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