依赖
gcc
ffmpeg

yum install gcc
验证是否安装：gcc -v

wget https://ffmpeg.org/releases/ffmpeg-4.1.3.tar.bz
tar jxvf ffmpeg-4.1.3.tar.bz2
cd ffmpeg-4.1.3
./configure
make
make install
验证是否安装成功：ffmpeg -version
ffmpeg version 4.1.3 Copyright (c) 2000-2019 the FFmpeg developers
built with gcc 4.4.7 (GCC) 20120313 (Red Hat 4.4.7-23)
configuration: 
libavutil      56. 22.100 / 56. 22.100
libavcodec     58. 35.100 / 58. 35.100
libavformat    58. 20.100 / 58. 20.100
libavdevice    58.  5.100 / 58.  5.100
libavfilter     7. 40.101 /  7. 40.101
libswscale      5.  3.100 /  5.  3.100
libswresample   3.  3.100 /  3.  3.100

当执行./configure报错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.freenode.net.
Include the log file "ffbuild/config.log" produced by configure as this will help
solve the problem.
1）下载：wget http://www.tortall.net/projects/yasm/releases/yasm-1.3.0.tar.gz

2）解压：tar zxvf yasm-1.3.0.tar.gz

3）切换路径： cd yasm-1.3.0

4）执行配置： ./configure

5）编译：make

6）安装：make install

git clone https://github.com/kn007/silk-v3-decoder.git silk-v3-decoder 

输入：sh converter.sh 33921FF3774A773BB193B6FD4AD7C33E.slk mp3
注意：其中33921FF3774A773BB193B6FD4AD7C33E.slk是要转换的文件，而mp3是最终转换后输出的格式。
github地址：https://github.com/kn007/silk-v3-decoder