AW: dynamic videomixing

Bernhard Graaf bernhard.graaf at
Sat Dec 13 08:15:50 PST 2014

Hi Sérgio,


Thanks for answering. I’m very happy for your first answer (in my mind there
was a very complex construction if not :-))

I will try the second and third answer (should reboot to development system,
so it takes a wile).





Von: gstreamer-devel [mailto:gstreamer-devel-bounces at]
Im Auftrag von Sérgio Agostinho
Gesendet: Samstag, 13. Dezember 2014 16:38
An: Discussion of the development of and with GStreamer
Betreff: Re: dynamic videomixing


Hi Bernhard, 


I've tested the pipeline below and it works so the answer to your initial
question is, yes you can have only one sink pad in the video mixer

gst-launch-1.0 -ev v4l2src ! videomixer ! xvimagesink


Regarding the second question. 

Pad.html#gst-pad-link>  returns the reason why the link failed, and it is
normally quite descriptive as you can see on
ad.html#GstPadLinkReturn . Try to see what it is returning in your case.


Also have you tried to test your pipeline in gst-launch with the video



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