Chapter 3 ’Web User Graphical Interface’ — Workflow Library
318 Electra VS
-
Version 05.10
User Manual - Rev. A
H.265 HEVC Hardware Encoder
Hardware encoding of HEVC UHD. You shall use this module only if you
have the additional accelerator board for UHD encoding installed
(ELC-VS-HW-UHD).
Figure 3-288. H.265 HEVC hardware encoder parameters
For this processing component, you must set the following parameters:
Bitrate
(only for CBR): enter the bit rate value (without encapsulation
overhead), in bits per second.
I period
: maximum size of the GOP.
P period
:
1
if the GOP contains no B frame
2
if a B frame is present between each P frame
4
if four B frames are present between each P frame
8
if eight B frames are present between each P frame
GOP Type
: if set to IB image, no P image will be present in the output
stream. Usually, IB is used for UHD resolution and IPB is used for HD
resolution.
Adaptive GOP
: if set to
false
, GOPs always have the same structure.
If set to
true
, the scene cut detection feature is used and the GOP
structure is modified consequently.
Adaptive GOP
is always the best
choice regarding video quality, even for Web TV adaptive bitrates.
Closed GOP Period
: GOP period after which the encoder creates a
closed GOP.
Temporal Scalability
: Used to enable (
true
) or disable (
false
) the
temporal scalability. When Temporal Scalability is true, the number of
sub-layers depends on the P period:
If the P period is 2, then there are 2 sub-layers
If the P period is 4, then there are 3 sub-layers
If the P period is 8, then there are 4 sub-layers
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