OK, once again thanks very much, moyekj. This works, I can now see the captions on my tivo. But all is not completely well - the captions are recognizable, but badly garbled. Exactly as they are when I play the same mpg file with VLC on my PC. some letters are duplicated, some are added, others are missing. Any thoughts on where the corruption may be occurring, or how I might track it down? What settings should I use in kmttg when I decrypt the .tivo files? And thanks again for your help, and of course for kmttg.