Cmake: Cmake ffmpeg library fix for Windows

CMakeLists.txt

@@ -15,12 +15,30 @@ add_library(obs-moq MODULE)
 
 if(${BUILD_PLUGIN})
   find_package(libobs REQUIRED)
-  # FFmpeg dependency
-  include(FindPkgConfig)
-  pkg_check_modules(FFMPEG REQUIRED libavcodec libavutil libswscale libswresample)
-  target_include_directories(obs-moq PRIVATE ${FFMPEG_INCLUDE_DIRS})
-  target_link_directories(obs-moq PRIVATE ${FFMPEG_LIBRARY_DIRS})
-  target_link_libraries(obs-moq PRIVATE ${FFMPEG_LIBRARIES})
+
+  if (CMAKE_HOST_LINUX)
+    # Use pkg-config to find system libraries for Linux
+    include(FindPkgConfig)
+    pkg_check_modules(FFMPEG REQUIRED libavcodec libavutil libswscale libswresample)
+    target_include_directories(obs-moq PRIVATE ${FFMPEG_INCLUDE_DIRS})
+    target_link_directories(obs-moq PRIVATE ${FFMPEG_LIBRARY_DIRS})
+    target_link_libraries(obs-moq PRIVATE ${FFMPEG_LIBRARIES})
+  else()
+    # FFmpeg dependency. Use provided pre-built dependancies
+    find_library(AVCODEC_LIB avcodec)
+    find_library(AVUTIL_LIB avutil)
+    find_library(SWSCALE_LIB swscale)
+    find_library(SWRESAMPLE_LIB swresample)
+
+    if (AVCODEC_LIB)
+      target_link_libraries(obs-moq PRIVATE ${AVCODEC_LIB} ${AVUTIL_LIB} ${SWSCALE_LIB} ${SWRESAMPLE_LIB})
+    endif()
+  endif()
+
+  # Link required windows system libraries
+  if(OS_WINDOWS)
+    target_link_libraries(obs-moq PRIVATE Userenv ntdll)
+  endif()
 else()
   find_package(FFmpeg REQUIRED avcodec avutil swscale swresample)
   target_link_libraries(obs-moq PRIVATE FFmpeg::avcodec FFmpeg::avutil FFmpeg::swscale FFmpeg::swresample)

README.md

@@ -18,11 +18,12 @@ Prerequisites:
 *   C++ Compiler (Clang/GCC/MSVC)
 *   OBS Studio development libraries (libobs)
 *   [Fork of OBS-Studio](https://github.com/brianmed/obs-studio) just to show MoQ in the UI.
+*   XCode 26.1 / macOS 15.6
 
 1.  Clone the repos:
     ```bash
     git clone https://github.com/moq-dev/obs.git moq-obs
-    git clone https://github.com/brianmed/obs-studio.git obs-studio
+    git clone --recurse-submodules  https://github.com/brianmed/obs-studio.git obs-studio
 
     # optional: for local moq development
     git clone https://github.com/moq-dev/moq.git moq
@@ -32,9 +33,21 @@ Prerequisites:
     ```bash
     cd obs-studio
 
-    # Replace with your platform
+    # Configure for Windows
+    cmake -G "Visual Studio 18 2026" -A x64 --preset windows-x64
+    # Configure for macos
     cmake --preset macos
-    cmake --build --preset macos
+
+    # Build for Windows
+    cmake --build --preset windows-x64
+
+    # Build for macOS
+    cd build_macos
+    xcodebuild  \
+     -configuration RelWithDebInfo \
+     -scheme obs-studio \
+     -parallelizeTargets \
+     -destination "generic/platform=macOS,name=Any Mac"
     ```
 
