We propose a new interface that facilitates content navigation in videos on devices with touchscreen interaction. This interface allows both coarse-grained and fine-grained navigation in an intuitive way and enables better performance when used to locate specific scenes in videos. We implemented this interface on a 5.5-inch smartphone and tested it with 24 users. Our results show that for video navigation tasks the proposed interface significantly outperforms the seekerbar interface, commonly used with video players on mobile devices. Moreover, we found that the interaction concept of the Scrubbing Wheel has a much lower perceived workload than the widely used seeker-bar, and is the preferred tool to locate scenes in videos for all tested users in our study.
In this work, the authors present a video navigation interface optimized for smartphones. The design is inspired by the 'Click Wheel' interface originally used by Apple iPod TM devices: it utilizes a dedicated touch-enabled circular area that can be used with wipe gestures for content navigation in videos. The user winds clockwise to navigate forward and winds counter-clockwise to navigate backward. The authors evaluate this interface in direct comparison to the default video player interface on Apple smartphones and show that the proposed interface significantly outperforms the default video player in terms of search performance (i.e., in the amount of retrieved scenes for content search tasks). Furthermore, the evaluation of subjective workload shows that this 'Scrubbing Wheel' interface produces significantly less mental, physical, and temporal demand, and provides significantly better support for content search in videos. Also, users can perform smoother navigation in video and perceive the interface as more fun to use.
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