Files
Brancheneinstufung2/transcription-tool/backend/services/orchestrator.py

199 lines
7.4 KiB
Python

import logging
import json
from sqlalchemy.orm import Session
from .ffmpeg_service import FFmpegService
from .transcription_service import TranscriptionService
from ..database import Meeting, TranscriptChunk
from ..config import settings
logger = logging.getLogger(__name__)
def parse_time_to_seconds(time_str):
try:
parts = time_str.split(':')
if len(parts) == 2: # MM:SS
return int(parts[0]) * 60 + int(parts[1])
elif len(parts) == 3: # HH:MM:SS
return int(parts[0]) * 3600 + int(parts[1]) * 60 + int(parts[2])
except:
return 0
return 0
def clean_json_string(text):
text = text.strip()
if text.startswith("```json"):
text = text[7:]
elif text.startswith("```"):
text = text[3:]
if text.endswith("```"):
text = text[:-3]
return text.strip()
def process_meeting_task(meeting_id: int, db_session_factory):
db = db_session_factory()
meeting = db.query(Meeting).filter(Meeting.id == meeting_id).first()
if not meeting:
return
try:
ffmpeg = FFmpegService()
transcriber = TranscriptionService()
# Phase 1: Split
meeting.status = "SPLITTING"
db.commit()
meeting.duration_seconds = ffmpeg.get_duration(meeting.file_path)
chunks = ffmpeg.split_audio(meeting.file_path, meeting.id)
# Phase 2: Transcribe
meeting.status = "TRANSCRIBING"
db.commit()
all_text = []
for i, chunk_path in enumerate(chunks):
offset = i * settings.CHUNK_DURATION_SEC
logger.info(f"Processing chunk {i+1}/{len(chunks)} with offset {offset}s")
result = transcriber.transcribe_chunk(chunk_path, offset)
# Parse JSON and Adjust Timestamps
json_data = []
try:
cleaned_text = clean_json_string(result["raw_text"])
raw_json = json.loads(cleaned_text)
# Check for wrapped structure (e.g. {"items": [...]}) if schema enforced it
if isinstance(raw_json, dict) and "items" in raw_json:
raw_json = raw_json["items"] # Extract inner list
if isinstance(raw_json, list):
for entry in raw_json:
seconds = parse_time_to_seconds(entry.get("time", "00:00"))
absolute_seconds = seconds + offset
entry["absolute_seconds"] = absolute_seconds
h = int(absolute_seconds // 3600)
m = int((absolute_seconds % 3600) // 60)
s = int(absolute_seconds % 60)
entry["display_time"] = f"{h:02}:{m:02}:{s:02}"
json_data.append(entry)
except Exception as e:
logger.error(f"JSON Parsing failed for chunk {i}: {e}. Raw text start: {result['raw_text'][:100]}")
# Save chunk result
db_chunk = TranscriptChunk(
meeting_id=meeting.id,
chunk_index=i,
raw_text=result["raw_text"],
json_content=json_data
)
db.add(db_chunk)
all_text.append(result["raw_text"])
db.commit()
# Phase 3: Finalize
meeting.status = "COMPLETED"
# Combine summary (first attempt - can be refined later with separate LLM call)
# meeting.summary = ...
db.commit()
logger.info(f"Meeting {meeting.id} processing completed.")
except Exception as e:
logger.error(f"Error processing meeting {meeting_id}: {e}", exc_info=True)
meeting.status = "ERROR"
db.commit()
finally:
db.close()
def retry_meeting_task(meeting_id: int, db_session_factory):
"""
Retries transcription using existing chunks on disk.
Avoids re-splitting the original file.
"""
db = db_session_factory()
meeting = db.query(Meeting).filter(Meeting.id == meeting_id).first()
if not meeting:
return
try:
import os
transcriber = TranscriptionService()
# 0. Validate Chunk Directory
chunk_dir = os.path.join(settings.UPLOAD_DIR, "chunks", str(meeting_id))
if not os.path.exists(chunk_dir):
logger.error(f"Chunk directory not found for meeting {meeting_id}")
meeting.status = "ERROR"
db.commit()
return
chunks = sorted([os.path.join(chunk_dir, f) for f in os.listdir(chunk_dir) if f.endswith(".mp3")])
if not chunks:
logger.error(f"No chunks found for meeting {meeting_id}")
meeting.status = "ERROR"
db.commit()
return
# Phase 1: Clear Old Chunks
meeting.status = "RETRYING"
db.query(TranscriptChunk).filter(TranscriptChunk.meeting_id == meeting_id).delete()
db.commit()
# Phase 2: Transcribe
all_text = []
for i, chunk_path in enumerate(chunks):
offset = i * settings.CHUNK_DURATION_SEC
logger.info(f"Retrying chunk {i+1}/{len(chunks)} with offset {offset}s")
result = transcriber.transcribe_chunk(chunk_path, offset)
# Parse JSON and Adjust Timestamps (Same logic as process_meeting_task)
json_data = []
try:
# With response_schema, raw_text SHOULD be valid JSON directly
# But let's keep clean_json_string just in case specific models deviate
cleaned_text = clean_json_string(result["raw_text"])
raw_json = json.loads(cleaned_text)
# Check for wrapped structure (e.g. {"items": [...]}) if schema enforced it
if isinstance(raw_json, dict) and "items" in raw_json:
raw_json = raw_json["items"] # Extract inner list
if isinstance(raw_json, list):
for entry in raw_json:
seconds = parse_time_to_seconds(entry.get("time", "00:00"))
absolute_seconds = seconds + offset
entry["absolute_seconds"] = absolute_seconds
h = int(absolute_seconds // 3600)
m = int((absolute_seconds % 3600) // 60)
s = int(absolute_seconds % 60)
entry["display_time"] = f"{h:02}:{m:02}:{s:02}"
json_data.append(entry)
except Exception as e:
logger.error(f"JSON Parsing failed for chunk {i}: {e}. Raw: {result['raw_text'][:100]}")
# Save chunk result
db_chunk = TranscriptChunk(
meeting_id=meeting.id,
chunk_index=i,
raw_text=result["raw_text"],
json_content=json_data
)
db.add(db_chunk)
all_text.append(result["raw_text"])
db.commit()
# Phase 3: Finalize
meeting.status = "COMPLETED"
db.commit()
logger.info(f"Meeting {meeting.id} retry completed.")
except Exception as e:
logger.error(f"Error retrying meeting {meeting_id}: {e}", exc_info=True)
meeting.status = "ERROR"
db.commit()
finally:
db.close()