[linux-dvb] Finding in-the-clear digital cable channels: a fewquestions.

Nico Sabbi nsabbi at email.it
Fri Oct 21 17:28:44 CEST 2005

Luis Ochoa wrote:

>Hi all,
>I finally got my FusionHDTV5 Lite working (thanks Mike Krufky, et.al.)
>and the first thing I wanted to do was trying to find out what digital
>cable channels I can receive in my house.
>After doing a lot of reading and a few tests, I have a few questions.
>I found somewhere here, a list (actually 5 lists) of cable
>frequencies. I concat'ed them all together and fed them to "atscscan
>-A2 cable-freq-file" and this found about about 48 services, like:
>My first question is, what does each portion of a line mean?

frequency, modulation type, video pid, audio pid, something else.
None of those channels contains a video pid (0)

>I think the first item is the channel "name" (which atscscan sets to
>the same as the last item), but what is this number?
>I know the second entity is the freq, and QAM_256 is of course the
>modulation, but what are the rest of the numbers?
>I saved all these to ~/.azap/channels.conf , changed the first item
>from say [0003] to say "c1" and proceded to try to azap.
>I wanted to use mplayer, and I read I had to do "azap -r", but don't know why.
>What does the -r option do?

read the video.xml file in mplayer's DOCS dir

>this is what I get:
>azap -r c1
>using '/dev/dvb/adapter0/frontend0' and '/dev/dvb/adapter0/demux0'
>tuning to 621012500 Hz
>video pid 0x0000, audio pid 0x0211
>status 00 | signal 0000 | snr 0000 | ber 00000000 | unc 0000ffff |
>status 1f | signal 0000 | snr feb6 | ber 00000000 | unc 0000ffff | FE_HAS_LOCK
>status 1f | signal 0000 | snr feb4 | ber 00000000 | unc 00000000 | FE_HAS_LOCK
>status 1f | signal 0000 | snr febb | ber 00000000 | unc 00000000 | FE_HAS_LOCK
>status 1f | signal 0000 | snr feba | ber 00000000 | unc 00000000 | FE_HAS_LOCK
>status 1f | signal 0000 | snr febd | ber 00000000 | unc 00000000 | FE_HAS_LOCK
>status 1f | signal 0000 | snr febb | ber 00000000 | unc 00000000 | FE_HAS_LOCK
>status 1f | signal 0000 | snr fec1 | ber 00000000 | unc 00000000 | FE_HAS_LOCK
>Looks good by what I've read, if you care to comment on the portions
>of each individual line, please do so. I know the signal is always
>zero because the author of the driver is making it so, as he's not
>happy with the number he's getting from the card/driver (or something
>like that).
>Finally, I found another thread suggesting how to use mplayer, so I do:
>mplayer /dev/dvb/adapter0/dvr0 -tskeepbroken -cache 8192

there are easier ways to use mplayer

>and I get:
>MPlayer 1.0pre7try2-3.2.3 (C) 2000-2005 MPlayer Team
>CPU: Intel Pentium 4/Xeon/Celeron Foster (Family: 8, Stepping: 4)
>Detected cache-line size is 64 bytes
>CPUflags:  MMX: 1 MMX2: 1 3DNow: 0 3DNow2: 0 SSE: 1 SSE2: 1
>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 to open LIRC support.
>You will not be able to use your remote control.
>Playing /dev/dvb/adapter0/dvr0.
>Cache fill: 19.92% (1671168 bytes)    Win32 LoadLibrary failed to
>load: avisynth.dll, /usr/lib/win32/avisynth.dll,
>TS file format detected.
>PROBING UP TO 2000000, PROG: 0
>NO VIDEO! AUDIO A52(pid=17) NO SUBS (yet)!  PROGRAM N. 0

^^^^^^ because of vpid=0




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