VBrick Systems VB4000, VB6000, VB5000 Configurable Input/Output Stream Rates WM Output Streams

Introduction

combinations of audio and video rates for multicasting, HTTP and RTSPU serving, HTTP Push, and Archiving. See the Configuration: Encoder pages for more information.

The following drawing shows the selectable output streams from a WM appliance. (Note that the Archive output on the right is actually a .wmv file rather than a stream.) Depending on your requirements and what you select, the VBrick will produce any or all of these outputs. Each output can be configured with different audio and video rates. A multicast stream, for example, can be substantially different from the served, pushed, or archived streams.

Figure 3. Configurable Input/Output Stream Rates

Table 4. WM Output Streams

Output	Description
Archive	An archive .wmv file is automatically created if the Archiver is running on the
	Configuration: Encoder > Archiver page. There are no restrictions on the
	"includes". This means you can select Video Rates 1, 2, and 3, and Audio
	Rates 1, 2, and 3. All included streams are multiplexed into a single archive
	file. A WM Appliance configured with a VBStar hard drive lets you create and
	save a .wmv file archive of the streams directly from the encoder. The file can
	be FTPed to a Windows Media Server or moved to a Windows system and
	played locally by a Media Player. (It can also be accessed locally via Using On
	Demand Playback.) In a mixed VBStar model with an MPEG-2 encoder and
	a WM encoder, the MPEG-2 encoder can archive the MPEG-2 stream and
	the WM encoder can archive the WM stream. In a mixed model with an
	MPEG-2 decoder and a WM encoder, only the WM encoder stream can be
	archived to disk.
Multicast	A multicast stream is typically used on a local intranet. It has only one video
	rate and one audio rate and is produced when Transmit is enabled on the
	Configuration: Encoder > Multicast page.
HTTP Push	An HTTP Push is a unicast stream that can be pushed to a maximum of 25
	different destinations. These destinations are typically VBrick Reflector
	Appliances or Microsoft Windows Media Servers. There is one set of
	configuration parameters to set address, publishing point name, user name,
	password, etc. for each destination. There are no restrictions on the
	"includes." This means you can select Video Rates 1, 2, and 3, and Audio
	Rates 1, 2, and 3. All included streams are multiplexed into one stream, and all
	destinations receive the same stream (with the same MBR combination).

VBrick WM Appliance Admin Guide 9