fix(video2srt): remove VAD

.local/bin/video2srt

@@ -19,9 +19,6 @@ DEFAULT_MODEL = Path(
 DEFAULT_BIN = Path(
     os.environ.get("WHISPER_BIN", WHISPER_DIR / "build/bin/whisper-cli")
 )
-DEFAULT_VAD = Path(
-    os.environ.get("VAD_MODEL", WHISPER_DIR / "models/ggml-silero-v6.2.0.bin")
-)
 
 MIN_WORDS_TO_WRAP = 2
 SRT_HEADER_LINES = 2
@@ -125,20 +122,6 @@ def process(video: Path, args: argparse.Namespace) -> None:
             cmd.append("--translate")
         if args.max_len > 0:
             cmd += ["--max-len", str(args.max_len), "--split-on-word"]
-        if args.vad:
-            if args.vad_model.exists():
-                cmd += ["--vad", "--vad-model", str(args.vad_model)]
-                if args.vad_max_speech > 0:
-                    cmd += ["-vmsd", str(args.vad_max_speech)]
-            else:
-                print(
-                    f"warn: VAD model not found at {args.vad_model}, running without VAD",
-                    file=sys.stderr,
-                )
-                print(
-                    f"      download with: sh {WHISPER_DIR}/models/download-vad-model.sh silero-v6.2.0",
-                    file=sys.stderr,
-                )
 
         subprocess.run(cmd, check=True)
 
@@ -182,18 +165,6 @@ def main() -> int:
     p.add_argument(
         "-f", "--force", action="store_true", help="Overwrite existing .srt"
     )
-    p.add_argument(
-        "--no-vad",
-        dest="vad",
-        action="store_false",
-        help="Disable Silero VAD pre-filtering (VAD reduces hallucination loops)",
-    )
-    p.add_argument(
-        "--vad-max-speech",
-        type=float,
-        default=15.0,
-        help="Max seconds of speech per VAD chunk; shorter values give tighter timestamps (default: 15)",
-    )
     p.add_argument(
         "--max-len",
         type=int,
@@ -209,9 +180,6 @@ def main() -> int:
     p.add_argument(
         "--bin", type=Path, default=DEFAULT_BIN, help=argparse.SUPPRESS
     )
-    p.add_argument(
-        "--vad-model", type=Path, default=DEFAULT_VAD, help=argparse.SUPPRESS
-    )
 
     args = p.parse_args()