/**
 * Parser for ffmpeg's `silencedetect` filter output.
 *
 * The filter writes pairs of lines to stderr:
 *   [silencedetect @ 0x...] silence_start: 1.234
 *   [silencedetect @ 0x...] silence_end: 2.456 | silence_duration: 1.222
 *
 * If the recording ends mid-silence, the closing `silence_end` is omitted.
 * We close it ourselves using the optional `totalSec` parameter.
 */
export interface SilenceRange {
    startSec: number;
    endSec: number;
    durSec: number;
}
/**
 * Parse silencedetect lines into ranges. Robust to interleaved ffmpeg log
 * lines, partial buffers, and unterminated final silences.
 *
 * @param stderr  Combined ffmpeg stderr text.
 * @param totalSec  Total media duration. If the last detected silence has no
 *                  matching `silence_end`, it's closed at totalSec.
 */
export declare function parseSilenceDetect(stderr: string, totalSec?: number): SilenceRange[];
/**
 * Convert silence ranges (in seconds) to frame-aligned ranges. Rounds INWARD
 * — start ceils, end floors — so the resulting cut never trims into speech.
 */
export declare function silencesToFrameRanges(silences: SilenceRange[], fps: number): Array<{
    startFrame: number;
    endFrame: number;
}>;
/**
 * Compute the inverse: "keep" ranges between silences. Convenient for the
 * agent which mostly cares about what to KEEP (those become EDL events).
 *
 * Pads each keep range outward by `paddingSec` (clamped to neighbours and
 * total duration) so cuts don't slice the first/last syllable.
 */
export declare function keepRangesFromSilences(silences: SilenceRange[], totalSec: number, paddingSec?: number): SilenceRange[];
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