Difference between revisions of "Video API legacy"

Latest revision as of 15:42, 24 August 2008

This is a legacy page. The information bellow is not compatible with Elphel 393 or 353/363 series cameras.

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Video API is not implemented in the Model 353 camera (and in 333 it does not support the latest FPGA/driver features) - please use ccam.cgi--Andrey.filippov 00:07, 5 September 2007 (CDT)

Anyone who has even the slightest skill at writing HTML pages can use the Axis Video API. And with additional software installed, it is possible to create a powerful video observation system with the capabilities of recording video archives, journalizing, viewing of archives, etc. Note Change API legacy an how to enable the Video API.

Information about image dimensions

Some default parameters and some which are transferred when the image is obtained can change the image dimensions. For example parameters such as resolution, e_dcm_hor, e_dcm_vert, e_woi_width, e_woi_height, e_woi_left, e_woi_top. Sometimes a client application needs to know about the dimensions of the received image in advance (for example, for reserving a necessary area in a browser page or application window). You can obtain this information at the address:

http://192.168.0.9/var/axis-cgi/view/imagesize.cgi?

It is possible to transfer with this script any of the parameters which are supported by image.cgi and video.cgi. For example:

http://192.168.0.9/var/axis-cgi/view/imagesize.cgi?e_dcm_vert=2&e_dcm_hor=2&e_woi_width=1800

The server response is:

image width  = 896
image height = 768

Static images

To retrieve an image from the camera it is enough to type the following path in the browser's address field:

http://192.168.0.9/jpg/image.jpg

Note 192.168.0.9 - this is the default camera IP-address. If you have changed the camera IP-address, please, type your variant.

It is also possible to ask the camera to send the image with a certain set of parameters. The path which can be used for this:

http://192.168.0.9/axis-cgi/jpg/image.cgi?param1=xxx&param2=yyy&.....

See the list of accessible parameters below.

resolution=<string> Specify the resolution of the returned image, for example 800x600. Product-dependent. You can check what values are supported by your camera using the address: http://192.168.0.9/axis-cgi/admin/param.cgi?action=list&group=Properties.Image.Resolution

compression=<int> Adjusts the compression level of the image. Higher values correspond to higher compression, i.e. lower quality and smaller image size. It can take a value from 0 to 100. In many cases 30 is optimal.

colorlevel=<int> Sets level of color or grey-scale. It can have value from 0 to 100. 0 = grey-scale, 100 = full color.

color=<int> Enables/disables color. It can have value 0 or 1. 0 = black and white, 1 = color.

rotation=<int> Rotates the image clockwise. Product-dependent. You can check what values are supported by your camera at the address: http://192.168.0.9/axis-cgi/admin/param.cgi?action=list&group=Properties.Image.Rotation

Apart from the standard parameters, enumerated above, there are some extensions, which make it possible to use the Elphel cameras more flexibly. You can read more detailed information about these extensions at Video API Extensions.

Example of obtaining an image with the assigned set of parameters:

http://192.168.0.9/axis-cgi/jpg/image.cgi?resolution=1024x768&colorlrvel=45&compression=30

If some parameters are not assigned, the default value is used. You can see the default values at the address:

http://192.168.0.9/axis-cgi/admin/param.cgi?action=list&group=Image.I0.Appearance

You can change the default values. For this it is necessary to specify the parameter action=update. For example:

http://192.168.0.9/axis-cgi/admin/param.cgi?action=update&Image.I0.Appearance.Resolution=512x384&Image.I0.Appearance.Rotation=180&ColorEnabled=no&Image.I0.Appearance.Compression=50

http://192.168.0.9/axis-cgi/admin/param.cgi?action=update&ImageSource.I0.Sensor.ColorLevel=60

Video stream

The cameras can be used to receive a continuous video stream. This stream can be transferred by two protocols - HTTP and RTP.

HTTP

Jpeg

The stream is a sequence of jpeg-files, separated by a special marking line. This transfer format is named Multipart Jpeg or MPJPG. For receiving a stream in this format you can use the following path:

http://192.168.0.9/mjpg/video.mjpg

As with static images, you can also assign parameters for the video stream. For this you can use the following path:

http://192.168.0.9/axis-cgi/mjpg/video.cgi?param1=xxx&param2=yyy&.....

Apart from the parameters, enumerated above, such as resolution, compression, colorlevel, color, rotation, you can also assign:

duration=<int> Specifies for how many seconds the video will be generated and pushed to the client. 0 = unlimited.

nbrofframes=<int> Specifies how many frames the server will generate and push. 0 = unlimited.

fps=<int> Using fps it is possible to specify the frame rate from the server. 0 = unlimited.

