It's likely not being cropped per se, but rather is probably a victim of overscan. All non-computer displays cut off some percentage of the video signal, by design. Typically, if you want to ensure something appears on screen, don't put it in the outer 5% or so of the frame. If you absolutely have to change the size of the video image presented, the new roVideoPlayer component in the 2.6 SDK allows you to specify a size and position of the video. If you use this, you'll also manually have to handle transport events, etc, as this is intended to be a fully customizable solution.
