Extra Information

Chapter 10: MPEG-4 Options and Settings
74 ViewCast
Tab Description
Transcode
• Next, choose from the Input File dropdown menu by clicking the box to the
right of the field for a file name to insert.
NOTE: The Niagara SCX video and audio settings remain inactive when you
use File Encoding.
• Remember the file name applies to the encoder system and not the system
currently running SCX Explorer.
IMPORTANT! When Niagara SCX and SCX Explorer reside on different computers, always
start your browse for files at My Network Places. Then work down or enter the
entire file pathname beginning with the system name (such as \\fileserver\c\videos).
If you simply enter a file name, you may inadvertently browse your local computer
when the media file resides on the remote computer.
Video Settings
• Control the capture properties for the selected video device (Figure 128).
• The Input field lists all input connectors available for the capture device.
• The Signal field lists the various video standards the capture device supports.
• You can adjust capture properties such as proportion, video size, and
width/height using the provided fields.
• Adjust additional capture properties of brightness, contrast, saturation, and
hue individually for each input source using the sliding bars.
• When making such adjustments, verify your adjustments apply to the selected
input.
• Otherwise, your adjustments apply to all the input sources listed.
• These capture properties remain available regardless of whether the encoder
starts or remains idle.
Figure 128. MPEG-4 Video Settings
Gamma
Corrections
• Adjust the gamma of the incoming video.
• Gamma refers to the response curve of video cameras/CRTs.
• When you capture video with a camera, the camera response remains
deliberately nonlinear – it boosts low lumen values and compresses high lumen
values – based on two reasons:
(1) It increases the effective bandwidth in the low lumen range, where you need
it, at the expense of the high lumen range, where you need it less.
(2) It matches the response characteristics of TV sets and monitors.