MythTV

Since I’ve decided to try and set up a MythTV system I figured getting my DVD collection on to hard drive(s) would be a good move for convenience.

There’s a lot of information on the Internet about copying DVDs, whether to other DVDs, to CDs or to a hard drive in their original format or transcoded. I wanted to get the main movie only from a disk and transcode it to XviD for space saving. Here are the steps I have that worked (for Windows incidentally):

The first step is to get the main movie from the disc. This isn’t straightforward since most movies are put on DVDs in a way to deliberately make it confusing to get them off. I used a program called DVDDecrypter (getting a hold of this might be a problem since the original author doesn’t make it available any more due to a recent change in his local laws). DVDDecrypter has a mode called “IFO Mode”. IFO files are the files on a DVD that contain information about how the chapters and program streams go together. The basic idea is to find the program stream that “looks right”. In the case of a movie, the one that’s about an hour and a half long (or two hours -whatever) should be the right one.

This process is pretty quick, about 8 minutes on my Athlon 64 3000 for a movie 100 minutes long. The result is a .VOB file with just the section you selected. A .VOB is really just an MPEG file with specific encoding setting and possible subtitle information. Many media players can play these directly.

In the next part, I’ll deal with transcoding the VOB files.

It should be noted that there may be legal considerations with this sort of thing. A lot of DVDs are encrypted and bypassing the encrpytion may or may not be illegal where you live (for example it’s skirting on the edge of the DMCA). In my case I own all the DVDs I rip and the rips are of a (marginally) lower quality than the originals, don’t have 5.1 sound and are missing all the extra features. As such I feel any concept of fair use covers me morally. You have been warned however and follow any of this advice at your own risk.

Like Linux in general, there are few MythTV distributions you can get. Unlike Linux in general, most of them have specific purposes they work best for. The three popular ones I know of are:

• MythDora
• KnoppMyth
• MiniMyth

MythDora is just Fedora with MythTV (and its dependencies). This is intended to leave you with a completely usable Linux installation that includes MythTV. It comes on DVD and is certainly the largest of the three.

KnoppMyth is either based on Knoppix or Debian (or really both) depending on how you look at it. Knoppix is a slimline distribution based on Debian and KnoppMyth was originally based on Knoppix. But I’m sure I read somewhere that the latest is version is just based on Debian but in the same way Knoppix is. Whatever the situation is, all you really need to know is that it is a minimal installation that leaves you with a fully functional MythTV installation but relatively little else.

MiniMyth is the smallest of the three and the most specialised. It only runs the frontend software and only the EPIA mini-ITX motherboards. Furthermore it is designed to run disklessly booting over a network - mainly as a silent set top box in your living room.

The only one I’ve actually tried is KnoppMyth which was easy enough to install. From what I’ve been reading they all seem easier than installing MythTV into an existing installation.

I finally (technically) installed KnoppMyth (a Debian based Linux distribution designed just to run MythTV) today. I say technically since I installed it somewhere where I couldn’t connect any sort of TV signal up to it. So, although it works fine, I haven’t actually managed to test any of the important features. The only part of the installation that was a problem was that the hard drive KnoppMyth uses must be the master device on the primary IDE channel.

I had it on the secondary and it was not happy.

My interest in MythTV has also sparked my interest in TV over the Internet. Many companies offer it “secretly”, for example movies on demand from cable operators in the UK are actually streamed over the Internet and loads offer small chunks of it. But are there any companies actually transmitting top content “live” over the Internet (free or subscription)? If it’s transmitted live (i.e. everyone receives the same thing at the same time), bandwidth some of the possible bandwidth problems can be mitigated with things like IP multicasting. And if you do have something like MythTV recording it for you the problem of people not wanting to see things at the same time go away too. Well to answer the question (there was one), yes. Unfortunately for the most part they aren’t the big channels, but there are quite a few for niche areas and some countries even make their government subsidised national station available.

The first site I found for this was wwITV. They list quite a few live channels and loads of sites that offer clips. But unfortunately many of them are out of date and just return 404s. An alternative for sources of web television is tVadio. They’re newer and don’t have as much (and seem far less international) but at least the stuff they list actually exists and is of a reasonable quality (well whether you like the actual transmitted content of the channels is up to you :P). The sites listed though still only represent baby steps on the path towards true Internet television.

I just found an interesting document released by the European Broadcasting Union (their most prominent activity is the Eurovision Song Contest) regarding the future of television, specifically relating to PVR systems.

Free-to-air Television and other PVR Challenges in Europe.

It’s quite long but definitely good. Suggests revolutionary ideas like broadcasters making EPG and programme meta-data publicly available and that they should embrace “new business models” relating to content viewed through a PVR since traditional advertising is far less effective.

At no point by the way does it endorse DRM or content protection and even speaks of “the offensive use of patents” in rather negative terms…

I’ve been reading about MythTV and considering it as a replacement for Windows Media Center. Overall it has more features, has better support for multiple computers and is completely free. Unfortunately it’s only available for Linux. Which also means you have to be picky with hardware because of the lack of drivers. I’ll write more about it shortly.

MythTV.