gscam core dumped with ximagesrc

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Hi,

I want to use gscam for capturing a window image. First, I have perfomed a simple test with:

$ export GSCAM_CONFIG="videotestsrc ! video/x-raw-rgb,framerate=5/1 ! ffmpegcolorspace"

And it works nicely. So I have set:

$ export GSCAM_CONFIG="ximagesrc xname=TurtleSim ! video/x-raw-rgb,framerate=5/1 ! ffmpegcolorspace"

But it fails :

Segmentation fault (core dumped)

It seems to be the std::copy from the buffer to the image.