Duplicate images using GSCAM

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Hi,

I am trying to use GSCAM to capture video from a composite video input through a ViewCast Osprey 230 analogue video capture card.

I have set GSCAM_CONFIG to:

GSCAM_CONFIG="v4l2src device=/dev/video0 ! video/x-raw-rgb ! ffmpegcolorspace"

And viewing the video through image_view

rosrun image_view image_view image:=/gscam/image_view

The problem is the image is duplicated. I only get this problem running when using gscam and the capture card, a USB webcam I have tested works fine. I presume that I need to alter GSCAM_CONFIG but I have not been able to find the correct configuration yet.

Screenshot of my problem:

Any help would be much appreciated!

Thanks