How to make a video preview with canvas?
How to make a video preview with canvas?
1 answer
by
daisha ,
a month ago
@brandy
To create a video preview using the HTML5 Canvas element, you can follow these steps:
- Create an HTML file with the necessary structure. Include a video element and a canvas element within the body tag.
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<!DOCTYPE html>
<html>
<head>
<title>Video Preview</title>
</head>
<body>
<video id="video" width="640" height="360" controls>
<source src="video.mp4" type="video/mp4">
Your browser does not support the video tag.
</video>
<canvas id="canvas" width="640" height="360"></canvas>
</body>
</html>
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- Use JavaScript to capture frames from the video and draw them on the canvas. Add the following script in the HTML file between the opening and closing body tags.
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<script>
const video = document.getElementById('video');
const canvas = document.getElementById('canvas');
const ctx = canvas.getContext('2d');
video.addEventListener('play', () => {
setInterval(() => {
ctx.drawImage(video, 0, 0, canvas.width, canvas.height);
}, 1000 / 30);
});
</script>
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- Start the video playback and the frames will be drawn on the canvas in real-time.
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<script>
video.play();
</script>
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- Customize the video preview by altering the canvas size, frame rate, and other parameters in the JavaScript code.
- Test the video preview in a web browser to see the real-time display of frames from the video on the canvas.