Hi,
this are some trivial zapping applications explaining how to use the frontend
and demux API. They are also pretty useful to test your hardware.
For DVB-S, Astra Channel config file:
$ ./szap -c channels-conf/dvb-s/Astra-19.2E n24
will tune to N24. For DVB-C, Berlin Cable channel config:
$ ./czap -c channels-conf/dvb-c/de-Berlin Arte
For DVB-T, Berlin Config:
$ ./tzap -c channels-conf/dvb-t/de-Berlin phoenix
For ATSC, Raleigh Durham Config:
$ ./azap -c channels-conf/atsc/us-Raleigh-Durham WRAL
will tune to WRAL's Digital Channel 5-1.
By default the MPEG stream is routed to a hardware decoder. If you want to
record the stream to disk you will route it to the DVR device by using the
'-r' option:
$ ./tzap -c channels-conf/dvb-t/de-Berlin phoenix -r
[keep it running in one console]
$ cat /dev/dvb/adapter0/dvr0 > /tmp/recording.ts
[in a second console, will dump the MPEG transport stream to /tmp/recording.ts]
The status messages have the following meaning:
status 0x1f --- The demodulator status bits.
0x1f means all bits set, everything ok.
signal [0x0000...0xffff] --- Signal Strength. Values above 0x8000 should be ok.
snr [0x0000...0xffff] --- Signal/Noise Ratio. Values above 0x8000 are ok.
ber [0...0xffffffff] --- Bit Error Rate. The less the better.
unc [0...0xffffffff] --- Number of Uncorrectable Blocks.
Small numbers are Preferable.
If everything is alright and all frontend circuits are working stable
(are locked) you should see a FE_HAS_LOCK in the rightmost line.
Good luck,
Holger
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