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How can I decrypt the encrypted MP4 file using FFmpeg?
I am using following command to encrypt the mp4 file having two video tracks and one audio track. How to decrypt the encrypted file and store it with some other name using ffmpeg?
How to convert encrypted MPEG DASH created with…?
You need the decryption key value (not the KID) for each track (I will not explain how to find the key value;) and then from your video and audio files use mp4decrypt from bento4 (just google it if you don’t have it yet): mp4decrypt –key KID:00112233445566778899AABBCCDDEEFF audio.m4a audio_decrypted.mp4
Can a DRM stop you from using FFmpeg?
DRM is designed and created to stop you from doing it. DRM can have software reader or hardware reader. Hardware reader will not give you neither decryption key, neither decrypted content. Software reader will do it in most obfuscated way possible. So ffmpeg does not have such option because it is virtually impossible by design of DRM.
How to download and encode a video from a MPD manifest?
I believe the concatenation step will not work due to the encryption, but I do not know how to get the key information from the MPD file neither how to decrypt before. The following link says it should be easy, but something is not working (probably missing a decryption step): How to download and encode a video from a MPD manifest?
What is the correct syntax to do CENC encryption with ffmpeg?
What is the correct syntax to do CENC encryption with ffmpeg? The ffmpeg 3.0 release notes include “Common Encryption (CENC) MP4 encoding and decoding support”, and the files libavformat/movenccenc.h and libavformat/movenccenc.c seem to include everything needed to encrypt MP4 files according to the Common Encryption standard.
Where can I find documentation on the FFmpeg options?
However, I can’t find any documentation on this topic in the ffmpeg manual pages. Mulvya’s answer covered the ffmpeg-options. I’m just adding a concrete example and talk about playback too, as i did some experiments yesterday (independently).
Where do I find the encryption key for FFPlay?
The value of -encryption_key can be any valid 32 byte hexadecimal number. ffplay accepts the -decryption_key both before and after the filename. The ffmpeg decryption command line must have the -decryption key before the -i filename.