使用 C++ 和 CUDA 在 GPU 上读取视频答案

【问题标题】：Reading a video on GPU using C++ and CUDA使用 C++ 和 CUDA 在 GPU 上读取视频
【发布时间】：2023-04-03 16:32:01
【问题描述】：

大家好，感谢您的回答

首先，正如 @zkoza 和 @talonmies 指出的那样，Jetson AGX Xavier 与 ARCH 7.2 兼容，而不是与 Jetson Nano 中使用的 ARCH 5.3 兼容案例。

致 @Yunus Temurlenk => 我的代码中的 fname 只是 myvideo.MOV，因为我在电影的同一目录中执行我的代码，我还尝试使用从示例中获取的 .mp4 文件在互联网上导致同样的错误。是的，正如您指出的那样，在 cmake 命令之后我的 NVCUVID 没有打开，正如您在我的原始帖子中看到的那样，对应于 CUDA 的行是

 NVIDIA CUDA: YES (ver 10.2, CUFFT CUBLAS FAST_MATH)

而不是

 NVIDIA CUDA: YES (ver 10.2, CUFFT NVCUVID CUBLAS FAST_MATH)

我不知道缺少哪些依赖项，但我在这里也看到 NVCUVID 已被弃用：https://docs.nvidia.com/cuda/video-decoder/index.html

cuda 步骤 6 中的示例运行良好 :) 我目前正在使用 cuda 10.2 制作 opencv 4.3.0 如果这解决了我的问题，我将更新我的答案。

编辑：不幸的是，在 Ubuntu 18.04 上使用 openCV 4.3.0 和 Cuda 10.2 时问题完全相同，但我想补充一点，我使用此命令进行编译：

g++ video_reader.cpp -o vr.exe `pkg-config --cflags --libs opencv4`

因为 g++ 本身给了我这个错误：

video_reader.cpp:3:10: fatal error: opencv2/opencv_modules.hpp: No such file or directory
 #include "opencv2/opencv_modules.hpp"
          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
compilation terminated.

那么，也许我的编译命令有问题？

结束编辑

致 @user2986898 和 @einpoklum => 我运行了 cv::getBuildInformation() 和其他 2 个函数：设备数量和兼容设备数量.设备和兼容设备的数量如预期为 1，构建信息为：

General configuration for OpenCV 4.5.1 =====================================
  Version control:               unknown

  Extra modules:
    Location (extra):            /home/dronemaitre/Documents/opencv_cpp/opencv_contrib/modules
    Version control (extra):     unknown

  Platform:
    Timestamp:                   2021-01-18T10:12:44Z
    Host:                        Linux 4.9.140-tegra aarch64
    CMake:                       3.10.2
    CMake generator:             Unix Makefiles
    CMake build tool:            /usr/bin/make
    Configuration:               RELEASE

  CPU/HW features:
    Baseline:                    NEON FP16

  C/C++:
    Built as dynamic libs?:      YES
    C++ standard:                11
    C++ Compiler:                /usr/bin/c++  (ver 7.5.0)
    C++ flags (Release):         -fsigned-char -ffast-math -W -Wall -Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wundef -Winit-self -Wpointer-arith -Wshadow -Wsign-promo -Wuninitialized -Wsuggest-override -Wno-delete-non-virtual-dtor -Wno-comment -Wimplicit-fallthrough=3 -Wno-strict-overflow -fdiagnostics-show-option -pthread -fomit-frame-pointer -ffunction-sections -fdata-sections    -fvisibility=hidden -fvisibility-inlines-hidden -O3 -DNDEBUG  -DNDEBUG
    C++ flags (Debug):           -fsigned-char -ffast-math -W -Wall -Werror=return-type -Werror=non-virtual-dtor -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wundef -Winit-self -Wpointer-arith -Wshadow -Wsign-promo -Wuninitialized -Wsuggest-override -Wno-delete-non-virtual-dtor -Wno-comment -Wimplicit-fallthrough=3 -Wno-strict-overflow -fdiagnostics-show-option -pthread -fomit-frame-pointer -ffunction-sections -fdata-sections    -fvisibility=hidden -fvisibility-inlines-hidden -g  -O0 -DDEBUG -D_DEBUG
    C Compiler:                  /usr/bin/cc
    C flags (Release):           -fsigned-char -ffast-math -W -Wall -Werror=return-type -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wshadow -Wuninitialized -Wno-comment -Wimplicit-fallthrough=3 -Wno-strict-overflow -fdiagnostics-show-option -pthread -fomit-frame-pointer -ffunction-sections -fdata-sections    -fvisibility=hidden -O3 -DNDEBUG  -DNDEBUG
    C flags (Debug):             -fsigned-char -ffast-math -W -Wall -Werror=return-type -Werror=address -Werror=sequence-point -Wformat -Werror=format-security -Wmissing-declarations -Wmissing-prototypes -Wstrict-prototypes -Wundef -Winit-self -Wpointer-arith -Wshadow -Wuninitialized -Wno-comment -Wimplicit-fallthrough=3 -Wno-strict-overflow -fdiagnostics-show-option -pthread -fomit-frame-pointer -ffunction-sections -fdata-sections    -fvisibility=hidden -g  -O0 -DDEBUG -D_DEBUG
    Linker flags (Release):      -Wl,--gc-sections -Wl,--as-needed  
    Linker flags (Debug):        -Wl,--gc-sections -Wl,--as-needed  
    ccache:                      NO
    Precompiled headers:         NO
    Extra dependencies:          m pthread /usr/lib/aarch64-linux-gnu/libGL.so /usr/lib/aarch64-linux-gnu/libGLU.so cudart_static dl rt nppc nppial nppicc nppicom nppidei nppif nppig nppim nppist nppisu nppitc npps cublas cudnn cufft -L/usr/local/cuda-10.2/lib64 -L/usr/lib/aarch64-linux-gnu
    3rdparty dependencies:

