[linux-dvb] hvr4000-s2api + QAM_AUTO

Christophe Thommeret hftom at free.fr
Wed Sep 24 16:16:37 CEST 2008


Le Wednesday 24 September 2008 16:08:21 Hans Werner, vous avez écrit :
> > Le Tuesday 23 September 2008 18:27:57 Hans Werner, vous avez écrit :
> > > > Sure, here it is (patch against current svn
> > > > http://websvn.kde.org/branches/extragear/kde3/multimedia/)
> > > >
> > > > Atm, s2api is only used for S/S2.
> > > >
> > > > P.S.
> > > > In order to play H264/HD with kaffeine/xine, you need a fairly recent
> > > > ffmpeg
> > > > and xine compiled with --with-external-ffmpeg configure option. (and
> >
> > of
> >
> > > > course a quite strong cpu, unlike my old athlon-xp-2600 :)
> > > > However, you can still record and/or broadcast without this update.
> > >
> > > Success! Many thanks Christophe.
> > >
> > > With the following:
> > > HVR4000 card
> > > S2API + multifrontend patch (hg clone
> >
> > http://linuxtv.org/hg/~stoth/s2-mfe)
> >
> > > ffmpeg from SVN
> > > xine-lib from mercurial (compiled with --with-external-ffmpeg)
> > > Kaffeine from SVN + Christophe's S2API patch
> >
> > Good :)
> >
> > > Scanning to find channels and tuning are working in Kaffeine for 
> > > DVB-T, DVB-S and DVB-S2. S/S2 tuning and scanning is with S2API.
> > >
> > > My CPU (3ghz core 2 quad) is fast enough to show live HD video so I can
> > > watch HD channels live inside Kaffeine,
> >
> > Lucky you :)
> >
> > > or record to disk and watch
> > > afterwards. ASTRA HD+ and ANIXE HD are good. ARTE HD throws some errors
> >
> > and
> >
> > > stutters a bit. Simul HD can crash Kaffeine.
>
> Does anyone have any info about Arte HD or Simul HD?
>
> > > I enabled the two lines in dvbstream.cpp which set modulation to QPSK
> > > instead of QAM_AUTO for DVB-S.
> >
> > So, you see this also. This was my original report, and why i introduced
> > this
> > fix.
> >
> > > Settings: number of xine threads >= 4, de-interlacing(CTRL-I) at
> > > minimum (is it useful for HD ?
> >
> > Yes for 1080i but not for 720p.
> >
> > > I don't know). The load isn't always distributed
> > > well across the 4 cpus -- it can max out one of them sometimes, with
> > > the others almost idle. Perhaps this can be improved.
> >
> > Perhaps, but this is ffmpeg stuff.
>
> Yes. The multithreaded decoding does spread the load well for some HD
> channels.
>
> > Btw, while cx24116 single-frontend seems pretty stable, the mfe driver is
> > not
> > here. As soon as i switch to dvb-t, the cx24116 firmware crashes (at
> > least seems so: ~"Firmware doen't respond .." ) and is reloaded on next
> > S/S2 zap,
> > and after a while, the dvb-t signal appears more and more noisy. I have
> > to unload/reload the modules to cure this.
>
> Oh. I haven't seen any problems like that or heard it reported before.
> I am using firmware version 1.23.86.1. Which version are you using?

1.20.79.0


-- 
Christophe Thommeret




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