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FFmpeg编译
- 下载代码:git clone https://git.ffmpeg.org/ffmpeg.git
- 然后输入命令进行编译:找到下载的目录下,然后用命令进入这个文件夹下cd ffmpeg,然后输入./configure。
- 竟然没有编译过出现错误是
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
[email protected] 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.
分析:yasm是汇编编译器,ffmpeg为了提高效率使用了汇编指令,如MMX和SSE等。所以系统中未安装yasm时,就会报上面错误。
解决错误:安装yasm编译器。安装方法如下:
1)下载:[yasm的下载链接](http://www.tortall.net/projects/yasm/releases/yasm-1.3.0.tar.gz)
2)解压:把下载下来的压缩包进行解压
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(提示:Permission denied,就执行sudo make install)
- 安装成功yasm你可以在进入到ffmpeg的文件夹下,进行./configure
- make
- make install(提示:Permission denied,就执行sudo make install)
- 然后打出ffmpeg
ffmpeg version 4.1 Copyright (c) 2000-2018 the FFmpeg developers
built with Apple LLVM version 7.0.2 (clang-700.1.81)
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
Hyper fast Audio and Video encoder
usage: ffmpeg [options] [[infile options] -i infile]... {[outfile options] outfile}...
Use -h to get full help or, even better, run 'man ffmpeg'
这样ffmpeg就安装成功了。
ffplay: command not found
如果你要用到ffplay的时候,发现没有这个命令的时候,是因为ffplay和ffmpeg不是在一起的,需要单独下载。ffplay下载地址 http://evermeet.cx/ffmpeg/ 。把下载下来的文件双击打开运行,如果提示Permission denied,到系统偏好设置,打开安全与隐私,允许ffplay运行就可以了。运行完之后,再在.bash_profile文件配置ffplay path就可以了(这个路径就是ffplay文件的位置)。