In the last few years, there has been a tremendous increase in mobile video content generation and delivery. This trend has forced the service providers to understand the limitations of the current wired and wireless networks (Internet, WiFi, 3G/4G cellular) and bring new technologies for delivering the video content to the end-user. Last mile access technologies play a crucial role in determining the overall performance and end-user experience of multimodal applications; diverse approaches and technologies (WiMAX, LTE) have recently gained momentum to address this issue. Moreover, offering high quality mobile video services on resource-constrained and heterogeneous mobile devices with varying display sizes, processing powers, network conditions, and battery levels opens up many new challenges.

Recent developments such as social media production, multimodal sensing and context technologies, will have an impact on mobile video applications. In fact, supporting a broad spectrum of video-centric applications such as live video streaming, VoD, video games and virtual environments (e.g., Second Life), multimedia conferencing and telepresence, surveillance, sensing and social media on mobile devices demands application-specific techniques that adapt to the underlying network and device architectures.

Movid 2012 is the fourth edition of the workshop. The previous workshops were held in Newport Beach, CA (2008), Rio de Janeiro, Brazil (2009) and Firenze, Italy (2010).