What Google Meet live captions actually are
Google Meet has its own on-device-style speech recognizer that produces the captions you see at the bottom of a call. Those captions are streamed inside the meeting over a WebRTC data channel — they are real structured data, not pixels on the screen. Tools that read them at the source (like MeetConnect) get a clean, speaker-attributed live transcript for free, because Google is doing the recognition.
The catch is that Meet decodes captions in one selected caption language at a time. If a speaker switches languages mid-sentence — or reads an English term aloud during a Persian conversation — Meet keeps decoding in the language it was set to, so that stretch is dropped or phonetically mangled.
What AI transcription adds
AI transcription records the meeting audio and runs a speech model over it — in MeetConnect's case, Google's Gemini models over the recorded .webm. Because the model sees the whole audio (not a single live language setting), it can transcribe each part in the language actually spoken, keep technical terms intact, and re-diarize speakers.
- Higher accuracy on hard audio, cross-talk, and accents.
- Mixed-language support — the model keeps Persian in Persian and English in English instead of forcing one script.
- A durable archive you can search, summarize, and turn into action items.
The trade-off is that it is a post-meeting step: it costs compute (your own API key or a managed tier), takes time proportional to meeting length, and needs the audio to be recorded in the first place.
Side-by-side comparison
| Live captions | AI transcription | |
|---|---|---|
| Timing | Instant, during the call | After the call (or mid-call on demand) |
| Cost | Free (Google does it) | Compute / API cost |
| Language | One selected language | Mixed-language, as spoken |
| Accuracy | Good, but fragile on switches | Higher, whole-audio context |
| Speakers | Attributed live | Re-diarized from audio |
| Needs audio recording? | No | Yes |
When to use which
- 1.Use live captions when you want a running, zero-cost record you can read and export as
.txtthe moment the call ends, and the meeting is in a single language. - 2.Use AI transcription when accuracy matters, the meeting mixes languages, or you need a searchable archive, summaries, or action items.
- 3.Use both — capture captions live for free, then run an AI pass on the recording for the archive. This is the default MeetConnect workflow.
For a hands-on setup, see How to record and transcribe Google Meet meetings locally. If your meetings mix Persian and English, read the mixed-language challenges.