vgs HI_MPI_VGS_AddCoverTask 执行失败

大神们，帮忙看看：执行HI_MPI_VGS_AddCoverTask，画框，空心框，实际yuv图片上没有框显示出来。提示的错误是：
<3>[   dis] [Func]:DIS_Process [Line]:975 [Info]:dis mod not ready
<3>[    vi] [Func]:VI_SubmitFrame2Dis [Line]:1402 [Info]:submit dis task failed ,0xa0118010!
<3>[   dis] [Func]:DIS_Process [Line]:975 [Info]:dis mod not ready
<3>[    vi] [Func]:VI_SubmitFrame2Dis [Line]:1402 [Info]:submit dis task failed ,0xa0118010!
<3>[   dis] [Func]:DIS_Process [Line]:975 [Info]:dis mod not ready
<3>[    vi] [Func]:VI_SubmitFrame2Dis [Line]:1402 [Info]:submit dis task failed ,0xa0118010!
<3>[   dis] [Func]:DIS_Process [Line]:975 [Info]:dis mod not ready
<3>[    vi] [Func]:VI_SubmitFrame2Dis [Line]:1402 [Info]:submit dis task failed ,0xa0118010!
<3>[   dis] [Func]:DIS_Process [Line]:975 [Info]:dis mod not ready
<3>[    vi] [Func]:VI_SubmitFrame2Dis [Line]:1402 [Info]:submit dis task failed ,0xa0118010!

代码是：

        s32Ret = HI_MPI_VGS_BeginJob(&hHandle);
        if ( s32Ret != HI_SUCCESS ) {
                printf("HI_MPI_VGS_BeginJob failed\n");
                hHandle = -1;
                //VPSS_Restore(Grp, Chn);
                return s32Ret;
        }

        memcpy(&stTask.stImgIn, pstFrame, sizeof(VIDEO_FRAME_INFO_S));
        memcpy(&stTask.stImgOut, pstFrame, sizeof(VIDEO_FRAME_INFO_S));
        //memcpy(&stTask.stImgOut , &stFrmInfo, sizeof(VIDEO_FRAME_INFO_S));
        VGS_ADD_COVER_S cover_s[2];
        memset(&cover_s, 0, sizeof(cover_s));
        int j = 0;
        for( j = 0; j < 2; j++) {
                cover_s[j].enCoverType = COVER_QUAD_RANGLE;
                cover_s[j].stQuadRangle.bSolid = 0;
                cover_s[j].stQuadRangle.u32Thick = 2;
                cover_s[j].stQuadRangle.stPoint[0].s32X= 0;
                cover_s[j].stQuadRangle.stPoint[0].s32Y= 0;
                cover_s[j].stQuadRangle.stPoint[1].s32X= 20;
                cover_s[j].stQuadRangle.stPoint[1].s32Y= 0;
                cover_s[j].stQuadRangle.stPoint[2].s32X= 20;
                cover_s[j].stQuadRangle.stPoint[2].s32Y= 10;
                cover_s[j].stQuadRangle.stPoint[3].s32X= 0;
                cover_s[j].stQuadRangle.stPoint[3].s32Y= 10;               
        }

        cover_s[1].stQuadRangle.stPoint[0].s32X= 0;
        cover_s[1].stQuadRangle.stPoint[0].s32Y= 60;
        cover_s[1].stQuadRangle.stPoint[1].s32X= 20;
        cover_s[1].stQuadRangle.stPoint[1].s32Y= 60;
        cover_s[1].stQuadRangle.stPoint[2].s32X= 20;
        cover_s[1].stQuadRangle.stPoint[2].s32Y= 80;
        cover_s[1].stQuadRangle.stPoint[3].s32X= 0;
        cover_s[1].stQuadRangle.stPoint[3].s32Y= 80;
        cover_s[0].u32Color = 0xFFFF00;
        cover_s[1].u32Color = 0xFFFF00;
        //HI_MPI_VGS_AddCoverTaskArray(hHandle,&stTask,cover_s,2);
        s32Ret = HI_MPI_VGS_AddCoverTask(hHandle,&stTask,&cover_s[0]);
        printf("HI_MPI_VGS_AddCoverTask ret=%#x\n",s32Ret);

打印的返回值是0