By default all these parameters are assigned to 0. You can change the default settings, for example, in this way:

http://192.168.0.9/axis-cgi/admin/param.cgi?action=update&Image.I0.Stream.Duration=100&Image.I0.Stream.FPS=5&Image.I0.Stream.NbrOfFrames=1000

Apart from the standard parameters, enumerated above, there are extensions, which allow you to use the Elphel cameras more flexibly. More detailed information about these extensions can be found at Video API Extensions.

On the page Video API And Client Applications you can find some information about players, which can play the MPJPG video stream.

Theora

RTP

Video Parameters

Note that due to obscure reasons, parameters set via

http://192.168.0.9/axis-cgi/admin/param.cgi?action=update&root.ImageSource.I0.Sensor...=...

will not take effect for RTP streams until the camera is restarted, although they will take effect immediately for videos streamed directly via HTTP.

You can access the list of parameters used for RTP streaming, by accessing the following URL:

http://192.168.0.9/axis-cgi/admin/param.cgi?action=list&group=ImageSource.I0.E_CurrentState

Jpeg

Each jpeg-file is divided into many files with a size less than 1500 bytes which are transferred by RTP/UDP protocol through the network. In this case the data transmission is substantially accelerated, but the reliability of transfer falls, which can overload some networks and lead to the loss of a certain amount of video data.

On the page Video API And Client Applications you can find information about players, which can play the RTP/JPEG stream.

Multicast

To obtain a video stream using RTP/Multicast it is sufficient to set the special variable:

http://192.168.0.9/axis-cgi/admin/param.cgi?action=update&Network.RTP.R0.MulticastAlways=yes

The video stream will be generated with the default settings of variables for Multicast address, destination port and TTL. These variables can be changed by the following way:

http://192.168.0.9/axis-cgi/admin/param.cgi?action=update&Network.RTP.R0.VideoAddress=224.21.23.44&Network.RTP.R0.VideoPort=22222&Network.RTP.R0.TTL=90

Please note that while Network.RTP.R0.MulticastAlways is enabled, the HTTP MJPEG interface will become very slow. So you might want to disable it if not used by your application.

SDP

This video stream can be received, recorded or played back by MPlayer, QuickTime, vic (from the mush package). For this it is necessary to obtain the SDP-file from camera:

http://192.168.0.9/mjpg/media.sdp

The saved file should be transferred to your preferred player. For example:

mplayer sdp://media.sdp

RTSP

The original Axis Video API specification does not support RTSP in Multicast mode. In the Elphel cameras this possibility has been added as a protocol extension.

Unicast

RTSP

Theora

Obtaining information about system functioning

You can obtain information about the system at the address:

http://192.168.0.9/axis-cgi/admin/systemlog.cgi

or more detailed information at the address:

http://192.168.0.9/axis-cgi/admin/serverreport.cgi

Date and Time

Retrieving the Date and Time

To see the time which is stored inside the camera you can use the address:

http://192.168.0.9/axis-cgi/admin/date.cgi?action=get

Setting Date and Time

For setting the date and time you must use the following parameters:

action	-	set
year	-	1970 - 2031	Current year.
month	-	1 - 12	Current month.
day	-	1 - 31	Current day.
hour	-	0 - 23	Current hour.
minute	-	0 - 59	Current minute.
second	-	0 - 59	Current second.

For example:

http://192.168.0.9/axis-cgi/admin/date.cgi?action=set&year=2006&month=4&day=15&hour=14&minute=20&second=40

User administration

The Video API allows:

registration and deleting of users
changing user passwords
adding users to special groups

Deleting a user

http://192.168.0.9/axis-cgi/admin/pwdgrp.cgi?action=remove&user=joe

Creating a new user

http://192.168.0.9/axis-cgi/admin/pwdgrp.cgi?action=add&user=joe&pwd=PASSWD&grp=axuser&sgrp=axview&comment=JOE

Creating a new user is slightly different for Elphel and Axis cameras. All created users which will have the access to camera through Video API MUST belong to the axoper group. Also these users must belong to one or more secondary groups:

axview	-	access is permitted to scripts which are placed in directory /axis-cgi/view/
axoper	-	access is permitted to scripts which are placed in directory /axis-cgi/operator/
axadmin	-	access is permitted to scripts which are placed in directory /axis-cgi/admin/

At the same time it is necessary to pay special attention, because users who have Administrator rights must be entered into all three groups, users who have Operator rights must be entered into the axoper and axview groups, users who have Unprivileged user rights must be entered into the axview group only. Creating of three users with different rights, for example:

