1、代码拉取 https://www.cnblogs.com/132818Creator/p/12516850.html
2、执行命令 gn gen out/h264 --ide=vs2019 --args="proprietary_codecs=true rtc_use_h264=true ffmpeg_branding="Chrome" is_debug=true target_cpu="x64" rtc_include_tests=false"
3、 ninja -C out/h264
something from https://segmentfault.com/a/1190000021359782