[op25-dev] Re: GRC blocks for OP25 and 4FSK missing

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markop25 cottrell.m.a at gmail.com
Tue May 15 01:11:52 UTC 2012

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.


--- In op25-dev at yahoogroups.com, Steve Glass <stevie.glass at ...> wrote:
> Hash: SHA1
> 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
> Version: GnuPG v1.4.12 (GNU/Linux)
> Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/
> iEYEARECAAYFAk+wf6wACgkQW7aAm65EWy4m9ACfeKcxeKLzlAttUm/btm5gICT0
> OdwAoNgc8sOx+KDvK1JSpf7PQmWMyLfQ
> =MufF

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