/**
 * Headless browser capture — opens the StreamView in headless Chrome and
 * saves screenshots to a temp file. FFmpeg reads the temp file using
 * -loop 1 to continuously re-read the latest frame.
 *
 * This approach avoids the pipe bottleneck — FFmpeg reads at its own
 * pace while the browser updates the file independently.
 *
 * Visual parity with Electron:
 * - Appends `?popout` to the URL so the app renders StreamView directly
 *   (skips onboarding, auth gates, navigation chrome).
 * - Enables SwiftShader for WebGL so VRM avatar renders identically.
 * - Seeds localStorage with overlay layout, theme, and avatar index so
 *   the first rendered frame matches the configured appearance.
 * - Uses `waitUntil: "networkidle0"` to ensure all assets load before capture.
 * - Keeps CSS animations/transitions enabled for visual parity.
 */
/** Path to the temp frame file that FFmpeg reads */
export declare const FRAME_FILE: string;
export interface BrowserCaptureConfig {
    url: string;
    width?: number;
    height?: number;
    fps?: number;
    quality?: number;
    /** Optional overlay layout JSON to seed into localStorage before page load. */
    overlayLayout?: string;
    /** Theme name to apply (e.g. "milady", "haxor", "psycho"). */
    theme?: string;
    /** Avatar VRM index (1–8). */
    avatarIndex?: number;
    /** Destination ID — seeds the destination-specific localStorage key. */
    destinationId?: string;
}
export declare function startBrowserCapture(config: BrowserCaptureConfig): Promise<void>;
export declare function stopBrowserCapture(): Promise<void>;
export declare function isBrowserCaptureRunning(): boolean;
export declare function hasFrameFile(): boolean;
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