By referring to the example of MPP vdec below, four-way decoding, then four split screen output, is ok, but I now need to dynamically switch, any of the four screen according to the need to switch to full screen, all the way I pass HI_MPI_VO_SetAttrBegin> HI_MPI_VO_HideChn hide all showed that> HI_MPI_VO_SetChnAttr will I need a full screen that window is adjusted for full screen,> HI_MPI_VO_ShowChn> HI_MPI_VO_SetAttrEnd way to deal with, however, shows four split screen