ERROR: x264 not found using pkg-config

ERROR: x264 not found using pkg-config

If you think configure made a mistake, make sure you are using the latest
version from Git. If the latest version fails, report the problem to the
ffmpeg-user@ffmpeg.org mailing list or IRC #ffmpeg on irc.libera.chat.
Include the log file “ffbuild/config.log” produced by configure as this will help
solve the problem.

原因：

% which pkg-config
pkg-config not found

没有安装apk-config

解决方法：
Macos下，其他自行问豆包吧。

% brew install pkg-config

然后./configure就不报错了。