Aven

[播放url规则](https://github.com/zlmediakit/ZLMediaKit/wiki/%E6%92%AD%E6%94%BEurl%E8%A7%84%E5%88%99) 绝大部分问题的答案都在WIKI中，如果刚接触ZLM建议通读一遍WIKI起码有个印象

@grinay you might need pass these options to cmake when building OpenCv library. ``` -DBUILD_PNG=ON -DWITH_PNG=ON ```

> I have some C++ code from someone else: > > ``` > cv::FileStorage df(FeaturesXMLPath.toStdString(), cv::FileStorage::WRITE); > std::vector contour; > ... > df

It suggests that you've set wrong library path.