  OpenCV modules:
    To be built:                 alphamat aruco bgsegm bioinspired calib3d ccalib core cudaarithm cudabgsegm cudacodec cudafeatures2d cudafilters cudaimgproc cudalegacy cudaobjdetect cudaoptflow cudastereo cudawarping cudev cvv datasets dnn dnn_objdetect dnn_superres dpm face features2d flann freetype fuzzy gapi hdf hfs highgui img_hash imgcodecs imgproc intensity_transform line_descriptor mcc ml objdetect optflow phase_unwrapping photo plot python2 python3 quality rapid reg rgbd saliency sfm shape stereo stitching structured_light superres surface_matching text tracking ts video videoio videostab xfeatures2d ximgproc xobjdetect xphoto
    Disabled:                    world
    Disabled by dependency:      -
    Unavailable:                 cnn_3dobj java julia matlab ovis viz
    Applications:                tests perf_tests apps
    Documentation:               NO
    Non-free algorithms:         NO

  GUI: 
    QT:                          YES (ver 5.9.5)
      QT OpenGL support:         YES (Qt5::OpenGL 5.9.5)
    GTK+:                        NO
    OpenGL support:              YES (/usr/lib/aarch64-linux-gnu/libGL.so /usr/lib/aarch64-linux-gnu/libGLU.so)
    VTK support:                 NO

  Media I/O: 
    ZLib:                        /usr/lib/aarch64-linux-gnu/libz.so (ver 1.2.11)
    JPEG:                        /usr/lib/aarch64-linux-gnu/libjpeg.so (ver 80)
    WEBP:                        build (ver encoder: 0x020f)
    PNG:                         /usr/lib/aarch64-linux-gnu/libpng.so (ver 1.6.34)
    TIFF:                        /usr/lib/aarch64-linux-gnu/libtiff.so (ver 42 / 4.0.9)
    JPEG 2000:                   build (ver 2.3.1)
    OpenEXR:                     build (ver 2.3.0)
    HDR:                         YES
    SUNRASTER:                   YES
    PXM:                         YES
    PFM:                         YES

  Video I/O:
    DC1394:                      YES (2.2.5)
    FFMPEG:                      YES
      avcodec:                   YES (57.107.100)
      avformat:                  YES (57.83.100)
      avutil:                    YES (55.78.100)
      swscale:                   YES (4.8.100)
      avresample:                YES (3.7.0)
    GStreamer:                   YES (1.14.5)
    v4l/v4l2:                    YES (linux/videodev2.h)

  Parallel framework:            TBB (ver 2017.0 interface 9107)

  Trace:                         YES (with Intel ITT)

  Other third-party libraries:
    Lapack:                      NO
    Eigen:                       YES (ver 3.3.4)
    Custom HAL:                  YES (carotene (ver 0.0.1))
    Protobuf:                    build (3.5.1)

  NVIDIA CUDA:                   YES (ver 10.2, CUFFT CUBLAS FAST_MATH)
    NVIDIA GPU arch:             72
    NVIDIA PTX archs:

  cuDNN:                         YES (ver 8.0.0)

  OpenCL:                        YES (no extra features)
    Include path:                /home/dronemaitre/Documents/opencv_cpp/opencv/3rdparty/include/opencl/1.2
    Link libraries:              Dynamic load

