User Guide

FILE FORMATS AND ATTRIBUTES

When a compression type is selected, a brief description of it is displayed

below the list box. The frequency response parameter of the description

indicates how wide, in Hertz, the bandwidth of the audio in the RealMedia file

will be.The bandwidth of a normal human’s hearing is about 20,000 Hz or 20

kHz.

Stereo to mono conversion

If the source audio file is stereo and you choose to convert to a mono

RealAudio format, you will need to decide what channel(s) to use for the

mono signal. Selecting Both channels will evenly mix the signal together. If you

are unsure of this option, always choose Both Channels.

Save video stream

When checked, the file’s video stream will be converted and saved into the

RealMedia file.

Video compression

Currently there are two types of RealVideo compression: RealVideo (Standard)

and RealVideo (Fractal). Each type is optimized for different types of video and

transfer rates. Detailed information on the two types is available on the

RealMedia home page (www.real.com).

Video compression quality (1 to 100)

This option allows you to compromise between quality of compression and

lowest possible data transfer rate. Setting this level at 100 provides the best

quality video with the greatest required bandwidth to stream. A setting of 1

gives you the lowest quality video but requires the least bandwidth to stream

effectively.

Frames per second (0.050 to 1000)

This setting allows you to change the frame rate of the video that is being

compressed. A lower frame rate, such as three or five frames per second, will

greatly lower the bandwidth requirements for streaming the video. Type the

desired frames per second into the edit box, or choose one of the presets from

the drop-down list.