linux ffmpeg Unknown encoder h264

冷不防 2023-02-11 03:21 5阅读 0赞

linux执行命令：  
ffmpeg -y -i v\_test.avi -vcodec h264 -strict -2 v\_test.mp4

报错：Unknown encoder ‘h264’

错误原因：当前ffmpeg没有h264视频编码器

解决方案：  
1.安装x264

git clone git://git.videolan.org/x264.git
    cd x264
    #查看帮助信息
    ./configure --help
    #我们需要的是x264以.so or .a的形式来支援ffmpeg，所以一般就关注shared和static关键词就可以了
    ./configure --enable-shared --enable-static
    make
    make install

2.重新编译ffmpeg  
下载最新版本ffmpeg-4.1.tar.bz2  
http://ffmpeg.org/download.html

tar xjf ffmpeg-4.1.tar.bz2
    cd ffmpeg-4.1
    ./configure --prefix=/usr/local/ffmpeg --enable-shared --enable-yasm --enable-libx264 --enable-gpl --enable-pthreads --extra-cflags=-I/usr/local/x264/include --extra-ldflags=-L/usr/local/x264/lib 
    #报错，根据提示加上--disable-x86asm
    ./configure --prefix=/usr/local/ffmpeg --enable-shared --enable-yasm --enable-libx264 --enable-gpl --enable-pthreads --extra-cflags=-I/usr/local/x264/include --extra-ldflags=-L/usr/local/x264/lib --disable-x86asm
    make
    make install

错误信息：

error while loading shared libraries: libavdevice.so.58: cannot open  
shared object file: No such file or directory  
error while loading shared libraries: libx264.so.157: cannot open  
shared object file: No such file or directory

find / -name libavdevice.so.58
    #find / -name libx264.so.157
    vim /etc/ld.so.conf 
    #将上述目录添加到最后一行并保存退出；
    /sbin/ldconfig

[https://blog.csdn.net/weixin\_33127753/article/details/84637351][https_blog.csdn.net_weixin_33127753_article_details_84637351]

[https_blog.csdn.net_weixin_33127753_article_details_84637351]: https://blog.csdn.net/weixin_33127753/article/details/84637351