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Asked: 2026-06-09T20:45:49+00:00

I encrypted video file (encrypted file on Dvd). How can I decrypt file and

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I encrypted video file (encrypted file on Dvd). How can I decrypt file and display in media player without copy file(decrypted file) in disk(Hard drives)?(c# & winforms)

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  1. Editorial Team

    You have three options, from hardest to easiest (both hard anyway)

    1. You can implement a codec to decode video file. Without a proper codec even a uncompressed avi file seems like encrypted to Media Player. All decryption is in codec.
    2. You can implement a Frame Server like VirtualDub did. In this case you will need to implement a codec too. Decryption is delegated to Frame Server application. In virtualDub case, codec was just a man-in-middle.
    3. You can implement a streaming web server like uTorrent did. This is the easiest, you just need to implement HttpServer, which I believe is not so hard in C#, to decrypt and stream data. Tricky part is, you may need to keep an index of encrypted blocks to enable forwarding.
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