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jkosoy/runner.js

Created April 16, 2024 20:25
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  1. jkosoy created this gist Apr 16, 2024.
    43 changes: 43 additions & 0 deletions runner.js
    View file
    Original file line number Diff line number Diff line change
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    /*
    * usage
    * node runner.js | ffmpeg -y -c:v png -f image2pipe -r 30 -i - -c:v libx264 -pix_fmt yuv420p -movflags +faststart output.mp4
    *
    */
    const { chromium } = require('playwright');

    const WIDTH = 1920;
    const HEIGHT = 1080;
    const URL = 'URL_GOES_HERE';
    const DURATION_SECONDS = 10; // in seconds, how long to record
    const WAIT_PERIOD_SECONDS = Math.round(1/30); // in seconds, how long to wait between screenshots

    async function captureScreenshots() {
    const browser = await chromium.launch();
    const page = await browser.newPage();

    await page.setViewportSize({ width: WIDTH, height: HEIGHT });

    // Calculate the number of screenshots to capture
    const numberOfScreenshots = Math.ceil(DURATION_SECONDS / WAIT_PERIOD_SECONDS);
    await page.goto(URL);

    const screenshots = [];
    for (let i = 0; i < numberOfScreenshots; i++) {
    const screenshotData = await page.screenshot({ encoding: 'base64', format: 'png' });
    screenshots.push(screenshotData);
    await page.waitForTimeout(WAIT_PERIOD_SECONDS * 1000);
    }
    await browser.close();

    return screenshots;
    }

    captureScreenshots()
    .then(screenshots => {
    screenshots.forEach(screenshotData => process.stdout.write(screenshotData));
    })
    .catch(error => {
    console.error('Error:', error);
    process.exit(1);
    });