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once_the_start_recording_button_is_pressed_a_countdown_will_begin_as_indicated_by_the_status_bar_at_the_bottom_of_the_dialog_and_then_the_data_collection_will_start._when_recording_starts_the_status_bar_then_indicates_the_progress_of_the_recording_and_the_number_of_frames_recorded._capture_trails.png_in_this_figure_the_marker_trails_have_been_turned_on._this_is_a_useful_feature_when_capturing_the_calibration_trial_because_it_provides_a_quick_overview_of_the_coverage_of_the_wand_through_the_view_of_each_camera._in_this_example_camera_12_will_likely_not_calibrate_well_because_the_wand_has_not_covered_a_sufficient_region_of_the_viewer
