The document discusses video transcoding from MPEG-2 to MPEG-4 using Intel Integrated Performance Primitives (IPP). It describes how the transcoder works by partially decoding the MPEG-2 video, encoding it into MPEG-4, and reusing motion vectors to improve performance. Test results show the transcoded video achieves reasonable quality as measured by peak signal-to-noise ratio while nearly doubling the transcoding speed compared to without motion vector reuse.