  Python 2:
    Interpreter:                 /usr/bin/python2.7 (ver 2.7.17)
    Libraries:                   /usr/lib/aarch64-linux-gnu/libpython2.7.so (ver 2.7.17)
    numpy:                       /usr/lib/python2.7/dist-packages/numpy/core/include (ver 1.13.3)
    install path:                lib/python2.7/dist-packages/cv2/python-2.7

  Python 3:
    Interpreter:                 /usr/bin/python3 (ver 3.6.9)
    Libraries:                   /usr/lib/aarch64-linux-gnu/libpython3.6m.so (ver 3.6.9)
    numpy:                       /usr/lib/python3/dist-packages/numpy/core/include (ver 1.13.3)
    install path:                lib/python3.6/dist-packages/cv2/python-3.6

  Python (for build):            /usr/bin/python2.7

  Java:                          
    ant:                         NO
    JNI:                         NO
    Java wrappers:               NO
    Java tests:                  NO

  Install to:                    /usr/local
-----------------------------------------------------------------

OpenCV 似乎找到了 Cuda，但在这里我们可以再次看到 NVCUVID 没有添加，所以我把 -D NVCUVID=ON 正如你所说的那样，它可能会被忽略，因为与我的配置不兼容。 编辑： 在我的构建文件夹中运行的 ccmake 命令给了我这个输出：

