I was playing around with regmon and discovered some registry settings that let you set preferred codecs for .tivo files without tweaking your overall DirectShow filter settings. I am attaching a little app that I threw together to make it easier to manage them. I GUARANTEE NOTHING, SO USE AT YOUR OWN RISK. The only thing it changes are registry settings under the "HKEY_CURRENT_USER\Software\TiVo\DirectShow\PreferredFilters" key, which doesn't normally exist anyway. You can try out different combos of demuxers, audio and video codecs to see what works best for you. To set things back to normal just change them back to "(none)" or delete the entire registry key. Hope it helps somebody besides me! This version is now obsolete - see post #12 in this thread for the latest.