decoding qr codes using vuforia+unity+zxing

I am currently trying to decode QR codes using vuforia+unity +zxing.I have tried all the solutions given online but non worked as most of the three years old.I also tried to use Texture2D to obtain screenshot using ARCamera feed and then process it.Although this way worked,it made my app insanely slow.

Is there any effective way of decoding qr codes using zxing and vuforia?

Any help would be greatly appreciated.

Thank you

 

I got the similar question. Thinking if we could just decode the QR code by zxing then directly pass the video URL to vuforia during run time?