Detect hidden & subliminal frames in any video

📁 Upload File
🔗 Instagram / URL
📝 Batch
🎬
Drop your video here
or tap to browse
MP4 · AVI · MKV · MOV · WMV · WebM
🎶
More sensitiveStricter
Save frames before/after each flash
🎯 Auto-tune (tests 1.5×, 2.5×, 3.5× in parallel)
🌑 Detect flash-to-black (brightness drops)
🌈 Detect hue/color shifts (red→white strobing)
Starting…
📤
Upload File Waiting
Sending video to the server…
🔬
Auto-Calibrate Thresholds Waiting
Reads the opening frames to derive detection thresholds for this specific video.
Threshold High -
Threshold Low -
Mean Diff -
Std Dev -
Samples -
🔍
Scan All Frames Waiting
Sliding window of 1–3 frames detects single and multi-frame flashes.
Frame 0 / -
Progress 0%
Hits so far 0
Results Waiting
Analysis complete — results shown below.
Save these results? Keep them in History or discard and delete all saved frames.
Results
🎯 Min confidence:
0%
🔄 Re-analyze:
2.0
Report JSON
Ready

    
📊 Analysis History
📊Loading…
⚙ Settings
yt-dlp
Cloud build — yt-dlp is updated on each deploy.
Account

      
About
ReelExt Flash Frame Detector
Backend: Python / Flask / OpenCV
Downloader: yt-dlp
⌨ Keyboard Shortcuts
jNext detection card
kPrevious detection card
SpaceOpen lightbox for focused card
dDismiss / restore focused card
EscClose lightbox or overlay
Navigate detections in lightbox
?Toggle this help
🎬
Drop video to analyze
MP4 · AVI · MKV · MOV · WebM
← Prev
Prev frame
🖼Not saved
⚡ Flash
Flash frame
Next →
Next frame
🖼Not saved
Flash frame Prev frame
Prev
Flash