[linux-dvb] Re: Newbie questions

[Mike Albon <mikea@yuri.org.uk>]

Hi Bruno,

You'll want to add '-qam 16 -cr 3_4' to both the dvbtune and dvbstream
lines.

Also 600 601 doesn't sound right, try 601 602 on 505833 (with -qam 16
-cr 3_4)

Mike

On Tue, 2003-01-07 at 23:23, Bruno Prior wrote:
> Gavin,
> 
> Thanks for the pointers.
> 
> Gavin Hamill wrote:
> > 
> > For BBC / Freeview muxes:
> > 
> > dvbstream -f 754167 -qam 16 -cr 3_4 -ps 600 601 -o | mplayer - -nocache
> > 
> > For ITV and C5 muxes
> > 
> > dvbstream -f 834167 -qam 64 -cr 2_3 -ps 512 650 -o | mplayer - -nocache
> 
> I tried this, but using 505833 and 481833, which I think are my 
> equivalent frequencies (I believe my nearest transmitter is Crystal 
> Palace). I get the following output with 481833 (and something similar 
> with 505833):
> 
> dvbstream v0.4pre3 - (C) Dave Chapman 2001
> Released under the GPL.
> Latest version available from http://www.linuxstb.org/
> Using GNU internationalization
> Original domain: messages
> Original dirname: /usr/share/locale
> Current domain: mplayer
> Current dirname: /usr/share/locale
> 
> 
> MPlayer 0.90rc1-3.2 (C) 2000-2002 Arpad Gereoffy (see DOCS)
> 
> CPU: Advanced Micro Devices  (Family: 6, Stepping: 0)
> CPUflags:  MMX: 1 MMX2: 1 3DNow: 1 3DNow2: 1 SSE: 1 SSE2: 0
> Compiled with RUNTIME CPU Detection - warning, it's not optimal! To get 
> best performance, recompile MPlayer with --disable-runtime-cpudetection
> Reading config file /etc/mplayer/mplayer.conf
> Reading config file /root/.mplayer/config
> Reading /root/.mplayer/codecs.conf: can't open 
> '/root/.mplayer/codecs.conf': No such file or directory
> Reading /etc/mplayer/codecs.conf: 49 audio & 123 video codecs
> init_freetype
> Using Linux hardware RTC timing (1024Hz)
> Can't open input config file /root/.mplayer/input.conf : No such file or 
> directory
> Input config file /etc/mplayer/input.conf parsed : 50 binds
> Opening joystick device /dev/input/js0
> Can't open joystick device /dev/input/js0 : No such file or directory
> Can't init input joystick
> Setting up lirc support...
> mplayer: could not connect to socket
> mplayer: No such file or directory
> Failed opening lirc support!
> You won't be able to use your remote control
> 
> Playing -
> Reading from stdin...
> Using DVB card "Grundig 29504-401"
> tuning DVB-T (in United Kingdom) to 481833000 Hz
> polling....
> Getting frontend event
> FE_STATUS: FE_HAS_SIGNAL FE_HAS_LOCK FE_HAS_CARRIER FE_HAS_VITERBI 
> FE_HAS_SYNC
> Bit error rate: 433
> Signal strength: 12079
> SNR: 54227
> FE_STATUS: FE_HAS_SIGNAL FE_HAS_LOCK FE_HAS_CARRIER FE_HAS_VITERBI 
> FE_HAS_SYNC
> Output to stdout
> Streaming 2 streams
> 
> Nothing ever shows on screen. If I use -vo sdl, it's much the same, 
> except with the odd line saying "Cache fill: 0.00% (0 bytes) polling..." 
> and a much higher bit error rate. If I use -noaspect, the bit error rate 
> is low again, and I get the Cache fill messages again if I don't combine 
> it with -nocache. If I try using gmplayer instead of mplayer, I get a 
> window filled with blue, but never a picture.
> 
> 
> > Use 'dvbtune -i' on each mux to find out the lists of PIDs available to 
> > replace '600 601' with ...
> 
> dvbtune -i -f 505833 gives:
> 
> Using DVB card "Grundig 29504-401"
> tuning DVB-T (in United Kingdom) to 505833000 Hz
> polling....
> Getting frontend event
> FE_STATUS: FE_HAS_SIGNAL FE_HAS_LOCK FE_HAS_CARRIER FE_HAS_VITERBI 
> FE_HAS_SYNC
> Event:  Frequency: 505833000
>          SymbolRate: 0
>          FEC_inner:  2
> Bit error rate: 73
> Signal strength: 12079
> SNR: 59881
> FE_STATUS: FE_HAS_SIGNAL FE_HAS_LOCK FE_HAS_CARRIER FE_HAS_VITERBI 
> FE_HAS_SYNC
> <transponder type="T" freq="505833000">
> Nothing to read from fd_pat
> Nothing to read from fd_sdt
> </transponder>
> 
> Much the same for dvbtune -i -f 481833.
> 
> > You'll probably have better luck with mplayer and "-vo sdl" or maybe 
> > "-noaspect" and then changing the size settings on your monitor...
> 
> No luck with any of this so far. But this is all Greek to me, so I am 
> probably missing something obvious.
> 
> Cheers,
> 
> Bruno Prior
> 
> 
-- 
Mike Albon <mikea@yuri.org.uk>



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