Video effects play an important role in adding production value to video programs. The use of video effects with Internet Video sources, however, is
still uncommon because traditional hardware-based solutions are poorly suited to the Internet environment. In previous work, we described a parallel,
software-only video effects system designed for Internet Video and explored the use of temporal parallelism. This paper explores the use of spatial
parallelism. In particular, an intermediate semicompressed video format is desribed that was designed to exploit spatial parallelism, and performance
measurements are reported on the use of this representation.