11.5.1.2
Note
Note on Encoder Settings: Video bit rate mode can be set to be constant (i.e. the number
of bits in a group of pictures) or variable. Selecting the correct mode for a given application,
with emphasis on a good compromise between detail and good representation of frequent
changes (motion), is generally vital.
Constant bit rate mode (CBR) is generally safest. Although the image quality may vary, the
network load generated will remain fairly constant.
If constant picture quality is required and a varying network load will pose no problems,
choose Variable bit rate mode (VBR). Video streaming is generally smoother under VBR.
Improving video picture quality and video stream quality, in terms of latency and
smoothness for example, is subject to trade-offs. Many aspects of picture quality and stream
quality are governed by a series of compression and signal parameters which may work
favorably on one aspect while adversely affecting another.
For example, increasing the bit rate generally improves video quality, but also puts
additional load on the network. But even for a given bit rate and network performance, video
quality and streaming are influenced by other parameters and aspects. Please consult
appropriate literature on video encoding formats, and application notes for clarification.
If in doubt about the effects of specific encoder settings, you are advised to select the profile
offering the closest match to your required application.
11.5.2
Make a video connection
Creating a video link between Encoder 3/4 and a video decoder is done in the same fashion as
described for Encoder 1/2 earlier in this chapter.
11.5.3
Advanced
Important: If in doubt about these settings, do not change the default values.
11.5.3.1
Encoder
Depending on the selected encoding mode, specific parameter values in this section are
dimmed - that is, not available for configuration.
MPEG-2 mode
Video > Encoder # > Advanced > Encoder (MPEG-2 mode)
Video
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