60 FPS Browser Sources

HTML sources normally run at a maximum of 30 frames per second. Advanced sources can request up to 60 FPS through a host-local property.

window.external.SetLocalProperty('prop:Browser60fps', '1');

Modify the Source Page

Add the property call before the rest of your source initialization:

window.external.SetLocalProperty('prop:Browser60fps', '1');

const xjs = require('xjs');

xjs.ready().then(() => {
  // Source setup continues here.
});

Inject Custom JavaScript

You can also add the same call through the custom code option in the HTML source properties window. Broadcaster refreshes the source when the setting changes.

Presentation Files

For manual testing, save the presentation, open the generated BPres file, and set the Browser60fps property to 1 for the relevant source.

This is host behavior rather than an XJS API. Some machines may still show black or empty output when forcing 60 FPS browser rendering.