cd ffmpeg-4.1 make uninstall ##删除由make install命令安装的文件 make clean ##只删除make时产生的临时文件 make distclean ##同时删除configure和make产生的临时文件
问题解决
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baiduiov@FreweniUbuntuBaidu:~/tools/ffmpeg-3.4.11$ ./configure --enable-shared --prefix=/usr/local/ffmpeg nasm/yasm not found or too old. Use --disable-x86asm for a crippled build.
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.