Merge pull request #2348 from sam-s10s/speechmatics-stt

Fix for Speechmatics STT

CHANGELOG.md

@@ -21,6 +21,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Fixed an issue with the `TavusVideoService` where an error was thrown due to
   missing transcription callbacks.
 
+- Fixed an issue in `SpeechmaticsSTTService` where the `user_id` was set to
+  `None` when diarization is not enabled.
+
 ### Performance
 
 - Fixed an issue in `TaskObserver` (a proxy to all observers) that was degrading

examples/foundational/13h-speechmatics-transcription.py

@@ -49,7 +49,7 @@ async def run_bot(transport: BaseTransport):
     This example will use diarization within our STT service and output the words spoken by
     each individual speaker and wrap them with XML tags.
 
-    If you do not wish to use diarization, then set the `enable_speaker_diarization` parameter
+    If you do not wish to use diarization, then set the `enable_diarization` parameter
     to `False` or omit it altogether. The `text_format` will only be used if diarization is enabled.
 
     By default, this example will use our ENHANCED operating point, which is optimized for

src/pipecat/services/speechmatics/stt.py

@@ -191,7 +191,7 @@ class SpeakerFragments:
             passive_format = active_format
         return {
             "text": self._format_text(active_format if self.is_active else passive_format),
-            "user_id": self.speaker_id,
+            "user_id": self.speaker_id or "",
             "timestamp": self.timestamp,
             "language": self.language,
             "result": [frag.result for frag in self.fragments],