If you are planing on using the Live Stream Record API, from the Engine Manager GUI, then you would:
1: Use a StreamType of "live", leave "record all streams" unchecked.
2: In the Application Properties tab, under the "StreamRecorder Defaults" tab set the "streamRecorderVersioningOption" to "append" save and restart the application.
3: In the left side bar of the Engine Manger window, (with the live stream being published) choose "Incoming Streams" and select the incoming stream to record
4:Click on the red "record" button(circle) to see the recording options, click on the "Segmentation" tab to confirm that "Segmentation Option" is set to none, and "Versioning Option" is set to "Append to existing file". Click record.