VIDEO_MAX_SHUTTER

 

Description

Get or set the maximum auto (slowest) shutter speed.

In auto shutter mode, the sensor will adapt it's shutter speed to have better exposure condition for image processing. The shutter speed become slow when the exposure condition is getting poor. However, in the video streaming, the longer shutter causes the motion blur problem. User could limit the slowest shutter speed to have less motion blur. However, it causes higher video noise problem. The URL could help user to trade off these two situations (higher video noise and motion blur) well. This function is also called maximum exposure time setting.

The available shutter speeds for maximum auto shutter speed setting depend on the sensor/DSP/ISP configurations. Please refer the Camera Setup Design Specification for further details.

The error message will be returned if the encoder does not support this URL.

Input Argument

IndexOfShutterSpeed
where
it gives the shutter speed index to the camera. The camera uses its shutter speed index table to set the maximum auto shutter speed.
This index might get different maximum auto shutter speed in camera with different sensor/DSP/ISP configurations. (We well unify the maximum shutter speed to the shutter index for all sensor/DSP/ISP configurations later on)
Here gives the mapping table of the IndexOfShutterSpeed and Sensor/DSP/ISP configurations.

IndexOfShutterSpeed Sensor/DSP/ISP Configurations
General Configuration* Sony IT-1
0 Use sensor's default setting 1/1000
1 1/60 or 1/50 seconds 1/500
2 1/30 or 1/25 seconds 1/250
3 1/10 seconds 1/120 or 1/100 seconds
4 1/5 seconds 1/60 or 1/50 seconds
5 1/120 or 1/100 seconds 1/30 or 1/25 seconds
6 1/250 15/1 or 1/10 seconds
7 1/500 1/5
8 1/1000 1
9 1/2000 2
10 1 3
11 2 4
12 3 None
13 4 None
14 1/15 or 1/13** None

*: include the MT9V135, MT9M131, HQ1, OV9710, ...
**: shutter 1/13 seconds is used in PlatformK camera at 50Hz power line frequency.

Attribute

Return of Message

VIDEO_MAX_SHUTTER='4'

OK: VIDEO_MAX_SHUTTER='4'
or
ERROR: VIDEO_MAX_SHUTTER='4'

Applicability

Status

Valid

See Also

VIDEO_EXPOSURE_MODE, VIDEO_SHUTTER_MODE, VIDEO_SHUTTER_SPEED, VIDEO_SLOW_SHUTTER

Example

http://ip:port/cgi-bin/encoder?USER=Admin&PWD=123456&VIDEO_MAX_SHUTTER
or
http://ip:port/cgi-bin/cmd/encoder?VIDEO_MAX_SHUTTER

http://ip:port/cgi-bin/encoder?USER=Admin&PWD=123456&VIDEO_MAX_SHUTTER=0
or
http://ip:port/cgi-bin/cmd/encoder?VIDEO_MAX_SHUTTER=0

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