Merge pull request #3828 from pipecat-ai/mb/skip-empty-audio-filter-frames

Skip empty audio frames after filter buffering

changelog/3828.fixed.md

@@ -0,0 +1 @@
+- Fixed misleading "Empty audio frame received for STT service" warnings when using audio filters (e.g. `RNNoiseFilter`, `KrispVivaFilter`, `AICFilter`) that buffer audio internally.

src/pipecat/transports/base_input.py

@@ -424,6 +424,11 @@ class BaseInputTransport(FrameProcessor):
                 if self._params.audio_in_filter:
                     frame.audio = await self._params.audio_in_filter.filter(frame.audio)
 
+                # Skip frames with no audio data (e.g. filter is buffering).
+                if not frame.audio:
+                    self._audio_in_queue.task_done()
+                    continue
+
                 ###################################################################
                 # DEPRECATED.
                 #