[gst-devel] Rendering mjpeg streaming video in the defined alpha channel of a jpeg

[thelenko]

I did some tweaking and am now at:

gst-launch -v multifilesrc location="crosshair.jpg"
caps="image/jpeg,framerate=1/1" ! decodebin ! videomixer name=mixer !
xvimagesink gnomevfssrc
location=http://ccd1611-403/axis-cgi/mjpg/video.cgi?.mjpg ! decodebin !
mixer.

This is able to launch without error.  Note that I removed the 'alpha
method=green' method, so now I simply have a video overlayed on the
crosshair graphic instead of the video appearing in the defined alpha
channel of the graphic.

A secondary problem I am having now is that when using videomixer both my
video feed and image lose their color and framerate.


Andres Gonzalez wrote:
> 
> Hi,
> I am not a GStreamer expert, but recently I have been working with 
> videomixer and had similar problems. That "Task paused, reason 
> not-negotiated (-4)" happened a lot. It looks to me like in one of the 
> branches of your pipeline (that which gnomevfssrc0 belongs to) there is 
> no way to get all the elements working together, because for each thing 
> the upstream elements can produce, the downstream elements can't manage 
> it (don't take this too seriously, I'm just writing what I think...).
> So in a few words, I think there is some element missing, possibly a 
> videoscale element in some point between videomixer and gnomevfssrc0, or 
> maybe between videomixer and multifilesrc. Maybe then you will also want 
> to specify the capabilities (image size, for example).
> 
> Surely the big guys can correct me if I'm wrong :-)
> 
> Good luck,
> Andrés
> 
> 

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