FFMPEG encrypt & decrypt Video offline

[dara.alavi]

Hello
All Freinds Please Help ME:
I want encrypt & decrypt Video file With FFMPEG oflfine mode in hard disk.
I encrypt a Video File (mp4 Extention) by ffmpeg.exe Tools by this Command:

f

fmpeg -i SampleVideo_1280x720_1mb.mp4 -vcodec copy -acodec copy
-encryption_scheme cenc-aes-ctr -encryption_key
76a6c65c5ea762046bd749a2e632ccbb -encryption_kid
a7e61c373e219033c21091fa607bf3b8 SampleVideo_1280x720_1mb_encrypted.mp4

for decryption : i want decrypt and play video file (encrypted.mp4) in my player source c++ (ffmpeg base) and now i dont wnat use decrypt file with command line with ffplay.exe *like this :

ffplay SampleVideo_1280x720_1mb_encrypted.mp4 -decryption_key 76a6c65c5ea762046bd749a2e632ccbb

I do not need ffplay.exe because i downloaded FFMPEG dev and i have written my own player program Which is based on FFMPEG! with QT & C++.
I dont want use ffplay.exe that exist static FFMPEG Folder. .
I want decrypt and play Encrypted File in my player program Through Programing code.

Now how to decrypt encrypted files using FFMPeg API with C++ Programing?
I searched a lot but did not find anything.

I look at ffplay source code it, but I could not understand how it did it.
Call different functions and library .

There is no explanation on how to use it. Frown |
I did not find a sample.. Frown |

thanks in advance.