Add better error handling for OpenAIRealtimeBetaLLMService truncate errors

CHANGELOG.md

@@ -14,6 +14,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Changed
 
+- Add defensive error handling for `OpenAIRealtimeBetaLLMService`'s audio
+  truncation. Audio truncation errors during interruptions now log a warning
+  and allow the session to continue instead of throwing an exception.
+
 - Modified `TranscriptProcessor` to use TTS text frames for more accurate assistant
   transcripts. Assistant messages are now aggregated based on bot speaking boundaries
   rather than LLM context, providing better handling of interruptions and partial

src/pipecat/services/openai_realtime_beta/openai.py

@@ -167,8 +167,11 @@ async def _truncate_current_audio_response(self):
         either the wall clock time or the actual audio duration to prevent invalid truncation
         requests.
         """
+        if not self._current_audio_response:
+            return
+
         # if the bot is still speaking, truncate the last message
-        if self._current_audio_response:
+        try:
             current = self._current_audio_response
             self._current_audio_response = None
 
@@ -179,13 +182,21 @@ async def _truncate_current_audio_response(self):
             elapsed_ms = int(time.time() * 1000 - current.start_time_ms)
             truncate_ms = min(elapsed_ms, audio_duration_ms)
 
+            logger.trace(
+                f"Truncating audio: duration={audio_duration_ms}ms, "
+                f"elapsed={elapsed_ms}ms, truncate={truncate_ms}ms"
+            )
+
             await self.send_client_event(
                 events.ConversationItemTruncateEvent(
                     item_id=current.item_id,
                     content_index=current.content_index,
                     audio_end_ms=truncate_ms,
                 )
             )
+        except Exception as e:
+            # Log warning and don't re-raise - allow session to continue
+            logger.warning(f"Audio truncation failed (non-fatal): {e}")
 
     #
     # frame processing