Niagara 2200 User Guide
ViewCast
123
Setting
Explanation
lower than
-3
and higher than
3
are usually not used, but could
be if so desired.
LookaheadFrames
This value is the amount of frames the encoder keeps in its
buffers to perform various calculations. The higher this value,
the better the quality and the closer to a constant bit rate the
encoded video will be; however the CPU load is higher and the
latency from the source through the encoder is also higher.
Setting this to
0,
depending on the encoder, will provide the
lowest latency possible.
NoiseReduction
This value performs adaptive noise reduction, estimates film
noise based on the value and attempts to remove the noise by
dropping small details before quantization (
100
to
1000
for de-
noising). As a result, using Noise Reduction can make the
encoded video look smoother, but with much less detail.
QuantizerMax
This value sets the maximum for the quantizer. The range is 1
to
51
with
51
being the highest and least complex quantizer
available. The value
51
provides the most encoding, thus
making the picture quality farthest away from the original.
However, lowering this value increases CPU load, in some
cases considerably. Also, this value affects the bit rate with
51
keeping closer to a constant bit rate, while lower values cause
the bit rate to vary.
QuantizerMin
This value sets the minimum quantizer ever used in the
encoder. The lower the quantizer, the closer the encoded
video is to the original. For most video, any value below
10
appears almost the same as the original video.
ReferenceFrames
This value is the number of previous frames each P-frame can
use as a reference. More reference frames increase the quality
of the encoded video but increases the CPU load. Each
increase, however has reduced benefit and takes longer to
encode.
SceneChangeDetectThreshold
Higher values of this setting cause the encoder to detect more
scene changes. For example, a fast action movie that has many
scenes can have this value set lower than a newscast, but the
newscast video quality may suffer a bit at the same value.
60
is
a good default for most applications.
0
turns off scene change
detection, but this is not recommended. Higher values also
increase CPU usage.
TrellisRDQuantization
This value performs Trellis quantization to increase the visual
quality of the encoded video: the higher the value, the better
the qualities of the video, but the higher the CPU load. This
value can also improve visual quality at lower bit rates.
However, settings above
0
are applicable for Main or High
Profile in the Custom Presets.
Summary of Contents for Nagara 2200
Page 1: ...Niagara 2200 User Guide...
Page 42: ...Advanced Operations 36 ViewCast Figure 26 Flash Encoder properties...
Page 55: ...Niagara 2200 User Guide ViewCast 49 9 Click Save Settings...
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Page 102: ...SNMP 96 ViewCast Figure 91 Installation Folder 4 Click Next Figure 92 Confirm Installation...
Page 111: ...Niagara 2200 User Guide ViewCast 105 Figure 105 IP Addresses...
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