[mythtv-users] remote viewing/UPnP question

Nick Rout nick.rout at gmail.com
Sun Sep 30 22:02:47 UTC 2012

On Mon, Oct 1, 2012 at 9:20 AM, Ross Boylan
<RossBoylan at stanfordalumni.org> wrote:
> Short-term goal: View TV shows recorded on my Debian GNU/Linux box with
> mythtv on a Windows Vista laptop (which is connected to my TV).  myth is
> running in a chroot.

Why not simply install mythfrontend on the windows machine?

> Educational goal: Understand the underlying networking and technologies
> (UPnP, DLNA, zeroconf, mdns) better, at least well enough to solve my
> immediate problems.
> Longer-term goal: View TV using a dedicated myth front end.
> I've taken a couple of runs at accessing myth remotely, but have yet to
> succeed.  Some of the docs I read confused me.  In particular,
> http://www.mythtv.org/wiki/UPnP says "Make sure you have a route for
> out your lan nic BEFORE mythbackend starts (route add -net
> eth0). It seems it won't work if you add the route later."
> But other material suggests that isn't the only IP range that needs
> special handling.  http://en.wikipedia.org/wiki/Universal_Plug_and_Play
> says that version 1.1 references http://tools.ietf.org/html/rfc3927
> which in turn refers to 169.254.*.*.  And the discussion of multicast at
> http://tldp.org/HOWTO/Multicast-HOWTO-2.html says 224.0.0.* is for
> management of the multicast 239.*.*.* addresses.
> Since I'm running DHCP perhaps some or all of this is not relevant to
> me.  But I'm wondering if taking care of routing and firewalling 239.*
> is adequate.  Also, do I need to fiddle with the Vista firewall?
> Do I need to do something with IPs other than 239.0.0.*?
> I discovered that mysql was set for remote mythtv logins, but granted no
> privileges to them.  I have corrected that, and verified that mysql is
> bound to a local IP address (192.168.40.x).
> I have 2 NICs, one for the local network and one for the outside world.
> I have permissive firewall rules within the local network, but only for
> the 192.168.40.* IPs.  I have not done anything special for any of the
> 239.*, 169.254.*, or 224.0.0.* IPs in the firewall or routing.  I think
> that means they get routed to my NIC for external networks.  Maybe they
> are routed there and then killed by the firewall.
> My server connects to the laptop through a wireless router.  Do I need
> to set anything in the router so that it will handle non-192.168.40.*
> IPs?
> I tried using Vista's Media Center (WMC) and Media Player (WMP) to
> access the recordings.  I think they do UPnP, though the information
> I've found is sketchy.  Does anyone know if they work?  If they don't I
> can install xbmc.  Apparently a windows version of the current myth (I'm
> running 0.25.2 from Marillat's repos) is not available.
> It looks as if myth's server can serve files directly from the
> recordings (there is a setup screen that asks you to pick
> music/video/recordings for UPnP--I'm not sure why it's only one, but I
> set if for recordings).  Some material indicates I need to set up a
> video directory, which I have not done.  It would be empty anyway.  Some
> of that material says I need to configure the external machine name in
> the folder location, and I see no way to do that.
> WMC and WMP do not detect any media servers as far as I can tell.
> avahi-discover running on my linux box also does not report any sign of
> myth.
> The recordings are directly accessible from the laptop via samba.  Aside
> from the browsing situation being bad because there are a ton of files
> with names that do not reveal their content (I ran the mythfrontend on
> my linux system to find a show and its file name), playing files hasn't
> worked out.  WMC crashed after a short play (but then again, it does
> that even for its own files).  The media player played the show I
> selected, but gave me the Spanish audio track and no way I could find to
> change the track.
> Finally, some of the TV's I might get say they do DLNA.  Does that mean
> they will work with UPnP, or is something more required?  I realize that
> even if they work the experience won't be great.
> Thanks for any help you can provide.
> Ross Boylan
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