Play video file from memory (play decryption file) using C#

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C#

encryption

I encrypt my 'video.mp4' into 'encrypt.mp4' . Now I should decrypt my file and save decrypt file to memory at the start of my application. and play them using DirectX in C#.

How to play encrypted video file using DirectX and memoryStream? I dont want to save my video to hard drive (temp folder or another folder) I want to play directly from memory ...

What I have tried:

this code is encrypt and decrypt code :

private void EncryptFile(string inputFile, string outputFile)
   {


       try
       {
           string password = @"myKey123"; // Your Key Here
           UnicodeEncoding UE = new UnicodeEncoding();
           byte[] key = UE.GetBytes(password);


           string cryptFile = outputFile;
           FileStream fsCrypt = new FileStream(cryptFile, FileMode.Create);


           RijndaelManaged RMCrypto = new RijndaelManaged();


           CryptoStream cs = new CryptoStream(fsCrypt,
               RMCrypto.CreateEncryptor(key, key),
               CryptoStreamMode.Write);


           FileStream fsIn = new FileStream(inputFile, FileMode.Open);


           int data;
           while ((data = fsIn.ReadByte()) != -1)
               cs.WriteByte((byte)data);




           fsIn.Close();
           cs.Close();
           fsCrypt.Close();
       }
       catch
       {
           MessageBox.Show("Encryption failed!", "Error");
       }
   }


   private void DecryptFile(string inputFile, string outputFile)
   {


       {
           string password = @"myKey123"; // Your Key Here


           UnicodeEncoding UE = new UnicodeEncoding();
           byte[] key = UE.GetBytes(password);


           FileStream fsCrypt = new FileStream(inputFile, FileMode.Open);


           RijndaelManaged RMCrypto = new RijndaelManaged();


           CryptoStream cs = new CryptoStream(fsCrypt,
               RMCrypto.CreateDecryptor(key, key),
               CryptoStreamMode.Read);


           FileStream fsOut = new FileStream(outputFile, FileMode.Create);


           int data;
           while ((data = cs.ReadByte()) != -1)
               fsOut.WriteByte((byte)data);


           fsOut.Close();
           cs.Close();
           fsCrypt.Close();


       }
   }