babysor/MockingBird · error · RuntimeError

kokoro-tts produced no output for cue {cue.index}

Error message

kokoro-tts produced no output for cue {cue.index}

What it means

Error "kokoro-tts produced no output for cue {cue.index}" thrown in babysor/MockingBird.

Source

Thrown at skills/speak/scripts/render_timeline.py:350

        lang = cfg.get("lang")
        if lang:
            cmd += ["--lang", str(lang)]
        speed = cfg.get("speed")
        if speed is not None:
            cmd += ["--speed", str(speed)]
        cmd += ["--format", output_format]

        proc = subprocess.run(cmd, capture_output=True, text=True)
        if proc.returncode != 0:
            raise RuntimeError(
                f"kokoro-tts failed for cue {cue.index}: {proc.stderr}"
            )
    finally:
        Path(tmp_path).unlink(missing_ok=True)

    if out_path.exists():
        return probe_duration_ms(out_path) / 1000.0
    raise RuntimeError(f"kokoro-tts produced no output for cue {cue.index}")


# ── main ─────────────────────────────────────────────────────────────


def main() -> int:
    ap = argparse.ArgumentParser(
        description="Render timeline-accurate speech from SRT."
    )
    ap.add_argument("--srt", required=True, help="Input SRT file")
    ap.add_argument("--voice-map", required=True, help="Voice-map JSON")
    ap.add_argument(
        "--backend", choices=["kokoro", "noiz"], default="kokoro",
        help="TTS backend (default: kokoro)",
    )
    ap.add_argument("--api-key", help="API key (required for noiz backend)")
    ap.add_argument("--output", required=True, help="Output audio file")
    ap.add_argument("--base-url", default="https://noiz.ai/v1")

View on GitHub (pinned to 28dc5e14f1)

When it happens

Trigger: Thrown at skills/speak/scripts/render_timeline.py:350 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of babysor/MockingBird@28dc5e14f1 (2026-08-27). Data as JSON: /api/errors/930865d9eb6e2706. Report an issue: GitHub.