Yes, it is possible to remotely start/stop a Vicon Capture Session using MATLAB. To do this, you need to:
1. Load the Vicon SDK in MATLAB using the `actxserver` command.
2. Connect to the Vicon server using the `Connect` method.
3. Use the `StartCapture` method to start the Vicon capture session.
4. Use the `StopCapture` method to stop the capture session.
5. Disconnect from the Vicon server using the `Disconnect` method.
After writing the MATLAB code to start/stop the Vicon capture session, you can call it from your other software using MATLAB's COM automation server capabilities.