ANT_EXECUTABLE                   ANT_EXECUTABLE-NOTFOUND                                           
 Atlas_BLAS_LIBRARY               /usr/lib/aarch64-linux-gnu/libatlas.so                            
 Atlas_CBLAS_INCLUDE_DIR          /usr/include/aarch64-linux-gnu                                    
 Atlas_CBLAS_LIBRARY              /usr/lib/aarch64-linux-gnu/libcblas.so                            
 Atlas_CLAPACK_INCLUDE_DIR        Atlas_CLAPACK_INCLUDE_DIR-NOTFOUND                                
 Atlas_LAPACK_LIBRARY             /usr/lib/aarch64-linux-gnu/liblapack.so                           
 BUILD_CUDA_STUBS                 OFF
 BUILD_DOCS                       OFF
 BUILD_EXAMPLES                   OFF
 BUILD_ITT                        ON 
 BUILD_JASPER                     OFF
 BUILD_JAVA                       ON 
 BUILD_JPEG                       OFF
 BUILD_LIST                          
 BUILD_OPENEXR                    OFF
 BUILD_PACKAGE                    ON 
 BUILD_PERF_TESTS                 ON 
 BUILD_PNG                        OFF
 BUILD_PROTOBUF                   ON 
 BUILD_SHARED_LIBS                ON 
 BUILD_TBB                        OFF
 BUILD_TESTS                      ON 
 BUILD_TIFF                       OFF
 BUILD_USE_SYMLINKS               OFF
 BUILD_WEBP                       OFF
 BUILD_WITH_DEBUG_INFO            OFF
 BUILD_WITH_DYNAMIC_IPP           OFF
 BUILD_ZLIB                       OFF
 BUILD_opencv_alphamat            ON 
 BUILD_opencv_apps                ON 
 BUILD_opencv_aruco               ON 
 BUILD_opencv_bgsegm              ON 
 BUILD_opencv_bioinspired         ON 
 BUILD_opencv_calib3d             ON 
 BUILD_opencv_ccalib              ON 
 BUILD_opencv_core                ON 
 BUILD_opencv_cudaarithm          ON 
 BUILD_opencv_cudabgsegm          ON 
 BUILD_opencv_cudacodec           ON 
 BUILD_opencv_cudafeatures2d      ON 
 BUILD_opencv_cudafilters         ON 
 BUILD_opencv_cudaimgproc         ON 
 BUILD_opencv_cudalegacy          ON 
 BUILD_opencv_cudaobjdetect       ON 
 BUILD_opencv_cudaoptflow         ON 
 BUILD_opencv_cudastereo          ON 
 BUILD_opencv_cudawarping         ON 
 BUILD_opencv_cudev               ON 
 BUILD_opencv_cvv                 ON 
 BUILD_opencv_datasets            ON 
 BUILD_opencv_dnn                 ON 
 BUILD_opencv_dnn_objdetect       ON 
 BUILD_opencv_dnn_superres        ON 
 BUILD_opencv_dpm                 ON 
 BUILD_opencv_face                ON 
 BUILD_opencv_features2d          ON 
 BUILD_opencv_flann               ON 
 BUILD_opencv_freetype            ON 
 BUILD_opencv_fuzzy               ON 
 BUILD_opencv_gapi                ON 
 BUILD_opencv_hdf                 ON 
 BUILD_opencv_hfs                 ON 
 BUILD_opencv_highgui             ON 
 BUILD_opencv_img_hash            ON 
 BUILD_opencv_imgcodecs           ON 
 BUILD_opencv_imgproc             ON 
 BUILD_opencv_intensity_transfo   ON 
 BUILD_opencv_java_bindings_gen   ON 
 BUILD_opencv_js                  OFF
 BUILD_opencv_line_descriptor     ON 
 BUILD_opencv_ml                  ON 
 BUILD_opencv_objdetect           ON 
 BUILD_opencv_optflow             ON 
 BUILD_opencv_phase_unwrapping    ON 
 BUILD_opencv_photo               ON 
 BUILD_opencv_plot                ON 
 BUILD_opencv_python2             ON 
 BUILD_opencv_python3             ON 
 BUILD_opencv_python_bindings_g   ON 
 BUILD_opencv_python_tests        ON 
 BUILD_opencv_quality             ON 
 BUILD_opencv_rapid               ON 
 BUILD_opencv_reg                 ON 
 BUILD_opencv_rgbd                ON 
 BUILD_opencv_saliency            ON 
 BUILD_opencv_sfm                 ON 
 BUILD_opencv_shape               ON 
 BUILD_opencv_stereo              ON 
 BUILD_opencv_stitching           ON 
 BUILD_opencv_structured_light    ON 
 BUILD_opencv_superres            ON 
 BUILD_opencv_surface_matching    ON 
 BUILD_opencv_text                ON 
 BUILD_opencv_tracking            ON 
 BUILD_opencv_ts                  ON 
 BUILD_opencv_video               ON 
 BUILD_opencv_videoio             ON 
 BUILD_opencv_videostab           ON 
 BUILD_opencv_world               OFF
 BUILD_opencv_xfeatures2d         ON  
 BUILD_opencv_ximgproc            ON 
 BUILD_opencv_xobjdetect          ON 
 BUILD_opencv_xphoto              ON 
 CAROTENE_NS                      carotene_o4t                                                      
 CCACHE_PROGRAM                   CCACHE_PROGRAM-NOTFOUND                                           
 CLAMDBLAS_INCLUDE_DIR            CLAMDBLAS_INCLUDE_DIR-NOTFOUND                                    
 CLAMDBLAS_ROOT_DIR               CLAMDBLAS_ROOT_DIR-NOTFOUND                                       
 CLAMDFFT_INCLUDE_DIR             CLAMDFFT_INCLUDE_DIR-NOTFOUND                                     
 CLAMDFFT_ROOT_DIR                CLAMDFFT_ROOT_DIR-NOTFOUND                                        
 CMAKE_BUILD_TYPE                 RELEASE                                                           
 CMAKE_CONFIGURATION_TYPES        Debug;Release                                                     
 CMAKE_INSTALL_PREFIX             /usr/local                                                        
 CPU_BASELINE                     NEON;FP16                                                         
 CPU_BASELINE_DISABLE             ;VFPV3                                                            
