JSPM – videoplot@1.2.7

Package Exports

videoplot

This package does not declare an exports field, so the exports above have been automatically detected and optimized by JSPM instead. If any package subpath is missing, it is recommended to post an issue to the original package (videoplot) to support the "exports" field. If that is not possible, create a JSPM override to customize the exports field for this package.

Readme

Install

Prerequisites

Having ffmpeg installed on your computer see fluent-ffmpeg prerequisites

For ubuntu, you should also do

sudo apt-get install libgif-dev

Npm installation

npm install videoplot

Example

First example (1 simple curve)	Second example (3 curves)

Usage

const Videoplot = require('videoplot');

var plot = new Videoplot({ w:600, h:600, duration: 30, fps: 8 });

// create random data
const y = [];
for(var i = 0; i< 10; i++){
    y.push(Math.random());
}

// chartjs dataset format

const datasets = [];
datasets.push({
    label : "graph",
    borderColor: "#FFFFFF",
    backgroundColor: "#888888",
    fill: false,
    data : y
});

// chartjs dataset format
plot.drawVideoChart({
        type: 'line',
        wScale: 4,
        data: {
            datasets : datasets
        },
        options: {
            elements: {
                point : {
                    pointStyle : 'line'
                }
            },
            scales: {
                xAxes: [{
                    ticks: {
                        display: false
                    }
                }],
                yAxes: [{
                    ticks: {
                        display: false,
                        beginAtZero: true,
                        suggestedMax: 1
                    }
                }],
            }
        }
})
.then(() => {
    console.log("Chart is created");
    // chart is created
    return plot.writeVideoToFile({filename: './examples/example.gif'});
    //return plot.getVideoStream('image/gif');
})
.catch(err => {
    console.error("Error : ", err)
})
.then(() => {
    console.log("Chart is saved into ./examples/example.gif");
})

Documentation

Documentation is inside the code as JSDoc.

TO DO

better x scale management (labels ...)
more chartjs options handling
video output handling

Thanks

Thanks to fluent-ffmpeg and chartjs-node