Cryptography RSA or AES

what I want exactly is to hide a steganography text into video and audio file with using (AES,RSA) cryptographic algorithm and the reverse functionality for the operation. the all idea I'm first need to encrypt the data with ( AES or RSA) the user chose the encryption algorithm that he want. then hide in audio file or video file using LSB ( the user chose the number of bit he will used to hide) . in the other hand I can in reverse extract the data and then decrypted it ) want GUI and list options allow the user chose video or file . then after he write the text can chose the crypto algorithm to encrypt the text ( we will use two algorithm RSA and AES ) then after that he chose the number of bit to hide data in it . and also GUI shows the stego file and I can save it to do compare between it and the original file and show how much bit is change .