How do you check whether a video has been tampered with? You've probably already checked the frame rate. But did you check whether the frames themselves were lying?
snapWONDERS runs two opposite checks on every uploaded video. "Inter-frame tampering?" flags a frame-to-frame difference spike — consistent with a splice, insert, or join. "Duplicate frames detected?" flags near-identical consecutive frames — consistent with a freeze or dropped-frame cover-up.
Both have real, non-malicious false positives worth knowing: a whip pan or a hard cut between camera angles trips the first; a 24fps→30fps pulldown conversion — which manufactures genuine duplicate frames as a side effect of the conversion maths, not a cover-up — trips the second. Static tripod shots and screen recordings do too.
Full writeup, including how the two signals get read together rather than alone: https://kennethbspringer.au/2026/09/23/video-frame-tampering-duplicate-frames/?utm_source=mastodon&utm_medium=social&utm_campaign=article-21
#videoforensics #digitalforensics #OSINT