How can I create a mosaic in Gstreamer? How can I set "sink_0::xpos=0 sink_0::ypos=0 sink_0::alpha=0" in Python?

[Thiago Santos]

On 08/04/2015 02:12 PM, Giacomo D wrote:
> Thanks a lot Arjen!
>
> But when I do:
>
>         self.uridecodebin4.link(self.videoformatconverter4)
>         self.videoformatconverter4.link(self.videoscale4)
>         self.videoscale4.link(self.camerafilter4)
>         self.camerafilter4.link(self.videomixer.sink_1)
>
> I get this error: "AttributeError: '__main__.GstVideoMixer2' object has no
> attribute 'sink_1'"
you should use:

self.videomixer.get_static_pad ('sink_1') instead of 
self.videomixer.sink_1 as the instance won't have the pad as an attribute.

Requesting the pad with 'get_static_pad' will only work after requesting 
it to be created.

This will also work:

sinkpad = self.videomixer.get_request_pad("sink_1")
self.camerafilter4.link(sinkpad)

>
> Can you help me?
>
> And where can I find more documentation and how can I implement "compositor"
> in Python?
>
> Thanks very much,
> Giacomo
>
>
>
> --
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-- 
Thiago Sousa Santos
Senior Multimedia Engineer, Open Source Group
Samsung Research America - Silicon Valley