The invention relates to a streaming video to the pixel domain code, a computer multimedia technology areas, including: MPEG-2 video bit stream format for MPEG-2 decoder frame images and get all the current macro block MPEG-2 encoder motion vectors; Judging the present frame in MPEG - 2 format in the frame type, if I frame is directly MPEG-4 coding; If the frame is B or P frames, for each macro block, the decoder used by the MPEG-2 motion vectors were used campaign re-estimation method estimates from a number of motion vectors; reservations minimum residuals Heavily estimated motion vector and pixel scope of the semi-final thinning search campaign vector encoding; Acer block completion of the MPEG-4 coding; continue to the next frame decoding and transcoding processing. This invention based on the assumption that the campaign designed to better re-estimation methods to move swiftly to the scene, has effectively made up for the streaming video pixel domain transcoding methods used to be linear and deficiencies.