我正在尝试使用mono加载一些本地linux库。我已经用调试标志运行了单声道:
Mono: DllImport attempting to load: 'libavformat.57'.
Mono: DllImport error loading library '/home/filoe/Desktop/cscore/cscore/Samples/LinuxSample/bin/Debug/libavformat.57': '/home/filoe/Desktop/cscore/cscore/Samples/LinuxSample/bin/Debug/libavformat.57: cannot open shared object file: No such file or directory'.
Mono: DllImport error loading library '/home/filoe/Desktop/cscore/cscore/Samples/LinuxSample/bin/Debug/libavformat.57.so': 'libavcodec.so.57: cannot open shared object file: No such file or directory'.
Mono: DllImport error loading library '/usr/lib/libavformat.57': '/usr/lib/libavformat.57: cannot open shared object file: No such file or directory'.
Mono: DllImport error loading library '/usr/lib/libavformat.57.so': '/usr/lib/libavformat.57.so: cannot open shared object file: No such file or directory'.
Mono: DllImport error loading library 'libavformat.57': 'libavformat.57: cannot open shared object file: No such file or directory'.
Mono: DllImport error loading library 'libavformat.57.so': 'libavformat.57.so: cannot open shared object file: No such file or directory'.
Mono: DllImport error loading library 'libavformat.57': 'libavformat.57: cannot open shared object file: No such file or directory'.
Mono: DllImport unable to load library 'libavformat.57: cannot open shared object file: No such file or directory'.
Mono: DllImport attempting to load: 'libavformat.57'.
查找位置很多,但至少应匹配其中一个。这是我的目录的样子:
filoe@ubuntu:~/Desktop/cscore/cscore/Samples/LinuxSample/bin/Debug$ dir
CSCore.Ffmpeg.dll CSCore.Ffmpeg.dll.mdb CSCore.Linux.dll.config FFmpeg libavformat.57 libswresample.2 LinuxSample.exe.mdb
CSCore.Ffmpeg.dll.config CSCore.Linux.dll CSCore.Linux.dll.mdb libavcodec.57 libavutil.55 LinuxSample.exe log.txt
filoe@ubuntu:~/Desktop/cscore/cscore/Samples/LinuxSample/bin/Debug$
如您所见,在libavformat.57
那里。难道单声道告诉我找不到它吗?
以下代码演示了完成的操作:
声明一些DllImport
方法:
[DllImport("avformat-57", EntryPoint = "av_register_all", CallingConvention = CallingConvention.Cdecl, CharSet = CharSet.Ansi)]
internal static extern void av_register_all();
[DllImport("avcodec-57", EntryPoint = "avcodec_register_all", CallingConvention = CallingConvention.Cdecl, CharSet = CharSet.Ansi)]
internal static extern void avcodec_register_all();
该项目还包含一个名为“ {输出程序集的名称} .config”的文件:
<configuration>
<dllmap os="linux" dll="avcodec-57" target="libavcodec.57"/>
<dllmap os="linux" dll="avformat-57" target="libavformat.57"/>
</configuration>
正如您在上面看到的,映射工作正常。Mono使用“ avformat-57”并将其转换为“ libavformat.57”。现在,单声道搜索名称为“ libavformat.57”或一些相关名称(如“ libavformat.57.so”)的库。Mono在执行程序集的目录中搜索。
但是,它无法找到要查找的文件(根据上面发布的日志)。所以为什么?
谢谢!
问候
关键是要使用命令
ldd libavformat.57
具有以下输出:
linux-vdso.so.1 => (0x00007ffdf9bd6000)
libavcodec.so.57 => not found
libavutil.so.55 => not found
libm.so.6 => /lib/x86_64-linux-gnu/libm.so.6 (0x00007f4a74652000)
libz.so.1 => /lib/x86_64-linux-gnu/libz.so.1 (0x00007f4a74439000)
libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007f4a7421b000)
libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007f4a73e56000)
/lib64/ld-linux-x86-64.so.2 (0x00007f4a74d73000)
因此,我已将其重命名为建议的名称,然后再次尝试未成功。下次尝试
LD_LIBRARY_PATH=./ ldd libavformat.so.57
那是成功的。我已经调整了配置文件,现在我可以使用
LD_LIBRARY_PATH=./ mono MyApp.exe
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