how to record both video and unmixed audio of a group call

Try below as a workaround:

1. Split the Recording Logic

• Record the mixed audio-video using ACS's built-in recording.
• Simultaneously use audio streaming APIs to capture unmixed audio in real time.
• This requires setting up a bot or server-side logic to subscribe to individual audio streams.

2. Post-Processing Separation

• Record the full mixed audio-video stream.
• Use audio processing tools (e.g., Adobe Audition, Audacity, or custom ML models) to attempt separation of individual voices.

3. Parallel Calls with Different serverCallIds

• If feasible, create two parallel calls with different serverCallIds:
• One for video recording
• One for unmixed audio
• This is complex and may not be practical for real-time meetings.