large frame sizes with the deep pixel depth (24- or 32-bit), or complex format (yvu9 or yuv12 planar), impose heavy demands on the pci bus's data transfer capacity. our experience is that some systems cannot handle these formats at full frame sizes.

    systems vary in their data transfer limits. the characteristics of the pci bridge are often more important than processor speed.

    if you are having problems, we recommend that you:

    1 use a smaller frame size (480 x 320 or less)

    2 use a shallower color format (rgb15 or rgb24 instead of rgb32)

    3 try an rgb format instead of a yvu format, and a packed format instead of a planar format

    4 if you have a choice of pcs for video capture, try using another system with a different system board chipset

    unwanted closed caption text

    closed caption text consists of white or colored characters drawn on black character cells. in video that contains closed captioning information, the first active line of video in each field contains encoded closed caption text. in video that does not have closed captioning information, that line is simply ordinary video.

    if you leave closed captioning enabled and view non-closed caption video, the osprey-50 usb device will attempt to interpret the first line of each field of video as closed caption character codes. some video may appear sufficiently similar to closed caption data that the software thinks it is closed caption text. the result will be occasional randomly drawn text appearing on the screen.

    the solution is to turn off closed captioning when you are viewing sources that are not closed captioned. to do so, open the control dialog's closed caption page and uncheck the enable box in the display field. the change takes effect when video is restarted after exiting the dialog.