fail to receive GST_MESSAGE_STATE_CHANGED (GST_STATE_NULL) of pipeline, but all receive the msg for all its children
Halley Zhao
aihua.halley.zhao at gmail.com
Wed May 8 02:28:49 UTC 2019
export GST_DEBUG=*:4
there is gst log"<my_pipeline> notifying about state-changed READY to NULL
(VOID_PENDING pending)", but no msg got on GstBus
here are the log:
(bus_call, 84)my_pipeline state change, old state: PLAYING, new state:
PAUSED
0:00:05.294249625 12094 0xebc8600 INFO GST_STATES
gstelement.c:2658:gst_element_continue_state:<my_pipeline> continue state
change PAUSED to READY, final NULL
0:00:05.294405000 12094 0xebc8600 INFO GST_STATES
gstbin.c:2504:gst_bin_element_set_state:<my_sink> current PAUSED pending
VOID_PENDING, desired next READY
0:00:05.294566500 12094 0xebc8600 INFO GST_STATES
gstelement.c:2676:gst_element_continue_state:<my_sink> completed state
change to READY
0:00:05.294626250 12094 0xebc8600 INFO GST_STATES
gstelement.c:2579:_priv_gst_element_state_changed:<my_sink> notifying about
state-changed PAUSED to READY (VOID_PENDING pending)
(bus_call, 84)my_sink state change, old state: PAUSED, new state: READY
0:00:05.294731000 12094 0xebc8600 INFO GST_STATES
gstbin.c:2952:gst_bin_change_state_func:<my_pipeline> child 'my_sink'
changed state to 2(READY) successfully
0:00:05.294849875 12094 0xebc8600 INFO GST_STATES
gstbin.c:2504:gst_bin_element_set_state:<my_vdec> current PAUSED pending
VOID_PENDING, desired next READY
0:00:05.317103625 12094 0xebc8600 INFO GST_STATES
gstelement.c:2676:gst_element_continue_state:<my_vdec> completed state
change to READY
0:00:05.317294250 12094 0xebc8600 INFO GST_STATES
gstelement.c:2579:_priv_gst_element_state_changed:<my_vdec> notifying about
state-changed PAUSED to READY (VOID_PENDING pending)
0:00:05.317593875 12094 0xebc8600 INFO GST_STATES
gstbin.c:2952:gst_bin_change_state_func:<my_pipeline> child 'my_vdec'
changed state to 2(READY) successfully
(bus_call, 84)my_vdec state change, old state: PAUSED, new state: READY
0:00:05.317717375 12094 0xebc8600 INFO GST_STATES
gstbin.c:2504:gst_bin_element_set_state:<my_h264parse> current PAUSED
pending VOID_PENDING, desired next READY
0:00:05.318214875 12094 0xebc8600 INFO GST_STATES
gstelement.c:2676:gst_element_continue_state:<my_h264parse> completed state
change to READY
0:00:05.318281375 12094 0xebc8600 INFO GST_STATES
gstelement.c:2579:_priv_gst_element_state_changed:<my_h264parse> notifying
about state-changed PAUSED to READY (VOID_PENDING pending)
(bus_call, 84)my_h264parse state change, old state: PAUSED, new state: READY
0:00:05.318393875 12094 0xebc8600 INFO GST_STATES
gstbin.c:2952:gst_bin_change_state_func:<my_pipeline> child 'my_h264parse'
changed state to 2(READY) successfully
0:00:05.318517750 12094 0xebc8600 INFO GST_STATES
gstbin.c:2504:gst_bin_element_set_state:<my_appsrc> current PAUSED pending
VOID_PENDING, desired next READY
0:00:05.318673500 12094 0xed408a0 INFO task
gsttask.c:318:gst_task_func:<my_appsrc:src> Task resume from paused
0:00:05.319093500 12094 0xebc8600 INFO GST_STATES
gstelement.c:2676:gst_element_continue_state:<my_appsrc> completed state
change to READY
0:00:05.319155625 12094 0xebc8600 INFO GST_STATES
gstelement.c:2579:_priv_gst_element_state_changed:<my_appsrc> notifying
about state-changed PAUSED to READY (VOID_PENDING pending)
(bus_call, 84)my_appsrc state change, old state: PAUSED, new state: READY
0:00:05.319267375 12094 0xebc8600 INFO GST_STATES
gstbin.c:2952:gst_bin_change_state_func:<my_pipeline> child 'my_appsrc'
changed state to 2(READY) successfully
0:00:05.319451375 12094 0xebc8600 INFO GST_STATES
gstelement.c:2651:gst_element_continue_state:<my_pipeline> committing state
from PAUSED to READY, pending NULL, next NULL
0:00:05.319526500 12094 0xebc8600 INFO GST_STATES
gstelement.c:2579:_priv_gst_element_state_changed:<my_pipeline> notifying
about state-changed PAUSED to READY (NULL pending)
(bus_call, 84)my_pipeline state change, old state: PAUSED, new state: READY
0:00:05.319628625 12094 0xebc8600 INFO GST_STATES
gstelement.c:2658:gst_element_continue_state:<my_pipeline> continue state
change READY to NULL, final NULL
0:00:05.319799625 12094 0xebc8600 INFO GST_STATES
gstbin.c:2504:gst_bin_element_set_state:<my_sink> current READY pending
VOID_PENDING, desired next NULL
0:00:06.443495875 12094 0xebc8600 INFO GST_STATES
gstelement.c:2676:gst_element_continue_state:<my_sink> completed state
change to NULL
