Kokoro TTS, Whisper STT, FFmpeg conversion, WhatsApp Media API, OGG/OPUS delivery.
The two-step upload → send flow, MIME type requirements (audio/ogg; codecs=opus), delivery status callbacks, and the silent succes…
WAV → OGG/OPUS: the full annotated command. Bitrate choices for voice (48k VBR Opus). Detecting actual format with the file comman…
Test each step independently: TTS, conversion, upload, send. Meta delivery status as ground truth. Decoding common error codes (13…
Create in /tmp with random names, always unlink in finally blocks, PHP register_shutdown_function for emergency cleanup, and monit…
Stripping WhatsApp markdown (/u flag required), expanding legal abbreviations for natural pronunciation, converting bullet lists t…
Everything about voice AI in production: WhatsApp Media API, FFmpeg, OGG/OPUS, temp file lifecycle, and TTS text preparation.
Building a production-grade multi-tenant AI chatbot with FastAPI, Ollama, ChromaDB, Celery, and Redis.
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