Cancel an outstanding request with id. This can either
be an outstanding async notification or a pending sync notification.
After this call, id cannot be used anymore to receive sync or
async notifications, you need to create a new GstClockID.
MT safe.
Cancel an outstanding request with id. This can either be an outstanding async notification or a pending sync notification. After this call, id cannot be used anymore to receive sync or async notifications, you need to create a new GstClockID. MT safe.