RNNoiseFilter: don't filter silence frames

Fixes #3259
2025-12-28 16:07:04 -08:00
2 changed files with 4 additions and 0 deletions
--- a/changelog/3309.fixed.md
+++ b/changelog/3309.fixed.md
@@ -0,0 +1 @@
+- Fixed a `RNNoiseFilter` issue that would cause a "[Errno 12] Cannot allocate memory" error when processing silence audio frames.
--- a/src/pipecat/audio/filters/rnnoise_filter.py
+++ b/src/pipecat/audio/filters/rnnoise_filter.py
@@ -115,6 +115,9 @@ class RNNoiseFilter(BaseAudioFilter):
        if self._sample_rate != 48000 and self._resampler_in:
            in_audio = await self._resampler_in.resample(audio, self._sample_rate, 48000)

+        if len(in_audio) == 0:
+            return audio
+
        # Convert bytes to numpy array (int16)
        audio_samples = np.frombuffer(in_audio, dtype=np.int16)
				`@@ -0,0 +1 @@`
				- Fixed a `RNNoiseFilter` issue that would cause a "[Errno 12] Cannot allocate memory" error when processing silence audio frames.