OpenCV 编译过程失败

【问题标题】：OpenCV compile process failsOpenCV 编译过程失败
【发布时间】：2018-02-20 12:56:53
【问题描述】：

所以我正在关注this 关于如何为 Python 3 安装 openCV 的帖子。我在编译过程中遇到了一些问题。运行 make -j4 命令运行良好，直到运行 28% 时我收到以下错误消息：error: use of undeclared identifier 'avcodec_free_frame'; did you mean 'avcodec_get_name'?

我什至不知道从哪里开始解决这个问题。我已经通过 brew 安装了 ffmpeg。

完整的命令列表：

cd ~
git clone https://github.com/Itseez/opencv.git
cd opencv
git checkout 3.0.0
cd ~
git clone https://github.com/Itseez/opencv_contrib.git
cd opencv_contrib
git checkout 3.0.0
cd ~/opencv
mkdir build
cd build
cmake CMAKE_BUILD_TYPE=RELEASE \
    -D CMAKE_INSTALL_PREFIX=/usr/local \
    -D OPENCV_EXTRA_MODULES_PATH=~/opencv_contrib/modules \
    -D PYTHON3_LIBRARY=/usr/local/Cellar/python3/3.5.2_3/Frameworks/Python.framework/Versions/3.5/lib/python3.5/config-3.5m/libpython3.5.dylib \
    -D PYTHON3_INCLUDE_DIR=/usr/local/Cellar/python3/3.5.2_3/Frameworks/Python.framework/Versions/3.5/include/python3.5m/ \
    -D PYTHON3_EXECUTABLE=$VIRTUAL_ENV/bin/python \
    -D BUILD_opencv_python2=OFF \
    -D BUILD_opencv_python3=ON \
    -D INSTALL_PYTHON_EXAMPLES=ON \
    -D INSTALL_C_EXAMPLES=OFF \
    -D BUILD_EXAMPLES=ON .. \
    -D FFMPEG_INCLUDE_DIR=/usr/local/Cellar/ffmpeg/3.3.4/include/
    -D FFMPEG_LIB_DIR=/usr/local/Cellar/ffmpeg/3.3.4/lib/
    -D WITH_FFMPEG=ON
cmake
make -j4

我从这个帖子中得到了FFMPEG_INCLUDE_DIR、FFMPEG_LIB_DIR 和WITH_FFMPEG：http://blog.jiashen.me/2014/12/23/build-opencv-3-on-mac-os-x-with-python-3-and-ffmpeg-support/