0:00:06.443610625 12094 0xebc8600 INFO GST_STATES
gstelement.c:2579:_priv_gst_element_state_changed:<my_sink> notifying about
state-changed READY to NULL (VOID_PENDING pending)
0:00:06.443782875 12094 0xebc8600 INFO GST_STATES
gstbin.c:2952:gst_bin_change_state_func:<my_pipeline> child 'my_sink'
changed state to 1(NULL) successfully
(bus_call, 84)my_sink state change, old state: READY, new state: NULL
0:00:06.443899625 12094 0xebc8600 INFO GST_STATES
gstbin.c:2504:gst_bin_element_set_state:<my_vdec> current READY pending
VOID_PENDING, desired next NULL
0:00:06.450190250 12094 0xebc8600 INFO GST_STATES
gstelement.c:2676:gst_element_continue_state:<my_vdec> completed state
change to NULL
0:00:06.450258625 12094 0xebc8600 INFO GST_STATES
gstelement.c:2579:_priv_gst_element_state_changed:<my_vdec> notifying about
state-changed READY to NULL (VOID_PENDING pending)
(bus_call, 84)my_vdec state change, old state: READY, new state: NULL
0:00:06.450385750 12094 0xebc8600 INFO GST_STATES
gstbin.c:2952:gst_bin_change_state_func:<my_pipeline> child 'my_vdec'
changed state to 1(NULL) successfully
0:00:06.450535125 12094 0xebc8600 INFO GST_STATES
gstbin.c:2504:gst_bin_element_set_state:<my_h264parse> current READY
pending VOID_PENDING, desired next NULL
0:00:06.450629625 12094 0xebc8600 INFO GST_STATES
gstelement.c:2676:gst_element_continue_state:<my_h264parse> completed state
change to NULL
0:00:06.450687375 12094 0xebc8600 INFO GST_STATES
gstelement.c:2579:_priv_gst_element_state_changed:<my_h264parse> notifying
about state-changed READY to NULL (VOID_PENDING pending)
(bus_call, 84)my_h264parse state change, old state: READY, new state: NULL
0:00:06.450794500 12094 0xebc8600 INFO GST_STATES
gstbin.c:2952:gst_bin_change_state_func:<my_pipeline> child 'my_h264parse'
changed state to 1(NULL) successfully
0:00:06.450913125 12094 0xebc8600 INFO GST_STATES
gstbin.c:2504:gst_bin_element_set_state:<my_appsrc> current READY pending
VOID_PENDING, desired next NULL
0:00:06.451000500 12094 0xebc8600 INFO GST_STATES
gstelement.c:2676:gst_element_continue_state:<my_appsrc> completed state
change to NULL
0:00:06.451056625 12094 0xebc8600 INFO GST_STATES
gstelement.c:2579:_priv_gst_element_state_changed:<my_appsrc> notifying
about state-changed READY to NULL (VOID_PENDING pending)
(bus_call, 84)my_appsrc state change, old state: READY, new state: NULL
0:00:06.451159125 12094 0xebc8600 INFO GST_STATES
gstbin.c:2952:gst_bin_change_state_func:<my_pipeline> child 'my_appsrc'
changed state to 1(NULL) successfully
0:00:06.451296000 12094 0xebc8600 INFO GST_STATES
gstelement.c:2676:gst_element_continue_state:<my_pipeline> completed state
change to NULL
0:00:06.451355500 12094 0xebc8600 INFO GST_STATES
gstelement.c:2579:_priv_gst_element_state_changed:<my_pipeline> notifying
about state-changed READY to NULL (VOID_PENDING pending)
(main, 282)unref the pipeline
Halley Zhao <aihua.halley.zhao at gmail.com> 于2019年5月8日周三 上午10:05写道：
> Hi experts:
> I want to do cleanup after pipeline changed to GST_STATE_NULL. however I
> received GST_MESSAGE_STATE_CHANGED with newstate of GST_STATE_NULL of its
> children element, but not the pipeline itself.
>
> I don't know whether there is something wrong in my code, or it is by
> design?
> my pipeline contains "appsrc-->h264parse-->videodecode-->appsink". here is
> my log:
> the source code sees attachment
>
> (cb_need_data, 148)emit eos signal
> (bus_call, 61)End of stream
>
> (bus_call, 84)my_sink state change, old state: PLAYING, new state: PAUSED
> (bus_call, 84)my_vdec state change, old state: PLAYING, new state: PAUSED
> (bus_call, 84)my_h264parse state change, old state: PLAYING, new state:
> PAUSED
> (bus_call, 84)my_appsrc state change, old state: PLAYING, new state: PAUSED
> (bus_call, 84)my_pipeline state change, old state: PLAYING, new state:
> PAUSED
> (bus_call, 84)my_sink state change, old state: PAUSED, new state: READY
> (bus_call, 84)my_vdec state change, old state: PAUSED, new state: READY
> (bus_call, 84)my_h264parse state change, old state: PAUSED, new state:
> READY
> (bus_call, 84)my_appsrc state change, old state: PAUSED, new state: READY
> (bus_call, 84)my_pipeline state change, old state: PAUSED, new state: READY
> (bus_call, 84)my_sink state change, old state: READY, new state: NULL
> (bus_call, 84)my_vdec state change, old state: READY, new state: NULL
>
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