Dengevoice / scripts /transcribe_mms.py
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Added execution scripts for data preparation, model transcription, and WER scoring
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import argparse
import librosa
import torch
from transformers import AutoProcessor, Wav2Vec2ForCTC
from _common import load_clips, write_results
MODEL_ID = "facebook/mms-1b-all"
# MMS's own ISO 639-3 language codes.
MMS_LANG_CODE = {
"igbo": "ibo",
"yoruba": "yor",
"hausa": "hau",
"pidgin": "eng", # no dedicated Pidgin adapter — fall back to English,
# same reasoning as Whisper's Pidgin fallback.
}
def main():
parser = argparse.ArgumentParser()
parser.add_argument("--language", default="igbo")
args = parser.parse_args()
target_lang = MMS_LANG_CODE.get(args.language, "eng")
if args.language == "pidgin":
print("[warn] MMS has no dedicated Pidgin adapter — using 'eng'. "
"Note this substitution in the report.")
clips = load_clips(args.language)
print(f"[info] Loading {MODEL_ID} with '{target_lang}' adapter "
f"(first run downloads it — this model is large)…")
processor = AutoProcessor.from_pretrained(MODEL_ID, target_lang=target_lang)
model = Wav2Vec2ForCTC.from_pretrained(
MODEL_ID, target_lang=target_lang, ignore_mismatched_sizes=True
)
model.load_adapter(target_lang)
print(f"[info] MMS: {len(clips)} clips, language '{target_lang}'")
rows = []
for i, (clip_id, wav_path) in enumerate(clips, 1):
audio, sr = librosa.load(wav_path, sr=16000)
inputs = processor(audio, sampling_rate=16000, return_tensors="pt")
with torch.no_grad():
logits = model(**inputs).logits
ids = torch.argmax(logits, dim=-1)[0]
transcript = processor.decode(ids).strip()
rows.append((clip_id, transcript))
print(f" [{i}/{len(clips)}] {clip_id} ← \"{transcript[:60]}…\"")
write_results("mms", rows)
if __name__ == "__main__":
main()