User manual VIEWCAST N7500

[. . . ] Niagara 7500 User Guide Document Number: 40-03258-01A Date: 02. 10. 2009 Niagara 2120 Release: 1. 0 Document Number : 4 0-03260-01-C Date: July 2010 Niagara 7500 i ViewCast Niagara 7500 User Guide COPYRIGHTS Copyright© 2009 ViewCast Corporation. Trademarks or registered trademarks of ViewCast Corporation or its subsidiaries include: ViewCast ViewCast logo Niagara Niagara logo Niagara SCX SimulStream GoStream Osprey Trademarks or registered trademarks of Microsoft Corporation include: Microsoft Windows Silverlight Windows XP Windows Media Trademarks or registered trademarks of RealNetworks Inc. Corporation include: RealVideo RealPlayer RealSystem Helix SureStream Trademarks or registered trademarks of Apple Inc. include: QuickTime iPod Trademarks or registered trademarks of Adobe Systems Inc. [. . . ] Flash Encoder Properties 44 ViewCast Niagara 7500 User Guide Video Tab Flash adds some additional frame and bit rate controls. The frame rate changes the frames per second that the video will be encoded. You can use the audio format setting to modify the audio frequency and change stereo to mono. The bit rate settings pertain to the amount of data per second the audio and video are captured. Decreasing the bit rate for both or either decreases the playback viewing quality. You can encode in multiple streaming formats and resolutions simultaneously from the same video source. The video input must match the connectors on the back of the Niagara 7500 and your video source. The Proportions field has two settings: 2. Standard ­ Square pixels for a VGA monitor CCIR-601 ­ Elongated pixels for a TV monitor Click the setting that reflects the type of display on which your viewers will view your content. For example, if you want to stream your video on the Internet for the user to view on a computer monitor, select Standard. If you select an inaccurate setting, your video will ViewCast 45 Chapter 4: Advanced Operations Step be distorted. 4. Action In the Size field, click the pixel size of the encoded video from the drop-down list. This customization is useful when you are capturing video to be played on a mobile video-device that requires a non-standard size for compatibility. When you click Custom, two additional fields appear so you can enter the exact size you want the resulting video to be (Figure 57). Ensure all of the encoders using the same video Proportion and Size settings also use the same Video and Audio Source settings. Drag the sliders to adjust the Brightness, Contrast, Hue, and Saturation (Figure 58). Video Filter Settings NOTE: Click Restore to the right of the filter to reset the settings to the default. Options include: None ­ Performs no de-interlacing of any kind. Auto ­ Applies inverse telecine de-interlacing to all telecine video. ­ Applies motion adaptive de-interlacing to all video that is not telecine. ­ Switches dynamically between the two modes as the content changes. Inverse Telecine ­ Drops the redundant fields and reassembles the video in a 24 fps progressive format. ­Available for NTSC video only. ViewCast 46 Niagara 7500 User Guide Step Action Motion Adaptive ­ Is an algorithm for de-interlacing pure video (non-telecine) content. [. . . ] This value means the quantizer assigned to each frame is blurred temporally with its neighbors to limit quantizer fluctuations. This value sets the targets average reduction in bit rate for Bframes as compared to P-frames. This value makes them better references, which can improve the overall image quality. The problem is that the extra bits taken by the B-frames are taken from the Pframes, which makes this variable a balancing act. [. . . ]