Administrator:

http://192.168.0.9/axis-cgi/admin/pwdgrp.cgi?action=add&user=administrator&pwd=foo&grp=axuser&sgrp=axadmin:axoper:axview&comment=Administrator

Operator:

http://192.168.0.9/axis-cgi/admin/pwdgrp.cgi?action=add&user=operator&pwd=foo&grp=axuser&sgrp=axoper:axview&comment=Operator

Unprivileged user:

http://192.168.0.9/axis-cgi/admin/pwdgrp.cgi?action=add&user=administrator&pwd=foo&grp=axuser&sgrp=axview&comment=Viewer

Password changing

http://192.168.0.9/axis-cgi/admin/pwdgrp.cgi?action=update&user=joe&pwd=pass

Changing the access rights for secondary group

http://192.168.0.9/axis-cgi/admin/pwdgrp.cgi?action=update&user=joe&sgrp=axview:axoper

Rebooting the camera

For camera rebooting, you should use the following address:

http://192.168.0.9/var/axis-cgi/admin/restart.cgi

Exposure control

The Elphel cameras support exposure control with the standard and advanced interface. You can read about Advanced Settings on the page Video_API_Extensions

Autoexposure

To enable autoexposure you can use the following command:

http://192.168.0.9/axis-cgi/admin/param.cgi?action=update&ImageSource.I0.Sensor.Exposure=auto

Autoexposure parameters

It is possible to assign the area for autoexposure calculation. You can do this using the following command:

http://192.168.0.9/axis-cgi/admin/param.cgi?action=update&ImageSource.I0.Sensor.ExposureWindow=full

The ExposureWindow can have the values full, center, lower, upper, right and left.

Also it possible set a maximum exposure time (number of micro seconds) :

http://192.168.0.9/axis-cgi/admin/param.cgi?action=update&root.ImageSource.I0.Sensor.MaxExposureTime=150000

Manual control of exposure

To enable manual control of exposure you can use the following command:

http://192.168.0.9/axis-cgi/admin/param.cgi?action=update&ImageSource.I0.Sensor.Exposure=manual

Also you can set the time an image is exposed (0.1 msec step):

http://192.168.0.9/axis-cgi/admin/param.cgi?action=update&root.ImageSource.I0.Sensor.Shutter=50

For example Shutter=50 means 5000 microseconds or 5 miliseconds.

Troubleshooting

If your attempts to access images fail with 500 Server Error, you may have to explicitely enable the Video API.

