fix(cli): simplify determining output file

src/video2srt/cli.py

@@ -25,22 +25,16 @@ DEFAULT_MODEL = os.environ.get("WHISPER_MODEL", "large-v3")
 DEFAULT_DEVICE = "cuda" if torch.cuda.is_available() else "cpu"
 
 
-def output_stem(video: Path, override: str | None) -> Path:
-    if override:
-        path = Path(override)
-        return path.with_suffix("") if path.suffix == ".srt" else path
-    return video.with_suffix("")
-
-
 def process(video: Path, model: Whisper, args: argparse.Namespace) -> None:
-    out_stem = output_stem(video, args.output)
-    srt = out_stem.with_suffix(".srt")
+    srt = video.with_suffix(".srt")
+    if args.output:
+        srt = Path(args.output)
 
     if srt.exists() and not args.force:
         print(f"skip: {srt} exists (use --force to overwrite)")
         return
 
-    out_stem.parent.mkdir(parents=True, exist_ok=True)
+    srt.parent.mkdir(parents=True, exist_ok=True)
     print(f">> {video}")
 
     result: stable_whisper.WhisperResult = model.transcribe(  # type: ignore
@@ -50,9 +44,7 @@ def process(video: Path, model: Whisper, args: argparse.Namespace) -> None:
         suppress_silence=True,
         denoiser="demucs" if args.denoiser else None,
     )
-    result.to_srt_vtt(
-        str(srt), word_level=False, segment_level=True
-    )
+    result.to_srt_vtt(str(srt), word_level=False, segment_level=True)
 
     print(f"<< {srt}")