 CPU_BASELINE_REQUIRE             ;NEON                                                             
 CPU_DISPATCH                        
 CUDA_ARCH_BIN                    7.2
 CUDA_ARCH_PTX                       
 CUDA_FAST_MATH                   ON 
 CUDA_GENERATION                     
 CUDA_HOST_COMPILER               /usr/bin/cc                                                       
 CUDA_TOOLKIT_ROOT_DIR            /usr/local/cuda-10.2                                              
 CUDA_USE_STATIC_CUDA_RUNTIME     ON 
 CUDA_rt_LIBRARY                  /usr/lib/aarch64-linux-gnu/librt.so                               
 CV_DISABLE_OPTIMIZATION          OFF
 CV_ENABLE_INTRINSICS             ON 
 CV_TRACE                         ON 
 Caffe_INCLUDE_DIR                Caffe_INCLUDE_DIR-NOTFOUND                                        
 Caffe_LIBS                       Caffe_LIBS-NOTFOUND                                               
 Ceres_DIR                        Ceres_DIR-NOTFOUND                                                
 ENABLE_BUILD_HARDENING           OFF
 ENABLE_CCACHE                    ON 
 ENABLE_CONFIG_VERIFICATION       OFF
 ENABLE_COVERAGE                  OFF
 ENABLE_FAST_MATH                 ON 
 ENABLE_FLAKE8                    OFF
 ENABLE_GNU_STL_DEBUG             OFF
 ENABLE_IMPL_COLLECTION           OFF
 ENABLE_INSTRUMENTATION           OFF
 ENABLE_LTO                       OFF
 ENABLE_NEON                      ON 
 ENABLE_NOISY_WARNINGS            OFF
 ENABLE_OMIT_FRAME_POINTER        ON 
 ENABLE_PIC                       ON 
 ENABLE_PRECOMPILED_HEADERS       OFF
 ENABLE_PROFILING                 OFF
 ENABLE_PYLINT                    OFF
 ENABLE_SOLUTION_FOLDERS          OFF
 ENABLE_VFPV3                     OFF
 EXECUTABLE_OUTPUT_PATH           /home/dronemaitre/Documents/opencv_cpp/opencv/build/bin           
 Eigen3_DIR                       /usr/lib/cmake/eigen3                                             
 GENERATE_ABI_DESCRIPTOR          OFF
 Glog_LIBS                        /usr/lib/aarch64-linux-gnu/libglog.so                             
 HDF5_C_LIBRARY_dl                /usr/lib/aarch64-linux-gnu/libdl.so                               
 HDF5_C_LIBRARY_hdf5              /usr/lib/aarch64-linux-gnu/hdf5/serial/libhdf5.so                 
 HDF5_C_LIBRARY_m                 /usr/lib/aarch64-linux-gnu/libm.so                                
 HDF5_C_LIBRARY_pthread           /usr/lib/aarch64-linux-gnu/libpthread.so                          
 HDF5_C_LIBRARY_sz                /usr/lib/aarch64-linux-gnu/libsz.so                               
 HDF5_C_LIBRARY_z                 /usr/lib/aarch64-linux-gnu/libz.so                                
 INSTALL_CREATE_DISTRIB           OFF
 INSTALL_C_EXAMPLES               OFF
 INSTALL_PYTHON_EXAMPLES          OFF
 INSTALL_TESTS                    OFF
 INSTALL_TO_MANGLED_PATHS         OFF
 LAPACKE_INCLUDE_DIR              LAPACKE_INCLUDE_DIR-NOTFOUND                                      
 LAPACK_CBLAS_H                      
 LAPACK_IMPL                      Unknown                                                           
 LAPACK_INCLUDE_DIR                  
 LAPACK_LAPACKE_H                    
 LAPACK_LIBRARIES                    
 Lept_LIBRARY                     Lept_LIBRARY-NOTFOUND                                             
 MKL_INCLUDE_DIRS                 MKL_ROOT_DIR-NOTFOUND/include                                     
 MKL_LAPACKE_INCLUDE_DIR          MKL_LAPACKE_INCLUDE_DIR-NOTFOUND                                  
 MKL_ROOT_DIR                     MKL_ROOT_DIR-NOTFOUND                                             
 MKL_WITH_OPENMP                  OFF
 MKL_WITH_TBB                     OFF
 OGRE_DIR                         OGRE_DIR-NOTFOUND                                                 
 OPENCL_FOUND                     ON 
 OPENCV_CONFIG_FILE_INCLUDE_DIR   /home/dronemaitre/Documents/opencv_cpp/opencv/build               
 OPENCV_DNN_CUDA                  OFF
 OPENCV_DNN_OPENCL                ON 
 OPENCV_DOWNLOAD_PATH             /home/dronemaitre/Documents/opencv_cpp/opencv/.cache              
 OPENCV_DUMP_HOOKS_FLOW           OFF
 OPENCV_ENABLE_ALLOCATOR_STATS    ON 
 OPENCV_ENABLE_ATOMIC_LONG_LONG   OFF
 OPENCV_ENABLE_MEMALIGN           ON 
 OPENCV_ENABLE_MEMORY_SANITIZER   OFF
 OPENCV_ENABLE_NONFREE            OFF
 OPENCV_EXTRA_MODULES_PATH        /home/dronemaitre/Documents/opencv_cpp/opencv_contrib/modules     
 OPENCV_FORCE_3RDPARTY_BUILD      OFF
 OPENCV_FORCE_PYTHON_LIBS         OFF
 OPENCV_GENERATE_PKGCONFIG        ON 
 OPENCV_GENERATE_SETUPVARS        ON 
 OPENCV_JAVA_SOURCE_VERSION          
 OPENCV_JAVA_TARGET_VERSION          
 OPENCV_MATHJAX_RELPATH           https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.0              
 OPENCV_PYTHON3_VERSION           OFF
 OPENCV_TIMESTAMP                 2021-01-18T12:55:10Z                                              
 OPENCV_WARNINGS_ARE_ERRORS       OFF
 OPENEXR_INCLUDE_PATH             OPENEXR_INCLUDE_PATH-NOTFOUND   
 OpenCV_HAL_DIR                   OpenCV_HAL_DIR-NOTFOUND                                           
 OpenJPEG_DIR                     OpenJPEG_DIR-NOTFOUND                                             
 PROTOBUF_UPDATE_FILES            OFF
