DMG 3200/3100/3000 – User Manual
Page 209 (306)
Figure 8.24 – Video Extended configuration
The following parameters are available for video extended configuration:
Weighted
Prediction
In H264 mode, the encoder can employ Weighted Prediction to improve
the coding efficiency of fades and dissolves. It is recommended to have
this enabled.
Fade Detection
When a fade is detected, the GOP structure is adjusted to improve the
encoding efficiency of the fade. It is recommended to have this enabled.
Scene
Change
Detection.
When a scene change is detected, the GOP sequence is adapted so that
the new scene starts with an I frame. It is recommended to have this
enabled.
GOP Size
Sets the number of frames in a GOP.
GOP Struct
Sets how many B frames there should be between P frames
GOP Mode
Selects open or closed GOP. It is recommended to have this to “open”.
Only use closed if STB’s do not support open GOP.
Dynamic
Dynamic GOP mode lets the encoder adjust the GOP structure
depending on content. Most GOPs will be of the length set in “GOP
Size”, but when the content requires a different structure, the encoder will
adjust the GOP to achieve better video quality. It is recommended to
have this enabled.
Max/Min
Applicable in Dynamic GOP mode. Sets the min and max number of
successive B frames allowed in the GOP structure.
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