【小记录】利用cuvid库做视频解码，运行出现"dlopen "libnvcuvid.so" failed!"

1.查看源码：
/Video_Codec_SDK_8.0.14/Samples/common/src/dynlink_nvcuvid.cpp
 其中的LOAD_LIBRARY函数的源码如下:

 1 #elif defined(__unix__) || defined(__APPLE__) || defined(__MACOSX)
 2 
 3 #include <dlfcn.h>
 4 
 5 static char __DriverLibName[] = "libnvcuvid.so";
 6 
 7 typedef void *DLLDRIVER;
 8 
 9 static CUresult LOAD_LIBRARY(DLLDRIVER *pInstance)
10 {
11     *pInstance = dlopen(__DriverLibName, RTLD_NOW);
12 
13     if (*pInstance == NULL)
14     {
15         printf("dlopen \"%s\" failed!\n", __DriverLibName);
16         return CUDA_ERROR_UNKNOWN;
17     }
18 
19     return CUDA_SUCCESS;
20 }

看来是写死了so的名字

2. 

cd /usr/local/nvidia/lib64

ls -l libnvcuvid*

lrwxrwxrwx 1 995 991 20 May 9 2018 libnvcuvid.so.1 -> libnvcuvid.so.384.81
-rwxr-xr-x 1 root root 2403472 May 8 2018 libnvcuvid.so.384.81

没有这个名字的so

3. 解决
/usr/local/nvidia/lib64
sudo -s
ln -s libnvcuvid.so.384.81 libnvcuvid.so