The recent development of three dimensional (3D) display technologies has resulted in a proliferation of 3D video production and broadcasting, attracting a lot of research into capture, compression and delivery of stereoscopic content. However, the predominant design practice of interactions with 3D video content has failed to address its differences and possibilities in comparison to the existing 2D video interactions. This paper presents a study of user requirements related to interaction with the stereoscopic 3D video. The study suggests that the change of view, zoom in/out, dynamic video browsing, and textual information are the most relevant interactions with stereoscopic 3D video. In addition, we identified a strong demand for object selection that resulted in a follow-up study of user preferences in 3D selection using virtual-hand and ray-casting metaphors. These results indicate that interaction modality affects users’ decision of object selection in terms of chosen location in 3D, while user attitudes do not have significant impact. Furthermore, the ray-casting-based interaction modality using Wiimote can outperform the volume-based interaction modality using mouse and keyboard for object positioning accuracy. 1. Introduction With the recent development of 3D stereoscopic display technology, 3D movies and 3D TV programmes are becoming a commonplace in our everyday lives. The launch of a number of broadcasted 3D channels, such as Sky 3D and BBC HD, TV viewers can immerse into 3D experience in their own living room. There has been a significant amount of ongoing related research into 3D content capture, production, and delivery. However, to the best of our knowledge, there has been very little research towards meaningful user interaction with real 3D video content. In terms of interaction design, there has been no evidence of differentiation between 2D and 3D video content. However, compared to the 2D video content, 3D video provides an additional viewing dimension and thus offers more immersive experience to the audience. Given this crucial characteristic of 3D video medium, surprisingly little attention has been dedicated towards developing an intuitive interactive technique for 3D video. The aim of our research is to study user practices and propose technical solutions and design guidelines to develop intuitive interaction for 3D video content. In this paper, we follow the methodology outlined in our previous paper [1] by initially eliciting user requirements of stereoscopic 3D video interaction with an emphasis on potential interactive
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