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 07:58 PM, Thiago Santos wrote:
> 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?
As far as I know using the compositor element shouldn't be much 
different than using videomixer, just replace the element and give it a 
try. Unfortunately I don't remember any example code using it from the 
top of my head.

>>
>> Thanks very much,
>> Giacomo
>>
>>
>>
>> -- 
>> View this message in context: 
>> http://gstreamer-devel.966125.n4.nabble.com/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-P-tp4672943p4672964.html
>> Sent from the GStreamer-devel mailing list archive at Nabble.com.
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>
>


-- 
Thiago Sousa Santos
Senior Multimedia Engineer, Open Source Group
Samsung Research America - Silicon Valley