dynamic videomixing

[Sérgio Agostinho]

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.
gst_pad_link()
<http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstPad.html#gst-pad-link>
returns
the reason why the link failed, and it is normally quite descriptive as you
can see on
http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstPad.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
mixer?

Sérgio
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