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@bandrel
bandrel / check_hashes.py
Last active November 5, 2024 06:12
To check for and reveal AD user accounts that share passwords using a hashdump from a Domain Controller
#!/usr/bin/env python3
#Purpose: To check for and reveal AD user accounts that share passwords using a hashdump from a Domain Controller
#Script requires a command line argument of a file containing usernames/hashes in the format of user:sid:LMHASH:NTLMHASH:::
# ./check_hashes.py <hash_dump>
import argparse
import re
parser = argparse.ArgumentParser(description="Check user hashes against each other to find users that share passwords")
@jamesmacwhite
jamesmacwhite / ffmpeg_mkv_mp4_conversion.md
Last active January 30, 2026 17:29
Easy way to convert MKV to MP4 with ffmpeg

Converting mkv to mp4 with ffmpeg

Essentially just copy the existing video and audio stream as is into a new container, no funny business!

The easiest way to "convert" MKV to MP4, is to copy the existing video and audio streams and place them into a new container. This avoids any encoding task and hence no quality will be lost, it is also a fairly quick process and requires very little CPU power. The main factor is disk read/write speed.

With ffmpeg this can be achieved with -c copy. Older examples may use -vcodec copy -acodec copy which does the same thing.

These examples assume ffmpeg is in your PATH. If not just substitute with the full path to your ffmpeg binary.

Single file conversion example