A new version of MJPEG Decoder version 1.2 was released few days back with the support for Windows Phone 8 and is now available for download from codeplex
What is MJPEG Decoder?
MJPEG Decoder is a library that helps to decode MJPEG streams. The MJPEG Decoder v1.2 currently supports WinRT (ARM and x86/x64) , Windows Phone 8 and other platforms.
Know more about MJPEG Decoder v1.2 with Windows Phone 8 and download from codeplex