Q1View

Q1View is a Windows Viewer and Comparer for inspecting decoded frames, raw pixel buffers, image codec output, and small visual differences that are easy to miss in a general-purpose media player.

Download the latest release | User guide | Development guide

Why Q1View?

• Inspect real pixel data. Raw YUV and RGB formats sit beside regular images, HEIF/HEIC, AVIF, and video input.
• Compare output, not impressions. Comparer places 2-4 sources together with synchronized inspection and PSNR/SSIM measurement.
• Check video timing. Viewer follows the source or selected frame rate and catches up after temporary stalls rather than drifting behind.
• Work with practical test material. Korean/Unicode paths, frame sequences, clipboard images, and linked Viewer controls are supported.

Q1View is not intended to manage photo libraries or replace a consumer video player. It is focused on codec development, imaging validation, and quick frame-level investigation.

Applications

Viewer

Open an image, raw dump, sequence, or video; zoom down to pixels, inspect coordinates and values, step through frames, or link multiple Viewer windows.

Comparer

Open two to four sources side by side and see a visual difference together with objective similarity measurements.

Download

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

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

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

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

Documentation

• User Guide: screens, workflows, menus, and shortcuts
• Development Guide: local build and release packaging
• HEIF and AVIF Support: decoder dependency details

Build

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

See the Development Guide for dependencies, packaging, and release assets.

Videos

Intro	Viewer	Comparer