Azure Communication Services - Python SDK Call Media not working with CallConnectionClient

Hi team,

I’m working on a FastAPI service that uses Azure Communication Services Call Automation (Python SDK) to handle outbound PSTN calls and real-time speech interaction.

So far it is able to make phone calls but not able to do media handling part during conversation.

Environment:

Python version: 3.12-slim
Package: azure-communication-callautomation (version: 1.4.0)
Hosting: Azure Container Apps
speech cognitive resource is connected to azure communication services
https://drive.google.com/file/d/1uC2S-LNx_Ybpp1QwOCtqFS9pwA84mK7h/view?usp=drive_link

What I’m trying to do:

Place an outbound call to a PSTN number
Play a greeting (TextSource) when the call is connected
Start continuous speech recognition, forward transcript to an AI endpoint, then play the response back

Code snippet:

# Play greeting
            try:
                call_connection = client.get_call_connection(call_id)
                call_media = call_connection.call_media()
                call_media.play_to_all(
                    play_source,
                    operation_context="welcome-play"
                )
                print("Played welcome greeting.")
            except Exception as e:
                print("Play Greeting Failed: ", str(e))

# start Recognition
participants = list(call_connection.list_participants())
for p in participants:
    if isinstance(p.identifier, PhoneNumberIdentifier):
    active_participants[call_id] = p.identifier
        try:
            call_connection = client.get_call_connection(call_id)
            call_media = call_connection.call_media()
            call_media.start_recognizing_media(
                target_participant=p.identifier,
                input_type="speech",
                interrupt_call_media_operation=True,
                operation_context="speech-recognition"
            )
            print("Started recognition immediately after call connected.")
        except Exception as e:
            print("Recognition start failed:", str(e))
        break
    target_participant = active_participants.get(call_id)
    if not target_participant:
        print(f"No PSTN participant found for call {call_id}, skipping recognition.")

Issue:
When the CallConnected event fires,, I get different errors depending on which method I try:

• 'CallConnectionClient' object has no attribute 'call_media'
• 'CallConnectionClient' object has no attribute 'get_call_media_operations'
• 'CallConnectionClient' object has no attribute 'play_to_all'
• 'CallConnectionClient' object has no attribute 'get_call_media_client'
• 'CallConnectionClient' object has no attribute 'get_call_media'

Also some import errors:

• ImportError: cannot import name 'PlayOptions' from 'azure.communication.callautomation'
• ImportError: cannot import name 'RecognizeOptions' from 'azure.communication.callautomation'
• ImportError: cannot import name 'CallMediaRecognizeOptions' from 'azure.communication.callautomation'
• ImportError: cannot import name 'CallConnection' ... Did you mean: 'CallConnectionState'?

This makes me unsure which API is the correct/updated way to access play_to_all and start_recognizing_media.

https://drive.google.com/file/d/1xI-sWil0OKfAfGwjIgG25eD7CEK95rKc/view?usp=drive_link

Questions:

• What is the current supported way to access call media operations (play / speech recognition) in the Python SDK?
• Are there breaking changes between SDK versions that I should be aware of?
• Should I upgrade to a specific minimum version to ensure .call_media works?

Thanks in advance!