: 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
If the metadata is clean, the "secret" is likely inside the video or audio streams.
: Switch from Waveform to Spectrogram. Flags are frequently drawn into the audio frequencies (Visual Audio Steganography).
: 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