video-accessibility/backend/app/tasks
michael 6689778be7 feat: add dedicated TTS worker with parallel per-cue synthesis
Break out TTS synthesis into a dedicated Celery worker (tts queue) with
concurrency=8 for parallel processing. Each AD cue is now synthesized as
a separate task, enabling up to 8 cues to be processed simultaneously.

Key changes:
- Add tts_synthesis.py with synthesize_cue_task for per-cue synthesis
- Refactor translate_and_synthesize.py to dispatch cue tasks in parallel
- Add tts-worker service to docker-compose.yml (concurrency=8)
- Add Cloud Run service config for production deployment

Benefits:
- Parallel synthesis even for single jobs (e.g., 50 cues → 8 concurrent)
- Natural rate limiting across multiple concurrent jobs
- Fault tolerance with per-cue retries and GCS persistence

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
2025-12-30 14:23:11 -06:00
..
__pycache__ removed mongodb change stream monitoring, added global websockets monitoring for notifications, broke symmetry between toasts and persistent notifications (and refined which notifications get sent and how) 2025-08-25 15:48:18 -05:00
__init__.py feat: add dedicated TTS worker with parallel per-cue synthesis 2025-12-30 14:23:11 -06:00
ffmpeg_operations.py feat: add dedicated ffmpeg queue to prevent server overload 2025-12-26 17:56:23 -06:00
ingest_and_ai.py fix: broadcast WebSocket updates for ingesting and ai_processing status 2025-12-27 07:38:25 -06:00
notify.py added websockets for live job status updates with toast notifications on job list page 2025-08-24 19:41:23 -05:00
render_accessible_video.py refactor: rewrite pause point refinement algorithm with ordered logic 2025-12-29 08:19:03 -06:00
translate_and_synthesize.py feat: add dedicated TTS worker with parallel per-cue synthesis 2025-12-30 14:23:11 -06:00
tts_synthesis.py feat: add dedicated TTS worker with parallel per-cue synthesis 2025-12-30 14:23:11 -06:00
whisper_transcribe.py fix: use dedicated whisper worker with FFmpeg dispatch pattern 2025-12-27 08:53:53 -06:00