How to set transparency

[Stefan Sauer]

On 04/03/2012 05:30 PM, kususe wrote:
> How do you code the part of pipeline to fix the transparency
> (sink_1::alpha=0.7)?
>
> "gst-launch-0.10 filesrc location=/home/boss/Scrivania/test_dc/geo.png !
> pngdec ! imagefreeze ! ffmpegcolorspace ! videomixer name=mix
> sink_1::alpha=0.7 ! ffmpegcolorspace ! xvimagesink filesrc
> location=video.webm ! matroskademux ! vp8dec ! mix. 
get a reference to the sink_1 pad and set the gobject property called
"alpha" to 0.7.
the alternative would be the python equiv of
gst_child_proxy_set(mix, "sink_1::alpha", 0.7, NULL);

Stefan
> I tried using alpha element, but it doesn't work. 
> I tried to use videoboxelement but the transparency setted up with alpha
> doesn't work. 
> I tried saving a transparent image, but it doesn't work. 
>
> Have you got any suggestion?
> Thanks in advance, 
> K.
>
>
>
>
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