[gst-devel] Changing width/height properties from within plugin

[Stefan Kost]

Am 24.02.2010 18:09, schrieb Karol:
> Hello,
> 
> I'm trying to write trivial plugin that does image rotation (90, 180, 
> etc. degrees).  My question is - where should I change "width" and 
> "height" properties?  I thought the proper place would be _chain() 
> function(*) where I deal with buffer contents.  However, pipeline dies 
> with internal error if I do that.  I guess I should handle that 
> mysterious beast called caps negotiation? (specifically: _set_caps() 
> function?)

If you can't use videflip, you can at least look how it is done there.

STefan

> 
> (*) I'm using basic GstElement, not GstBaseTransform.
> 
> Thanks in advance.
> 
> 
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