Qt qgraphicsvideoitem编译器错误

我正在尝试用QMediaPlayer播放视频。目前，我正在使用QT主页上的示例：

当我试图编译此代码时，出现以下错误：

C:\Users\Philipp\Desktop\CarPC_Terminal\mainwindow.cpp:220: Fehler:undefined reference to `_imp___ZN18QGraphicsVideoItemC1EP13QGraphicsItem'

谁能告诉我该怎么解决这个问题吗

我的建议包括：

#include <QMainWindow>
#include <QtMultimedia>
#include <QtMultimediaWidgets/QVideoWidget>
#include <QtMultimediaWidgets/QGraphicsVideoItem>
#include <QtWidgets/QGraphicsItem>
#include <QGraphicsView>

---

您是否在.pro文件中添加了QT+=multimedia？和QT+=multimediawidgets。是的，很好。多媒体小部件丢失了。但现在我得到了图像视图->场景->添加项的SIGSEGV分割错误；在调试器下运行它，并在此处粘贴回溯。您的graphicsView是否设置了场景？

#include <QMainWindow>
#include <QtMultimedia>
#include <QtMultimediaWidgets/QVideoWidget>
#include <QtMultimediaWidgets/QGraphicsVideoItem>
#include <QtWidgets/QGraphicsItem>
#include <QGraphicsView>

Debuggen beginnt
Temporarily disabling breakpoints for unloaded shared library "C:\Qt\Qt5.1.0\5.1.0\mingw48_32\plugins\platforms\qminimald.dll"
Temporarily disabling breakpoints for unloaded shared library "C:\Qt\Qt5.1.0\5.1.0\mingw48_32\plugins\platforms\qoffscreend.dll"
Temporarily disabling breakpoints for unloaded shared library "C:\Qt\Qt5.1.0\5.1.0\mingw48_32\plugins\platforms\qwindowsd.dll"
Temporarily disabling breakpoints for unloaded shared library "C:\Qt\Qt5.1.0\5.1.0\mingw48_32\plugins\mediaservice\dsengined.dll"
Temporarily disabling breakpoints for unloaded shared library "C:\Qt\Qt5.1.0\5.1.0\mingw48_32\plugins\mediaservice\qtmedia_audioengined.dll"
Temporarily disabling breakpoints for unloaded shared library "C:\Qt\Qt5.1.0\5.1.0\mingw48_32\plugins\accessible\qtaccessiblequickd.dll"
Temporarily disabling breakpoints for unloaded shared library "C:\Qt\Qt5.1.0\5.1.0\mingw48_32\plugins\accessible\qtaccessiblewidgetsd.dll"
(Internal error: pc 0x4 in read in psymtab, but not in symtab.)
(Internal error: pc 0x4 in read in psymtab, but not in symtab.)