Q1View

Q1View is a Windows viewer and comparer for people who inspect pixels, decoded frames, raw buffers, and codec output.

Download

Get the latest Windows x64 build from the GitHub Releases page.

• Installer: Q1ViewSetup-x64.exe
• Portable package: Q1View-windows-x64.zip

The installer adds separate Start Menu entries for Q1View Viewer and Q1View Comparer.

What You Get

• Viewer opens images, raw dumps, image sequences, videos, and clipboard images with pixel-level inspection.
• Comparer compares 2-4 sources with synchronized navigation, zooming, color-space handling, PSNR, and SSIM.

Why Q1View?

• Raw pixel formats are first-class: YUV, NV12/NV21, P010/P210, RGB/BGR/RGBA, grayscale, packed RGB, and more.
• Image folders can be treated like frame sequences.
• Video playback follows the source or selected frame rate and catches up after temporary stalls.
• Exact pixel values, coordinates, luma-only view, nearest-neighbor zoom, and selected-region copy are built into the workflow.
• Multiple Viewer windows can link input controls for synchronized inspection.
• HEIF/HEIC/HIF and AVIF still images are supported in both Viewer and Comparer.
• Unicode Windows paths are supported, including Korean file and folder names.
• The release package includes the DLLs it needs, so users do not need to install OpenCV or HEIF libraries separately.

Q1View is not trying to be a photo library. It is built for Windows pixel debugging, frame comparison, and quick visual checks during codec or image pipeline work.

Supported Inputs

• BMP, JPEG, PNG, TIFF, WebP
• HEIF, HEIC, HIF
• AVIF / AV1 still images
• Video files supported by the packaged OpenCV/FFmpeg runtime
• Raw frame dumps and clipboard images

Build From Source

Q1View builds with Visual Studio 2019 or newer on Windows x64.

msbuild Viewer\Viewer.sln /m /restore /p:Configuration=Release /p:Platform=x64
msbuild Comparer\Comparer.sln /m /restore /p:Configuration=Release /p:Platform=x64

Normal builds restore OpenCV and libheif into .deps from published dependency archives. Dedicated GitHub Actions workflows refresh those dependency archives when needed.

Release Pipeline

GitHub Actions builds Viewer and Comparer, stages the runtime files, creates the portable zip, builds the Inno Setup installer, and publishes release assets for version tags such as v1.0.9.

The pipeline also supports Authenticode signing when signing credentials are configured through repository secrets.

Project Layout

Path	Purpose
Viewer\	Single-source viewer application
Comparer\	Multi-pane frame comparison application
QVisionCore\	Image loading, raw color conversion, HEIF/AVIF fallback, metrics
build\	Packaging, signing, and dependency helper scripts
installer\	Inno Setup installer definition
docs\	Focused technical notes

Videos

Intro	Viewer	Comparer

More videos:

• Viewer 2
• Source code