Why Do I Receive Only the Recording Completion Callback But Not the Recording Start Callback After Configuring Recording Callbacks?

The parameter notify_event_subscription is not specified when you call the API for creating a recording callback. As a result, the default value RECORD_FILE_COMPLETE of this parameter is used and only the recording completion callback is sent. To receive the recording start callback, call the API for modifying a recording callback, and add the field RECORD_START to notify_event_subscription.