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<script lang="ts">
import { FFmpeg } from '@ffmpeg/ffmpeg';
// @ts-ignore
import type { LogEvent } from '@ffmpeg/ffmpeg/dist/esm/types';
import { fetchFile, toBlobURL } from '@ffmpeg/util';
let videoEl: HTMLVideoElement;
const baseURL = 'https://unpkg.com/@ffmpeg/core-mt@0.12.6/dist/esm';
const videoURL = 'https://raw.githubusercontent.com/ffmpegwasm/testdata/master/video-15s.avi';
let message = $state('Click Start to Transcode');
const transcode = async () => {
const ffmpeg = new FFmpeg();
message = 'Loading ffmpeg-core.js';
ffmpeg.on('log', ({ message: msg }: LogEvent) => {
message = msg;
console.log(message);
});
await ffmpeg.load({
coreURL: await toBlobURL(`${baseURL}/ffmpeg-core.js`, 'text/javascript'),
wasmURL: await toBlobURL(`${baseURL}/ffmpeg-core.wasm`, 'application/wasm'),
workerURL: await toBlobURL(`${baseURL}/ffmpeg-core.worker.js`, 'text/javascript')
});
message = 'Start transcoding';
await ffmpeg.writeFile('test.avi', await fetchFile(videoURL));
await ffmpeg.exec(['-i', 'test.avi', 'test.mp4']);
message = 'Complete transcoding';
const data = await ffmpeg.readFile('test.mp4');
console.log('done');
videoEl.src = URL.createObjectURL(
// @ts-ignore bufferlike is good enuf
new Blob([(data as Uint8Array).buffer], { type: 'video/mp4' })
);
};
</script>
<div>
<!-- svelte-ignore a11y_media_has_caption -->
<video bind:this={videoEl} controls></video>
<br />
<button onclick={transcode}>Start</button>
<p>{message}</p>
</div>
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