c++ - 在 Mac 上使用 FFMPEG 而不是 Quicktime 编译 OpenCV

Question

我正在开发一些可以在 Linux 上使用 OpenCV 和 FFMPEG 运行的代码。我想使用我的 Mac 来开发此代码，并且我需要 Mac 上的 FFMPEG 功能。

我已经能够像这样运行配置:

./configure --without-quicktime --with-ffmpeg --without-python --disable-apps CPPFLAGS=-I/opt/local/include LDFLAGS="-L/opt/local/lib -L/usr/local/share -L/usr/local/lib"

但是当我运行 make 时出现此错误:

Extracting /Users/adamb/opencv/trunk/opencv/src/./.libs/lib_cxcore.a
(cd .libs/libcxcore.lax/lib_cxcore.a && ar x /Users/adamb/opencv/trunk/opencv/src/./.libs/lib_cxcore.a)
g++ -dynamiclib -single_module  -o .libs/libcxcore.2.dylib  .libs/dummy.o  .libs/libcxcore.lax/lib_cxcore.a/cxalloc.o .libs/libcxcore.lax/lib_cxcore.a/cxarithm.o .libs/libcxcore.lax/lib_cxcore.a/cxarray.o .libs/libcxcore.lax/lib_cxcore.a/cxcmp.o .libs/libcxcore.lax/lib_cxcore.a/cxconvert.o .libs/libcxcore.lax/lib_cxcore.a/cxcopy.o .libs/libcxcore.lax/lib_cxcore.a/cxdatastructs.o .libs/libcxcore.lax/lib_cxcore.a/cxdrawing.o .libs/libcxcore.lax/lib_cxcore.a/cxdxt.o .libs/libcxcore.lax/lib_cxcore.a/cxerror.o .libs/libcxcore.lax/lib_cxcore.a/cximage.o .libs/libcxcore.lax/lib_cxcore.a/cxlapack.o .libs/libcxcore.lax/lib_cxcore.a/cxlogic.o .libs/libcxcore.lax/lib_cxcore.a/cxlut.o .libs/libcxcore.lax/lib_cxcore.a/cxmathfuncs.o .libs/libcxcore.lax/lib_cxcore.a/cxmatmul.o .libs/libcxcore.lax/lib_cxcore.a/cxmatrix.o .libs/libcxcore.lax/lib_cxcore.a/cxmean.o .libs/libcxcore.lax/lib_cxcore.a/cxmeansdv.o .libs/libcxcore.lax/lib_cxcore.a/cxminmaxloc.o .libs/libcxcore.lax/lib_cxcore.a/cxnorm.o .libs/libcxcore.lax/lib_cxcore.a/cxouttext.o .libs/libcxcore.lax/lib_cxcore.a/cxpersistence.o .libs/libcxcore.lax/lib_cxcore.a/cxrand.o .libs/libcxcore.lax/lib_cxcore.a/cxsumpixels.o .libs/libcxcore.lax/lib_cxcore.a/cxsvd.o .libs/libcxcore.lax/lib_cxcore.a/cxswitcher.o .libs/libcxcore.lax/lib_cxcore.a/cxtables.o .libs/libcxcore.lax/lib_cxcore.a/cxutils.o   -L/opt/local/lib -L/usr/local/share -L/usr/local/lib -lavformat -lavcodec -lpthread -ldl -lm  -march=prescott -msse -install_name  /usr/local/lib/libcxcore.2.dylib -Wl,-compatibility_version -Wl,3 -Wl,-current_version -Wl,3.0
    Undefined symbols:
      "_dgesdd_", referenced from:
      _cvSVD in cxsvd.o
      _cvSVD in cxsvd.o
  "_sgelsd_", referenced from:
      _cvSolve in cxlapack.o
      _cvSolve in cxlapack.o
  "_ssyevr_", referenced from:
      _cvEigenVV in cxlapack.o
      _cvEigenVV in cxlapack.o
  "_dgetrf_", referenced from:
      _cvDet in cxlapack.o
      _cvInvert in cxlapack.o
  "_dgetri_", referenced from:
      _cvInvert in cxlapack.o
      _cvInvert in cxlapack.o
  "_sgesdd_", referenced from:
      _cvSVD in cxsvd.o
      _cvSVD in cxsvd.o
  "_dgels_", referenced from:
      _cvSolve in cxlapack.o
      _cvSolve in cxlapack.o
  "_dgesv_", referenced from:
      _cvSolve in cxlapack.o
  "_sgetrf_", referenced from:
      _cvDet in cxlapack.o
      _cvInvert in cxlapack.o
  "_sgetri_", referenced from:
      _cvInvert in cxlapack.o
      _cvInvert in cxlapack.o
  "_dpotrf_", referenced from:
      _cvInvert in cxlapack.o
      _cvSolve in cxlapack.o
  "_dpotri_", referenced from:
      _cvInvert in cxlapack.o
  "_dpotrs_", referenced from:
      _cvSolve in cxlapack.o
  "_sgels_", referenced from:
      _cvSolve in cxlapack.o
      _cvSolve in cxlapack.o
  "_spotrf_", referenced from:
      _cvInvert in cxlapack.o
      _cvSolve in cxlapack.o
  "_spotri_", referenced from:
      _cvInvert in cxlapack.o
  "_sgesv_", referenced from:
      _cvSolve in cxlapack.o
  "_spotrs_", referenced from:
      _cvSolve in cxlapack.o
  "_dgelsd_", referenced from:
      _cvSolve in cxlapack.o
      _cvSolve in cxlapack.o
  "_dsyevr_", referenced from:
      _cvEigenVV in cxlapack.o
      _cvEigenVV in cxlapack.o
ld: symbol(s) not found
collect2: ld returned 1 exit status
make[2]: *** [libcxcore.la] Error 1
make[1]: *** [all-recursive] Error 1
make: *** [all] Error 2

