electron-capturer

electron-capturer

Capture Electron's window and export as video

Requirements

• ffmpeg

  if you have FFmpeg installed, make sure to set the FFMPEG_PATH environment variable;

  Or, install @ffmpeg-installer/ffmpeg

• electron

Install

npm i electron-capturer

Use

const fs = require("fs");
const { capture } = require("electron-capturer");
const { app, BrowserWindow } = require("electron");

app.whenReady().then(() => {
  app.on("activate", () => {
    const win = new BrowserWindow({
      width: 800,
      height: 800,
      webPreferences: {
        nodeIntegration: true,
        contextIsolation: false,
      },
    });

    capture(win, { savePath: 'capture.mp4', fps: 25 }).then(handle => {
      handle.stop().then(() => {
        const buffer = fs.readFileSync('capture.mp4');
        win.close();
        win.destroy();
      });
    })
  });
});

API

capture(win, [options])

• win<BrowserWindow>: window to be captured
• options<Object>
  • savePath<String>: path to save the exported video;
  • fps<Number>: The frames per secord, defaluts to 25;
• returns: <Promise<VideoCapture>>

class:VideoCapture

Core class of capture, created when call capture(win), and return an instance;

VideoCapture.stop()

Manually stop capturing.

This method will automatically be called when BrowserWindow is closed or destroyed

const capture = await capture(win, "capture.mp4");
await new Promise(r => setTimeout(r, 5000));
await capture.stop();

Demo

There's an Electron example in project, Clone the project and run:

yarn dev