 3.  Configure the plugin:

WINDOWS.md

@@ -0,0 +1,39 @@
+## Windows Build Instructions
+
+### Build Setup
+
+```powershell
+Set-ExecutionPolicy Bypass -Scope Process -Force; [System.Net.ServicePointManager]::SecurityProtocol = [System.Net.ServicePointManager]::SecurityProtocol -bor 3072; iex ((New-Object System.Net.WebClient).DownloadString('https://community.chocolatey.org/install.ps1'))
+ choco install -y git 
+ choco install -y cmake --installargs 'ADD_CMAKE_TO_PATH=System'
+ choco install visualstudio2026buildtools --package-parameters "--add Microsoft.VisualStudio.Workload.VCTools --includeRecommended"
+ choco install rustup
+```
+
+During the rustup installation choose the `nightly` variant.
+
+Locate "Visual Studio Installer". Click "Modify". Choose "Desktop Development with C++". Check C++ ATL For x64
+
+### Build the OBS fork
+
+```powershell
+cd obs-studio
+cmake -G "Visual Studio 18 2026" -A x64 --preset windows-x64
+cmake --build --preset windows-x64
+```
+
+### Build the obs-moq plugin and install
+
+```powershell
+cd obs
+cmake -G "Visual Studio 18 2026" -A x64 --preset windows-x64 -DMOQ_LOCAL="../moq"
+cmake --build --preset windows-x64 --target install
+```
+
+
+
+## Debugging Moq Plugin
+
+```powershell
+ $env:RUST_LOG="debug"; $env:RUST_BACKTRACE=1; $env:OBS_LOG_LEVEL="debug"; Set-Location "build_x64\rundir\RelWithDebInfo\bin\64bit"; & .\obs64.exe --verbose
+```

buildspec.json

@@ -1,33 +1,33 @@
 {
     "dependencies": {
         "obs-studio": {
-            "version": "31.1.1",
+            "version": "32.1.2",
             "baseUrl": "https://github.com/obsproject/obs-studio/archive/refs/tags",
             "label": "OBS sources",
             "hashes": {
-                "macos": "39751f067bacc13d44b116c5138491b5f1391f91516d3d590d874edd21292291",
-                "windows-x64": "2c8427c10b55ac6d68008df2e9a3e82f4647aaad18f105e30d4713c2de678ccf"
+                "macos": "b4a59410cddb46d0e31df1ee13b8ec66f30862d7e980c1a8c4e3b5d16fae6053",
+                "windows-x64": "21cba22292985cf0da967d5c618999b40eaa32b73d2ab8b06154b5ea1b3d3798"
             }
         },
         "prebuilt": {
-            "version": "2025-07-11",
+            "version": "2025-08-23",
             "baseUrl": "https://github.com/obsproject/obs-deps/releases/download",
             "label": "Pre-Built obs-deps",
             "hashes": {
-                "macos": "495687e63383d1a287684b6e2e9bfe246bb8f156fe265926afb1a325af1edd2a",
-                "windows-x64": "c8c642c1070dc31ce9a0f1e4cef5bb992f4bff4882255788b5da12129e85caa7"
+                "macos": "9403bb43fb0a9bb215739a5659ca274fe884dbbbcd22bd9ca781c961fb041c42",
+                "windows-x64": "8de229cff6f1981508c0eb646b35e644633a5855787b9f5d3b90ae2aeb87ffc1"
             }
         },
         "qt6": {
-            "version": "2025-07-11",
+            "version": "2025-08-23",
             "baseUrl": "https://github.com/obsproject/obs-deps/releases/download",
             "label": "Pre-Built Qt6",
             "hashes": {
-                "macos": "d3f5f04b6ea486e032530bdf0187cbda9a54e0a49621a4c8ba984c5023998867",
-                "windows-x64": "0e76bf0555dd5382838850b748d3dcfab44a1e1058441309ab54e1a65b156d0a"
+                "macos": "990f11638b80a4509e14e8c315f6e4caa0861e37fcd3113a256fbff835ffca29",
+                "windows-x64": "c62e82483bc7c0bf199e8ac3220c66a85a6e8a0cd69a05b6d44f873b830e415f"
             },
             "debugSymbols": {
-                "windows-x64": "11b7be92cf66a273299b8f3515c07a5cfb61614b59a4e67f7fc5ecba5e2bdf21"
+                "windows-x64": "ef4954fa18c818103f63415776624fa1e403c3faaa7b0a7b259000cc35b2c9fc"
             }
         }
     },

