sending events upstream to gstreamer queue

[John Vetter]

Hi,

 

I'm a newbie to gstreamer.

 

I'm having trouble with sending events from a downstream plugin to a gstreamer queue element.

 

During the link, the downstream element sends a custom event, but the source pad of the queue is in the flushing state:

 

GST_EVENT gstpad.c:5182:gst_pad_send_event_unchecked:<my_queue:src> Received event on flushing pad. Discarding

 

I tried the standard plugins with gst-launch and I find  similar result. The src pad on the queue is in a flushing state and cannot process events.

 

Could somebody be good enough to tell me how I can send events from a downstream unit to a queue?

 

gst-launch-1.0 filesrc location=song.ogg ! decodebin ! tee name=t ! queue ! audioconvert

 

0:00:02.716548147 23194 0xb88f4400 DEBUG               GST_CAPS gstpad.c:2106:gst_pad_link_check_compatible_unlocked: caps are compatible
0:00:02.716585035 23194 0xb88f4400 INFO                GST_PADS gstpad.c:2388:gst_pad_link_full: linked queue0:src and audioconvert0:sink, successful
0:00:02.716633961 23194 0xb88f4400 INFO               GST_EVENT gstevent.c:1373:gst_event_new_reconfigure: creating reconfigure event
0:00:02.716666480 23194 0xb88f4400 DEBUG              GST_EVENT gstevent.c:301:gst_event_new_custom: creating new event 0xb88fbf88 reconfigure 61441
0:00:02.716706961 23194 0xb88f4400 DEBUG              GST_EVENT gstpad.c:5092:gst_pad_send_event_unchecked:<queue0:src> have event type reconfigure event: 0xb88fbf88, time 99:99:99.999999999, seq-num 8, (NULL)
0:00:02.716748628 23194 0xb88f4400 INFO               GST_EVENT gstpad.c:5182:gst_pad_send_event_unchecked:<queue0:src> Received event on flushing pad. Discarding

 

Thanks,

John

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[Sebastian Dröge-3]

On Do, 2016-05-19 at 23:40 +0200, John Vetter wrote:

> Hi,
>  
> I'm a newbie to gstreamer.
>  
> I'm having trouble with sending events from a downstream plugin to a
> gstreamer queue element.
>  
> During the link, the downstream element sends a custom event, but the
> source pad of the queue is in the flushing state:
>  
> GST_EVENT gstpad.c:5182:gst_pad_send_event_unchecked:<my_queue:src>
> Received event on flushing pad. Discarding
>  
> I tried the standard plugins with gst-launch and I find  similar
> result. The src pad on the queue is in a flushing state and cannot
> process events.
>  
> Could somebody be good enough to tell me how I can send events from a
> downstream unit to a queue?

This most likely means that the queue is not in PAUSED/PLAYING state
yet, or more specific that its source pad is not activated yet.

Before events are accepted you need to do that. 

--
Sebastian Dröge, Centricular Ltd · http://www.centricular.com


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