ffmpeg 编译错误 “ERROR: freetype2 not found using pkg-config”

编译 ffmpeg 出现 “ERROR: freetype2 not found using pkg-config” 错误。分析是因为缺少 freetype 库造成的。

 

错误信息：

ERROR: freetype2 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.freenode.net.
Include the log file "ffbuild/config.log" produced by configure as this will help
solve the problem.

修改方法：

sudo apt install libfreetype6-dev