完整的错误日志：

[ 28%] Building CXX object modules/videoio/CMakeFiles/opencv_videoio.dir/src/cap_qtkit.mm.o
In file included from /Users/myuser/opencv/modules/videoio/src/cap_ffmpeg.cpp:45:
/Users/myuser/opencv/modules/videoio/src/cap_ffmpeg_impl.hpp:317:9: error: use of undeclared identifier
      'avcodec_free_frame'; did you mean 'avcodec_get_name'?
        avcodec_free_frame(&picture);
        ^~~~~~~~~~~~~~~~~~
        avcodec_get_name
/usr/local/Cellar/ffmpeg/3.3.4/include/libavcodec/avcodec.h:6289:13: note: 'avcodec_get_name' declared here
const char *avcodec_get_name(enum AVCodecID id);
            ^
In file included from /Users/myuser/opencv/modules/videoio/src/cap_ffmpeg.cpp:45:
/Users/myuser/opencv/modules/videoio/src/cap_ffmpeg_impl.hpp:317:28: error: cannot initialize a parameter of type
      'enum AVCodecID' with an rvalue of type 'AVFrame **'
        avcodec_free_frame(&picture);
                           ^~~~~~~~
/usr/local/Cellar/ffmpeg/3.3.4/include/libavcodec/avcodec.h:6289:45: note: passing argument to parameter 'id' here
const char *avcodec_get_name(enum AVCodecID id);
                                            ^
In file included from /Users/myuser/opencv/modules/videoio/src/cap_ffmpeg.cpp:45:
/Users/myuser/opencv/modules/videoio/src/cap_ffmpeg_impl.hpp:632:23: error: use of undeclared identifier
      'avcodec_alloc_frame'
            picture = avcodec_alloc_frame();
                      ^
/Users/myuser/opencv/modules/videoio/src/cap_ffmpeg_impl.hpp:635:41: error: use of undeclared identifier
      'PIX_FMT_BGR24'; did you mean 'AV_PIX_FMT_BGR24'?
                    avpicture_get_size( PIX_FMT_BGR24,
                                        ^~~~~~~~~~~~~
                                        AV_PIX_FMT_BGR24
/usr/local/Cellar/ffmpeg/3.3.4/include/libavutil/pixfmt.h:65:5: note: 'AV_PIX_FMT_BGR24' declared here
    AV_PIX_FMT_BGR24,     ///< packed RGB 8:8:8, 24bpp, BGRBGR...
    ^
In file included from /Users/myuser/opencv/modules/videoio/src/cap_ffmpeg.cpp:45:
/Users/myuser/opencv/modules/videoio/src/cap_ffmpeg_impl.hpp:638:29: error: use of undeclared identifier
      'PIX_FMT_BGR24'; did you mean 'AV_PIX_FMT_BGR24'?
                            PIX_FMT_BGR24, enc->width, enc->height );
                            ^~~~~~~~~~~~~
                            AV_PIX_FMT_BGR24
/usr/local/Cellar/ffmpeg/3.3.4/include/libavutil/pixfmt.h:65:5: note: 'AV_PIX_FMT_BGR24' declared here
    AV_PIX_FMT_BGR24,     ///< packed RGB 8:8:8, 24bpp, BGRBGR...
    ^
In file included from /Users/myuser/opencv/modules/videoio/src/cap_ffmpeg.cpp:45:
/Users/myuser/opencv/modules/videoio/src/cap_ffmpeg_impl.hpp:738:67: error: use of undeclared identifier
      'PIX_FMT_RGB24'; did you mean 'AV_PIX_FMT_RGB24'?
    avpicture_fill((AVPicture*)&rgb_picture, rgb_picture.data[0], PIX_FMT_RGB24,
                                                                  ^~~~~~~~~~~~~
                                                                  AV_PIX_FMT_RGB24
/usr/local/Cellar/ffmpeg/3.3.4/include/libavutil/pixfmt.h:64:5: note: 'AV_PIX_FMT_RGB24' declared here
    AV_PIX_FMT_RGB24,     ///< packed RGB 8:8:8, 24bpp, RGBRGB...
    ^
In file included from /Users/myuser/opencv/modules/videoio/src/cap_ffmpeg.cpp:45:
/Users/myuser/opencv/modules/videoio/src/cap_ffmpeg_impl.hpp:756:17: error: use of undeclared identifier
      'PIX_FMT_BGR24'; did you mean 'AV_PIX_FMT_BGR24'?
                PIX_FMT_BGR24,
                ^~~~~~~~~~~~~
                AV_PIX_FMT_BGR24
/usr/local/Cellar/ffmpeg/3.3.4/include/libavutil/pixfmt.h:65:5: note: 'AV_PIX_FMT_BGR24' declared here
    AV_PIX_FMT_BGR24,     ///< packed RGB 8:8:8, 24bpp, BGRBGR...
    ^
In file included from /Users/myuser/opencv/modules/videoio/src/cap_ffmpeg.cpp:45:
/Users/myuser/opencv/modules/videoio/src/cap_ffmpeg_impl.hpp:1110:15: error: use of undeclared identifier
      'avcodec_alloc_frame'
    picture = avcodec_alloc_frame();
              ^
/Users/myuser/opencv/modules/videoio/src/cap_ffmpeg_impl.hpp:1113:33: error: unknown type name 'PixelFormat'; did you
      mean 'AVPixelFormat'?
    size = avpicture_get_size( (PixelFormat) pix_fmt, width, height);
                                ^~~~~~~~~~~
                                AVPixelFormat
/usr/local/Cellar/ffmpeg/3.3.4/include/libavutil/pixfmt.h:60:6: note: 'AVPixelFormat' declared here
enum AVPixelFormat {
     ^
In file included from /Users/myuser/opencv/modules/videoio/src/cap_ffmpeg.cpp:45:
/Users/myuser/opencv/modules/videoio/src/cap_ffmpeg_impl.hpp:1122:25: error: unknown type name 'PixelFormat'; did you
      mean 'AVPixelFormat'?
                       (PixelFormat) pix_fmt, width, height);
                        ^~~~~~~~~~~
                        AVPixelFormat
/usr/local/Cellar/ffmpeg/3.3.4/include/libavutil/pixfmt.h:60:6: note: 'AVPixelFormat' declared here
enum AVPixelFormat {
     ^
In file included from /Users/myuser/opencv/modules/videoio/src/cap_ffmpeg.cpp:45:
/Users/myuser/opencv/modules/videoio/src/cap_ffmpeg_impl.hpp:1230:19: error: unknown type name 'PixelFormat'; did you
