[Python] How to Repair Corrupted WebM Files with digital forensics methods Using Python?...

File

I downloaded some videos from the web a long time ago, but they have since become corrupted. Upon inspection with a hex editor, I noticed that null bytes (0x00) have been appended at random places in the files. I attempted to extract the WebM content using the magic bytes, and while the method was partially successful, the audio and video are still glitching. I don't understand how the files got damaged and would appreciate if a forensic YODA blesses me with their time.

I tried vlc, sm player and some others and none of them worked . This is the code I used to extract the webm file out of this corrupted file :

import sys

def extract_webm(input_path):
try:
with open(input_path, 'rb') as file:
data = file.read()

# WebM magic bytes
magic_bytes = b'\x1A\x45\xDF\xA3'
start_index = data.find(magic_bytes)

if start_index == -1:
print(f"No WebM file found in {input_path}")
return

# Extract the WebM file from the start index to the end of the data
webm_data = data[start_index:]

output_path = f"extracted_{input_path}"
with open(output_path, 'wb') as output_file:
output_file.write(webm_data)

print(f"WebM file extracted and saved as: {output_path}")
except Exception as e:
print(f"Failed to extract WebM file from {input_path}: {e}")

if __name__ == "__main__":
if len(sys.argv) != 2:
print("Usage: python extract_webm.py <input_file>")
sys.exit(1)

input_file = sys.argv[1]
extract_webm(input_file)


sadly it was unable to recover the file completely . Please use the link to download the file . I have many such files so if possible a python script would be nice or would be helpful you can point me to resources.

Continue reading...