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截止到2025年5月份的obs最新版本是obs 31.0.3，最近又需要用到它，编译起来跟过去方法差别比较大。
一开始尝试用visual studio 2019版本编译，有900多个错误，全都是依赖库的编译错误。从网上查到这些依赖库现在都是基于visual sutio 2022编译的，要想用vs2019编译obs项目，需要将这些依赖库全都用vs2019重新编译过，太麻烦啦。还是用官方推荐的visual studio 2022来编译。只遇到一个困惑让人无从下手的问题。

1.1 下载源码
git clone --recursive https://github.com/obsproject/obs-studio.git

cd obs-studio 
git submodule update --init --recursive  
git checkout --track origin/release/31.0

1.2 安装依赖
安装PowerShell 7.5.1，以管理员身份运行powershell
找到Build-Windows.ps1 文件所在目录
obs-studio\.github\scripts\Build-Windows.ps1
cd 到Build-Windows.ps1 文件所在目录
执行./Build-Windows.ps1
【报错：
  throw "Build-Windows.ps1 requires CI environment"
     |      ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     | Build-Windows.ps1 requires CI environment
】     
PS D:\develop\obs-studio\.github\scripts> Set-ExecutionPolicy Unrestricted
PS D:\develop\obs-studio\.github\scripts> Get-ExecutionPolicy

只需在命令行执行$env:CI = "true"
PS D:\develop\obs-studio\.github\scripts> $env:CI = "true"
PS D:\develop\obs-studio\.github\scripts> .\Build-Windows.ps1

PS D:\develop\obs-studio\.github\scripts> Set-ExecutionPolicy Unrestricted
PS D:\develop\obs-studio\.github\scripts> .\Build-Windows.ps1
Exception: D:\develop\obs-studio\.github\scripts\Build-Windows.ps1:17
Line |
  17 |      throw "Build-Windows.ps1 requires CI environment"
     |      ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     | Build-Windows.ps1 requires CI environment
PS D:\develop\obs-studio\.github\scripts> Get-ExecutionPolicy
Unrestricted
PS D:\develop\obs-studio\.github\scripts> .\Build-Windows.ps1
Exception: D:\develop\obs-studio\.github\scripts\Build-Windows.ps1:17
Line |
  17 |      throw "Build-Windows.ps1 requires CI environment"
     |      ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
     | Build-Windows.ps1 requires CI environment
PS D:\develop\obs-studio\.github\scripts> $env:CI = "true"     #之前不清楚需要设置，一直报错
PS D:\develop\obs-studio\.github\scripts> .\Build-Windows.ps1   #到这里就能执行成功啦

powershell执行.\Build-Windows.ps1，生成的项目在这两个新建的目录下
obs-studio/build_x64/
obs-studio/build_x86/

1.3 配置编译工程
不需要再用cmake来生成.sln项目文件
直接用visual studio 2022打开obs-studio/build_x64/obs-studio.sln
编译x64的debug或release都能编译过，
打开obs的【设置】->【直播】，自定义rtmp推流地址，开始直播，即推流成功。

1.4 windows系统打包工具可以用Inno Setup Compiler
  不做赘述