VideoMelius is a Mac desktop app built for precise, side-by-side video quality comparison. Load two video files, hit play, and both run in perfect synchronization. Zoom in and pan across both screens simultaneously to inspect compression artifacts, color grading differences, encoding quality, and more — at the pixel level. For video editors, encoding engineers, QC specialists, colorists, and anyone who refuses to compromise on video quality.
Play, pause, and seek two videos simultaneously with perfect synchronization. Every control affects both videos at exactly the same moment.
The zoom slider and drag gesture apply to both videos at once, keeping both frames in perfect alignment as you inspect specific areas in detail.
Familiar play/pause, fast-forward, and rewind buttons alongside a precision seek slider with time indicators let you jump quickly to any frame for comparison.
Click the Select Video buttons to open files from a dialog, or drag and drop video files directly onto either side of the window — ready to compare in seconds.
Every playback action — play, pause, seek — applies to both videos simultaneously. When you scrub to a specific timecode on one side, the other jumps there too. No more manually lining up two windows or trying to pause at the exact right frame. The sync is automatic, precise, and completely reliable.
Use the zoom slider at the bottom of the window to enlarge both videos simultaneously. Drag either screen to pan, and both move together — always showing the same area of the frame. Whether you're hunting for blocking artifacts, banding, sharpness differences, or subtle color shifts, you can push in to pixel level and compare with confidence.
Play, pause, fast-forward, rewind, and a seek slider with precise time indicators let you navigate to any moment quickly. The zoom slider appears at the bottom of the window only when a video is loaded, keeping the interface clean and focused. Built as a native macOS app, VideoMelius delivers smooth, stable performance without extra overhead.
Use the Select Video #1 and Select Video #2 buttons to open files through a standard file dialog, or drag and drop video files directly onto each side of the window. The app resets zoom and position automatically when a new file is loaded so you always start with a clean view.
Click the Select Video #1 and Select Video #2 buttons to open files via the file dialog, or drag and drop a video file onto each side of the window. The app supports any video format that macOS can play.
Hit play and both videos run in perfect synchronization. Use the seek slider to jump to the moment you want to compare, or use the fast-forward and rewind buttons to step through frame by frame.
Pull the zoom slider upward to enlarge both screens simultaneously. Drag anywhere on either video to pan — both screens move together. Inspect compression artifacts, color accuracy, sharpness, and any other quality differences at the pixel level.
"I use this every time I need to compare encode settings on a deliverable. The sync is rock solid — I can stop on any frame and both sides are always perfectly aligned. Makes bitrate tradeoff decisions so much easier."
"Our QC workflow now runs through VideoMelius before every delivery. Being able to zoom both screens at once and look for banding or noise side-by-side has caught issues we would have missed otherwise."
"I use it for before/after color grading checks. Drag and drop to load, zoom in on the same area of both clips, and the difference is immediately obvious. It's become a daily part of my finishing workflow."
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