Scenic Live Streams (SLS), capturing real-world scenic sites from fixed cameras without streamers, have gained increasing popularity recently. They afford unique real-time lenses into remote sites for viewers' synchronous and collective engagement. Foregrounding its lack of dynamism and interactivity, we aim to maximize the potential of SLS by making it interactive. Namely MRSLS, we overlaid plain SLS with interactive Mixed Reality content that matches the site's geographical structures and local cultural backgrounds. We further highlight the substantial benefit of MRSLS to cultural heritage site interactions, and we demonstrate this design proposal with an MRSLS prototype at a UNESCO-listed heritage site in China. The design process includes an interview (N=6) to pinpoint local scenery and culture, as well as two iterative design studies (N=15, 14). A mixed-methods, between-subjects study (N=43, 37) shows that MRSLS affords immersive scenery appreciation, effective cultural imprints, and vivid shared experience. With its balance between cultural, participatory, and authentic attributes, we appeal for more HCI attention to (MR)SLS as an under-explored design space.

翻译：风景直播（SLS）通过固定摄像头捕捉真实世界风景点，无需主播参与，近年来日益受到欢迎。它为观众提供了独特的实时视角，使其能够同步、集体地参与远程场景。针对其缺乏动态性和交互性的问题，我们旨在通过赋予其交互性来最大化SLS的潜力。具体而言，我们提出了MRSLS，在普通SLS基础上叠加了与场地地理结构和当地文化背景相匹配的交互式混合现实内容。我们进一步强调了MRSLS在文化遗产地交互中的显著优势，并通过在中国一处联合国教科文组织遗产地开发的MRSLS原型系统验证了这一设计方案。设计过程包括一项访谈（N=6）以确定当地风景与文化特征，以及两项迭代设计研究（N=15、14）。一项混合方法、组间对照研究（N=43、37）表明，MRSLS能够提供沉浸式景观欣赏、有效的文化印记和生动的共享体验。凭借其在文化性、参与性和真实性之间的平衡，我们呼吁人机交互领域更多关注（MR）SLS这一尚未充分探索的设计空间。