konowebcodecs/examples/browser/transcode.html
2021-05-17 17:03:07 +08:00

58 lines
1.6 KiB
HTML

<html>
<head>
<script src="/dist/ffmpeg.dev.js"></script>
<style>
html, body {
margin: 0;
width: 100%;
height: 100%
}
body {
display: flex;
flex-direction: column;
align-items: center;
}
</style>
</head>
<body>
<h3>Upload a video to transcode to mp4 (x264) and play!</h3>
<video id="output-video" controls></video><br/>
<input type="file" id="uploader">
<button onClick="cancel()">Cancel</button>
<p id="message"></p>
<script>
const { createFFmpeg, fetchFile } = FFmpeg;
let ffmpeg = null;
const transcode = async ({ target: { files } }) => {
if (ffmpeg === null) {
ffmpeg = createFFmpeg({ log: true });
}
const message = document.getElementById('message');
const { name } = files[0];
message.innerHTML = 'Loading ffmpeg-core.js';
if (!ffmpeg.isLoaded()) {
await ffmpeg.load();
}
ffmpeg.FS('writeFile', name, await fetchFile(files[0]));
message.innerHTML = 'Start transcoding';
await ffmpeg.run('-i', name, 'output.mp4');
message.innerHTML = 'Complete transcoding';
const data = ffmpeg.FS('readFile', 'output.mp4');
const video = document.getElementById('output-video');
video.src = URL.createObjectURL(new Blob([data.buffer], { type: 'video/mp4' }));
}
const elm = document.getElementById('uploader');
elm.addEventListener('change', transcode);
const cancel = () => {
try {
ffmpeg.exit();
} catch(e) {}
ffmpeg = null;
}
</script>
</body>
</html>