Operation Manual

Appendix B: H.264 Advanced Settings
228 ViewCast
Setting
Explanation
compensation for any errors that arise in the motion
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
MPEG2 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 MPEG2 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 MPEG2 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