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<!DOCTYPE html> |
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<html lang="en"> |
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<head> |
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<meta charset="UTF-8"> |
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<title>MP4 to WebM Converter</title> |
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<style> |
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body { |
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font-family: Arial, sans-serif; |
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max-width: 600px; |
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margin: 20px auto; |
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padding: 20px; |
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} |
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.container { |
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border: 2px dashed #ccc; |
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padding: 20px; |
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text-align: center; |
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} |
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#preview { |
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max-width: 100%; |
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margin-top: 20px; |
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} |
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.hidden { |
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display: none; |
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} |
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button { |
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padding: 10px 20px; |
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background: #4CAF50; |
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color: white; |
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border: none; |
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cursor: pointer; |
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margin: 10px; |
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} |
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button:disabled { |
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background: #cccccc; |
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} |
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</style> |
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</head> |
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<body> |
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<div class="container"> |
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<h2>MP4 to WebM Converter</h2> |
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<input type="file" id="fileInput" accept="video/mp4"> |
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<button id="convertBtn" disabled>Convert to WebM</button> |
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<a id="downloadLink" class="hidden"><button>Download WebM</button></a> |
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<video id="preview" controls></video> |
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</div> |
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<script> |
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const fileInput = document.getElementById('fileInput'); |
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const convertBtn = document.getElementById('convertBtn'); |
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const downloadLink = document.getElementById('downloadLink'); |
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const preview = document.getElementById('preview'); |
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let mediaRecorder; |
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let recordedChunks = []; |
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fileInput.addEventListener('change', async (e) => { |
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const file = e.target.files[0]; |
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if (!file) return; |
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const url = URL.createObjectURL(file); |
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preview.src = url; |
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convertBtn.disabled = false; |
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}); |
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convertBtn.addEventListener('click', async () => { |
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if (!preview.src) return; |
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try { |
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convertBtn.disabled = true; |
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convertBtn.textContent = 'Converting...'; |
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const stream = await preview.captureStream(); |
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recordedChunks = []; |
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mediaRecorder = new MediaRecorder(stream, { |
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mimeType: 'video/webm; codecs=vp9' |
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}); |
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mediaRecorder.ondataavailable = (e) => { |
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if (e.data.size > 0) recordedChunks.push(e.data); |
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}; |
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mediaRecorder.onstop = () => { |
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const blob = new Blob(recordedChunks, { type: 'video/webm' }); |
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const url = URL.createObjectURL(blob); |
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downloadLink.href = url; |
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downloadLink.download = `converted_${Date.now()}.webm`; |
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downloadLink.classList.remove('hidden'); |
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convertBtn.textContent = 'Convert to WebM'; |
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convertBtn.disabled = false; |
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}; |
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mediaRecorder.start(); |
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preview.play(); |
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preview.addEventListener('ended', () => { |
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mediaRecorder.stop(); |
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}); |
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} catch (error) { |
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console.error('Conversion error:', error); |
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alert('Error during conversion: ' + error.message); |
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convertBtn.textContent = 'Convert to WebM'; |
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convertBtn.disabled = false; |
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} |
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}); |
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</script> |
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</body> |
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</html> |
