Operation Manual

Appendix B: H.264 Advanced Settings
180 ViewCast
Setting
Explanation
estimation while encoding the video. The actual value of
256 corresponds to a value of 1.0 and is set to maximum
as the default.
MotionEstimationSubPixelComparison
Setting this value causes the encoder to select the sub-
pixel motion estimation comparison. 0 is the default for
MPEG4 Simple Profile encoding because only Advanced
Simple Profile allows for sub-pixel motion estimation. You
can use higher values but they can increase CPU and
memory usage, sometimes with minimal significant gain
in quality.
Note: The correct range is 0 to 14, but a value of 256
that affects the color portion of the video only is
available. Only use this value when you completely
understand the encoding needs. All other values are
ignored.
MpegQuant
Setting the value of this to 0 will use quantizers for
Simple Profile MPEG4 encoding while using 1 will use
quantizers for Advanced Simple Profile and for high bit
rate encoding more detail from the original video will be
preserved. For lower bit rate encoding, using 0 smooths
out the video appearance.
QuantizerMax
This value sets the maximum for the quantizer in use. The
range is 1 to 51 with 51 being the highest and least
complex quantizer available. The value 31 is a good
default. However lowering this value increases the CPU
load, in some cases considerably. Values above 31 are
available, but could significantly affect video quality
negatively.
QuantizerMin
This value sets the minimum quantizer 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.
SceneChangeDetectThreshold
Higher values of this setting cause the encoder to detect
more scene changes and insert extra I-frames as needed.
For example, a fast-action movie with many scenes could
have this value set lower than a newscast, but the
newscast video quality may suffer a little at the same
value. 45 is a good default for most applications using
MPEG4 encoding. 0 turns off scene change detection, but
is not recommended. Higher values also increase CPU
usage.
TrellisRDQuantization
This value performs Trellis quantization to increase the
visual quality of the encoded video by determining the
optimal encoding: the higher the value, the better the
video quality but the higher the CPU usage. This value