Libraries are supported. MythVideo and MythMusic handle that. I use a fileserver with NFS mounts. Works great. I just set it to show me the file tree, I don't really use the fancy database stuff it supports. I don't do music from Myth yet, but I've seen the options and such in there. <br>
<br>For ease of setup, use Mythbuntu. It's a streamlined Ubuntu install that has some nice tools to configure the system for you. So you don't have to worry about the database etc.. Works great here. You still use the standard Ubuntu repositories, and it's a real Ubuntu install, just cut back for you so you don't have to do it manually. <br>
<br>For HD input, you can do OTA easy enough with various devices. Satelite is harder. There is only one component capture device out there right now. The Hauppauge HD-PVR. It's a USB device that does it's own compression of the component video feed to h264. It is supported, but requires patching the source. I don't know if anyone has a deb you can use to handle that part for you. It's a bit bleeding edge, but works well from reports on the list. I'm considering one for myself, but it's a ways off. <br>
<br>You can use Dish and DTV at the same time, you need capture cards for each source and you can configure them in mythtv-setup. I believe the capture device has to be dedicated to the source, you can't share one device with multipule sources. I'm sure someone will correct me if I'm wrong on that one though. <br>
<br>Playback from the HD-PVR is going to require a big CPU (3Ghz dual core seems to be the common recomendation) or hardware acceleration. For the later, VDPAU is your only choice. It requires an NVidia video card, or motherboard chipset, with a series 8 or 9 GPU. It currently requires running MythTV trunk and beta video drivers. Not an "out of the box" soultion. Give it a few months and it likely will be though, so you might consider getting the proper hardware and using it later if you want to. I have it working on a test machine and it works very well.<br>