User manual VIEWCAST OSPREY-240E AVSTREAM DRIVER V4.2

[. . . ] Osprey®-240e/450e User Guide AVStream Driver Version 4. 2 User Guide UL Statement, FCC Notice, Product Disposal Information Osprey-240e/450e User Guide AVStream Driver Version 4. 2 ViewCast Corporation 3701 W. Plano Parkway, Suite 300 Plano, TX 75075-7840 USA Revised 06/25/2008 © 2008 ViewCast Corporation. No part of this specification may be reproduced, transcribed, transmitted or stored in a retrieval system in any part or by any means without the express written consent of ViewCast Corporation. ViewCast Corporation reserves the right to change any products herein at any time and without notice. [. . . ] A transparency control can be used to blend the logo graphic with the background video. If the capture and preview video are different sizes, the logo is scaled to look the same on the preview video. 39 Osprey-240e/450e User Guide Chapter 2 The logo property controls work best when you are already running preview video. (If your application displays capture video in real time, capture video can be used instead). The logo property is organized as two sub-pages ­ File and Color, and Position. For other controls, click the File, Color, or Position radio button to bring up the right sub-page. Logo Pin Select When the "Both" radio button is selected, changes you make to the logo setup apply to both the capture and preview pins. For example, you could enable the logo on the capture pin but not on the preview pin, and thereby save some CPU time. When you select the "Capture" radio button, the current logo settings for the capture pin are loaded, and changes you make apply only to the capture pin, not to the preview pin. Windows Media Encoder does not grey out the Pin Select choices, and you have the options to choose "Capture, " "Preview, " or "Both. " Figure 2-40 Logo File and Color Figure 2-41 The Enable Logo checkbox, which is repeated on both sub-tabs, enables or disables logos. If you disable logos, all your other logo settings are retained for when you re-enable logos again. In Figure 2-41, the [Browse. . . ] button brings up a standard file select dialog. In RGB-24 format. 40 Osprey-240e/450e User Guide Chapter 2 If you have a graphic that is in another format, edit it with a drawing or photo edit program such as Windows Paint, and save it as RGB-24. Enable Keycolor Figure 2-42 You can control the key color and the transparency effect. A "key color" is a color that disappears from the graphic so that the underlying video shows through unchanged. If the Enable Key Color checkbox is unchecked, all colors are displayed. You can select one of four standard colors ­ dark gray, medium gray, cyan, or magenta ­ or a custom color. It you select Other, for a custom color, the three edit boxes ­ Red, Green, Blue ­ are activated, and you can enter any color value into these boxes. Keycolors to identify transparent portions of logos can be exact or inexact. If Tolerance is 0, then all keycolors have to exactly match the Red / Green / Blue values shown in the key color control group. If Tolerance is nonzero, then the Red / Green / Blue values can deviate from the keycolor by the tolerance value and still be treated as being equal to the keycolor. For example, if Tolerance is set to 5, and the keycolor is set to grey (192, 192, 192), then pixels in the bitmap with value (187, 187, 187) will also be transparent. Figure 2-43 Weighting The degree of transparency of the logo is variable through 101 steps. If you have set a keycolor, the weighting or transparency value is applied only to pixels that do not match the keycolor and hence are always completely transparent. You can set the weighting either with the slider or by editing the number in the edit box. (Figure 2-44). 41 Osprey-240e/450e User Guide Chapter 2 Figure 2-44 Note that the SimulStream Eval logo is a special case ­ it is restricted to the range 50 to 100 so that it cannot be made completely transparent Figure 2-46 Logo Position and Size The Logo Position and Size sub-tab lets you position and scale the logo. [. . . ] You can size and place the logo graphically on the video, or you can directly edit the top/left/height/width boxes. button brings up a dialog to enable color keying, select the key color, and set the transparency of the logo. The Device menu displays a list of enabled devices and provides access to the selected device's property pages. To set up other pin instances, or to set the capture and preview pins differently, use the driver's Logo property page. 69 Osprey-240e/450e User Guide Appendix A APPENDIX A Osprey Hardware Specifications . . Appendix A ­ Page A-1 Osprey-240e/450e User Guide Appendix A . Appendix A ­ Page A-2 Osprey-240e/450e User Guide Appendix B APPENDIX B Troubleshooting Color Bars on Video Screen The Osprey-240e/450e AVSstream Driver has a "built-in" Color Bar generator. [. . . ]