[mythtv] Re: Adding DVB-T support to MythTV

[matt.jarvis at philips.com]

I have also posted this suggestion to the list. See my earlier post with 
my idea about channel changing scripts - what is needed is something to 
parse a seperate config file between channel numbers and dvbtune 
frequencies. As far as acutally using the card, I've only just got mine 
and haven't even tried it yet. Does the dvb driver actually create a v4l 
interface ( I think it creates a /dev/dvb device but is this a standard 
v4l interface ) ? The docs for the dvb driver are v.beta and it's 
complicated stuff. I belive in the full featured dvb-s cards ( with an 
onboard mpeg decoder ) this is a v4l interface so it would work out the 
box with mythtv once an external channel change script is available If the 
interface can't be connected to directly via mythtv using the /dev/dvb 
interface as a v4l interface, then your other option is to use a seperate 
mpeg card ( for example the realmagic hollywood plus ) which with the dvb 
driver it is possible to send the mpeg output from the dvb-t card into the 
mpeg card and out through the tv out on the mpeg card as decoded video. 
This output could then be rerouted back in through another cheap wintv 
card, which can be used by mythtv. This is a bit of a messy workaround 
involving three cards to do the work of one - I'm not a programmer but 
there should be a way to either decode the mpeg output of the dvb-t card 
in software and create a v4l interface which mythtv can use. I looked 
around at just doing this with pipes - to convert the transport or program 
stream and then pipe it to a virtual v4l interface. I can decode the 
stream to various video formats using pipes but couldn't find any answer 
about how to make a decoded stream available as a /dev/video. Anyone got 
any clues on piping streams direclty to a virtual /dev/video ? The 
problems associated with this approach would probably be timing issues due 
to the high level of processing going on. However, it would be interesting 
to have the discussion and see what else is thrown up. 

Best Wishes

Matt

Matt Jarvis
Product Marketing Manager
Marantz Professional Europe
Kingsbridge House, Padbury Oaks, 575-583 Bath Road, Longford, Middx, UB7 
0EH, United Kingdom
+447796610410 - Mobile
+441753686080 - UK Office
+441753686020 - Fax
matt.jarvis at philips.com
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