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green border appears around video preview
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green border appears around video preview


My code is based on WhackedTV, and uses a NSOpenGLView subclass to display the video preview.

When I display a preview at 640 x 480, everything's fine, but when the preview size is 320 x 240, I see a green one pixel border around the top and sides of the preview image.

The view itself is 640 x 480 (i.e. at the lower resolution, the preview is scaling the image up).

If I capture the actual image data, the border does not appear, so I assume its being introduced somewhere in the display process.

Does anyone know how to fix this?

Googling showed me a VLC ticket that seems to show a similar problem in a different context (http://trac.videolan.org/vlc/ticket/991), and I'm sure I've seen something about this general issue mentioned before ...


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