Web Page (Ultralight, cross-platform)

Web Page (Ultralight, cross-platform) input properties for Script Engine. Renders a live web page as a video source using the Ultralight browser engine — a lightweight HTML/CSS/JavaScript renderer designed for embedded use, with a much smaller footprint than a full Chromium engine. Point it at any HTTP/HTTPS URL — graphics overlays, scoreboards, dashboards, social-media feeds — and Composer captures the page as a video layer it can mix with the rest of the project. Cross-platform (Windows, Linux). Note: this input does not capture audio from the page — it produces a video-only signal. Use a dedicated audio input alongside it if the production needs sound. Ultralight supports a smaller subset of modern web features than Chromium, so for very complex pages prefer the Chromium variant on Windows.

Property	Type	Access	Description
`ShowAdvancedOptions`	`bool`	`get/set`	Show or hide the input's advanced settings in the editor UI. [default=false].
`WebPageRendererUrl`	`string`	`get/set`	HTTP or HTTPS URL of the web page to render. Set to any standard web URL. Changing this from a script lets you swap the rendered page at runtime — handy for cycling through dashboards, scoreboards, or status pages.
`BrowserLoadState`	`UltralightLoadingState`	`get`	Current page-load state of the renderer (read-only). Reflects whether the page is loading, has loaded successfully, or has hit an error. Driven indirectly by `StartCommand` / `StopCommand` and by changes to `WebPageRendererUrl`. Read this from a script to decide whether the page is ready.
`Width`	`int`	`get/set`	Width of the rendered page, in pixels. [min=32, max=4096, default=1024]. Acts like the browser's viewport width. Pages adapt their layout to this size, so set it to match how you want the page to render.
`Height`	`int`	`get/set`	Height of the rendered page, in pixels. [min=32, max=4096, default=480]. Acts like the browser's viewport height. Pages adapt their layout to this size, so set it to match how you want the page to render.
`StartCommand`	`Command`	`get`	Load the URL and start rendering the page.
`StopCommand`	`Command`	`get`	Stop rendering the page.
`AutoStart`	`bool`	`get/set`	Whether the input starts rendering as soon as the project loads. [default=false]. When true, the input invokes its start logic immediately on load (equivalent to running `StartCommand`). Disable to require an explicit start, useful when the page should only come live on operator action or via a script trigger.
`EnableConsoleLogging`	`bool`	`get/set`	Whether messages logged by the page's JavaScript are written to Composer's log. [default=false, debug]. Useful for debugging custom HTML overlays — `console.log` calls from the page show up alongside Composer's other log messages.
`PurgeIntervall`	`int`	`get/set`	How often the renderer reclaims unused memory, in milliseconds. [min=100, max=5000, default=300, debug]. Ultralight periodically frees cached resources to keep memory use under control. Shorter intervals reclaim memory more aggressively at a small extra cost; longer intervals reduce that cost slightly but let memory grow further between purges.
`PageRenderTime`	`string`	`get`	Recent per-frame rendering time, formatted as a millisecond string (read-only). Useful while monitoring how heavy the page is to render. Pages with complex content or animations take longer to render than static pages.
`EngineSleepTime`	`string`	`get`	Time the rendering engine spent idle between frames, formatted as a millisecond string (read-only, debug). Indicates how much headroom the renderer has — high values mean the engine has time to spare; very low values mean it's working close to capacity.
`EngineQueueSize`	`int`	`get`	Number of pending render requests in the engine's internal queue (read-only, debug). Should sit close to zero on a healthy system. A growing queue suggests the renderer can't keep up with the requested frame rate.
`PageRendersPerformed`	`int`	`get`	Total number of times the page has been rendered since the input was started (read-only, debug).
`PurgeMemoryPerformed`	`int`	`get`	Total number of memory-purge cycles the renderer has run since the input was started (read-only, debug). Driven by `PurgeIntervall`.

Inherits from: AbstractInput, AbstractAudioProcessing, AbstractAudioMetering.

See also: Web Page (Ultralight, cross-platform) in Inputs — user-facing introduction, screenshots, and section summaries.