[linux-dvb] Low symbol rates on FF DVB cards
Klaus.Schmidinger at cadsoft.de
Sat Dec 3 14:30:30 CET 2005
Full featured DVB cards (Siemens/Technotrend AV7110 design)
apparently have trouble with receiving channels at very low
symbol rates. An example is
TVS Teleport Bonn;DMV:11535:vC34:S1.0W:5632:308+8190:256=eng,257=eng:0:2:1:65535:1:0
with a symbol rate of 5632 (that transponder isn't always on, though).
My FF DVB card can't receive this channel, so I have to receive it
with a budget card, which is able to handle this symbol rate.
In order to automate this I tried getting the dvb_frontend_info
and checked its symbol_rate_min, hoping that I could use this
to find out whether a given device could receive a channel with
a given symbol rate.
Unfortunately both my FF card and my budget card report the same
minimum symbol rate:
name Alps BSRV2
name STV0299/TSA5059/SL1935 based
So I'm afraid I can't use this to make that decision.
Is there anything else I could use, or do I just have to
check for the existence of a video and audio device (which
indicates that there is an MPEG decoder) and in that case
refuse to switch to a channel with a symbol rate of, say,
less than 10000 (in VDR's channels.conf notation)?
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