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Etro is a typescript framework for programmatically editing videos. It lets you composite layers and add filters (effects). Etro comes shipped with text, video, audio and image layers, along with a bunch of GLSL effects. You can also define your own layers and effects with javascript and GLSL.
npm i etro
Let's look at an example:
import etro from 'etro'
var movie = new etro.Movie({ canvas: outputCanvas })
var layer = new etro.layer.Video({ startTime: 0, source: videoElement }) // the layer starts at 0s
movie.addLayer(layer)
movie.record({ frameRate: 24 }) // or just `play` if you don't need to save it
.then(blob => ...)
The blob could then be downloaded as a video file or displayed using a <video>
element.
See the documentation for a list of all built-in layers.
Effects can transform the output of a layer or movie:
var layer = new etro.layer.Video({ startTime: 0, source: videoElement })
.addEffect(new etro.effect.Brightness({ brightness: +100) }))
See the documentation for a list of all built-in effects.
Most properties also support keyframes and functions:
// Keyframes
layer.effects[0].brightness = new etro.KeyFrame(
[0, -75], // brightness == -75 at 0 seconds
[2, +75] // +75 at 2 seconds
)
// Function
layer.effects[0].brightness = () => 100 * Math.random() - 50
See the documentation for more info.
To use Etro in Node, see the wrapper:
Start the development server (only used for convenience while developing; you don't need a server to use Etro):
npm i
npm run build
npm start
Now you can open any example (such as http://127.0.0.1:8080/examples/introduction/hello-world1.html).
See the contributing guide
Distributed under GNU General Public License v3. See LICENSE
for more
information.
[0.12.1] - 2024-02-19
TypeError: this.data is undefined
when applying a Transform
effect with a dynamic matrix.FAQs
An extendable video-editing framework for the browser
The npm package etro receives a total of 179 weekly downloads. As such, etro popularity was classified as not popular.
We found that etro demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 1 open source maintainer collaborating on the project.
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