Abstract: Techniques and devices for acquiring and compressing timelapse video are described. The techniques are adaptive, in that the acquisition frame rate is adapted and captured images are periodically deleted during filming. To implement the method, a user need not know ahead of time how long the source video will be acquired. Regardless of the acquisition time, the resulting video is automatically edited to provide a timelapse clip of a predefined length or of a length within a predefined range.

Abstract: An electronic device with a display and, optionally, a touch-sensitive surface obtains a collection of media items. In some embodiments, the device determines one or more patterns in the collection based on a comparison between properties of sequentially adjacent items and divides the collection into multiple events that includes a plurality of multi-item events. In some embodiments, the device receives a first request to display a first portion of the collection organized in accordance with a first detailed-granularity level and, in response to the first request, displaying a first plurality of representations of the items. The device receives a second request to display a second portion of the collection organized in accordance with a respective overview-granularity level that corresponds to multiple detailed-granularity levels and, in response to the second request, displays a second plurality of representations of the items.