[JdeRobot] Cameraserver

[Oscar Garcia]

El 24/03/15 a las 19:18, shahsahil escribió:
> It is still not working for me. I just get the black screen in cameraview.


Hi again,

Blank screen may be no data (frames) fetched.

For debug purposes could you change this lines of code in 
cameraserver.cpp after line 261[1]?

while(!requests.empty()) {
   std::cout << ".";       /* print a dot every frame served to a client */
   jderobot::AMD_ImageProvider_getImageDataPtr cb = requests.front();
   requests.pop_front();
   cb->ice_response(reply);
}

This will print a dot (.) every frame served to client (cameraview), not 
only every frame.

You can do the same at client side. Add this line after line 47[2] in 
cameraview.cpp:

jderobot::ImageDataPtr data = cprx->getImageData();
std::cout << ".";       /* print a dot every frame received */

If you can see dots in cameraserver and cameraview when black image is 
shown then the problem is the camera, probably due to USB port 
virtualizacion. If there is NOT dots (nor server, nor viewer side) then 
the problem seems to be configuration of ICE endpoints, firewalls or 
something like this.

Have you try to boot on a ubuntu live USB? You can use a 16GB (better 
32BG) with a complete ubuntu instalation (with USB disk partitions) 
without any risk to your current operative system (Windows 7/8?).

If you are afraid about lose your windows system/data you could 
disconnect your hard drive during ubuntu live DVD to USB install (I 
don't ever try to install a patitioned USB from a live USB). If it is a 
hypervisor problem (vmware, virtualbox, xen, ect) this will solve the 
problem and you will have a native test environment better than 
virtualized one.

Best regards.


[1]: 
https://github.com/RoboticsURJC/JdeRobot/blob/master/src/stable/components/cameraserver/cameraserver.cpp#L261
[2]: 
https://github.com/RoboticsURJC/JdeRobot/blob/master/src/stable/components/cameraview/cameraview.cpp#L47
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