transcribe() on English-only model won't complain when language="en" …

…is not given

whisper/transcribe.py

@@ -84,13 +84,16 @@ def transcribe(
  mel = log_mel_spectrogram(audio)
 
  if decode_options.get("language", None) is None:
- if verbose:
- print("Detecting language using up to the first 30 seconds. Use `--language` to specify the language")
- segment = pad_or_trim(mel, N_FRAMES).to(model.device).to(dtype)
- _, probs = model.detect_language(segment)
- decode_options["language"] = max(probs, key=probs.get)
- if verbose is not None:
- print(f"Detected language: {LANGUAGES[decode_options['language']].title()}")
+ if not model.is_multilingual:
+ decode_options["language"] = "en"
+ else:
+ if verbose:
+ print("Detecting language using up to the first 30 seconds. Use `--language` to specify the language")
+ segment = pad_or_trim(mel, N_FRAMES).to(model.device).to(dtype)
+ _, probs = model.detect_language(segment)
+ decode_options["language"] = max(probs, key=probs.get)
+ if verbose is not None:
+ print(f"Detected language: {LANGUAGES[decode_options['language']].title()}")
 
  language = decode_options["language"]
  task = decode_options.get("task", "transcribe")
@@ -282,7 +285,8 @@ def cli():
  os.makedirs(output_dir, exist_ok=True)
 
  if model_name.endswith(".en") and args["language"] not in {"en", "English"}:
- warnings.warn(f"{model_name} is an English-only model but receipted '{args['language']}'; using English instead.")
+ if args["language"] is not None:
+ warnings.warn(f"{model_name} is an English-only model but receipted '{args['language']}'; using English instead.")
  args["language"] = "en"
 
  temperature = args.pop("temperature")