      mean 'AVPixelFormat'?
    c->pix_fmt = (PixelFormat) pixel_format;
                  ^~~~~~~~~~~
                  AVPixelFormat
/usr/local/Cellar/ffmpeg/3.3.4/include/libavutil/pixfmt.h:60:6: note: 'AVPixelFormat' declared here
enum AVPixelFormat {
     ^
In file included from /Users/myuser/opencv/modules/videoio/src/cap_ffmpeg.cpp:45:
/Users/myuser/opencv/modules/videoio/src/cap_ffmpeg_impl.hpp:1405:26: error: use of undeclared identifier
      'PIX_FMT_BGR24'; did you mean 'AV_PIX_FMT_BGR24'?
    if (input_pix_fmt == PIX_FMT_BGR24) {
                         ^~~~~~~~~~~~~
                         AV_PIX_FMT_BGR24
/usr/local/Cellar/ffmpeg/3.3.4/include/libavutil/pixfmt.h:65:5: note: 'AV_PIX_FMT_BGR24' declared here
    AV_PIX_FMT_BGR24,     ///< packed RGB 8:8:8, 24bpp, BGRBGR...
    ^
In file included from /Users/myuser/opencv/modules/videoio/src/cap_ffmpeg.cpp:45:
/Users/myuser/opencv/modules/videoio/src/cap_ffmpeg_impl.hpp:1410:31: error: use of undeclared identifier
      'PIX_FMT_GRAY8'; did you mean 'AV_PIX_FMT_GRAY8'?
    else if (input_pix_fmt == PIX_FMT_GRAY8) {
                              ^~~~~~~~~~~~~
                              AV_PIX_FMT_GRAY8
/usr/local/Cellar/ffmpeg/3.3.4/include/libavutil/pixfmt.h:70:5: note: 'AV_PIX_FMT_GRAY8' declared here
    AV_PIX_FMT_GRAY8,     ///<        Y        ,  8bpp
    ^
In file included from /Users/myuser/opencv/modules/videoio/src/cap_ffmpeg.cpp:45:
/Users/myuser/opencv/modules/videoio/src/cap_ffmpeg_impl.hpp:1423:25: error: unknown type name 'PixelFormat'; did you
      mean 'AVPixelFormat'?
                       (PixelFormat)input_pix_fmt, width, height);
                        ^~~~~~~~~~~
                        AVPixelFormat
/usr/local/Cellar/ffmpeg/3.3.4/include/libavutil/pixfmt.h:60:6: note: 'AVPixelFormat' declared here
enum AVPixelFormat {
     ^
In file included from /Users/myuser/opencv/modules/videoio/src/cap_ffmpeg.cpp:45:
/Users/myuser/opencv/modules/videoio/src/cap_ffmpeg_impl.hpp:1429:47: error: unknown type name 'PixelFormat'; did you
      mean 'AVPixelFormat'?
                                             (PixelFormat)input_pix_fmt,
                                              ^~~~~~~~~~~
                                              AVPixelFormat
/usr/local/Cellar/ffmpeg/3.3.4/include/libavutil/pixfmt.h:60:6: note: 'AVPixelFormat' declared here
enum AVPixelFormat {
     ^
In file included from /Users/myuser/opencv/modules/videoio/src/cap_ffmpeg.cpp:45:
/Users/myuser/opencv/modules/videoio/src/cap_ffmpeg_impl.hpp:1447:25: error: unknown type name 'PixelFormat'; did you
      mean 'AVPixelFormat'?
                       (PixelFormat)input_pix_fmt, width, height);
                        ^~~~~~~~~~~
                        AVPixelFormat
/usr/local/Cellar/ffmpeg/3.3.4/include/libavutil/pixfmt.h:60:6: note: 'AVPixelFormat' declared here
enum AVPixelFormat {
     ^
In file included from /Users/myuser/opencv/modules/videoio/src/cap_ffmpeg.cpp:45:
/Users/myuser/opencv/modules/videoio/src/cap_ffmpeg_impl.hpp:1604:25: error: use of undeclared identifier
      'PIX_FMT_BGR24'; did you mean 'AV_PIX_FMT_BGR24'?
        input_pix_fmt = PIX_FMT_BGR24;
                        ^~~~~~~~~~~~~
                        AV_PIX_FMT_BGR24
/usr/local/Cellar/ffmpeg/3.3.4/include/libavutil/pixfmt.h:65:5: note: 'AV_PIX_FMT_BGR24' declared here
    AV_PIX_FMT_BGR24,     ///< packed RGB 8:8:8, 24bpp, BGRBGR...
    ^
In file included from /Users/myuser/opencv/modules/videoio/src/cap_ffmpeg.cpp:45:
/Users/myuser/opencv/modules/videoio/src/cap_ffmpeg_impl.hpp:1607:25: error: use of undeclared identifier
      'PIX_FMT_GRAY8'; did you mean 'AV_PIX_FMT_GRAY8'?
        input_pix_fmt = PIX_FMT_GRAY8;
                        ^~~~~~~~~~~~~
                        AV_PIX_FMT_GRAY8
/usr/local/Cellar/ffmpeg/3.3.4/include/libavutil/pixfmt.h:70:5: note: 'AV_PIX_FMT_GRAY8' declared here
    AV_PIX_FMT_GRAY8,     ///<        Y        ,  8bpp
    ^
In file included from /Users/myuser/opencv/modules/videoio/src/cap_ffmpeg.cpp:45:
/Users/myuser/opencv/modules/videoio/src/cap_ffmpeg_impl.hpp:1683:25: error: use of undeclared identifier
      'PIX_FMT_YUV422P'; did you mean 'AV_PIX_FMT_YUV422P'?
        codec_pix_fmt = PIX_FMT_YUV422P;
                        ^~~~~~~~~~~~~~~
                        AV_PIX_FMT_YUV422P
/usr/local/Cellar/ffmpeg/3.3.4/include/libavutil/pixfmt.h:66:5: note: 'AV_PIX_FMT_YUV422P' declared here
    AV_PIX_FMT_YUV422P,   ///< planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
    ^
fatal error: too many errors emitted, stopping now [-ferror-limit=]
20 errors generated.
make[2]: *** [modules/videoio/CMakeFiles/opencv_videoio.dir/src/cap_ffmpeg.cpp.o] Error 1
make[2]: *** Waiting for unfinished jobs....
/Users/myuser/opencv/modules/videoio/src/cap_qtkit.mm:46:9: fatal error: 'QTKit/QTKit.h' file not found
#import <QTKit/QTKit.h>
        ^
1 error generated.
make[2]: *** [modules/videoio/CMakeFiles/opencv_videoio.dir/src/cap_qtkit.mm.o] Error 1
make[1]: *** [modules/videoio/CMakeFiles/opencv_videoio.dir/all] Error 2
make: *** [all] Error 2

