FWIW, AssemblyAI has great trasncript quality in my experience, and they support streaming: https://www.assemblyai.com/docs/walkthroughs#realtime-stream...
It has great quality transcription from video and audio (in English only sorry if that's not you!). Uses Whisper.cpp plus VAD to skip silent / non-speech sections which introduce errors normally. Give a try let me know what you think! :)
It’s based on a finetuned Whisper and you’d get unlimited transcriptions for $4.99/month