rgba yuv420p
参考
https://www.jianshu.com/p/819c23563c90
https://www.cnblogs.com/linuxAndMcu/p/12127975.html
https://blog.csdn.net/xiaibiancheng/article/details/73065646
https://blog.csdn.net/byhook/article/details/84475525
https://blog.csdn.net/MACMACip/article/details/105450185
https://www.cnblogs.com/linuxAndMcu/p/12119915.html#:~:text=SwsContext%20%E7%BB%93%E6%9E%84%E4%BD%93%20SwsContext%20%E6%98%AF%E8%BD%AC%E6%8D%A2%E6%A0%BC%E5%BC%8F%E7%9A%84%E4%B8%8A%E4%B8%8B%E6%96%87%E7%BB%93%E6%9E%84%E4%BD%93%EF%BC%8C%E4%B9%9F%E6%98%AF%E4%BD%BF%E7%94%A8,libswscale%20%E7%9A%84%E6%97%B6%E5%80%99%E4%B8%80%E4%B8%AA%E8%B4%AF%E7%A9%BF%E5%A7%8B%E7%BB%88%E7%9A%84%E7%BB%93%E6%9E%84%E4%BD%93%EF%BC%8C%E8%BF%99%E4%B8%AA%E7%BB%93%E6%9E%84%E4%BD%93%E7%9A%84%E5%AE%9A%E4%B9%89%E5%BE%88%E5%A4%8D%E6%9D%82%EF%BC%8C%E9%87%8C%E9%9D%A2%E5%8C%85%E5%90%AB%E4%BA%86%20libswscale%20%E6%89%80%E9%9C%80%E8%A6%81%E7%9A%84%E5%85%A8%E9%83%A8%E5%8F%98%E9%87%8F%E3%80%82
https://blog.csdn.net/leixiaohua1020/article/details/12029505
https://blog.csdn.net/tea1896/article/details/72453510
https://blog.csdn.net/leixiaohua1020/article/details/42134965
https://blog.csdn.net/leixiaohua1020/article/details/44305697
https://blog.csdn.net/leixiaohua1020/article/details/44305697
https://www.jianshu.com/p/a3dc034deca6
https://blog.csdn.net/u010029439/article/details/80788479
https://www.jianshu.com/p/6c4155988c7d
https://www.jianshu.com/p/944ede616261
https://www.shangmayuan.com/a/c099c271a2904c3c932d654f.html
https://www.codenong.com/js6c4155988c7d/
https://blog.csdn.net/xiaibiancheng/article/details/73065646
https://blog.csdn.net/alspd_zhangpan/article/details/108243789
https://www.jianshu.com/p/bd0feaf4c0f9
https://blog.csdn.net/fengbingchun/article/details/50323273
https://www.jianshu.com/p/e52a3a19c8fe
https://blog.csdn.net/fengchu3415/article/details/84871710
https://blog.csdn.net/xiaolong1126626497/article/details/105984222
https://github.com/lemenkov/libyuv/blob/master/docs/getting_started.md
https://www.thinbug.com/q/54037393
https://www.cnblogs.com/cyyljw/p/8676062.html
https://www.cnblogs.com/yongdaimi/p/9829290.html
https://rumenz.com/rumenbiji/ffmpeg-sws_getCachedContext.html
https://www.cnblogs.com/yongdaimi/p/10715830.html#:~:text=%E4%B8%8E%E5%85%B6%E7%B1%BB%E4%BC%BC%E7%9A%84%E5%87%BD%E6%95%B0%E8%BF%98%E6%9C%89%EF%BC%9A%20sws_getCachedContext%20%EF%BC%8C%E5%8C%BA%E5%88%AB%E5%9C%A8%E4%BA%8E%EF%BC%9A%20sws_getContext,%E5%8F%AF%E4%BB%A5%E7%94%A8%E4%BA%8E%E5%A4%9A%E8%B7%AF%E7%A0%81%E6%B5%81%E8%BD%AC%E6%8D%A2%EF%BC%8C%E4%B8%BA%E6%AF%8F%E4%B8%AA%E4%B8%8D%E5%90%8C%E7%9A%84%E7%A0%81%E6%B5%81%E9%83%BD%E6%8C%87%E5%AE%9A%E4%B8%80%E4%B8%AA%E4%B8%8D%E5%90%8C%E7%9A%84%E8%BD%AC%E6%8D%A2%E4%B8%8A%E4%B8%8B%E6%96%87%EF%BC%8C%E8%80%8C%20sws_getCachedContext%20%E5%8F%AA%E8%83%BD%E7%94%A8%E4%BA%8E%E4%B8%80%E8%B7%AF%E7%A0%81%E6%B5%81%E8%BD%AC%E6%8D%A2%E3%80%82%202.sws_freeContext
https://blog.csdn.net/u010029439/article/details/82859206
https://www.cnblogs.com/yfceshi/p/7092525.html