problem with vedio process using VIP

hi everyone ,

i am using SOPC IP to process image ,my project flow is

PAL image--->ADV7189(YCbCr)--->Clocked video input--->clocked video output--->ADV7123(RGB),now i have not been make image display successfully.the display screen is all black.following is my problem:

1.can the clocked video input connect the clocked video output directly?

2.how can i connect the clocked video output signal(vid_data_from_the alt_vip_itc_0,vid_datavalid_from_the alt_vip_itc_0,vid_trs_from_the alt_vip_itc_0 and so on ) with ADV7123 signal(DAC_DATA[9:0],CYSNC,CBLANK,CCLK)?

if anyone can help me ,thank you!