: Use ffmpeg -i tango_part3.mp4 -vf "negate" output.mp4 to invert colors or extract every frame to a folder for automated scanning: ffmpeg -i tango_part3.mp4 thumb%04d.jpg -hide_banner Summary of Findings
: Use the strings command (e.g., strings tango_part3.mp4 | grep -i "CTF" ) to look for plaintext flags or URLs embedded in the binary data. 2. Metadata Examination
Metadata can often hide clues about the tool used to create the file or direct "leaks" of the flag. : Run exiftool tango_part3.mp4 .
The first step is to confirm the file type and check for basic hidden data.
: Run file tango_part3.mp4 to ensure it is actually a valid MPEG-4 video and not a renamed archive or binary.
