--enable-debug=3 --disable-doc --disable-optimizations --enable-pic --extra-cflags=-fPIC --enable-openssl --enable-libx264 --enable-libx265 --enable-gpl --enable-nonfree --enable-libfreetype
配置ffmpeg –enable-libfreetype 选项。
使用如下命令进行转码：
ffmpeg -i inputfile -vf "drawtext=fontfile=/usr/share/fonts/truetype/wqy/wqy-microhei.ttc: x=40: y=40: fontcolor=white: fontsize=100: box=1:boxborderw=20: boxcolor=0x00000000@1: text=%{n}" -vcodec libx264 -r 15 ./outputfilename.mkv