 PYTHON2_EXECUTABLE               /usr/bin/python2.7                                                
 PYTHON2_INCLUDE_DIR              /usr/include/python2.7                                            
 PYTHON2_INCLUDE_DIR2                
 PYTHON2_LIBRARY                  /usr/lib/aarch64-linux-gnu/libpython2.7.so                        
 PYTHON2_LIBRARY_DEBUG               
 PYTHON2_NUMPY_INCLUDE_DIRS       /usr/lib/python2.7/dist-packages/numpy/core/include               
 PYTHON2_PACKAGES_PATH            lib/python2.7/dist-packages                                       
 PYTHON3_EXECUTABLE               /usr/bin/python3                                                  
 PYTHON3_INCLUDE_DIR              /usr/include/python3.6m                                           
 PYTHON3_INCLUDE_DIR2                
 PYTHON3_LIBRARY                  /usr/lib/aarch64-linux-gnu/libpython3.6m.so                       
 PYTHON3_LIBRARY_DEBUG               
 PYTHON3_NUMPY_INCLUDE_DIRS       /usr/lib/python3/dist-packages/numpy/core/include                 
 PYTHON3_PACKAGES_PATH            lib/python3.6/dist-packages                                       
 Qt5Concurrent_DIR                /usr/lib/aarch64-linux-gnu/cmake/Qt5Concurrent                    
 Qt5Core_DIR                      /usr/lib/aarch64-linux-gnu/cmake/Qt5Core                          
 Qt5Gui_DIR                       /usr/lib/aarch64-linux-gnu/cmake/Qt5Gui                           
 Qt5OpenGL_DIR                    /usr/lib/aarch64-linux-gnu/cmake/Qt5OpenGL                        
 Qt5Test_DIR                      /usr/lib/aarch64-linux-gnu/cmake/Qt5Test                          
 Qt5Widgets_DIR                   /usr/lib/aarch64-linux-gnu/cmake/Qt5Widgets                       
 Qt5_DIR                          /usr/lib/aarch64-linux-gnu/cmake/Qt5                              
 TBB_DIR                          TBB_DIR-NOTFOUND                                                  
 TBB_ENV_INCLUDE                  /usr/include                                                      
 TBB_ENV_LIB                      /usr/lib/aarch64-linux-gnu/libtbb.so                              
 TBB_ENV_LIB_DEBUG                TBB_ENV_LIB_DEBUG-NOTFOUND                                        
 TBB_VER_FILE                     /usr/include/tbb/tbb_stddef.h                                     
 Tesseract_DIR                    Tesseract_DIR-NOTFOUND                                            
 Tesseract_INCLUDE_DIR            Tesseract_INCLUDE_DIR-NOTFOUND                                    
 Tesseract_LIBRARY                Tesseract_LIBRARY-NOTFOUND                                        
 VTK_DIR                          VTK_DIR-NOTFOUND                                                  
 WEBP_INCLUDE_DIR                 WEBP_INCLUDE_DIR-NOTFOUND                                         
 WITH_1394                        ON 
 WITH_ADE                         ON 
 WITH_ARAVIS                      OFF
 WITH_CAROTENE                    ON 
 WITH_CLP                         OFF
 WITH_CUBLAS                      ON 
 WITH_CUDA                        ON 
 WITH_CUDNN                       ON 
 WITH_CUFFT                       ON 
 WITH_EIGEN                       ON 
 WITH_FFMPEG                      ON 
 WITH_FREETYPE                    OFF
 WITH_GDAL                        OFF
 WITH_GDCM                        OFF
 WITH_GPHOTO2                     OFF
 WITH_GSTREAMER                   ON         
 WITH_GTK                         ON 
 WITH_GTK_2_X                     OFF
 WITH_HALIDE                      OFF
 WITH_HPX                         OFF
 WITH_IMGCODEC_HDR                ON 
 WITH_IMGCODEC_PFM                ON 
 WITH_IMGCODEC_PXM                ON 
 WITH_IMGCODEC_SUNRASTER          ON 
 WITH_INF_ENGINE                  OFF
 WITH_ITT                         ON 
 WITH_JASPER                      ON 
 WITH_JPEG                        ON 
 WITH_LAPACK                      ON 
 WITH_LIBREALSENSE                OFF
 WITH_MATLAB                      OFF
 WITH_MFX                         OFF
 WITH_NGRAPH                      OFF
 WITH_NVCUVID                     ON 
 WITH_OPENCL                      ON 
 WITH_OPENCLAMDBLAS               ON 
 WITH_OPENCLAMDFFT                ON 
 WITH_OPENCL_SVM                  OFF
 WITH_OPENEXR                     ON 
 WITH_OPENGL                      ON 
 WITH_OPENJPEG                    ON 
 WITH_OPENMP                      OFF
 WITH_OPENNI                      OFF
 WITH_OPENNI2                     OFF
 WITH_OPENVX                      OFF
 WITH_PLAIDML                     OFF
 WITH_PNG                         ON 
 WITH_PROTOBUF                    ON 
 WITH_PTHREADS_PF                 ON 
 WITH_PVAPI                       OFF
 WITH_QT                          ON 
 WITH_QUIRC                       ON 
 WITH_TBB                         ON 
 WITH_TENGINE                     OFF
 WITH_TESSERACT                   ON 
 WITH_TIFF                        ON 
 WITH_V4L                         ON 
 WITH_VA                          OFF
 WITH_VA_INTEL                    OFF
 WITH_VTK                         ON 
 WITH_VULKAN                      OFF
 WITH_WEBP                        ON 
 WITH_XIMEA                       OFF
 WITH_XINE                        OFF
 opencv_dnn_PERF_CAFFE            OFF
 opencv_dnn_PERF_CLCAFFE          OFF

