[mythtv-users] Myth recording ~100MB of a show and stopping - Is this due to encryption?

[Mythtv - SIlicondust]

On Thu, Feb 19, 2015 at 6:23 AM, Matt Emmott <memmott at gmail.com> wrote:

> I have an HDHomeRun Prime with Charter in Massachusetts. Recently I
> started seeing issues with several channels like FX HD and Palladia where
> Myth would record the first 100mb of the show or so, and then just stop
> (though the tuner would stay in use through  the scheduled duration of the
> show).
>
> I found that my HDHR firmware was woefully out of date so I updated to the
> latest version. I then performed a scan of all channels from the HDHR's web
> interface and found that several of the problem channels had a little "DRM"
> image next to them. This makes me think that perhaps Charter has just
> flipped the encryption (or at least the "Copy Once") switch on these
> channels. It's odd though that I'd get the first 30-60 seconds of a show
> before it stops working. If encryption is really my issue wouldn't it be an
> all-or-nothing kind of scenario?
>
> Getting some data and then none + DRM flag suggests CGMS content
protection is being triggered.

A recent CableLabs rule change has allowed CGMS to be ignored. This has
been implemented in HDHomeRun firmware 20150113 or newer.

The latest beta release can be found here:
https://www.silicondust.com/forum/viewtopic.php?f=19&t=2484

Nick
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