H.264 Network Video Streaming Server
NVS-25
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Video Tuning
For HDMI and CVBS inputs, set video brightness, contrast, hue and saturation on the
NVS-25. SDI video is usually adjusted on the source equipment before it is delivered to
the NVS-25. The values of brightness, contrast, hue and saturation range from 0 to 255
with the default programmed to 128.
Image Size
The first step of encoder setup is to adjust the image size. The NVS-25 allows you to
downscale the output image and set the SD aspect ratio at the input. The Scale Down
function, as the name suggests, allows the user to shrink the image size. The table
below shows all possible downscaled resolutions on NVS-25.
Original Resolution
Downscaled Resolution
1920x1080
1280x720, 720x567, 720x480
1280x720
720x576, 720x480
720x576
720x480
H.264 Encode
The H.264 standard can be viewed as a "family of standards" composed of different
profiles. A specific encoder encodes at least one, but not necessarily all profiles. The
NVS-25 offers the user three profiles: Main Profile 3.0, Main Profile 3.1 and High Profile
4.0.
