OBS Studio native transcription plugin

[lukeocodes]

Native C/C++ plugin — hooks directly into OBS's audio pipeline using obs_source_add_audio_capture_callback, captures raw PCM frames at the mix sample rate, resamples to 16kHz mono, and streams to Deepgram live WebSocket. Surfaces transcripts as an OBS text source (live captions overlay) and optionally writes an SRT file alongside the recording.

Ships as a .so (Linux), .dll (Windows), .dylib (macOS). No browser involved.

This is a native integration — there is no Deepgram OBS SDK. The plugin would use libwebsockets or libcurl for the WebSocket connection and the Deepgram REST/WebSocket API directly.

Credentials likely needed

• DEEPGRAM_API_KEY (embedded in plugin settings UI)

Language

C/C++

[github-actions]

This looks like it's already covered — see:

• Queue: OBS Studio live captioning plugin (C/C++ + Deepgram STT) #147 — Queue: OBS Studio live captioning plugin (C/C++ + Deepgram STT)

That issue is already queued for the Engineer to build. Feel free to add more context there if you have a different angle in mind!