[mpeg2] Black bands down both sides of video

[Stephen Robert Norris <srn@commsecure.com.au>]

I'm getting black bands down both sides of captured video. I'm using a
PAL composite video source which otherwise seems fine. It looks to me
like the card is capturing the entire PAL frame including horizontal
retrace (and in fact, vertical retrace, because I can see what's
probably the teletext information flickering at the bottom of the
frame).

How do I control the captured area to avoid this?

	Stephen



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