Diff QC · Same shot, which file is right?
Two to four versions of the same shot in, one ranked answer out. Or a whole batch, pair by pair.
Container and bitstream probe, frame-accurate capture, temporal alignment, SSIM / PSNR pixel comparison against a reference, per-clip anomaly detection (lighting, texture, banding, noise, clipping, framing, audio) and a composite ranking. It works on stills too (JPG, PNG, WebP, AVIF): dimensions, JPEG quality, colour profile, EXIF and generator metadata, and a pixel-by-pixel comparison. Drop a still alongside a clip and it finds the frame the still matches.
Part of CineQC by Marc Warfield. Methodology →
100% client-side. Nothing leaves this browser.Drop 2 to 4 files: short clips (20 s max), stills, or a mix. Or click to pick.
MP4 / WebM / MOV · JPG / PNG / WebP / AVIF · the first file is the reference, you can change it below
Clip capture steps through every source frame, so it needs desktop Chrome or Edge. Expect roughly 1 to 2 times real time per clip, longer with the native pixel-exact pass. Stills take a few seconds each.
Summary
Verdict
Pairwise
Put the outputs of two models, two encoders or two versions side by side. Files are paired by name, so "grok_prompt07.mp4" in Set A is compared with "veo_prompt07.mp4" in Set B. Each pair gets the full comparison, a winner and a margin, and the run ends with a summary you can export as a table or as preference pairs for training.
No files yet
or drop clips and stills here
No files yet
or drop clips and stills here
Summary
Click a row for the detail. Scores use the same checks as the compare mode; a margin under 1 point is a tie.