Merge pull request #1579 from pipecat-ai/fixing_smallwebrtc_issue

Fixed an issue in `SmallWebRTCTransport`

CHANGELOG.md

@@ -5,6 +5,14 @@ All notable changes to **Pipecat** will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+
+## [Unreleased]
+
+### Fixed
+
+- Fixed an issue in `SmallWebRTCTransport` where an error was thrown if the 
+  client did not create a video transceiver.
+
 ## [0.0.63] - 2025-04-11
 
 ### Added

src/pipecat/transports/network/webrtc_connection.py

@@ -219,7 +219,9 @@ class SmallWebRTCConnection(BaseObject):
             await self._call_event_handler("connected")
             # We are renegotiating here, because likely we have loose the first video frames
             # and aiortc does not handle that pretty well.
-            await self.video_input_track().discard_old_frames()
+            video_input_track = self.video_input_track()
+            if video_input_track:
+                await self.video_input_track().discard_old_frames()
             self.ask_to_renegotiate()
 
     async def renegotiate(self, sdp: str, type: str, restart_pc: bool = False):