Whether your hacking machines as part of the OSCP, a bug bounty program, hackthebox.eu or on an active pentesting engagement you may find yourself needing to decrypt various forms of data on the fly.
Of course theres plenty of online tools out there but if your a developer and already have PHP installed on your system you may find some of the following very useful, for the video decoding and encoding you will need to have FFMpeg cli installed
