Get video duration when input a video file
In modern browsers, You can use the URL API's URL.createObjectURL()
with an non appended video element to load the content of your file.
var myVideos = [];
window.URL = window.URL || window.webkitURL;
document.getElementById('fileUp').onchange = setFileInfo;
function setFileInfo() {
var files = this.files;
myVideos.push(files[0]);
var video = document.createElement('video');
video.preload = 'metadata';
video.onloadedmetadata = function() {
window.URL.revokeObjectURL(video.src);
var duration = video.duration;
myVideos[myVideos.length - 1].duration = duration;
updateInfos();
}
video.src = URL.createObjectURL(files[0]);;
}
function updateInfos() {
var infos = document.getElementById('infos');
infos.textContent = "";
for (var i = 0; i < myVideos.length; i++) {
infos.textContent += myVideos[i].name + " duration: " + myVideos[i].duration + '\n';
}
}
<div id="input-upload-file" class="box-shadow">
<span>upload! (ღ˘⌣˘ღ)</span>
<input type="file" class="upload" id="fileUp" name="fileUpload">
</div>
<pre id="infos"></pre>
Here is async/await Promise version:
const loadVideo = file => new Promise((resolve, reject) => {
try {
let video = document.createElement('video')
video.preload = 'metadata'
video.onloadedmetadata = function () {
resolve(this)
}
video.onerror = function () {
reject("Invalid video. Please select a video file.")
}
video.src = window.URL.createObjectURL(file)
} catch (e) {
reject(e)
}
})
Can be used as follows:
const video = await loadVideo(e.currentTarget.files[0])
console.log(video.duration)
I needed to validate a single file before continuing to execute more code, here is my method with the help of Kaiido's answer!
onchange event when a user uploads a file:
$("input[type=file]").on("change", function(e) {
var file = this.files[0]; // Get uploaded file
validateFile(file) // Validate Duration
e.target.value = ''; // Clear value to allow new uploads
})
Now validate duration:
function validateFile(file) {
var video = document.createElement('video');
video.preload = 'metadata';
video.onloadedmetadata = function() {
window.URL.revokeObjectURL(video.src);
if (video.duration < 1) {
console.log("Invalid Video! video is less than 1 second");
return;
}
methodToCallIfValid();
}
video.src = URL.createObjectURL(file);
}