shensunbo Blog

「离开世界之前一切都是过程」

c++

unique_lock: 在作用域结束时自动解锁定义了一个有返回值的函数，但实际函数结尾没有返回，可能会导致程序崩溃 :-( *** stack smashing detected ***: RtvSvmServiceServer terminated 对于外部获取的数组，使用.at()访问而不是[]，因为.at()会抛出异常，如果性能不是要求特别高的话

Posted by shensunbo on April 1, 2024

检查表

类检查表是否需要构造函数成员是否私有是否需要无参构造函数是否每个构造函数初始化所有数据成员是否需要析构函数是否需要虚析构函数，基类需要虚析构函数，否则使用基类指针指向子类，析构可能出错是否需要复制构造函数，禁止复制需要将复制构造函数声明为私有删除数组时使用delete [] 复制构造函数和赋值构造函数参数加const 引用是否要为co...

Posted by shensunbo on March 25, 2024

Linux上遇到的奇怪问题

问题：./DmsApp: error while loading shared libraries: libMNN.so: cannot open shared object file: No such file or directory 解决办法：sudo ldconfig 原因：安装和更新了共享库后，需要更新共享库缓存 wsl2...

Posted by shensunbo on March 15, 2024

WSL2数据迁移

WSL2的ubuntu默认安装在C盘，占用空间较大，介绍如何将数据迁移到其他盘，主要方法就是建立一个软链接一般安装路径 C:\Users\vfvaf0\AppData\Local\Packages\CanonicalGroupLimited.Ubuntu18.04onWindows_79rhkp1fndgsc\LocalState\ext4.vhdx 将 ext4.vhdx ...

Posted by shensunbo on March 12, 2024

camke 入门

basic 初始目录，使用两个静态库 1 2 3 4 5 6 7 8 ├── include │ ├── byeworld.h │ └── helloworld.h ├── lib │ ├── libbyeworld.a │ └── libhelloworld.a └── src └── main.cpp 根目录下创建一个CMakeLis...

Posted by shensunbo on March 12, 2024

人生七年

每隔几年应该重新看一次应该保证拥有给孩子提供好的教育条件的资本

Posted by shensunbo on March 10, 2024

英语学习-口语场景

meeting when don`t understand someone I'm sorry to interrupt, Excuse me, Sorry to interrupt, I'm sorry, could you please repeat that?" "Pardon me, could you say that again?" "I didn't catch tha...

Posted by shensunbo on February 27, 2024

英语学习-口语语法

介词 Prepositions help to clarify the position, direction, time, or relationship of the noun/pronoun to other parts of the sentence. e.g. 1 2 3 4 5 6 7 8 She is sitting on the chair. The boo...

Posted by shensunbo on February 27, 2024

如何使用ffmpeg filter API

Posted by shensunbo on February 26, 2024

ffmpeg 命令

ffmpeg yuv格式转换 ffmpeg -s 1920x1536 -pix_fmt uyvy422 -i c.raw -pix_fmt yuv420p c2.yuv yuv修改分辨率 ffmpeg -s 1920x1536 -pix_fmt nv12 -i d.raw -vf "scale=1080:720:flags=bicubic" -sws_flags bicubic -pix...

Posted by shensunbo on February 26, 2024