[kwlug-disc] Future of [Rogers] PVR (wrt HDMI)? Black boxes? MythBuntu?
john at netdirect.ca
john at netdirect.ca
Wed Sep 9 09:54:20 EDT 2009
kwlug-disc-bounces at kwlug.org wrote on 09/09/2009 08:35:46 AM:
> From: "L.D. Paniak" <ldpaniak at fourpisolutions.com>
> You aren't going to see black-box HDMI-in for DRM reasons. Even
> HDMI-out for over-the-air digital signals is potentially subject to DRM
> (see: broadcast flag)
In fact if you look closely at HDMI and Blu-ray you find that the
technology allows for disablement of devices.
HDMI and Blu-ray devices each have a manufacturer key that is used to
negotiate an encryption key with other devices. Blu-ray media has the
publisher's media key that must be authenticated before playing.
Blu-ray media also has an update block that contains updates to the key
sets. One possible update is key revocation. If a blu-ray disk contains a
key revocation update for your big expensive HDMI-connected TV, and you
put that in your player, it may refuse to play on your TV. It may even
disable your player, although that's not clear.
I don't think HDMI has an update "feature", but it may mean that a new
receiver or player may refuse a connection to your TV or vice versa.
Key revocation is supposed to be allowed so that if a key is exposed it
will be revoked. In today's world how long does it take hackers to find a
key that is embedded in firmware? Less than a day?
> It looks like the only way to capture HD TV in a F/LOSS manner is to use
> the Hauppauge HD-PVR. It captures HD signals from the composite ports
> on your cable box/digital source and outputs them over USB to H264.
> While the captured signal is not the native digital, I find the results
> are more than satisfactory for TV watching.
> The upcoming mythtv 0.22 has support for this device along with VDPAU to
> accelerate HD playback on newer Nvidia graphics cards. The upcoming
> mythbuntu 9.10 doesn't look to go this far, but there are deb
> that will let you build your own deb-PVR fairly easily.
I have an HD-PVR at home. I haven't yet found the time to upgrate the Myth
on my Mythdora box. I could easily move to Fedora Rawhide and install Myth
svn pacakges. One bump in that road is that all the clients may need to be
updated and I don't have an updated package for my AppleTV.
Robin, who presented Myth at the lug twice loves his Popcorn hour. I
presume he uses it in conjunction with Myth.
Myth is still a tinkerer's PVR. You would have to want to select the
hardware, choose the placement (a PC is loud), install, tweak and fix. If
you want analog TV it's easy, just pick a tuner card with TV out and
you're done (hauppauge 350).
If you want digital cable in Canada, you need to couple it with a Rogers
or Bell receiver and marry in a IR blaster or something. Digital cable
tuner/capture cards would be the best option, except that Rogers encrypts
almost all of the channels.
Until someone builds and markets a quiet unit with Myth it will be a
As for formats I don't know if Myth will play an ISO image. It will play a
DVD I think.
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