ffmpeg推流时报错 Unknown encoder 'libx264'

本是古典何须时尚 2023-06-14 11:55 6阅读 0赞

## 问题 ##

执行以下ffmpeg推流命令时报错

ffmpeg -re -i "/home/lee000/Videos/00001.mp4" -vcodec libx264 -vprofile baseline -acodec aac -ar 44100 -strict -2 -ac 1 -f flv -s 1280x720 -q 10 rtmp://192.168.100.158:1935/rtmplive/test1

[root@localhost Videos]# ffmpeg -re -i "/home/lee000/Videos/00001.mp4" -vcodec libx264 -vprofile baseline -acodec aac -ar 44100 -strict -2 -ac 1 -f flv -s 1280x720 -q 10 rtmp://192.168.100.158:1935/rtmplive/test1
    ffmpeg version N-95767-gcda3e8c Copyright (c) 2000-2019 the FFmpeg developers
      built with gcc 4.8.5 (GCC) 20150623 (Red Hat 4.8.5-39)
      configuration: --prefix=/usr/softinstall/ffmpeg
      libavutil      56. 36.100 / 56. 36.100
      libavcodec     58. 62.100 / 58. 62.100
      libavformat    58. 35.100 / 58. 35.100
      libavdevice    58.  9.100 / 58.  9.100
      libavfilter     7. 66.100 /  7. 66.100
      libswscale      5.  6.100 /  5.  6.100
      libswresample   3.  6.100 /  3.  6.100
    Guessed Channel Layout for Input Stream #0.1 : mono
    Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/home/lee000/Videos/00001.mp4':
      Metadata:
        major_brand     : mp42
        minor_version   : 0
        compatible_brands: mp42isom
        creation_time   : 2019-10-16T06:58:33.000000Z
      Duration: 00:11:12.83, start: 0.000000, bitrate: 1251 kb/s
        Stream #0:0(und): Video: h264 (Baseline) (avc1 / 0x31637661), yuv420p, 1280x720, 791 kb/s, 29.82 fps, 29.92 tbr, 90k tbn, 180k tbc (default)
        Stream #0:1(und): Audio: pcm_mulaw (ulaw / 0x77616C75), 8000 Hz, mono, s16, 64 kb/s (default)
    Unknown encoder 'libx264'

## 解决方案 ##

这是在安装ffmpeg时没有安装`libx264`库导致

#### 安装libx264 ####

1）下载libx264[（官网）][Link 1]

git clone https://code.videolan.org/videolan/x264.git

2）切到x264根目录

cd x264

3）生成 Makefile

./configure --prefix=/usr/softinstall/x264/ --includedir=/usr/local/include --libdir=/usr/local/lib --enable-shared

>   如果不将include和lib安装在/usr/local目录，之后运行ffmpeg推流命令时可能仍然报`ERROR:libx264 not found`错误。如果已经安装x264了发现报错，则需要将x264.h这个文件要放在`/usr/local/include`下，libx264的库文件拷贝到`/usr/local/lib`下，而不是指定其它目录安装存放。推荐安装时直接运行以上命令。

> **可能报如下错误：**  
> \[root@localhost x264\]\# ./configure --prefix=/usr/softinstall/x264/ --enable-static --enable-shared  
> Unknown option --enable-share, ignored Found no assembler Minimum > version is nasm-2.13  
> If you really want to compile without asm, configure with --disable-asm.  
> **解决方案：**  
> 下载更新安装nasm新版本[（nasm官网）][nasm]：  
> `wget https://www.nasm.us/pub/nasm/releasebuilds/2.14/nasm-2.14.tar.gz`

4）编译

make

5）安装

sudo make install

#### 重新编译安装ffmpeg（已安装先卸载） ####

1）生成 Makefile时，加上x264

./configure --prefix=/usr/softinstall/ffmpeg --enable-gpl --enable-shared --enable-libx264

2）清理

make clean

2）编译

make

3）安装

sudo make install

4）配置环境变量（参考：[安装linux下tar.gz包][linux_tar.gz]）

vim /etc/profile

export FFMPEG_PATH=/usr/softinstall/ffmpeg
    export CLASSPATH=$FFMPEG_PATH/lib:$CLASSPATH
    PATH=$FFMPEG_PATH/bin:$PATH

source /etc/profile

5）测试

ffmpeg -version

![在这里插入图片描述][20191118114822265.png]

