1. A moving image processing apparatus comprising: an encoder unit configured to include a plurality of encoders which encode a plurality of divided images respectively to generate encoded divided image data, wherein each of images of a moving image is divided into the plurality of divided images such that each of the plurality of divided images includes an overlapped area with an adjacent divided image of the plurality of divided images; 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 each of images of the moving image, wherein the composition unit determines a blend ratio of the overlapped area of the adjacent divided images based on a number of the motion vectors in the overlapped area of each of the adjacent divided images.