0:00:02.917203182 18885  0x8da4fd8 WARN                  v4l2 v4l2_calls.c:257:gst_v4l2_fill_lists:<video_source> error: Failed getting controls attributes on device '/dev/video0.'
0:00:02.917221012 18885  0x8da4fd8 WARN                  v4l2 v4l2_calls.c:257:gst_v4l2_fill_lists:<video_source> error: Failed querying control 9963776 on device '/dev/video0'. (5 - Input/output error)
0:00:02.917255402 18885  0x8da4fd8 INFO      GST_ERROR_SYSTEM gstelement.c:1675:gst_element_message_full:<video_source> posting message: Failed getting controls attributes on device '/dev/video0.'
0:00:02.917322604 18885  0x8da4fd8 INFO      GST_ERROR_SYSTEM gstelement.c:1698:gst_element_message_full:<video_source> posted error message: Failed getting controls attributes on device '/dev/video0.'
0:00:02.917348718 18885  0x8da4fd8 WARN               basesrc gstbasesrc.c:2622:gst_base_src_activate_push:<video_source> Failed to start in push mode
0:00:02.917361757 18885  0x8da4fd8 INFO              GST_PADS gstpad.c:929:gst_pad_activate_push:<video_source:src> failed to activate in push mode
0:00:02.917373314 18885  0x8da4fd8 WARN              GST_PADS gstpad.c:687:gst_pad_set_active:<video_source:src> Failed to activate pad
0:00:02.917385610 18885  0x8da4fd8 INFO            GST_STATES gstelement.c:2434:gst_element_change_state:<video_source> have FAILURE change_state return
0:00:02.917396773 18885  0x8da4fd8 INFO            GST_STATES gstelement.c:2044:gst_element_abort_state:<video_source> aborting state from READY to PAUSED
0:00:02.917408327 18885  0x8da4fd8 INFO            GST_STATES gstbin.c:2208:gst_bin_change_state_func:<bin1> child 'video_source' failed to go to state 3(PAUSED)