Fix request_image_frame and usage

examples/foundational/14e-function-calling-google.py

@@ -68,13 +68,7 @@ async def get_image(params: FunctionCallParams):
         text_content=question,
     )
 
-    # Wait a short time for the frame to be processed
-    await asyncio.sleep(0.5)
-
-    # Return a result to complete the function call
-    await params.result_callback(
-        f"I've captured an image from your camera and I'm analyzing what you asked about: {question}"
-    )
+    await params.result_callback(None)
 
 
 # We store functions so objects (e.g. SileroVADAnalyzer) don't get

examples/foundational/20d-persistent-context-gemini.py

@@ -74,6 +74,8 @@ async def get_image(params: FunctionCallParams):
         text_content=question,
     )
 
+    await params.result_callback(None)
+
 
 async def get_saved_conversation_filenames(params: FunctionCallParams):
     # Construct the full pattern including the BASE_FILENAME
@@ -257,7 +259,7 @@ async def run_bot(transport: BaseTransport, runner_args: RunnerArguments):
         voice_id="71a7ad14-091c-4e8e-a314-022ece01c121",  # British Reading Lady
     )
 
-    llm = GoogleLLMService(model="gemini-2.0-flash-001", api_key=os.getenv("GOOGLE_API_KEY"))
+    llm = GoogleLLMService(api_key=os.getenv("GOOGLE_API_KEY"))
 
     # you can either register a single function for all function calls, or specific functions
     # llm.register_function(None, fetch_weather_from_api)

src/pipecat/services/llm_service.py

@@ -519,6 +519,7 @@ class LLMService(AIService):
             UserImageRequestFrame(
                 user_id=user_id,
                 text=text_content,
+                append_to_context=True,
                 # Deprecated fields below.
                 function_name=function_name,
                 tool_call_id=tool_call_id,