# AndNotThen Engine

The `AndNotThen` engine is the same as the AndNot engine, except for the following differences:

- Records in the additional tracks that start before the record in the `Input0` track are ignored and do not prevent the record in the `Input0` track being added to the output. In other words, the `AndNotThen` engine enforces an additional TimestampCondition (in addition to any conditions that you specify):

  `startX >= start0`

- This engine is available only for processing video. It is not supported with images and documents.

_FT_HTML5_bannerTitle.htm