43         PLOG(ERROR) << "failed to open device " << deviceName;  in open()
51             PLOG(ERROR) << "failed to get device caps for " << deviceName;  in open()
105         PLOG(ERROR) << "VIDIOC_S_FMT failed";  in open()
122         PLOG(ERROR) << "VIDIOC_G_FMT failed";  in open()
163         PLOG(ERROR) << "VIDIOC_REQBUFS failed";  in startStream()
179             PLOG(ERROR) << "VIDIOC_QUERYBUF failed";  in startStream()
199             PLOG(ERROR) << "mmap() failed";  in startStream()
208             PLOG(ERROR) << "VIDIOC_QBUF failed";  in startStream()
216         PLOG(ERROR) << "VIDIOC_STREAMON failed";  in startStream()
250             PLOG(ERROR) << "VIDIOC_STREAMOFF failed";  in stopStream()
286         PLOG(ERROR) << "VIDIOC_QBUF failed";  in returnFrame()
308             PLOG(ERROR) << "VIDIOC_DQBUF failed";  in collectFrames()
332         PLOG(ERROR) << "Failed to program a parameter value "  in setParameter()
343         PLOG(ERROR) << "Failed to read a parameter value"  in getParameter()
368         PLOG(WARNING) << "Failed to run VIDIOC_QUERYCTRL";  in enumerateCameraControls()