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main.py
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main.py
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# Importing requiered modules
from stegano import lsb
from os.path import isfile,join
import time
import cv2
import numpy as np
import math
import os
import shutil
from subprocess import call,STDOUT
# Function to split the message.
def split_string(split_str,count=10):
per_c=math.ceil(len(split_str)/count)
c_cout=0
out_str=''
split_list=[]
for s in split_str:
out_str+=s
c_cout+=1
if c_cout == per_c:
split_list.append(out_str) # The message is divided into substrings
out_str=''
c_cout=0
if c_cout!=0:
split_list.append(out_str)
return split_list
# As we know video is a collection of frames, where each frame is a picture.
# This function will extract each frame along with audio from the video.
def frame_extraction(video):
if not os.path.exists("./temp"):
os.makedirs("temp")
temp_folder="./temp" # Temporary folder created to store the frames and audio from the video.
print("[INFO] temp directory is created")
vidcap = cv2.VideoCapture(video)
count = 0
while True:
success, image = vidcap.read()
if not success:
break
cv2.imwrite(os.path.join(temp_folder, "{:d}.png".format(count)), image)
count += 1
# This function would embed the splitted string into the frames extracted from the video.
def encode_string(input_string,root="./temp/"):
split_string_list=split_string(input_string) # Acquire the splitted string from the message.
for i in range(0,len(split_string_list)):
f_name="{}{}.png".format(root,i)
secret_enc=lsb.hide(f_name,split_string_list[i]) # Embedded the splitted string into each frame.
secret_enc.save(f_name) # Saved the frames after hidding the strings.
print("[INFO] frame {} holds {}".format(f_name,lsb.reveal(f_name)))
print("The message is stored in the Embedded_Video.mp4 file")
# This function would decode the hidden message by extracting frames from the video
def decode_string(video):
frame_extraction(video) # Extracting each frame from the video
secret=[]
root="./temp/"
for i in range(len(os.listdir(root))):
f_name="{}{}.png".format(root,i)
secret_dec=lsb.reveal(f_name) # Revealing the message inside each string
if secret_dec == None:
break
secret.append(secret_dec)
print(''.join([i for i in secret]))
clean_temp()
# This function would delete the temp directory
def clean_temp(path="./temp"):
if os.path.exists(path):
shutil.rmtree(path)
print("[INFO] temp files are cleaned up")
# This function would extraxt audio from the video so as to stitch them back later.
def input_main(f_name):
input_string = input("Enter the message :") # To collect the message
frame_extraction(f_name)
# The call function would be used to extract the audio and then stitch it again properly with the frames extracted.
call(["ffmpeg", "-i",f_name, "-q:a", "0", "-map", "a", "temp/audio.mp3", "-y"],stdout=open(os.devnull, "w"), stderr=STDOUT)
encode_string(input_string)
call(["ffmpeg", "-i", "temp/%d.png" , "-vcodec", "png", "temp/Embedded_Video.mp4", "-y"],stdout=open(os.devnull, "w"), stderr=STDOUT)
call(["ffmpeg", "-i", "temp/Embedded_Video.mp4", "-i", "temp/audio.mp3", "-codec", "copy", "Embedded_Video.mp4", "-y"],stdout=open(os.devnull, "w"), stderr=STDOUT)
clean_temp()
if __name__ == "__main__":
while True:
print("1.Hide a message in video\n2.Reveal the secret from the video\n")
print("Any other value to exit\n")
choice = input("Enter your choice :")
if choice == '1':
f_name=input("Enter the name of video file with extension:")
input_main(f_name)
elif choice == '2':
decode_string(input("Enter the name of video with extension :"))
else:
break