15 May
2012
15 May
'12
1:11 a.m.
Hi Steve,
I have been playing around for a while now using a few different ubuntu and debian
distributions. So far I've only had success with my 11.04 virtual machines. I took
some wireshark captures of some P25 samples running through Bob's flowgraph in both
debian wheezy and ubuntu 11.04, the "good" capture
(https://docs.google.com/open?id=0B8J3fNC5VR23akJ1Zl9xNkNHeHM) contains exactly what I
would expect with correct NIDs, while the "bad" capture
(https://docs.google.com/open?id=0B8J3fNC5VR23NlA2aGdWVDlHYUE) has packets with NIDs that
are all zero with the occasional 1 in the LSB. From the packets I glanced at, the data
after the NID is the same in each capture.
I have no idea what the differences are in the dependencies between my debian setup and
ubuntu vm, but I have tried building in debian with gcc-4.5 and boost 1.46 (instead of
gcc-4.6 and boost 1.49) and have not had any luck. I have also tried a few versions of
gnuradio (3.4.2, 3.5.3 and 3.6.1) without any luck. Any other ideas to help get it
working or figure out the cause of the problem would be welcome.
Thanks,
Mark
--- In op25-dev(a)yahoogroups.com, Steve Glass <stevie.glass@...> wrote:
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On 14/05/12 13:25, Richard Clarke wrote:
A colleague of mine here has noted that op25 decoder seems to produce
no audio
when compiled and run on anything later than Ubuntu 11.04 for
as yet undetermined reasons. Building and running on 11.10 or later
(other mods required for 12.04) and you end up with the no audio
problem. I've suggested that he post here with any more details he may have
I've used OP25 in different Ubuntu VMs and not had any problem in 11.10.
Shall try 12.04 tonight. I think that I'll set the software decoder to
be the default and that might help. There is a huge todo around the IMBE
vocoder which I've been postponing but I'll start taking a look at that
ASAP.
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