OpenViBE forum

the header files should be in the vrpn directory where you have downloaded the OpenViBE dependencies just before starting the compilation process. maybe you just work with the binaries of OpenViBE and you do not have the source files in this case you can get them with git from http://www.cs.unc.edu/...

I guess by using one of the standard IO libraries

http://www.cplusplus.com/doc/tutorial/files/
http://www.cplusplus.com/reference/clib ... o/fprintf/

Hope this helps,
Dieter

Hi, Ok as it is a draft script, I have not yet included certain checks, but each input actually expects a 1-channel signal (ERP on one channel). Maybe this is the cause of the error? I included the scenario I used for testing, sorry for not doing that earlier. With this scenario I had no trouble (ex...

Hi, First of all, I'm very happy with the python box in OpenViBE. I think it will make the life of some researchers a bit easier. For some external experiments I was asked to create a display that shows the target and non-target ERP's in a superimposed fashion, instead of using OpenViBE's display bo...

Hi, Maybe the last stimulation that should trigger the training is not in the recorded file. Try to change the train trigger to OVTK_StimulationId_ExperimentStop or OVTK_StimulationId_Train in csp spatial filter trainer box. The other error should be solved once you computed the spatial filter on yo...

Thanks for your answer, so it is possible to change the priorities of the boxes or are these just dummy values in the xml file that are never used? However, what I do not understand then is how the scheduling can change each time a scenario is opened (as stated above in one of Yann's posts) as the p...

Oops, my mistake, it didn't like the .patch extension

Here is the output of the processing [ INF ] At time 0.000 sec <Box algorithm::Matlab filter> >> OpenViBE called bci_Initialize2 function PTB-INFO: Display ':0.0' : X-Screen 0 : Output 0 [default]: Unknown output priority : Connected : CRTC 0 [XID 351] PTB-INFO: Display ':0.0' : X-Screen 0 : Assigni...

Btw, look at the TRACE messages when you start a scenario, you'll have the scheduling printed, with box priorities etc. I wanted to check the priorities assigned to each box today, but I can't seem to find it when setting the log level to trace. Has this been changed, or can I find it elsewhere? Di...

So a future OpenViBE feature would be to start the clock only when all boxes are initialized? Anyway I could live with the fact that I have to wait until the scenario catches up, but herein lies my problem, it does not catch up. Instead time starts to go very very slow, as in a couple of millisecond...

Hi, Apparently the box still contains a small bug. We concatenated the same file multiple times and we saw a delay in the output of the concatenated file that was equal to the block size. This happens because the m_ui32HeaderReceivedCount is sometimes still lower than half the number of inputs, whil...

1. Is it possible to obtain current date\time as date vector in OpenVibe, aka code "clock" in Matlab? I'm not sure, but I don't think so, everything you need to know about the time format in OpenViBE is discussed nicely in this post of Y. Renard http://stickyvibe.tuxfamily.org/blog/?p=121 2. I have...

I have never used the matrix display before, but I have used the accuracy box before and that should work.

I just took a look at the graz visualisation box and I don't think it is possible to give continuous feedback in the four directions, for this the box should be extended. Recording of the four directions should be possible, maybe one could give discrete feedback in the four directions with the curre...

You could connect the features of class left to the first feature input of the classifier trainer, then connect the features of the multiplexed up/left trials to the second feature input of the classifier trainer. Actually the one-versus-one approach as you described it for the three-class case will...