【学习笔记】obs-studio 编译

1.下载源码

因为现在最新的obs-studio 只支持VS2019了，我没安装VS2019，安装的是VS2015，查看wiki记录

https://github.com/obsproject/obs-studio/wiki/Install-Instructions/0ddc3265c810eec18238dcc996856558c6f88bb7

为最后一版说明，支持VS2015的

通过时间比对，对应的是obs-studio 24.0

2.编译环境软件需求

obs-studio在WIndows平台编译使用的是CMake，具体的内容在Wiki中也有说明：
Requirements for building OBS on windows
Development packages of FFmpeg, x264, and cURL.

• Pre-built windows dependencies for VS2015 and VS2017 can be found here 如下是VS2015和VS2017的预编译依赖库:
  • VS2015: https://obsproject.com/downloads/dependencies2015.zip
  • VS2017: https://obsproject.com/downloads/dependencies2017.zip
• Qt5 (minimum version of 5.9 if you're using VS2017)（如果使用VS2017 Qt最少是5.9）
• cmake 的windows版本
• Visual Studio 2015 or Visual Studio 2017 (latest updates recommended) 推荐使用 vs205或者vs2017

3.编译

• Run cmake-gui, and set the following fields:
  • In "where is the source code", enter in the repo directory (example: D:/obs).
  • In "where to build the binaries", enter the repo directory path with the 'build' subdirectory (example: D:/obs/build).
  • 就是配置下图的路径
    
• Set the following variables in cmake-gui (alternatively, you can set them as Windows Environment Variables):
  • DepsPath (Path to the include for all dependencies, not including Qt.).
    • An example path if you extracted the dependancies .zip to c:obs-deps would be:
      • c:obs-depswin32include
      • c:obs-depswin64include
  • If you wish to specify both 32 and 64 bit dependencies (for multi-arch building), you can use DepsPath32 and DepsPath64 to their respective include folders.
  • 配置下cmke中的变量DepsPath，根据自己的路径调整，如D:/obs-studio-24.0.0/dependencies2015/win32/include，要编译32位的就选win32，编译64的就选win64，想2种都编译就增加DepsPath32和DepsPath64
    
• QTDIR (Path to Qt build base directory. GUI is built by default. Set the cmake boolean variable DISABLE_UI to TRUE if you don't want the GUI and this is no longer required. Can be optionally suffixed with 32 or 64 to specify target arch).
  • NOTE: Make sure to download Qt 5.X.X prebuilt components for your version of MSVC (64 or 32 bit).
  • Example Qt directories you would use here if you installed Qt5 to D:Qt would usually look something like this:
    • (32bit) QTDIR=D:Qt5.8msvc2017
    • (64bit) QTDIR64=D:Qt5.8msvc2017_64
  • 配置下cmke中的变量QTDIR，我用的是Qt5.9.8
    
• 点 Cmake 程序 界面的Configure，选择 Visual Studio 14 2015
• 点 Generate，生成VS工程

4.生成结果

成功36个，失败2个

切换到错误列表

• KSAUDIO_SPEAKER_2POINT1这个宏，定义在其他文件中，复制过来到严重性win-wasapi.cpp 文件中即可#define KSAUDIO_SPEAKER_2POINT1 (KSAUDIO_SPEAKER_STEREO|SPEAKER_LOW_FREQUENCY)
• obs-studio-24.0.0UIwindow-basic-preview.cpp(930): error C2719: “transform”: 要求 16 对齐的形参将不被对齐 ，将
  static bool IntersectBox(matrix4 transform, float x1, float x2, float y1,
  float y2)
  函数修改为
  static bool IntersectBox(matrix4& transform, float x1, float x2, float y1,
  float y2)

重新编译

5.接下来研究下这个是什么，怎么实现的

6.

大致看了下，是D3D实现的或者openGL，这2个我都没接触过，还要先学习这个，这个效果应该叫多窗口叠加。