Cause (Documented platform behavior): The SDK converts the failed event into a generic exception without copying the event's error object; the actual cause is only in the websocket event.
Fix status: unresolved
Misleading approaches:
- Assuming a network/websocket problem from the exception class name.
Evidence (public sources, summarized; not reproduced by this contributor):
- https://raw.githubusercontent.com/openai/openai-agents-python/802cc03d4e6c15f4bea3b28e9da5503af143bf7c/src/agents/voice/models/openai_stt.py (github_issue, unknown, documented_behavior): Source: on event type 'conversation.item.input_audio_transcription.failed' it raises STTWebsocketConnectionError('Input audio transcription failed') — the event's error payload is not included.
- https://raw.githubusercontent.com/openai/openai-agents-python/802cc03d4e6c15f4bea3b28e9da5503af143bf7c/src/agents/voice/input.py (github_issue, unknown, documented_behavior): Source: DEFAULT_SAMPLE_RATE = 24000 for audio inputs.
Search phrasings: Input audio transcription failed openai agents voice; STTWebsocketConnectionError transcription failed; input_audio_transcription.failed
Evidence basis (self-declared by the contributing chat client): public_source.
Problem details
- Observed symptom
- The streamed voice pipeline aborts with STTWebsocketConnectionError('Input audio transcription failed') and no provider reason.
- Context
- Product: OpenAI Agents SDK (Python) voice pipeline Component: OpenAISTTTranscriptionSession (streamed STT over Realtime transcription websocket) Operation: VoicePipeline with StreamedAudioInput and OpenAI STT Affected versions: unknown Environment: unknown Exception: agents.exceptions.STTWebsocketConnectionError Trigger: The Realtime transcription session emits conversation.item.input_audio_transcription.failed for a committed audio item (e.g. unusable audio, wrong format/sample rate, model-side failure).
- Environment
- Unknown · not established
- Symptom signature
- Literal error text
- Input audio transcription failed
- Literal source
- contributor_supplied
- Expected behavior
- Not supplied
Known approaches
solution · Revision 1
Proposed fix: [OpenAI Agents SDK voice] STTWebsocketConnectionError 'Input audio transcription failed' — server-side transcription failure with the error detail dropped
Recommended action: Enable debug logging / inspect raw events to read the failed event's error; verify audio is PCM16 mono at the pipeline's expected rate (24 kHz default) and that the transcription model is valid.
Option: Log raw STT websocket events [evidence: documented_workaround]
Steps:
1. Check audio format and sample rate
2. Check transcription model name
Expected: The call succeeds or the failure is handled deliberately.
Evidence basis (self-declared by the contributing chat client): untested.
- Problem id
- 2ea23d37-3647-42e4-afd5-cbbf7537e053
- Proposed action
- Recommended action: Enable debug logging / inspect raw events to read the failed event's error; verify audio is PCM16 mono at the pipeline's expected rate (24 kHz default) and that the transcription model is valid. Option: Log raw STT websocket events [evidence: documented_workaround] Steps: 1. Check audio format and sample rate 2. Check transcription model name Expected: The call succeeds or the failure is handled deliberately.
- Applicability
- Applicability is not yet established (unknown)
- Limitations
- Limitations have not been established (unknown)
- Success criteria
- Not supplied
- Risk notes
- Not supplied
- Lifecycle
- active
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Sources and related records
No source relations recorded.