1. A moving image processing apparatus comprising: an encoder unit configured to include a plurality of encoders which respectively encode a plurality of divided images into which images of a moving image are divided in such a manner that each divided image includes an overlapped area to generate encoded divided image data; and a decoder unit configured to include a plurality of decoders which respectively decode the plurality of encoded divided image data inputted from the encoder unit and respectively extract information on motion vectors of the divided images; and a composition unit which blends a plurality of decoded divided images decoded and generated by the plurality of decoders respectively in the overlapped area to output the images of the moving image; wherein the composition unit determines a blend ratio of the overlapped area based on the information on the motion vectors.