoUpdateTime = () => {
console.log(`audio.duration =`, audio.duration)
current.innerText = getFormatTime(audio.currentTime);
total.innerText = getFormatTime(audio.duration);
}
audio.addEventListener("timeupdate", (event) => {
autoUpdateTime();
});
// fix: https://www.cnblogs.com/xgqfrms/p/18425599
function getFormatTime(time) {
const hours = `${parseInt(time / 3600)}`.padStart(2, `0`);
const minutes = `${parseInt(time / 60)}`.padStart(2, `0`);
const seconds = `${parseInt(time % 60)}`.padStart(2, `0`);
return `${hours}:${minutes}:${seconds}`;
}
demos
https://github.com/xgqfrms/web-podcast-player
<!-- <audio
id="audio"
controls
loop
autoplay
muted
src="./000-xyz/《雅思考试官方指南》(第2版)_听力练习音频_06 Test Practice - Section 1.mp3">
</audio> -->
<figure>
<figcaption>《雅思考试官方指南》(第2版)/听力练习音频/06 Test Practice - Section 1.mp3</figcaption>
<audio
id="audio"
controls
loop
src="./000-xyz/《雅思考试官方指南》(第2版)_听力练习音频_06 Test Practice - Section 1.mp3">
</audio>
</figure>
<!-- progress 进度条 -->
<div>
<span id="current-time">current</span>
<span id="time-line">/</span>
<span id="total-time">total</span>
</div>
// time
const current = document.getElementById("current-time");
const total = document.getElementById("total-time");
// time
const autoUpdateTime = () => {
// current.innerText = audio.currentTime;
// total.innerText = audio.duration;
current.innerText = (audio.currentTime / 60).toFixed(2);
total.innerText = (audio.duration / 60).toFixed(2);
}
// let sid = setInterval(() => {
// autoUpdateTime();
// }, 100);
audio.addEventListener("timeupdate", (event) => {
console.log("The currentTime attribute has been updated. Again.");
autoUpdateTime();
});
// time
const autoUpdateTime = () => {
console.log(`audio.duration =`, audio.duration)
current.innerText = getFormatTime(audio.currentTime);
total.innerText = getFormatTime(audio.duration);
// minutes => seconds
// current.innerText = (parseFloat(audio.currentTime.toFixed(2)) / 60).toFixed(2);
// total.innerText = (parseFloat(audio.duration.toFixed(2)) / 60).toFixed(2);
// current.innerText = (audio.currentTime / 60).toFixed(2);
// total.innerText = (audio.duration / 60).toFixed(2);
}
// let sid = setInterval(() => {
// autoUpdateTime();
// }, 100);
// audio.onloadedmetadata = () => {
// // fix: https://www.cnblogs.com/xgqfrms/p/18425599
// autoUpdateTime();
// // current.innerText = audio.currentTime;
// // total.innerText = audio.duration;
// };
audio.addEventListener("timeupdate", (event) => {
autoUpdateTime();
});
https://ielts-guide-2nd.xgqfrms.xyz/
time 误差 bug ❌
Reduced time precision / 时间精度降低
Reduced time precision / 时间精度降低
To offer protection against timing attacks and fingerprinting, the precision of video.currentTime might get rounded depending on browser settings. In Firefox, the privacy.reduceTimerPrecision preference is enabled by default and defaults to 2ms. You can also enable privacy.resistFingerprinting, in which case the precision will be 100ms or the value of privacy.resistFingerprinting.reduceTimerPrecision.microseconds, whichever is larger.
For example, with reduced time precision, the result of video.currentTime will always be a multiple of 0.002, or a multiple of 0.1 (or privacy.resistFingerprinting.reduceTimerPrecision.microseconds) with privacy.resistFingerprinting enabled.
为了防止计时攻击
和指纹识别
,video.currentTime 的精度
可能会根据浏览器设置进行舍入
。在 Firefox 中,privacy.reduceTimerPrecision 首选项默认启用,默认为 2 毫秒
。您还可以启用 privacy.resistFingerprinting,在这种情况下精度将为 100 毫秒
或 privacy.resistFingerprinting.reduceTimerPrecision.microseconds 的值,以较大者
为准。例如,在降低时间精度的情况下,video.currentTime 的结果将始终是 0.002 的倍数,或者在启用 privacy.resistFingerprinting 的情况下是 0.1 的倍数(或 privacy.resistFingerprinting.reduceTimerPrecision.microseconds)。
The HTMLMediaElement interface's currentTime
property specifies the current playback time in seconds. Changing the value of currentTime seeks the media to the new time.
HTMLMediaElement 接口的 currentTime 属性指定
当前播放时间(以秒
为单位)。 更改
currentTime 的值会寻找新时间的媒体。
A double-precision floating-point value indicating the current playback time in seconds.
指示当前播放时间(以秒为单位)的双精度
浮点值。
https://developer.mozilla.org/en-US/docs/Web/API/HTMLMediaElement/currentTime
The read-only HTMLMediaElement property duration
indicates the length of the element's media in seconds.
只读
HTMLMediaElement 属性持续时间指示
元素媒体的长度(以秒
为单位)。
https://developer.mozilla.org/en-US/docs/Web/API/HTMLMediaElement/duration
how to use js to create one audio player progress bar
progress
<progress id="progress-bar" value="0" max="1">
<!-- shadow dom / #shadow-root -->
<div pseudo="-webkit-progress-inner-element">
<div pseudo="-webkit-progress-bar">
<div pseudo="-webkit-progress-value" style="inline-size: 28.6192%; block-size: 100%;"></div>
</div>
</div>
</progress>
https://developer.mozilla.org/en-US/docs/Web/HTML/Element/progress
function getFormatTime(time) {
// seconds => minutes : seconds ✅
const minutes = `${parseInt(time / 60)}`.padStart(2, `0`);
const seconds = `${parseInt(time % 60)}`.padStart(2, `0`);
return `${minutes}:${seconds}`;
}
// time
const autoUpdateTime = () => {
// console.log(`audio.duration =`, audio.duration)
current.innerText = getFormatTime(audio.currentTime);
total.innerText = getFormatTime(audio.duration);
progress.value = (audio.currentTime / audio.duration);
// progressBackground + progressBar
// progressBar.style.width = `${(currentTime / duration) * 100}%`;
}
audio.addEventListener("timeupdate", (event) => {
autoUpdateTime();
});
input type="range"
<div class="jsx-840757008 progress-bar" style="opacity: 1;">
<input type="range" min="0" max="100" step="0.001" class="jsx-840757008 " value="0">
<div class="jsx-840757008 played" style="width: calc(32.77% + 5px);"></div>
</div>
https://podbay.fm/p/witnessed-night-shift
refs
web
podcast
player & music player All In One
https://www.cnblogs.com/xgqfrms/p/18416940
https://stackoverflow.com/search?q=js+audio+duration
function calculateCurrentValue(currentTime) {
const currentMinute = parseInt(currentTime / 60) % 60;
const currentSecondsLong = currentTime % 60;
const currentSeconds = currentSecondsLong.toFixed();
const currentTimeFormatted = `${currentMinute < 10 ? `0${currentMinute}` : currentMinute}:${currentSeconds < 10 ? `0${currentSeconds}` : currentSeconds
}`;
return currentTimeFormatted;
}
https://stackoverflow.com/questions/65697079/get-audio-duration-in-js-and-display-in-html
https://stackoverflow.com/questions/47960743/html-audio-object-reporting-wrong-file-duration
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本文首发于博客园,作者:xgqfrms,原文链接:https://www.cnblogs.com/xgqfrms/p/18425599
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