Question

我正在尝试将libmediainfo用于我的qt5项目，并收到以下错误

Undefined symbols for architecture x86_64:
  "MediaInfoLib::MediaInfo::Open(std::basic_string<wchar_t, std::char_traits<wchar_t>, std::allocator<wchar_t> > const&)", referenced from:
      MainWindow::on_dupeslistWidget_itemClicked(QListWidgetItem*) in mainwindow.o
  "MediaInfoLib::MediaInfo::Option(std::basic_string<wchar_t, std::char_traits<wchar_t>, std::allocator<wchar_t> > const&, std::basic_string<wchar_t, std::char_traits<wchar_t>, std::allocator<wchar_t> > const&)", referenced from:
      MainWindow::on_dupeslistWidget_itemClicked(QListWidgetItem*) in mainwindow.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
make: *** [VideoTwin.app/Contents/MacOS/VideoTwin] Error 1
19:56:12: The process "/usr/bin/make" exited with code 2.
Error while building/deploying project VideoTwin (kit: default)
When executing step "Make"

我的.pro文件

QT       += core gui
QT += sql
QT += concurrent
QT += multimedia multimediawidgets

INCLUDEPATH += /usr/local/include /usr/local/Cellar/opencv3/3.1.0_1/include/ $$[QT_INSTALL_PREFIX]/src/3rdparty/sqlite
LIBS += -L/usr/local/Cellar/opencv3/3.1.0_1/lib -L/usr/local/lib -lmediainfo -lzen -lz -lpthread -lopencv_stitching -lopencv_superres -lopencv_videostab -lopencv_aruco -lopencv_bgsegm -lopencv_bioinspired -lopencv_ccalib -lopencv_cvv -lopencv_dnn -lopencv_dpm -lopencv_fuzzy -lopencv_line_descriptor -lopencv_optflow -lopencv_plot -lopencv_reg -lopencv_saliency -lopencv_stereo -lopencv_structured_light -lopencv_rgbd -lopencv_surface_matching -lopencv_tracking -lopencv_datasets -lopencv_text -lopencv_face -lopencv_xfeatures2d -lopencv_shape -lopencv_video -lopencv_ximgproc -lopencv_calib3d -lopencv_features2d -lopencv_flann -lopencv_xobjdetect -lopencv_objdetect -lopencv_ml -lopencv_xphoto -lopencv_highgui -lopencv_videoio -lopencv_imgcodecs -lopencv_photo -lopencv_imgproc -lopencv_core

QMAKE_CXXFLAGS += -D_UNICODE -DUNICODE
QMAKE_CFLAGS += -D_UNICODE -DUNICODE

greaterThan(QT_MAJOR_VERSION, 4): QT += widgets

TARGET = VideoTwin
TEMPLATE = app


SOURCES += main.cpp\
        mainwindow.cpp \
    preferencsedialog.cpp \
    myqlistwidget.cpp \
    $$[QT_INSTALL_PREFIX]/src/3rdparty/sqlite/sqlite3.c \
    matchpair.cpp

HEADERS  += mainwindow.h \
    preferencsedialog.h \
    myqlistwidget.h \
    matchpair.h

FORMS    += mainwindow.ui \
    preferencsedialog.ui

RESOURCES += \
    resources.qrc

在我的标题文件中

#include <MediaInfo/MediaInfo.h>

和cpp的相关部分

MediaInfoLib::MediaInfo media_info;
media_info.Option(L"Internet",L"No");
media_info.Open(item->data(Qt::UserRole + FilepathRole).toString().toStdWString());
QString temp = QString::fromWCharArray( media_info.Inform().c_str(),media_info.Inform().length());
ui->video_info->setText(temp);
ui->video_info->show();

我不确定问题出在哪里。我在/ usr / local / lib目录中有libmediaplayer.dylib。请帮忙

Answer 1

你不是说Qt在哪里是libmediainfo.dylib，所以Qt doe找不到它。

您需要将其添加到.pro文件中，例如：

LIBS += $$system(pkg-config --libs libmediainfo)

您可以拥有more examples about how to configure your .pro file in order to link to libmediainfo.dylib，具体取决于系统中libmediainfo.dylib的位置。

libmediainfo：qt5项目未定义的符号错误

1 个答案: