【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:

#elif defined(__unix__) || defined(__APPLE__) || defined(__MACOSX)

#include <dlfcn.h>

static char __DriverLibName[] = "libnvcuvid.so";

typedef void *DLLDRIVER;

static CUresult LOAD_LIBRARY(DLLDRIVER *pInstance)
{
    *pInstance = dlopen(__DriverLibName, RTLD_NOW);

    if (*pInstance == NULL)
    {
        printf("dlopen "%s" failed!
", __DriverLibName);
        return CUDA_ERROR_UNKNOWN;
    }

    return CUDA_SUCCESS;
}

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