EDIUS has automatic scene detection when capturing from tape, by default. If EDIUS detects any scene, it will automatically create a new clip at the start of the new scene.
To capture video as a single clip, disable scene detection in the System Settings as follows:

1. Choose [Settings] > [System Settings].
2. System Settings window will appear. Choose [Application] > [Captue] in the left-pane.
3. Disable all event options of “Automatic Detection of Capture Events” in the right-pane.