#### 问题一： ####

重新执行以下ffmpeg推流命令时报错：

[root@localhost ffmpeg]# ffmpeg -re -i "/home/lee000/Videos/00001.mp4" -vcodec libx264 -vprofile baseline -acodec aac -ar 44100 -strict -2 -ac 1 -f flv -s 1280x720 -q 10 rtmp://server:1935/rtmplive/test1
    ffmpeg: error while loading shared libraries: libavdevice.so.58: cannot open shared object file: No such file or directory

#### 解决方案： ####

修改ld.so.conf文件

sudo vim /etc/ld.so.conf

配置文件追加`ffmpeg安装目录`下的lib文件夹（以下是我本机的）：

/usr/softinstall/ffmpeg/lib

使修改生效：

sudo ldconfig

#### 问题二： ####

重新执行以下ffmpeg推流命令时报错：

[root@localhost lib]# ffmpeg -re -i "/home/lee000/Videos/00001.mp4" -vcodec libx264 -vprofile baseline -acodec aac -ar 44100 -strict -2 -ac 1 -f flv -s 1280x720 -q 10 rtmp://server:1935/rtmplive/test1
    ffmpeg: error while loading shared libraries: libx264.so.158: cannot open shared object file: No such file or directory

#### 解决方案（同问题一）： ####

修改ld.so.conf文件

sudo vim /etc/ld.so.conf

配置文件追加`x264安装目录`下的lib文件夹（以下是我本机的）：

/usr/local/lib

使修改生效：

sudo ldconfig

#### 问题三： ####

[root@localhost lib]# ffmpeg -re -i "/home/lee000/Videos/00001.mp4" -vcodec libx264 -vprofile baseline -acodec aac -ar 44100 -strict -2 -ac 1 -f flv -s 1280x720 -q 10 rtmp://192.168.100.158:1935/rtmplive/test1
    ffmpeg version N-95767-gcda3e8c Copyright (c) 2000-2019 the FFmpeg developers
      built with gcc 4.8.5 (GCC) 20150623 (Red Hat 4.8.5-39)
      configuration: --prefix=/usr/softinstall/ffmpeg --enable-gpl --enable-shared --enable-libx264
      libavutil      56. 36.100 / 56. 36.100
      libavcodec     58. 62.100 / 58. 62.100
      libavformat    58. 35.100 / 58. 35.100
      libavdevice    58.  9.100 / 58.  9.100
      libavfilter     7. 66.100 /  7. 66.100
      libswscale      5.  6.100 /  5.  6.100
      libswresample   3.  6.100 /  3.  6.100
      libpostproc    55.  6.100 / 55.  6.100
    Guessed Channel Layout for Input Stream #0.1 : mono
    Input #0, mov,mp4,m4a,3gp,3g2,mj2, from '/home/lee000/Videos/00001.mp4':
      Metadata:
        major_brand     : mp42
        minor_version   : 0
        compatible_brands: mp42isom
        creation_time   : 2019-10-16T06:58:33.000000Z
      Duration: 00:11:12.83, start: 0.000000, bitrate: 1251 kb/s
        Stream #0:0(und): Video: h264 (Baseline) (avc1 / 0x31637661), yuv420p, 1280x720, 791 kb/s, 29.82 fps, 29.92 tbr, 90k tbn, 180k tbc (default)
        Stream #0:1(und): Audio: pcm_mulaw (ulaw / 0x77616C75), 8000 Hz, mono, s16, 64 kb/s (default)
    [tcp @ 0x1377ec0] Connection to tcp://192.168.100.158:1935 failed: Connection refused
    [rtmp @ 0x1409b40] Cannot open connection tcp://192.168.100.158:1935
    rtmp://192.168.100.158:1935/rtmplive/test1: Connection refused

#### 解决方案： ####

配置nginx时，只修改了nginx.conf，但未修改nginx.conf.default默认配置文件，把`nginx.conf.default`修改和`nginx.conf`内容一致即可  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3l1eGllbGVh_size_16_color_FFFFFF_t_70]

[Link 1]: https://www.videolan.org/developers/x264.html
[nasm]: https://www.nasm.us/
[linux_tar.gz]: https://blog.csdn.net/yuxielea/article/details/103104711
[20191118114822265.png]: https://img-blog.csdnimg.cn/20191118114822265.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3l1eGllbGVh_size_16_color_FFFFFF_t_70]: https://img-blog.csdnimg.cn/2019112016034478.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3l1eGllbGVh,size_16,color_FFFFFF,t_70