MGW Diamond
Multi-Channel HEVC and H.264 Portable Encoder
User Manual, Version 1.6
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•
Aspect Ratio
–
The proportional relationship between the video width and its height. For
auto configuration “Same as Input” shall be set.
•
GOP Structure -
Specifies the GOP structure used by the encoder. The encoder
supports:
•
I: Intra Frame encoding
•
IP: IP encoding is recommended for most applications. This mode provides the best
configuration for optimal latency and quality.
•
I(B)P to I(7B)P: for future use.
•
GOP Size
–
The intervals between I-Frames. Range is 1-300. A default and optimal value
is calculated based on the profile selected and the encoding frame rate.
•
Fixed GOP Size
–
If enabled, it ensures GOP structure is not modified during the
encoding process. Fixed GOP Size might be necessary for compatibility with sensitive
decoder. When enabled, it impacts negatively the compression efficiency.
•
Timestamps
–
Enable to insert timing information in the video stream. If KLV is used, the
precision timestamp from KLV metadata is also inserted in the Video Elementary stream.
•
Auto-Adapt
–
Select the box to allow the encoder to automatically optimize advanced
compression and streaming parameters to the bit-rate you defined for the channel.
NOTE:
Use the manual settings option cautiously. Incompatible combination of parameters that were manually set, may
result in a video and audio quality degradation. Consult VITEC Support Team for recommendation on specific
settings if you wish to optimize the compression and streaming settings for a specific application.
•
MuxRate Overhead %
- The average amount of null packets relative to the video bitrate
while streaming CBR. The default value is designed for reaching the best video quality in
typical content. However, this parameter can be changed to achieve the best quality in
some other contents. Enter the allocated percentage of the stream for the multiplexer.
Range is 5-1000).
•
QP Base -
The initial quantization (compression) level value used (range is 1-51). An
automatic Qp is used when
“
-1
”
value is set.
•
QP Range Min
- Minimum quantization (compression) value (range is 1-51). When a
minimum value is set, the encoder will not use a lower value than specified. This setting is
mainly relevant for content with minimal movement where bit rate allocation can be
reduced.
•
QP Max
- Maximum quantization (compression) value (range is 1-51). When a maximum
value is set, the encoder will not use a higher value than specified. This setting is
specifically relevant in motion-intensive scenes where higher bit rate allocation is needed.
•
Initial Delay (ms)
- The delay for incoming PTS/DTS relative to PCR (range is 0-5000).
This setting enables the control of buffering within the receiver / decoder.