cmake/common/buildspec_common.cmake

@@ -60,6 +60,20 @@ function(_setup_obs_studio)
     set(_cmake_generator "Xcode")
     set(_cmake_arch "-DCMAKE_OSX_ARCHITECTURES:STRING='arm64;x86_64'")
     set(_cmake_extra "-DCMAKE_OSX_DEPLOYMENT_TARGET=${CMAKE_OSX_DEPLOYMENT_TARGET}")
+
+    #Patch libobs-metal if required
+    if (_obs_version VERSION_LESS_EQUAL "32.1.2")
+
+      file(READ "${dependencies_dir}/${_obs_destination}/libobs-metal/CMakeLists.txt" CONTENTS)
+
+      #check if Swift is not available
+      if(NOT "${CONTENTS}" MATCHES "enable_language\\(Swift\\)")
+        string(REGEX REPLACE "cmake_minimum_required\\(VERSION 3.28...3.30\\)" "cmake_minimum_required(VERSION 3.28...3.30)\nenable_language(Swift)" NEW_CONTENTS "${CONTENTS}")
+        message(STATUS "Patching libobs-metal")
+        file(WRITE "${dependencies_dir}/${_obs_destination}/libobs-metal/CMakeLists.txt" "${NEW_CONTENTS}")
+      endif()
+
+    endif()
   endif()
 
   message(STATUS "Configure ${label} (${arch})")

cmake/macos/compilerconfig.cmake

@@ -16,8 +16,8 @@ add_compile_options("$<$<NOT:$<COMPILE_LANGUAGE:Swift>>:-fopenmp-simd>")
 
 # Ensure recent enough Xcode and platform SDK
 function(check_sdk_requirements)
-  set(obs_macos_minimum_sdk 15.0) # Keep in sync with Xcode
-  set(obs_macos_minimum_xcode 16.0) # Keep in sync with SDK
+  set(obs_macos_minimum_sdk 26.5) # Keep in sync with Xcode
+  set(obs_macos_minimum_xcode 26.5) # Keep in sync with SDK
   execute_process(
     COMMAND xcrun --sdk macosx --show-sdk-platform-version
     OUTPUT_VARIABLE obs_macos_current_sdk

cmake/windows/defaults.cmake

@@ -8,9 +8,10 @@ set(CMAKE_FIND_PACKAGE_TARGETS_GLOBAL TRUE)
 include(buildspec)
 
 if(CMAKE_INSTALL_PREFIX_INITIALIZED_TO_DEFAULT)
+  cmake_path(SET ALLUSERSPROFILE_PATH $ENV{ALLUSERSPROFILE})
   set(
     CMAKE_INSTALL_PREFIX
-    "$ENV{ALLUSERSPROFILE}/obs-studio/plugins"
+    "${ALLUSERSPROFILE_PATH}/obs-studio/plugins"
     CACHE STRING
     "Default plugin installation directory"
     FORCE

justfile

@@ -30,7 +30,7 @@ build preset="":
 	set -euo pipefail
 
 	PRESET=$(just preset "{{preset}}")
-	cmake --build --preset "$PRESET"
+	cmake --build --preset "$PRESET" --target install
 
 # Run a local fork of OBS Studio with the plugin loaded
 # TODO support for other platforms

src/obs-moq.cpp

@@ -26,6 +26,11 @@ extern "C" {
 #include "moq.h"
 }
 
+#ifdef _WIN64
+	#include <windows.h>
+	#include <cstring>
+#endif
+
 OBS_DECLARE_MODULE()
 OBS_MODULE_USE_DEFAULT_LOCALE("obs-moq", "en-US")
 MODULE_EXPORT const char *obs_module_description(void)
@@ -39,6 +44,13 @@ bool obs_module_load(void)
 	// The second argument is the string length of the first argument.
 	moq_log_level("info", 4);
 
+	// Enable a debug console in Windows if the RUST_LOG env var is set to debug.
+	#ifdef _WIN64
+		const char* logLevel = std::getenv("RUST_LOG");
+		if (logLevel && strcmp(logLevel, "debug") == 0)
+			AllocConsole();
+	#endif
+
 	register_moq_output();
 	register_moq_service();
 	register_moq_source();