具体教程在这里：

https://blog.csdn.net/qinchang1/article/details/87528245

我这里写一些注意事项和我遇到的问题。

这里需要自己新建

一个：comboBox，名字不需修改

两个按钮：pussButton。播放:displayButton。停止:stopButton。

一个label显示视频画面，这个名字也无需修改。

代码直接复制好就可以运行。

如果出错，大概率是附加依赖项配置问题。

以下为我的配置，我的opencv版本为2.4.9，需要更改成自己版本:

qtmaind.lib
Qt5Cored.lib
Qt5Guid.lib
Qt5UiToolsd.lib
Qt5Widgetsd.lib
opencv_ml249d.lib

opencv_calib3d249d.lib

opencv_contrib249d.lib

opencv_core249d.lib

opencv_features2d249d.lib

opencv_flann249d.lib

opencv_gpu249d.lib

opencv_highgui249d.lib

opencv_imgproc249d.lib

opencv_legacy249d.lib

opencv_objdetect249d.lib

opencv_ts249d.lib

opencv_video249d.lib

opencv_nonfree249d.lib

opencv_ocl249d.lib

opencv_photo249d.lib

opencv_stitching249d.lib

opencv_superres249d.lib

opencv_videostab249d.lib

opencv_objdetect249.lib

opencv_ts249.lib

opencv_video249.lib

opencv_nonfree249.lib

opencv_ocl249.lib

opencv_photo249.lib

opencv_stitching249.lib

opencv_superres249.lib

opencv_videostab249.lib

opencv_calib3d249.lib

opencv_contrib249.lib

opencv_core249.lib

opencv_features2d249.lib

opencv_flann249.lib

opencv_gpu249.lib

opencv_highgui249.lib

opencv_imgproc249.lib

opencv_legacy249.lib

opencv_ml249.lib
kernel32.lib
user32.lib
gdi32.lib
winspool.lib
comdlg32.lib
advapi32.lib
shell32.lib
ole32.lib
oleaut32.lib
uuid.lib
odbc32.lib
odbccp32.lib

 下面是我的opencv依赖项路径：