[linux-dvb] Re: Newbie questions

[Bruno Prior <bruno@rpgd.uklinux.net>]

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





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