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

[Richard King]

On Wed, 19 Mar 2003, Matthew S. Hallacy wrote:

> On Wed, Mar 19, 2003 at 09:28:32AM +0000, matt.jarvis at philips.com wrote:
> > Dear Richard
> > 
> > I completely agree the decoding to re-encode is wasteful, but considering 
> > that in order to run myth most people are using way powerful processors 
> > anyway, there certainly looks like there should be enough cpu cycles 
> > floating around to not make this an issue ( my box has an athlon xp 1800, 
> > with 512mb of memory. )
> 
> It's utterly stupid to do this, there is nothing to prove -- yes, you can
> decode the stream, them shove it back into something that Myth can accept.
> 
> Why bother? You might as well use the A/V inputs on a standard WinTV card.
I aggree that its not worth it. I can see why its been suggested though 
and yes it is like using the AV inputs on a wintv card but a) the nova 
cards dont have a tv out and if you have a nova card why bother buying a 
wintv card in the first place.
 
> > The proper way to do this, does NOT require a 'rewrite' of MythTV. As
I wasnt suggesting this. Just rearranging the NuppelVideo bits with bit of 
glue.
  
> Isaac has stated before, you simply need to add support for MPEG(1/2) 
> input streams. From what I've been told, it wouldn't even be terribly
If you've been following the thread its not quite as simple as that. Thats 
all you need to do if you've got one of the Hauppauge PVR cards but DVB is 
not quite the same. Though for simple support its still not that difficult 
if you pipe data in from external commands.

> hard, it just needs someone who can wrap their brain around C++ and 
> NuppelVideo. Please, don't waste your time on such a horrid hack that
> does no good.
> 
> The only other modification you might need is the storage format, I'd hate
> to be getting a high quality MPEG-2 stream only to waste CPU re-encoding
> it into some other format.
I don't think you need to modify the storage format at all. Issac has 
added support for 'ffmpeg' streams in NUV files. an MPEG2 stream can be 
considered just that given specifying the right codec in the header.

-- 
Richard King
E-mail: rak at cs.man.ac.uk