[USRP-users] CogWave project

Vincent Le Nir vincent.lenir at rma.ac.be
Tue Feb 19 11:21:57 EST 2013

Hi Chenfei,

Thanks for your interest in CogWave. I have removed the spectrum sensing 
tab in the release to lower the weight of the code and to increase the 
speed of the app. I might restore it in a future release if there are 
some interest in it.

For the video source, you could check if the following line is working:

gst-launch-0.10 v4l2src ! 'video/x-raw-yuv, width=352, height=288, 
framerate=5/1' ! ffmpegcolorspace ! queue ! xvimagesink

The same line is used in the video_tx.cpp code. If the line works, then 
you should see the video source in the main window. If not, maybe you 
have to install additional Gstreamer packages, or your webcam does not 
comply with the settings in the line (width=352?, height=288?....). In 
this case, try to change the parameters to see which ones are good for 
your webcam (not too high resolution if you want to keep your framesize 
relatively small).

Let me know if this solved the problem.
Best regards,

On 02/19/2013 12:46 AM, Chenfei Gao wrote:
> Hi all,
> Is anybody using CogWave proposed by Vincent? It's a great project, especially on Cognitive radio platform building. I checkout from git but I found I could only launch the CogWave.pro in qtcreator which showed only a tx/rx main window. I don't know how to launch the main window showing spectrum sensing information as that in demo video. That't one of my questions. Another, where is the video source I should put? Is it coming from webcam or video files located at some place ? Seems that the git version is not the same one in demo video cause it lacks of some functionality. Does anybody have the similar situation?
> Any suggestions would be appreciated.
> Chenfei
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