谁若想在困厄时得到援助，就应在平日待人以宽——萨迪
分享一个获取文件信息的js库MediaInfo.js
代码仓库：
https://github.com/buzz/mediainfo.js
代码如下：
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <meta http-equiv="X-UA-Compatible" content="IE=edge"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>Document</title> <script type="text/javascript" src="https://unpkg.com/mediainfo.js/dist/mediainfo.min.js"></script> </head> <body> <input id="fileinput" type="file" /> <script> const fileinput = document.getElementById('fileinput') const onChangeFile = (mediainfo) => { const file = fileinput.files[0] if (file) { console.log({ file }); const getSize = () => file.size const readChunk = (chunkSize, offset) => new Promise((resolve, reject) => { const reader = new FileReader() reader.onload = (event) => { if (event.target.error) { reject(event.target.error) } resolve(new Uint8Array(event.target.result)) } reader.readAsArrayBuffer(file.slice(offset, offset + chunkSize)) }) mediainfo .analyzeData(getSize, readChunk) .then((result) => { console.log({ result }) }) .catch((error) => { console.error(`An error occured:\n${error.stack}`) }) } } MediaInfo({ format: 'text' }, (mediainfo) => { fileinput.addEventListener('change', () => onChangeFile(mediainfo)) }) </script> </body> </html>
任意选择一个文件
