Advidia "A" Series Manual de usuario descargar pdf (Pagina 50)

Firmware User Manual

Parameters

Description

Encoder Type

There are two encoder types available: H.264 (High Profile) and MJPEG.

H.264 Profile

This item is available only if the Encoder Type is H.264.

The H.264 Profile defines the video compression scheme: High Profile,

Main Profile, and Baseline. These schemes vary from least compressed,

Baseline, to most compressed, High Profile. By default, the H.264 Profile is

High Profile, which provides the most compression with the best video

quality, but more computing power.

Some third-party video management system has longer latency or takes

more time to decode High Profile compression scheme, in this case, you

can select Main Profile or Baseline. In order to get the same video quality,

you can select a higher bit rate with lower compression; this is the same as

having a lower bit rate with a High Profile. For example, a video on High

Profile with 2M bit rate will have the same video quality as a video with

Baseline Profile at 3.5M bit rate.

VGA Aspect Ratio

It is used to define the aspect ratio of VGA stream – it can be either 4:3

ratio (640x480) or 16:9 ratio (640x360). When “Auto Detected” is chosen,

the VGA stream will follow the ratio of the higher resolution stream, to

ensure the identical view of stream 1 and stream 2.

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Advidia "A" Series Manual de usuario Pagina 50