月度归档：2021年03月

CentOS6.9升级autoconf版本 Autoconf version 2.64 or higher is required

CentOS6.9安装软件时提示说需要Autoconf 2.64或更高的版本

[root@BobServerStation twemproxy]# autoconf

configure.ac:8: error: Autoconf version 2.64 or higher is required

configure.ac:8: the top level

autom4te: /usr/bin/m4 failed with exit status: 63查询当前版本

[root@BobServerStation twemproxy]# rpm -qf /usr/bin/autoconf

autoconf-2.63-5.1.el6.noarch卸载当前版本

[root@BobServerStation twemproxy]# rpm -e –nodeps autoconf-2.63安装最新版本

[root@BobServerStation twemproxy]# wget ftp://ftp.gnu.org/gnu/autoconf/autoconf-2.68.tar.gz[root@BobServerStation twemproxy]# tar zxvf autoconf-2.68.tar.gz[root@BobServerStation twemproxy]# cd autoconf-2.68[root@BobServerStation twemproxy]# ./configure –prefix=/usr/[root@BobServerStation twemproxy]# make && make install 查看当前版本

[root@BobServerStation autoconf-2.68]# /usr/bin/autoconf -V

autoconf (GNU Autoconf) 2.68

Copyright (C) 2010 Free Software Foundation, Inc.

License GPLv3+/Autoconf: GNU GPL version 3 or later

<http://gnu.org/licenses/gpl.html>, <http://gnu.org/licenses/exceptions.html>

This is free software: you are free to change and redistribute it.

There is NO WARRANTY, to the extent permitted by law. 至此，autoconf已升级到2.68。

ffmpeg .avi 或 .MKV 转换to .MP3

ffmpeg -i "Sample.avi" -vn -ar 44100 -ac 2 -ab 128k -f mp3 "Sample.mp3"
目录查找批量修改方法：
The following command will find all mkv files that are in the current directory and in all sub-folders and extract the audio to mp3 format.

find . -type f -name "*.mkv" -exec bash -c 'FILE="$1"; ffmpeg -i "${FILE}" -vn -c:a libmp3lame -y "${FILE%.mkv}.mp3";' _ '{}' \;
The filename of the audio file will be the same as the mkv video with the correct extension. The mkv extension will be removed and replaced by the mp3 extension e.g hi.mkv will create a new file named hi.mp3