The TranscriptionLogObserver logs all speech-to-text transcription activity in your Pipecat pipeline, providing visibility into both final and interim transcription results.

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Frame Types Monitored

The observer tracks the following frame types (only from STT service):

  • TranscriptionFrame: Final transcription results
  • InterimTranscriptionFrame: In-progress transcription results

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Usage

from pipecat.observers.loggers.transcription_log_observer import TranscriptionLogObserver

task = PipelineTask(
    pipeline,
    PipelineParams(
        observers=[TranscriptionLogObserver()],
    ),
)

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Log Output Format

The observer uses consistent formatting with emoji indicators:

  • 💬 [Source] → TRANSCRIPTION: [text] from [user_id]
  • 💬 [Source] → INTERIM TRANSCRIPTION: [text] from [user_id]

All log entries include timestamps for precise timing analysis.

RTVI ObserverPipeline Heartbeats