iStream Studio can be setup in different recording modes depending on the server type selected.

Default canvas mode is enabled. With canvas enabled you will be able to perform automatic slide detection.

For Kaltura and (s)FTP this will be done by the recorder in the postprocessing after you stop recording. In Presentations2Go mode, slide detection is done server side.

Slide detection will be disabled when you disable canvas (turn on) in the advanced settings.