我们可以看到 CUDA 已启用 imo，但 NVCUVID 也已启用，即使我认为直到现在才启用

结束编辑

最后我会在当前构建结束时尝试 ccmake 函数并编辑或发布结果。

再次感谢大家的支持！！

【问题讨论】：

您的显卡是否符合您在配置中假设的要求（例如 CUDA 功能）？特别是它是否支持 cuda arch 5.3？
Jetson Xavier 设备的计算能力为 7.2
代码中的fname 是什么？你也制作了NVCUVID = ON，但真的是这样吗？你在cmake完成后检查了吗？您是否也可以尝试步骤 6 here 中的示例，以确保您正确安装了 cuda 并且运行良好？

标签： c++ opencv cmake cuda nvidia

【解决方案1】：

（此答案只是推测性的；如果您发布有关 CMake 构建日志的信息，我将（可能）对其进行编辑。）

OpenCV 告诉你它有no_cuda，即CUDA functionality is disabled for current build or platform

这意味着两件事之一：

尽管您的“最佳意图”设置了一堆 CMake 标志，但您的 OpenCV 是在没有 CUDA 支持的情况下构建的。这是很有可能的，因为有时-D 值会被忽略以支持检测到的内容，或者如果没有某些附加设置等就无法应用。您应该尝试在构建目录中使用ccmake，看看会发生什么。
构建启用了 CUDA，但 OpenCV 代码无法找到 CUDA 驱动程序、CUDA 运行时库或可用的响应式 GPU 等。我不是 OpenCV 专家，但假设它提供了一些日志记录工具，我会检查一下。 @user2986898 补充说，您可以使用 cv::getBuildInformation() 函数在运行时获取构建信息。

为 OpenCV 构建测试或示例并检查它们是否有效也可能很有用。

【讨论】：

为了更好地衡量，您还可以使用 cv::getBuildInformation() 检查最终构建的功能。（返回一个包含使用设置的字符串）
Opencv 不再支持，但包括最新版本（cuda-11.0）在内的所有 cuda 版本都可以正常工作。还有很多技巧可以解决其他问题。我已经尝试了这些组合并且运行良好：(opencv 4.3.0, cuda 10.2, ubuntu 18.04) (opencv 4.1.0, cuda 11.0, ubuntu 18.04)

【解决方案2】：

我花了两个多星期/几十个小时才终于让它工作（我的配置是相似的）。这是我所做的（我希望我能记住一切）：

我的系统： i7-4790 上的 Ubuntu 18.04 + GTX1050Ti（驱动程序版本 460.39）+ CUDA 10.2 + OpenCV 4.5.1 + ffmpeg OpenCV 和 ffmpeg 是在 CUDA 支持下构建的。
OpenCV 构建选项：