我尝试使用较新版本的 OpenCV 1.1pre1，但出现类似的错误，但符号不同。我使用与上面相同的 ./configure。

Extracting /Users/adamb/Downloads/opencv-1.1.0/otherlibs/highgui/./.libs/lib_highgui.a
(cd .libs/libhighgui.lax/lib_highgui.a && ar x /Users/adamb/Downloads/opencv-1.1.0/otherlibs/highgui/./.libs/lib_highgui.a)
g++ -dynamiclib  -o .libs/libhighgui.2.0.0.dylib  .libs/dummy.o  .libs/libhighgui.lax/lib_highgui.a/bitstrm.o .libs/libhighgui.lax/lib_highgui.a/cvcap.o .libs/libhighgui.lax/lib_highgui.a/cvcap_ffmpeg.o .libs/libhighgui.lax/lib_highgui.a/cvcap_images.o .libs/libhighgui.lax/lib_highgui.a/grfmt_base.o .libs/libhighgui.lax/lib_highgui.a/grfmt_bmp.o .libs/libhighgui.lax/lib_highgui.a/grfmt_exr.o .libs/libhighgui.lax/lib_highgui.a/grfmt_imageio.o .libs/libhighgui.lax/lib_highgui.a/grfmt_jpeg.o .libs/libhighgui.lax/lib_highgui.a/grfmt_jpeg2000.o .libs/libhighgui.lax/lib_highgui.a/grfmt_png.o .libs/libhighgui.lax/lib_highgui.a/grfmt_pxm.o .libs/libhighgui.lax/lib_highgui.a/grfmt_sunras.o .libs/libhighgui.lax/lib_highgui.a/grfmt_tiff.o .libs/libhighgui.lax/lib_highgui.a/image.o .libs/libhighgui.lax/lib_highgui.a/loadsave.o .libs/libhighgui.lax/lib_highgui.a/precomp.o .libs/libhighgui.lax/lib_highgui.a/utils.o .libs/libhighgui.lax/lib_highgui.a/window.o .libs/libhighgui.lax/lib_highgui.a/window_carbon.o   -L/opt/local/lib -L/usr/local/share -L/usr/local/lib ../../cxcore/src/.libs/libcxcore.dylib /opt/local/lib/libavformat.dylib /opt/local/lib/libavcodec.dylib ../../cv/src/.libs/libcv.dylib /Users/adamb/Downloads/opencv-1.1.0/cxcore/src/.libs/libcxcore.dylib /opt/local/lib/libjasper.dylib /opt/local/lib/libjpeg.dylib -lavformat -lavcodec -lpthread -ldl -lm  -march=prescott -msse2 -framework ApplicationServices -Wl,-framework -Wl,Carbon -install_name  /usr/local/lib/libhighgui.2.dylib -compatibility_version 3 -current_version 3.0 -Wl,-single_module
Undefined symbols:
  "_av_rescale_q", referenced from:
      icv_av_write_frame_FFMPEG(AVFormatContext*, AVStream*, unsigned char*, unsigned int, AVFrame*)in cvcap_ffmpeg.o
  "_img_convert", referenced from:
      CvCapture_FFMPEG::retrieveFrame()       in cvcap_ffmpeg.o
      CvVideoWriter_FFMPEG::writeFrame(_IplImage const*)  in cvcap_ffmpeg.o
  "_av_free", referenced from:
      icv_alloc_picture_FFMPEG(int, int, int, bool)in cvcap_ffmpeg.o
      CvVideoWriter_FFMPEG::close()      in cvcap_ffmpeg.o
      CvVideoWriter_FFMPEG::close()      in cvcap_ffmpeg.o
      CvVideoWriter_FFMPEG::close()      in cvcap_ffmpeg.o
      CvVideoWriter_FFMPEG::close()      in cvcap_ffmpeg.o
      CvCapture_FFMPEG::close()      in cvcap_ffmpeg.o
  "_av_freep", referenced from:
      CvVideoWriter_FFMPEG::close()      in cvcap_ffmpeg.o
      CvVideoWriter_FFMPEG::close()      in cvcap_ffmpeg.o
  "_av_malloc", referenced from:
      CvVideoWriter_FFMPEG::open(char const*, int, double, CvSize, bool)in cvcap_ffmpeg.o
  "_av_sub_q", referenced from:
      CvVideoWriter_FFMPEG::open(char const*, int, double, CvSize, bool)in cvcap_ffmpeg.o
ld: symbol(s) not found

如果我添加 --enable-shared=no 并且 OpenCV 将编译，但我的程序将无法运行...

关于如何使用默认的 --enable-shared 编译其中任何一个，有什么建议吗？

Answer 1

您的链接行缺少 -lavutil -lavcodec。