orbslam2 Framebuffer with requested attributes not available QObject::startTimer: Timers

orbslam2 Framebuffer with requested attributes not available. Using available framebuffer. You may see visual artifacts.QObject::startTimer: Timers cannot be started from another thread

myvideo.cpp中注释掉cv.wait(30)
删除./build ./thirdparty/g20和dbow2的bulid文件夹
sh build.sh重新编译
运行./myvideo.cpp

Framebuffer with requested不知道为啥还在,放弃了