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| """ | |
| Speech-to-text transcription for subtitle generation. | |
| """ | |
| import os | |
| from pathlib import Path | |
| import assemblyai as aai | |
| from src.utils.logger import get_logger | |
| from config import ASSEMBLYAI_API_KEY, OUTPUT_DIR | |
| logger = get_logger(__name__) | |
| # Configure AssemblyAI | |
| aai.settings.api_key = ASSEMBLYAI_API_KEY | |
| def generate_subtitles(audio_path, language_code="en"): | |
| """ | |
| Generate subtitles using AssemblyAI's speech recognition. | |
| Args: | |
| audio_path (str): Path to the audio file | |
| language_code (str): Language code for transcription | |
| Returns: | |
| Path: Path to the generated SRT subtitle file | |
| Raises: | |
| Exception: If subtitle generation fails | |
| """ | |
| try: | |
| audio_path = Path(audio_path) | |
| logger.info(f"Transcribing audio with AssemblyAI: {audio_path}") | |
| # Create output filename | |
| audio_name = audio_path.stem | |
| srt_path = OUTPUT_DIR / f"{audio_name}_subtitles.srt" | |
| # Configure transcription options | |
| config = aai.TranscriptionConfig( | |
| language_code=language_code, | |
| punctuate=True, | |
| format_text=True | |
| ) | |
| # Transcribe audio | |
| transcriber = aai.Transcriber() | |
| transcript = transcriber.transcribe(str(audio_path), config=config) | |
| if not transcript or not hasattr(transcript, 'export_subtitles_srt'): | |
| error_message = "Transcription failed or returned invalid result" | |
| logger.error(error_message) | |
| raise Exception(error_message) | |
| # Export as SRT | |
| logger.info(f"Saving subtitles to: {srt_path}") | |
| with open(srt_path, "w", encoding="utf-8") as f: | |
| f.write(transcript.export_subtitles_srt()) | |
| logger.info(f"Subtitle generation successful: {srt_path}") | |
| return srt_path | |
| except Exception as e: | |
| logger.error(f"Subtitle generation failed: {str(e)}", exc_info=True) | |
| raise Exception(f"Subtitle generation failed: {str(e)}") | |