Thanks for your question.
1. I assume you can play high-bitrate .ts files off of the Firewire drive and off of DVD-Rs. Is that right? Can you play them off of Samba shares? Can you play them from UPnP servers? I burn pretty-much all my caps to DVD-R. Other media (my backup of my music CD collection, and some of my own video) is spread across 1TB and a 2TB Linux RAID servers which have Samba shares.
We did not play .ts files but we did play HD mpeg2 files that were recorded at 18Mbps. There was no problem playing the file on three system simultaneously. We did not test playing HD content stored on a DVD as this was setup to stream off the hard drive.
2. Is there a clear-QAM-capable HD tuner for the Mac, similar to the FusionHDTV USB? I do know that Firewire recording is well-supported on the Mac (better than on Windoze).
Yes. Its made by Miglia and it uses El Gato's Eye TV Software for the GUI.
3. Can DVDPedia manage cataloging of offline media? Can it manage cataloging of transport streams and other video formats? I assume it doesn't really know about the content of the items you're cataloging, other than where to find them, but some clarification would be great.
DVDPedia is strictly a cataloging application. When you hit play it launches the appropriate application. That can be the DVD player, VLC, or Quicktime
Hope this helps.
Ara