Windows installer

[yunowo]

Description

Requires GStreamer 1.28.2+.
Builds an offline installer with all dependencies bundled.

Fixes # (issue)

Any Newly Introduced Dependencies

NSIS: zlib/libpng license (https://nsis.sourceforge.io/License)

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce. Please also list any relevant details for your test configuration

Checklist:

• I agree to use the MIT license for my code changes.
• I have not introduced any 3rd party components incompatible with MIT.
• I have not included any company confidential information, trade secret, password or security token.
• I have performed a self-review of my code.

[mholowni]

I am no familiar with creating windows installers, but my only concern is the license of installer logo. From where did you get it?

[yunowo]

I am no familiar with creating windows installers, but my only concern is the license of installer logo. From where did you get it?

It's a placeholder and from Chrome's installer, but obviously they took it from windows. Removed and let's see if we can get a new logo to use.

[Copilot]

Pull request overview

Adds Windows installer generation (NSIS via CPack), including automatic download/bundling of required third-party installers and CI wiring for packaging.

Changes:

• Add Windows CPack/NSIS packaging configuration and componentized install rules.
• Add NSIS script/template and helper macros for dependency install, env-var setup, and uninstall behaviors.
• Update PowerShell build script and Windows CI workflow to install NSIS and run packaging targets.

Reviewed changes

Copilot reviewed 9 out of 9 changed files in this pull request and generated 7 comments.

Show a summary per file

File	Description
scripts/build_dlstreamer_dlls.ps1	Installs NSIS + plugins, switches build dir to repo, and adds packaging steps/flags.
LICENSE	Updates copyright year range to 2018–2026.
CMakeLists.txt	Includes Windows packaging configuration on WIN32 builds.
cmake/packaging/windows/NSIS.template.in	Custom CPack NSIS template enabling extra hooks/defines for DL Streamer installer.
cmake/packaging/windows/install_targets.cmake	Defines component install rules and custom target to download installer dependencies.
cmake/packaging/windows/download_deps.cmake	Adds CMake script to download/verify GStreamer & Python installers.
cmake/packaging/windows/dlstreamer.nsh	Implements installer logic (dependency checks, env vars, cleanup, hash verification, uninstall UI).
cmake/packaging/windows/cpack_windows.cmake	Configures CPack NSIS generator, versions/hashes, signing hooks, and packaging targets.
.github/workflows/dls-build-and-test-windows.yaml	Updates build output directory and sets NSIS_SKIP_COMPRESSION for CI builds.

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[yangjianfeng1208]

I see the first step of the installer is compiling the source code.
I was wondering if it would be possible to change this to directly download the latest DLLs from GitHub release?
After all, the people performing local builds are typically developers, and they generally don't need to install everything from scratch.

[yunowo]

I see the first step of the installer is compiling the source code. I was wondering if it would be possible to change this to directly download the latest DLLs from GitHub release? After all, the people performing local builds are typically developers, and they generally don't need to install everything from scratch.

The build_dlstreamer_dlls.ps1 is not the installer. It generates an exe installer which will be released on GitHub. There will be no more DLL-only releases in the future.
The exe is self contained with all dependencies. No internet is needed to install the installer.