Hi people,my name is Camilo im student of Systems Engineering at Universidad Catolica de Colombia http://mi.eng.cam.ac.uk/~er258/cvd/ , im currently working on a project based on PTAM http://www.robots.ox.ac.uk/~gk/PTAM/, im tryng to have control of my cam but i can not do it, there is the following code to control video source using v4l2 like this (the project use this libraries in here for computer vision http://mi.eng.cam.ac.uk/~er258/cvd/) // Copyright 2008 Isis Innovation Limited #include "VideoSource.h" #include <cvd/Linux/v4lbuffer.h> #include <cvd/colourspace_convert.h> #include <cvd/colourspaces.h> #include <gvars3/instances.h> namespace PTAMM { using namespace CVD; using namespace std; using namespace GVars3; VideoSource::VideoSource() { cout << " VideoSource_Linux: Opening video source..." << endl; string QuickCamFile = GV3::get<string>("VideoSource.V4LDevice", "/dev/video0"); ImageRef irSize = GV3::get<ImageRef>("VideoSource.Resolution", ImageRef(1600,1200)); int nFrameRate = GV3::get<int>("VideoSource.Framerate", 30); V4LBuffer<yuv422>* pvb = new V4LBuffer<yuv422>(QuickCamFile, irSize, -1, false, nFrameRate); mirSize = pvb->size(); mptr = pvb; cout << " ... got video source." << endl; }; ImageRef VideoSource::Size() { return mirSize; }; void VideoSource::GetAndFillFrameBWandRGB(Image<byte> &imBW, Image<Rgb<byte> > &imRGB) { V4LBuffer<yuv422>* pvb = (V4LBuffer<yuv422>*) mptr; VideoFrame<yuv422> *pVidFrame = pvb->get_frame(); convert_image(*pVidFrame, imBW); convert_image(*pVidFrame, imRGB); pvb->put_frame(pVidFrame); }} but i dont have control of camera paremeters i change resolution but i dont get any result, im beginner with this so im kind of lost, this app start video using opengl window, but when i try to maximize window i lose resolution, do you have any ideas so i can control cam paremeters, camera has a lot of features as you can see in here http://www.logitech.com/en-us/webcam-communications/webcams/devices/6333, thanks for any help you people can give me, please forgive me for poor details on specifications for what i need, but i dont know what else to explain about my situation, i was tryng to read methods for V4LBuffer<yuv422>, but i dont find a way to change camera parameters. thanks in advance att: Camilo Soto -- video4linux-list mailing list Unsubscribe mailto:video4linux-list-request@xxxxxxxxxx?subject=unsubscribe https://www.redhat.com/mailman/listinfo/video4linux-list