DEBUG( 1252: 0)gstcaps.c(204): gst_caps_debug: : leaving :caps debug
DEBUG( 1252: 0)gstelement.c(1470): gst_element_link_filtered: : linked pad
autoplugger:src_1 to pad video_queue:sink
DEBUG( 1252: 0)gstobject.c(304): gst_object_dispatch_properties_changed: : deep
notification from source to work_thread (location)
DEBUG( 1252: 0)gstobject.c(304): gst_object_dispatch_properties_changed: : deep
notification from source to main_pipeline (location)
DEBUG( 1252: 0)gstelement.c(2103): gst_element_set_state: : [main_pipeline]
setting state from READY to PLAYING
DEBUG( 1252: 0)gstelement.c(2122): gst_element_set_state: : [main_pipeline]
intermediate: setting state from READY to PAUSED
DEBUG( 1252: 0)gstelement.c(2103): gst_element_set_state: : [work_thread]
setting state from READY to PAUSED
DEBUG( 1252: 0)gstelement.c(2148): gst_element_set_state: : [work_thread]
element claimed state-change success,but state didn't change READY, PAUSED
<-> PAUSED
DEBUG( 1252: 0)gstbin.c(618): gst_bin_change_state: : child 'work_thread'
failed to go to state 4(PAUSED)
DEBUG( 1252: 0)gstelement.c(2103): gst_element_set_state: : [work_thread]
setting state from READY to READY
DEBUG( 1252: 0)gstelement.c(2148): gst_element_set_state: : [main_pipeline]
element claimed state-change success,but state didn't change READY,
NONE_PENDING <-> PAUSED