# New capture card YUV 4:2:2 leads to different images

I have just bought a new video capture card whose output format is YUV 4:2:2 (as my old one) and surprisingly when I capture images with both cards I get different results. Differences are very small (have to zoom on edges if you want to see something) but I would like to know where do they come from? I was wondering if it was the transformation:

YUV 422 -> YUV 444


That could change from one driver to another?

Here is the original image:

Here is the capture with my old card:

Here is the capture with my new card:

• What is the input format to each capture card? Analog RGB, or ??? – hotpaw2 Apr 15 '14 at 23:42