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canvas-video-generator
Advanced tools
Capture HTML5 canvas frames and render high quality video with FFMPEG.
This module has two components:
The workflow is to start the server, then use the client library to send frames to the server and signal when the video is to be finalized.
$ npm install -g canvas-video-generator
Run cvg
:
$ cvg
This will start a server listening on port 3172
that will store rendered videos in the current working directory and clean up any generated temp files.
Here's all the options:
$ cvg --help
usage: cvg [options]
options:
-h --help: This help
-p --port: Port to use [3172]
-o --odir: Directory to store final video in [current working directory]
-n --noclean: Do not clean up temporary files [false]
First, include the client library:
<script src='http://localhost:3172/cvg.js'></script>
The cvg
module has been added to the browser's global context.
Next, in your render loop, set up some logic to send frames to the server:
var count = 0;
function render() {
// Draw on your canvas.
// Send the current canvas contents to the server.
cvg.addFrame(canvas);
count++;
if (count < 100) {
requestAnimationFrame(render);
} else {
// Tell the server that we're done with this video. Render it with the filename 'example' (.mp4 will be appended).
cvg.render('example');
}
}
Note that you'll want to fix your canvas size to the resolution you want your video rendered at.
That's it. Watch your terminal to see the video rendering progress. cvg
will tell you where to find it when it's done.
FAQs
Generate smooth videos from browser canvas elements.
We found that canvas-video-generator demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 1 open source maintainer collaborating on the project.
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