Page.startScreencast Chrome DevTools Protocol low FPS issue

With puppeteer I'm using Chrome DevTools Protocol Page.startScreencast to taking screenshots of webpages and converting those screenshots to a video with FFMPEG

This is a simplified version of the tool I created:

const browser = await puppeteer.launch({
     headless: true,
});
const page = await browser.newPage();
page.setViewport({
    width: 678,
    height: 1080,
});

await page.goto(`https://youtu.be/7G6FfKXvZX8`,
     {
        waitUntil: 'networkidle0',
     }
);

const client = await this.page.target().createCDPSession();
client.on('Page.screencastFrame', async (frameObject) => {

   await writeImageFilename(frameObject.data);
   await client.send('Page.screencastFrameAck', {
      sessionId: frameObject.sessionId,
   });
}

client.send('Page.startScreencast', {
   format: 'png',
   quality: 100,
   maxWidth: 678,
   maxHeight: 1080,
   everyNthFrame: 1,
});
await page.waitForTimeout(6000);
client.send('Page.stopScreencast');

// Helper func
async writeImageFilename(data) {
   const filename = path.join(
      '/tmp',
      Date.now().toString() + '.png'
    );
    fs.writeFileSync(filename, data, 'base64');
    return filename;
}

(I didn't include the ffmpeg part to keep it simple.)

The script above basicly goes to youtube and takes 60 screeenshots in 6 seconds. This way I can create a FFMPEG 10 fps video.

But that's the problem. Capturing 60 frames in 6 seconds is a very slow performance.

Is there any way to increase this number?