[linux-dvb] Re: Inserting a splitter in the DVB-Driver

[Klaus Schmidinger <Klaus.Schmidinger@cadsoft.de>]

Markus Winkler wrote:
> 
> At 09:25 29.10.2001 +0100, you wrote:
> >On Monday 29 October 2001 07:36, Markus Winkler wrote:
> > >
> > > By the way, I found a software decoder for transport streams. It works very
> > > well with windows, but perhaps you could use it on linux as well.
> >
> >Have you got a URL? I am currently using the following command (very
> >successfully) to watch live TV:
> 
> http://pvrhack.sonnik.com/tivo/dl_info.asp?DLID=45
> It's the Elcard MPEG2 Decoder
> 
> >dumprtp | ts2ps 1 2 | bfr -m 1024kB | mplayer -
> >
> >bfr is buffer application available from:
> >
> >http://www.glines.org/software/buffer.html
> >
> >This uses about 35% of a 1GHz PIII with a Matrox G450 video card.
> >
> > > >[schnipp]
> > > >
> > > > > Regarding patching the driver to multicast the TS, I don't think that's
> > > > > the right place for it.  This seems a task best suited to user-space.
> > > >
> > > >I also think so.
> > >
> > > Why? In my opinion, it should be very easy to dump the ts-data to the
> > > network from inside the driver. Sure, you dump what you see on tv, but
> > > that's exactly what i want.
> >
> >IMHO, if it is possible to do it in user space, then that is where it should
> >be done.
> >
> >Also, the driver doesn't read any data from the card unless an application is
> >reading it from either /dev/ost/dvr or /dev/ost/demux.  In the latter case
> >(for non-budget cards), the data is never in TS format inside the driver -
> >the driver uses PES streams internally. So it wouldn't be a trivial matter to
> >add streaming to the driver.
> >
> >I don't know what other applications you use with the driver, but if you use
> >VDR, then that is where you should add the streaming support.
> 
> I thought about this, but came to no conclusion yet. I think, I'll first
> implement the viewer which gets it's data from vdrstream and then, let's see.
> 
> >The main complication is the fact that VDR isn't reading data from
> >/dev/ost/dvr unless it is recording or "transferring".  You would have to
> >change it so that it always read data from that device.  I don't know how
> >Klaus would feel about that - i.e. if he would accept such a patch into his
> >version of VDR.
> >
> >Klaus - if you are reading this, do you have a view on adding RTP streaming
> >support to VDR?
> 
> Let's wait and see :-)

Sorry, I guess I have overlooked this question directed to me earlier.

I wouldn't like to have VDR _always_ read the stream, because that would probably
make channel switching slower. So if you want to do special things like this, I'm
afraid you'll have to do it in a patch of your own. VDR only reads the stream if
it actually records, or in Transfer Mode.

Klaus
-- 
_______________________________________________________________

Klaus Schmidinger                       Phone: +49-8635-6989-10
CadSoft Computer GmbH                   Fax:   +49-8635-6989-40
Hofmark 2                               Email:   kls@cadsoft.de
D-84568 Pleiskirchen, Germany           URL:     www.cadsoft.de
_______________________________________________________________


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