1：YUV420 (1):I420: YYYYYYYY UU VV =>YUV420P (2):YV12 YYYYYYYY VV UU =>YUV420P (3):NV12 YYYYYYYY UVUV =>YUV420SP (dxva 输出 NV12) (4):NV21 YYYYYYYY VUVU =>YUV420SP (x264/ffmpeg 输入、输出 I420）
详细说明：
https://blog.csdn.net/xjhhjx/article/details/80291465
格式转换：
https://www.jianshu.com/p/a91502c00fb0
其他：
https://msd.misuland.com/pd/3047868153708151810?page=1
