Emit a transcription callback when receiving a CancelFrame, update examples accordingly

examples/foundational/28a-transcription-processor-openai.py

@@ -16,8 +16,7 @@ from runner import configure
 
 from pipecat.audio.vad.silero import SileroVADAnalyzer
 from pipecat.frames.frames import (
-    EndFrame,
+    CancelFrame,
-    StartInterruptionFrame,
     TranscriptionMessage,
     TranscriptionUpdateFrame,
 )
@@ -170,10 +169,8 @@ async def main():
 
         @transport.event_handler("on_participant_left")
         async def on_participant_left(transport, participant, reason):
-            # Interrupt the TTS to stop the TTS generation
+            # Stop the pipeline immediately when the participant leaves
-            await task.queue_frame(StartInterruptionFrame())
+            await task.queue_frame(CancelFrame())
-            # Stop the gracefully stop the pipeline
-            await task.queue_frame(EndFrame())
 
         runner = PipelineRunner()
 

examples/foundational/28b-transcript-processor-anthropic.py

@@ -16,8 +16,7 @@ from runner import configure
 
 from pipecat.audio.vad.silero import SileroVADAnalyzer
 from pipecat.frames.frames import (
-    EndFrame,
+    CancelFrame,
-    StartInterruptionFrame,
     TranscriptionMessage,
     TranscriptionUpdateFrame,
 )
@@ -170,10 +169,8 @@ async def main():
 
         @transport.event_handler("on_participant_left")
         async def on_participant_left(transport, participant, reason):
-            # Interrupt the TTS to stop the TTS generation
+            # Stop the pipeline immediately when the participant leaves
-            await task.queue_frame(StartInterruptionFrame())
+            await task.queue_frame(CancelFrame())
-            # Stop the gracefully stop the pipeline
-            await task.queue_frame(EndFrame())
 
         runner = PipelineRunner()
 

examples/foundational/28c-transcription-processor-gemini.py

@@ -16,8 +16,7 @@ from runner import configure
 
 from pipecat.audio.vad.silero import SileroVADAnalyzer
 from pipecat.frames.frames import (
-    EndFrame,
+    CancelFrame,
-    StartInterruptionFrame,
     TranscriptionMessage,
     TranscriptionUpdateFrame,
 )
@@ -180,10 +179,8 @@ async def main():
 
         @transport.event_handler("on_participant_left")
         async def on_participant_left(transport, participant, reason):
-            # Interrupt the TTS to stop the TTS generation
+            # Stop the pipeline immediately when the participant leaves
-            await task.queue_frame(StartInterruptionFrame())
+            await task.queue_frame(CancelFrame())
-            # Stop the gracefully stop the pipeline
-            await task.queue_frame(EndFrame())
 
         runner = PipelineRunner()
 

src/pipecat/processors/transcript_processor.py

@@ -10,6 +10,7 @@ from loguru import logger
 
 from pipecat.frames.frames import (
     BotStoppedSpeakingFrame,
+    CancelFrame,
     EndFrame,
     Frame,
     StartInterruptionFrame,
@@ -115,6 +116,7 @@ class AssistantTranscriptProcessor(BaseTranscriptProcessor):
         - BotStoppedSpeakingFrame: Completes current utterance
         - StartInterruptionFrame: Completes current utterance due to interruption
         - EndFrame: Completes current utterance at pipeline end
+        - CancelFrame: Completes current utterance due to cancellation
 
         Args:
             frame: Input frame to process
@@ -129,7 +131,7 @@ class AssistantTranscriptProcessor(BaseTranscriptProcessor):
 
             self._current_text_parts.append(frame.text)
 
-        elif isinstance(frame, (BotStoppedSpeakingFrame, StartInterruptionFrame)):
+        elif isinstance(frame, (BotStoppedSpeakingFrame, StartInterruptionFrame, CancelFrame)):
             # Emit accumulated text when bot finishes speaking or is interrupted
             await self._emit_aggregated_text()