title: How to encrypt video within mkv?
body: <p>So, we will be given mkv files that are to be sent to multiple client sites.  We need to encrypt the contents of those files prior to transmission, but in a way that the client can begin to playback those files, decrypting them on the fly.  We know we can simply encrypt the file itself, but then the client would have to decrypt it prior to playback, leaving the unencrypted file open for pilfering.  Have been googling for encrypt mkv but have not yet turned up anything.  Is this possible to do?  A library to accomplish this (Windows encryption side, Linux playback side) would be ideal but a cross-platform app would suffice in a pinch.</p>