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fix(lemonslice): bind avatar audio output before the upstream session HTTP call #5837

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Merged
theomonnom merged 1 commit into from
May 25, 2026
Merged

fix(lemonslice): bind avatar audio output before the upstream session HTTP call #5837

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23 changes: 14 additions & 9 deletions livekit-plugins/livekit-plugins-lemonslice/livekit/plugins/lemonslice/avatar.py
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Original file line number Diff line number Diff line change
Expand Up @@ -98,6 +98,20 @@ async def start( # type: ignore[override]
.to_jwt()
)

# Rebind audio output BEFORE the slow upstream HTTP call so
# subsequent generations are routed to the (about-to-arrive)
# avatar identity immediately. wait_remote_track buffers
# frames until the video track shows up, so nothing is lost
# in the gap.
agent_session.output.audio = DataStreamAudioOutput(
room=room,
destination_identity=self._avatar_participant_identity,
sample_rate=SAMPLE_RATE,
wait_remote_track=rtc.TrackKind.KIND_VIDEO,
clear_buffer_timeout=None,
wait_playback_start=True,
)

async with LemonSliceAPI(
api_url=self._api_url,
api_key=self._api_key,
Expand All @@ -115,13 +129,4 @@ async def start( # type: ignore[override]
extra_payload=self._extra_payload,
)

agent_session.output.audio = DataStreamAudioOutput(
room=room,
destination_identity=self._avatar_participant_identity,
sample_rate=SAMPLE_RATE,
wait_remote_track=rtc.TrackKind.KIND_VIDEO,
clear_buffer_timeout=None,
wait_playback_start=True,
)

return session_id
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