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link usecase do not work fine after dei link is added?

Hi,

   Now I am geting in trouble with the McFw framework.  I use link below,but I can not see anything in the SD display screen.

 

PS: it work fine without the dei link.

Then I add the dei link becase frames can be converted from interlace to the progressive format,

which is better to process using Vlib or OpenCV and so on.

But after I add the dei link to the usecase, It do not work fine.

 anyone tell why? The wrong link is below.