openCV 网站上的这个问题似乎解决了同样的问题，但没有发布解决方案：http://answers.opencv.org/question/90091/error-use-of-undeclared-identifier-avcodec_free_frame-did-you-mean-avcodec_get_name/

【问题讨论】：

  • 可以添加终端命令吗？尤其是导致该错误的那个！
  • 检查这个link out
  • 现在更新帖子@Ja_cpp。

标签： macos opencv ffmpeg


【解决方案1】：

avcodec_free_frame、PixelFormat 和 PIX_FMT_xxx 早就在 ffmpeg 中被弃用了。我很确定它们甚至不存在于 3.3.4 或当前的 master 分支中。

所以你签出的opencv版本肯定是太旧了，无法用ffmpeg 3.3.4构建，可能只兼容ffmpeg 2系列。

Opencv 在最近的提交中更新了 ffmpeg 的兼容性，例如 this。您可以看到条件宏以适应不同的 ffmpeg API，新的av_frame_free 和旧的avcodec_frame_free。

【讨论】：

  • 感谢您的回答！我在 opencv 中签出 master 分支并从那里构建它，工作得更好，我通过了我在 OP 中遇到的错误，但现在我面临这个错误：/Users/myuser/opencv_contrib/modules/optflow/src/motempl.cpp:56:47: error: no member named 'video' in namespace 'cv::ocl' ocl::Kernel k("updateMotionHistory", ocl::video::updatemotionhistory_oclsrc);
  • @bork 你更新了contrib repo吗？ master 分支中没有这样的行。
  • 清除 Cmake 缓存后解决。将其标记为答案，因为它解决了我发布的特定问题！
【解决方案2】：

从错误日志中，您似乎拥有 ffmpeg 版本 3.3.3，而您强制 cmake 查找版本 3.3.4 的标头和库。您应该清除 CMake 缓存并让它自动检测 ffmpeg。或者您可以通过brew upgrade ffmpeg 将您的 ffmpeg 升级到 3.3.4。

另外，我建议使用最新版本的 CMake GUI here。

【讨论】：

  • 我已将 ffmpeg 升级到 3.3.4，但仍然遇到相同的错误。
  • 您能否详细说明如何清除 Cmake 缓存？
  • 在您的构建文件夹中：rm -rf CMakeCache.txt CMakeFiles
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