Project scenario ：

Project scenario ： When we deal with video data decoding , We often encounter decoding failure and green screen , At this time, we usually check the program code at the decoding end .

Problem description

When something goes wrong , Have you considered the following questions ：

“ Why the green screen , Not a yellow curtain 、 Blue screen or other colors ？”

Cause analysis ：

1. After decoding the video data , yes YUV Format , That is, by Y\U\V Component composition ;
2. If the final picture shows , It is necessary to YUV Format to RGB,RGB It's three primary colors red、green、blue For short ;
3. When we decode , Will usually YUV The data of the video picture is initialized to 0;
4. When decoding fails , according to YUV And RGB The conversion formula of , In the end by the Y(0)\U(0)\V(0) Convert to get us RGB Corresponding value , This value is the corresponding “ Green curtain ” The color of the ;

So here's a summary ：

 Interested students can pay attention to YUV And RGB Format , And the mutual conversion formula .