looking into the "invalid sample rate" issue, from your screen print we see
"Invalid sample rate: 320000 Hz"
it initially appears to be coming from this code in src/librtlsdr.c:
/* check if the rate is supported by the resampler */
if ((samp_rate <= 225000) || (samp_rate > 3200000) ||
((samp_rate > 300000) && (samp_rate <= 900000))) {
fprintf(stderr, "Invalid sample rate: %u Hz\n", samp_rate);
return -EINVAL;
}
which simply indicates that 320,000 isn't allowed.
In your command you had -s 1000000 - it's easy to miss (I missed several times) but in
OP25 the "S" needs to be capitalized!!!!!
Also, to eliminate OP25, you can retry using the CLI program "osmocom_fft -s
1000000". It should be possible to get at least as far as the spectrum showing
reception of the trunk CC....
Max