Datavideo KMU-200, Instruction Manual

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Encoder Mode
The Encoder Mode sets the video bitrate mode for your video stream. The available modes
are listed as follows:

High (8M)

Medium (4M)

Low (2M)
Tip: You can also switch between different bitrate modes by pressing the Bitrate button in
the H.264 Encoder button group. See Section 5.4 for details.
Profile
Profile
sets the H.264 encoding profile for your stream. The available options are Baseline ,
Main , and High . Typically, High profile provides the best image quality and is suitable in
most instances. However, depending on the decoder used when viewing the stream, such as
with mobiles devices, a Main or Baseline profile may be required.

High

Main

Baseline
Level
Levels specify the size of the video a decoder must be able to handle. They specify a
maximum bit-rate for the video and a maximum number of macroblocks per second. Level
numbers range from 1 to 5 with intermediate steps (e.g., 1.1, 1.2, 1.3 and etc). The table
below provides a summary of maximum parameters supported by each H.264/AVC level.
Level ID Max. Video
Bitrate in
kbits/s Max Frame Size
in macroblocks Max decoding speed in
macroblocks per
second Resolution, Frame Rate
(Max Stored Frames)
1.0 64 99 1485 128×96@30.9 (8)
176×144@15.0 (4)
1b 128 99 1485 128×96@30.9 (8)
176×144@15.0 (4)
1.1 192 396 3000 176×144@30.3 (9)
320×240@10.0 (3)
352×288@7.5 (2)
1.2 384 396 6000 320×240@20.0 (7)
352×288@15.2 (6)
1.3 768 396 11880 320×240@36.0 (7)
352×288@30.0 (6)
2.0 2000 396 11880 320×240@36.0 (7)
352×288@30.0 (6)
2.1 4000 792 19800 352×480@30.0 (7)
352×576@25.0 (6)
2.2 (SD) 4000 1620 20250 352×480@30.7 (12)
352×576@25.6 (10)
720×480@15.0 (6)
720×576@12.5 (5)