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output-selector

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gtissington
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output-selector

gtissington
Hello,

I've looked through all the references I can find related to output-selector - including output-selector-tests.c.  I still cannot get it to work.

I'm using this pipline

videotestsrc is-live=true num-buffers=30 !
ffmpegcolorspace !
timeoverlay !
ffmpegcolorspace !
output-selector name=os 
os. ! queue ! ffmpegcolorspace ! autovideosink 
os. ! queue ! ffmpegcolorspace ! autovideosink



after the pipeline is assembled I issue 


g_object_get (G_OBJECT (sel), "active-pad", &srcpad1, NULL);

and

gst_element_set_state (pipeline, GST_STATE_PLAYING);

Everything works fine if I take the output selector out.  However, with the output-selector there one videosink is displayed but the video is not updates.  just a static snap shot.  After num-buffers=30 expires the pipeline end. and the application closes normally.  So, the clock appears to be running, one frame got through to the sink but no more.

Interestingly if I change num-buffers to 90 then the program hangs and does not exit after 3 seconds as expected.  Does this mean the queue is full?

Any ideas?

Anyone know a real world example where output-selector is being used. 

Thanks,

Garth Tissington
250 891 4797
---

Given sufficient thrust pigs fly just fine.


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Stefan Sauer
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Re: output-selector

Stefan Sauer
On 04/05/2012 06:55 AM, Garth Tissington wrote:
Hello,

I've looked through all the references I can find related to output-selector - including output-selector-tests.c.  I still cannot get it to work.

I'm using this pipline

videotestsrc is-live=true num-buffers=30 !
ffmpegcolorspace !
timeoverlay !
ffmpegcolorspace !
output-selector name=os 
os. ! queue ! ffmpegcolorspace ! autovideosink 
os. ! queue ! ffmpegcolorspace ! autovideosink



after the pipeline is assembled I issue 


g_object_get (G_OBJECT (sel), "active-pad", &srcpad1, NULL);


and

          
gst_element_set_state (pipeline, GST_STATE_PLAYING);



        

        


          

        
Everything works fine if I take the output selector
            out.  However, with the output-selector there one videosink
            is displayed but the video is not updates.  just a static
            snap shot.  After num-buffers=30 expires the pipeline end.
            and the application closes normally.  So, the clock appears
            to be running, one frame got through to the sink but no
            more.

      

    

    My gut feeling is that the sinks wait for prereoll buffers, which
    they should not as you use a livesrc, could you 

    1.) try that with a v4l2src

    2.) try sync=false on the sinks?

    This is just to narrow it down. Also run your app with
    GST_DEBUG="*:2" to check if gstreamer posts some warnings.

    

    Stefan

    

      

        


          

        
Interestingly if I change num-buffers to 90 then the
            program hangs and does not exit after 3 seconds as expected.
             Does this mean the queue is full?

        


          

        
Any ideas?

        


          

        
Anyone know a real world example where
            output-selector is being used. 

        


          

        
Thanks,

        


          

        
Garth Tissington
          

            
250 891 4797

            
---

            

              


              

              
Given sufficient thrust pigs fly just fine.

            

          

          

        

      

      

_______________________________________________
gstreamer-devel mailing list
[hidden email]
http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel


    

    

  


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					Hector Canto
				

				

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		Re: output-selector
	

				

			

		

		

			

				
					

		

			Hector Canto

	
	
		

	

	
	
	

	
						
				
					
	
	

		Could it be related with the unactive branch, no data is flowing through it and that may cause the hanging.

If you remove the branch it work fine, isn't it?




2012/4/5 Stefan Sauer <[hidden email]>




  
    
  
  

    On 04/05/2012 06:55 AM, Garth Tissington wrote:
    

      
Hello,
        


          

        
I've looked through all the references I can find
            related to output-selector - including
            output-selector-tests.c.  I still cannot get it to work.

        


          

        
I'm using this pipline

        


          

        
videotestsrc
              is-live=true num-buffers=30 !

        
 ffmpegcolorspace !



        
 timeoverlay !



        

          
              ffmpegcolorspace !

             output-selector name=os 

        
 os. ! queue ! ffmpegcolorspace !
              autovideosink 

        
 os.
              ! queue ! ffmpegcolorspace !
            autovideosink

        


          

        


        

        


        

        
after the pipeline is assembled I issue 

        


        

        


        

        

          
g_object_get (G_OBJECT (sel), "active-pad", &srcpad1, NULL);

          



          
and

          

          
gst_element_set_state (pipeline, GST_STATE_PLAYING);





        

        


          

        
Everything works fine if I take the output selector
            out.  However, with the output-selector there one videosink
            is displayed but the video is not updates.  just a static
            snap shot.  After num-buffers=30 expires the pipeline end.
            and the application closes normally.  So, the clock appears
            to be running, one frame got through to the sink but no
            more.

      

    

    My gut feeling is that the sinks wait for prereoll buffers, which
    they should not as you use a livesrc, could you 

    1.) try that with a v4l2src

    2.) try sync=false on the sinks?

    This is just to narrow it down. Also run your app with
    GST_DEBUG="*:2" to check if gstreamer posts some warnings.

    

    Stefan

    

      

        


          

        
Interestingly if I change num-buffers to 90 then the
            program hangs and does not exit after 3 seconds as expected.
             Does this mean the queue is full?

        


          

        
Any ideas?

        


          

        
Anyone know a real world example where
            output-selector is being used. 

        


          

        
Thanks,

        


          

        
Garth Tissington
          

            
250 891 4797

            
---

            

              


              

              
Given sufficient thrust pigs fly just fine.

            

          

          

        

      

      

_______________________________________________
gstreamer-devel mailing list
[hidden email]
http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel


    

    

  



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gstreamer-devel mailing list

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-- 
----
Héctor Canto





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