Patric wrote:
> Hi,
>
> I am currently planning to writing some minimalistic app or script to
> scan for channels. It should have the functionality that xawtv's "scantv
> -a" has, but without all the dep's that xawtv brings. (going to be used
> on a embedded PVR system)
>
> So my questions is, how can i/is it possible to detect the current
> reception strenght? (pointers to the driver-code are welcome too)
>
> Ideas or feature-requests are welcome :)
>
> Some ideas that i have on the list:
> - Detect what cable-network it is and generate correct chan-names for
> xmltv (compare the chan-list with a supplied db or connect to a server)
> - Update of mythtv/freevo chan-list if channels has been added or removed.
> - Logo-detection to detect unknown channels (a big maybe)
>
>
> Regards,
> Patric
>
>
> Some info about the PVR-150 card
>
>
<snip>
Patric,
I'm not a programmer, but while tuned into an RF station, and I type
ivtvctl -Z, I get some information about the current channel.
I have included the commands I use to change channels. This works on my
PVR-250 retail as well as a PVR-150 retail. I haven't tried any others.
[EMAIL PROTECTED] ~]$ ivtv-tune -c 5
/dev/video0: 77.250 MHz (Signal Detected)
[EMAIL PROTECTED] ~]$ ivtvctl -Z
ioctl VIDIOC_G_TUNER ok
frequency range: 44.0 MHz - 958.0 MHz
signal strength: 100%
current audio mode : 1
(stereo 1, lang1 3, lang2 2, mono 0)
available subchannels: 0x1
(stereo 0x2, lang1 0x8, lang2 0x4, mono 0x1)
[EMAIL PROTECTED] ~]$ ivtv-tune -c 9
/dev/video0: 187.250 MHz (Signal Detected)
[EMAIL PROTECTED] ~]$ ivtvctl -Z
ioctl VIDIOC_G_TUNER ok
frequency range: 44.0 MHz - 958.0 MHz
signal strength: 100%
current audio mode : 1
(stereo 1, lang1 3, lang2 2, mono 0)
available subchannels: 0xe
(stereo 0x2, lang1 0x8, lang2 0x4, mono 0x1)
The signal strength seems to be more of a true/false than a %. These two
channels are all I get using a cheap rabbit ear set, and I'd call them
both about 60%
HTH
Richard Woelk.
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