startCapture       43 media/video/capture/mac/platform_video_capturing_mac.h - (BOOL)startCapture;
startCapture      113 media/video/capture/mac/video_capture_device_avfoundation_mac.h - (BOOL)startCapture;
startCapture       58 media/video/capture/mac/video_capture_device_qtkit_mac.h - (BOOL)startCapture;