我用 pacman 安装了 opencv,当我尝试导入 opencv 时,出现以下错误:
>>> import cv2
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ImportError: libavcodec.so.56: cannot open shared object file: No such file or directory
我该如何修复这个错误?
编辑
sudo pacman -Ss libav
extra/gst-libav 1.4.4-1 [installed: 1.4.1-1]
Gstreamer libav Plugin
extra/libavc1394 0.5.4-2 [installed]
A library to control A/V devices using the 1394ta AV/C commands.
community/ffms2 2.20-2 [installed]
A libav/ffmpeg based source library and Avisynth plugin for easy frame
accurate access
答案1
这意味着您没有安装正确的库。尝试使用 进行搜索pacman -Ss libav
。
在 OpenSuSE 上,这部分libavcodec52
内容表示它与ffmpeg
.检查是否安装了ffmpeg
at以及依赖项应该拉入 libavcodec。
编辑
读完拱门后文档,看起来确实ffmpeg
提供了libavcodec
要求。
答案2
检查 ffmpeg 软件包是否安装和版本时,centOS 上也遇到同样的问题:
#/usr/local/bin/ffmpeg
/usr/local/bin/ffmpeg: error while loading shared libraries: libavdevice.so.56: cannot open shared object file: No such file or directory
或者
# ldd `which ffmpeg`
linux-vdso.so.1 => (0x00007fffb32d8000)
libavdevice.so.56 => not found
libavfilter.so.5 => not found
libavformat.so.56 => not found
libavcodec.so.56 => not found
libpostproc.so.53 => not found
libswresample.so.1 => not found
libswscale.so.3 => not found
libavutil.so.54 => not found
libpthread.so.0 => /lib64/libpthread.so.0 (0x00007f75f2ef8000)
libm.so.6 => /lib64/libm.so.6 (0x00007f75f2c74000)
libc.so.6 => /lib64/libc.so.6 (0x00007f75f28df000)
/lib64/ld-linux-x86-64.so.2 (0x00007f75f3126000)
解决方案:
现在,检查库路径,打开ld.so.conf
# vim /etc/ld.so.conf
include ld.so.conf.d/*.conf
/usr/local/lib
/usr/lib
最后保存退出:wq!
现在,使用相同的命令检查,
# ffmpeg -v
ffmpeg version N-73873-gcee7acf-syslin Copyright (c) 2000-2015 the FFmpeg developers
built with gcc 4.4.7 (GCC) 20120313 (Red Hat 4.4.7-11)
configuration: --enable-shared --enable-nonfree --enable-gpl --enable-pthreads --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libfaac --enable-libmp3lame --enable-libtheora --enable-libvorbis --extra-libs=-lx264 --enable-libxvid --extra-cflags=-I/usr/local/cpffmpeg/include/ --extra-ldflags=-L/usr/local/cpffmpeg/lib --enable-version3 --extra-version=syslin --enable-libass --enable-libvpx --enable-zlib --enable-gpl
libavutil 54. 28.100 / 54. 28.100
libavcodec 56. 50.101 / 56. 50.101
libavformat 56. 40.101 / 56. 40.101
libavdevice 56. 4.100 / 56. 4.100
libavfilter 5. 25.100 / 5. 25.100
libswscale 3. 1.101 / 3. 1.101
libswresample 1. 2.101 / 1. 2.101
libpostproc 53. 3.100 / 53. 3.100