Transcription Log Observer

Logging speech-to-text transcription activity in Pipecat

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

Frame Types Monitored

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

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

Usage

from pipecat.observers.loggers.transcription_log_observer import TranscriptionLogObserver

worker = PipelineWorker(
    pipeline,
    params=PipelineParams(
        observers=[TranscriptionLogObserver()],
    ),
)

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.