    cmake -D CMAKE_BUILD_TYPE=RELEASE \
    -D CMAKE_C_COMPILER=/usr/bin/gcc-7 \
    -D CMAKE_INSTALL_PREFIX=/usr/local \
    -D INSTALL_PYTHON_EXAMPLES=ON \
    -D INSTALL_C_EXAMPLES=ON \
    -D WITH_TBB=ON \
    -D WITH_CUDA=ON \
    -D WITH_NVCUVID=ON \
    -D WITH_NVCUVENC=OFF \
    -D BUILD_opencv_cudacodec=ON \
    -D WITH_CUDNN=OFF \
    -D OPENCV_DNN_CUDA=OFF \
    -D CUDA_ARCH_BIN=6.1 \
    -D ENABLE_FAST_MATH=1 \
    -D CUDA_FAST_MATH=1 \
    -D WITH_CUBLAS=1 \
    -D WITH_V4L=ON \
    -D WITH_QT=ON \
    -D WITH_OPENGL=ON \
    -D WITH_GSTREAMER=ON \
    -D OPENCV_GENERATE_PKGCONFIG=ON \
    -D OPENCV_PC_FILE_NAME=opencv4.pc \
    -D OPENCV_ENABLE_NONFREE=ON \
    -D OPENCV_PYTHON3_INSTALL_PATH=/usr/lib/python3.6/site-packages \
    -D OPENCV_EXTRA_MODULES_PATH=/path/to/opencv_contrib-4.5.1/modules \
    -D PYTHON_EXECUTABLE="/usr/bin/python2" \
    -D PYTHON_DEFAULT_EXECUTABLE="/usr/bin/python3" \
    -D PYTHON3_EXECUTABLE="/usr/bin/python3" \
    -D BUILD_EXAMPLES=ON ..

ffmpeg - 我使用了许多关于使用 CUDA 支持构建 ffmepg 的广泛可用教程之一，我的构建如下所示：

    ffmpeg version N-101174-g14dc28e969 Copyright (c) 2000-2021 the FFmpeg developers
      built with gcc 7 (Ubuntu 7.5.0-3ubuntu1~18.04)
      configuration: --prefix=/home/lg/ffmpeg_build2 --pkg-config-flags=--static --extra-cflags=-I/home/lg/ffmpeg_build2/include --extra-ldflags=-L/home/lg/ffmpeg_build2/lib --extra-libs='-lpthread -lm' --bindir=/home/lg/bin2 --enable-cuda --enable-cuvid --enable-libnpp --extra-cflags=-I/usr/local/cuda/include/ --extra-ldflags=-L/usr/local/cuda/lib64/ --enable-gpl --enable-opencl --enable-opengl --enable-libass --enable-libfreetype --enable-libmp3lame --enable-libopus --enable-libvorbis --enable-libfdk-aac --enable-libvpx --enable-libx264 --enable-libx265 --enable-nvenc --enable-vaapi --enable-vdpau --enable-nonfree --cpu=native --extra-cflags='-march=native'

虽然编译OpenCV 4.5.1是成功的，但是使用简单cv::cudacodec::createVideoReader()的c++样例没有工作，错误是

    The function/feature is not implemented) The called functionality is disabled for current build or platform in function 'throw_no_cuda'

我下载了 NVIDIA 的 Video_Codec_SDK_10.0.26 并将 nvcuvid.h、cuviddec.h 和 nvEncodeAPI.h 从 /Interface 复制到 CUDA 的包含目录（在我的情况下为 /usr/local/cuda-10.2/targets/x86_64-linux/include）和 /usr/inlcude。可能没有必要将所有这些文件都放在这两个位置。
再次重新编译 OpenCV。设置这两个选项至关重要：

    -D WITH_NVCUVID=ON \
    -D BUILD_opencv_cudacodec=ON \

没有它们，OpenCV 就没有安装 NVCUVID 模块。编译失败并出现错误，它抱怨 cudaVideoCodec_AV1 未声明或类似的东西，在文件 opencv_contrib-4.5.1/modules/cudacodec/src/video_decoder.cpp 的第 81 行。由于我不打算使用 AV1，所以我简单地删除了这一行。之后编译终于成功了。

是时候检查 CUDA VideoReader 示例了 - 解码 H264 有效！但 HEVC 没有 - 错误是 opencv_contrib-4.5.1/modules/cudacodec/src/ffmpeg_video_source.cpp 中的未知 FourCC 代码（我的视频有“hev1”FourCC）。所以我添加了缺失的定义：

    case CV_FOURCC_MACRO('H', '2', '6', '5'): // fallthru
    case CV_FOURCC_MACRO('h', '2', '6', '5'): // fallthru
    case CV_FOURCC_MACRO('h', 'e', 'v', 'c'): return HEVC;

改为：

    case CV_FOURCC_MACRO('H', '2', '6', '5'): // fallthru
    case CV_FOURCC_MACRO('h', '2', '6', '5'): // fallthru
    case CV_FOURCC_MACRO('h', 'e', 'v', '1'): // fallthru
    case CV_FOURCC_MACRO('h', 'v', 'c', '1'): // fallthru
    case CV_FOURCC_MACRO('h', 'e', 'v', 'c'): return HEVC;

然后最后一次重新编译OpenCV，终于一切正常了。

【讨论】：