You can capture live from any non-controlled source. A non-controlled source is any source with an SDI Out, such as another Lustre workstation, or a Smoke or Flame workstation. For example, you have footage residing on a Flame workstation that you need. You can connect to that workstation and input the footage directly, without going through tape output and input.
To perform a live capture from a non-controlled source:
This is done in order to set the duration of the capture. The values can be anything, as long as they reflect the desired duration.