OSD Property Page
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OSD is an acronym for On Screen Display. It provides the ability overlay graphics or text onto the live captured and encoded video. It is often used to watermark the video with a company logo or name. In the following example, the 'G' is displayed using white text on a black background as it is sometimes done for TV ratings. The background in the setup is always shown as opaque black, but it will actually be displayed on the video using the transparency level set. The Vitec Multimedia world logo is a *.tga file where the black background is transparent and the logo sphere is semi-transparent. The preview snapshot was taken from a Discovery channel feed which contained it's own OSD logo.
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· | Enable OSD - this control enables or disables the feature for the current project.
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· | Edit - this button pops up the following window which allow WYSIWYG layout of the OSD graphics or text.
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· | Add Bitmap - this button brings up a bitmap selection dialog box. Currently either *.bmp or *.tga files are accepted. For *.bmp files, the transparency of the entire bitmap can be set, but *.tga files can be created to have transparency in the back and foreground. Once placed, the bitmap can be moved around but not resized. To resize, save the bitmap to the desired size.
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· | Add Text - this button brings up a text dialog box. Once placed, the text can be moved around by dragging and dropping the text box. The font and size can be changed using the combo boxes shown at the top of the edit window. The font, size and color can also be set using the Font dialog from the context sensetive (right-click) menu. The transparency of the text (foreground) or background can be set independently. The default transparency for the background is 100% transparent and the default transparency for the foreground is 0% transparent.
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