sox audio.wav slice.wav trim 8 2
curl -s https://adult.contents.fc2.com/video/1864525/ > page.html
strings payload.bin | grep -i flag # => flagFC2_PPV_1864525_fake
sonogram -i audio.wav -o spectrogram.png # (or use Audacity → Analyze → Plot Spectrum)
exiftool frames/frame_00123.png | grep -i comment
from morse_talk import decode_morse # Convert the timing into dots/dashes manually or with a script. # The result: .... .-.. .-.. --- ... (example)