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| 1 | +<html> |
| 2 | + <head> |
| 3 | + <script src="/dist/ffmpeg.dev.js"></script> |
| 4 | + <style> |
| 5 | + html, body { |
| 6 | + margin: 0; |
| 7 | + width: 100%; |
| 8 | + height: 100% |
| 9 | + } |
| 10 | + body { |
| 11 | + display: flex; |
| 12 | + flex-direction: column; |
| 13 | + align-items: center; |
| 14 | + } |
| 15 | + </style> |
| 16 | + </head> |
| 17 | + <body> |
| 18 | + <h3>Record video from webcam and transcode to mp4 (x264) and play!</h3> |
| 19 | + <div> |
| 20 | + <video id="webcam" width="320px" height="180px"></video> |
| 21 | + <video id="output-video" width="320px" height="180px" controls></video> |
| 22 | + </div> |
| 23 | + <button id="record" disabled>Start Recording</button> |
| 24 | + <p id="message"></p> |
| 25 | + <script> |
| 26 | + const { createWorker } = FFmpeg; |
| 27 | + const worker = createWorker({ |
| 28 | + corePath: '../../node_modules/@ffmpeg/core/ffmpeg-core.js', |
| 29 | + logger: ({ message }) => console.log(message), |
| 30 | + }); |
| 31 | + |
| 32 | + const webcam = document.getElementById('webcam'); |
| 33 | + const recordBtn = document.getElementById('record'); |
| 34 | + const startRecording = () => { |
| 35 | + const rec = new MediaRecorder(webcam.srcObject); |
| 36 | + const chunks = []; |
| 37 | + |
| 38 | + recordBtn.textContent = 'Stop Recording'; |
| 39 | + recordBtn.onclick = () => { |
| 40 | + rec.stop(); |
| 41 | + recordBtn.textContent = 'Start Recording'; |
| 42 | + recordBtn.onclick = startRecording; |
| 43 | + } |
| 44 | + |
| 45 | + rec.ondataavailable = e => chunks.push(e.data); |
| 46 | + rec.onstop = async () => { |
| 47 | + transcode(new Uint8Array(await (new Blob(chunks)).arrayBuffer())); |
| 48 | + }; |
| 49 | + rec.start(); |
| 50 | + }; |
| 51 | + |
| 52 | + (async () => { |
| 53 | + webcam.srcObject = await navigator.mediaDevices.getUserMedia({ video: true, audio: true }); |
| 54 | + await webcam.play(); |
| 55 | + recordBtn.disabled = false; |
| 56 | + recordBtn.onclick = startRecording; |
| 57 | + })(); |
| 58 | + |
| 59 | + const transcode = async (webcamData) => { |
| 60 | + const message = document.getElementById('message'); |
| 61 | + const name = 'record.webm'; |
| 62 | + message.innerHTML = 'Loading ffmpeg-core.js'; |
| 63 | + await worker.load(); |
| 64 | + message.innerHTML = 'Start transcoding'; |
| 65 | + await worker.write(name, webcamData); |
| 66 | + await worker.transcode(name, 'output.mp4'); |
| 67 | + message.innerHTML = 'Complete transcoding'; |
| 68 | + const { data } = await worker.read('output.mp4'); |
| 69 | + |
| 70 | + const video = document.getElementById('output-video'); |
| 71 | + video.src = URL.createObjectURL(new Blob([data.buffer], { type: 'video/mp4' })); |
| 72 | + } |
| 73 | + </script> |
| 74 | + </body> |
| 75 | +</html> |
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