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YUV 422 to serial RGB conversion

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Hi I want to read YUV422 image from frame buffer and want to display out serial RGB 8 bit at the output

I changed the output format SRGB quadraple speed format, at the output ;

when I give one color in the frame buffer I see the correct image at the out,

But when I read two different YUV422 format color I see four different color at the out

for ex: 

input frame : red,red,red,red.... out: red,red,red,

input frame :red,blue,red,blue... out: red,another color1, blue, another color2,red...

 

any idea?


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