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transcode.html
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transcode.html
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<html>
<head>
<link rel="stylesheet" href="/ffmpeg.wasm-gh-pages/style.css">
<script src="/ffmpeg.wasm-gh-pages/assets/ffmpeg/package/dist/umd/ffmpeg.js"></script>
<script src="/ffmpeg.wasm-gh-pages/assets/util/package/dist/umd/index.js"></script>
</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">
<p id="message"></p>
<script>
const { fetchFile } = FFmpegUtil;
const { FFmpeg } = FFmpegWASM;
let ffmpeg = null;
const transcode = async ({ target: { files } }) => {
const message = document.getElementById('message');
if (ffmpeg === null) {
ffmpeg = new FFmpeg();
ffmpeg.on("log", ({ message }) => {
console.log(message);
})
ffmpeg.on("progress", ({ progress, time }) => {
message.innerHTML = `${progress * 100} %, time: ${time / 1000000} s`;
});
await ffmpeg.load({
coreURL: "/ffmpeg.wasm-gh-pages/assets/core/package/dist/umd/ffmpeg-core.js",
});
}
const { name } = files[0];
await ffmpeg.writeFile(name, await fetchFile(files[0]));
message.innerHTML = 'Start transcoding';
console.time('exec');
await ffmpeg.exec(['-i', name, 'output.mp4']);
console.timeEnd('exec');
message.innerHTML = 'Complete transcoding';
const data = await ffmpeg.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);
</script>
</body>
</html>