@@ Line 1: / Line 1: @@
+{{Manual legacy_pages}}
 {{en|ru=First_Acquaintance_With_Video_API.Ru|cn=Video_API_Extensions.cn}}
-The elementary system of using the Axis Video API, any who has even the slightest skills of writing HTML of pages can create. And with installed a set of the additional software, it is possible to create powerful enough system of video observation with an opportunity of record of videoarchives, journalizing, viewing of archives, etc.
+''Video API is not implemented in the Model 353 camera (and in 333 it does not support the latest FPGA/driver features) - please use [[ccam.cgi]]''--[[User:Andrey.filippov|Andrey.filippov]] 00:07, 5 September 2007 (CDT)
+Anyone who has even the slightest skill at writing HTML pages can use the Axis Video API. And with additional software installed, it is possible to create a powerful video observation system with the capabilities of recording video archives, journalizing, viewing of archives, etc. Note [[Change API legacy]] an how to enable the Video API.
 == Information about image dimensions ==
-Some parameters by default or transferred at the images obtaining is changing the image dimensions. It's such parameters as '''resolution, e_dcm_hor, e_dcm_vert, e_woi_width, e_woi_height, e_woi_left, e_woi_top'''. Sometimes for client application is necessary to know about dimensions of obtained image in advance (for example, for reserving a necessary area in a browser page or application window). You can obtain this information at the address:
+Some default parameters and some which are transferred when the image is obtained can change the image dimensions. For example parameters such as '''resolution, e_dcm_hor, e_dcm_vert, e_woi_width, e_woi_height, e_woi_left, e_woi_top'''. Sometimes a client application needs to know about the dimensions of the received image in advance (for example, for reserving a necessary area in a browser page or application window). You can obtain this information at the address:
   <nowiki>http://192.168.0.9/var/axis-cgi/view/imagesize.cgi?</nowiki>
-Is possible the transfer to this script of any parameters, which support the image.cgi and video.cgi. For example:
+It is possible to transfer with this script any of the parameters which are supported by image.cgi and video.cgi. For example:
   <nowiki>http://192.168.0.9/var/axis-cgi/view/imagesize.cgi?e_dcm_vert=2&e_dcm_hor=2&e_woi_width=1800</nowiki>
 The server response is:
@@ Line 14: / Line 18: @@
 == Static images ==
-For obtaining image from camera is enough to type the following path in the browser's address field:
+To retrieve an image from the camera it is enough to type the following path in the browser's address field:
   <nowiki>http://192.168.0.9/jpg/image.jpg </nowiki>
-'''Note''' 192.168.0.9 - it's the camera IP-address by default. If you have changed the camera IP-address, please, type your variant.
+'''Note''' 192.168.0.9 - this is the default camera IP-address. If you have changed the camera IP-address, please, type your variant.
-It's possible also to inquire from camera the image with a certain set of parameters. The path is used for this:
+It is also possible to ask the camera to send the image with a certain set of parameters. The path which can be used for this:
   <nowiki>http://192.168.0.9/axis-cgi/jpg/image.cgi?param1=xxx&param2=yyy&.....</nowiki>
@@ Line 26: / Line 30: @@
 See the list of accessible parameters below.
-'''resolution'''=<string>    Specify the resolution of the returned image, for example 800x600.  Product-dependent.  Checking the values which supported by your camera is possible at the address:  ''<nowiki>http://192.168.0.9/axis-cgi/admin/param.cgi?action=list&group=Properties.Image.Resolution</nowiki>''
+'''resolution'''=<string>    Specify the resolution of the returned image, for example 800x600.  Product-dependent.  You can check what values are supported by your camera using the address:  ''<nowiki>http://192.168.0.9/axis-cgi/admin/param.cgi?action=list&group=Properties.Image.Resolution</nowiki>''
-'''compression'''=<int>    Adjusts the compression level of the image. Higher values correspond to higher compression, i.e. lower quality and smaller image size.  It can have value from 0 to 100. In many cases the 30 is  optimally.
+'''compression'''=<int>    Adjusts the compression level of the image. Higher values correspond to higher compression, i.e. lower quality and smaller image size.  It can take a value from 0 to 100. In many cases 30 is optimal.
 '''colorlevel'''=<int>    Sets level of color or grey-scale. It can have value from 0 to 100.  0 = grey-scale, 100 = full color.
@@ Line 34: / Line 38: @@
 '''color'''=<int>    Enables/disables color.  It can have value 0 or 1.  0 = black and white, 1 = color.
-'''rotation'''=<int>    Rotates the image clockwise.  Product-dependent.  Checking the values which supported by your camera is possible at the address:  ''<nowiki>http://192.168.0.9/axis-cgi/admin/param.cgi?action=list&group=Properties.Image.Rotation</nowiki>''
+'''rotation'''=<int>    Rotates the image clockwise.  Product-dependent.  You can check what values are supported by your camera at the address:  ''<nowiki>http://192.168.0.9/axis-cgi/admin/param.cgi?action=list&group=Properties.Image.Rotation</nowiki>''
-Except the standard parameters, enumerated above,  there are the extensions, which make it possible to more flexibly use cameras Elphel. More detailed information about these extensions you can read [[Video API Extensions]].
+Apart from the standard parameters, enumerated above, there are some extensions, which make it possible to use the Elphel cameras more flexibly. You can read more detailed information about these extensions at [[Video API Extensions]].
-Example of obtaining image with the assigned set of the parameters:
+Example of obtaining an image with the assigned set of parameters:
   <nowiki>http://192.168.0.9/axis-cgi/jpg/image.cgi?resolution=1024x768&colorlrvel=45&compression=30</nowiki>
@@ Line 54: / Line 58: @@
 ==Video stream==
-Cameras allow to obtain the continuous video stream. This stream can be transferred by two protocols - HTTP and RTP.
+The cameras can be used to receive a continuous video stream. This stream can be transferred by two protocols - HTTP and RTP.
 ===HTTP===
 ====Jpeg====
-The stream is sequence of jpeg-files, separated by special marking line. This transfer format is named Multipart Jpeg or MPJPG. For stream obtaining in this format you can use the next path:
+The stream is a sequence of jpeg-files, separated by a special marking line. This transfer format is named Multipart Jpeg or MPJPG. For receiving a stream in this format you can use the following path:
   <nowiki>http://192.168.0.9/mjpg/video.mjpg</nowiki>
-As for the static images, you can assign any parameters for video stream too. For it you can use the next path:
+As with static images, you can also assign parameters for the video stream. For this you can use the following path:
   <nowiki>http://192.168.0.9/axis-cgi/mjpg/video.cgi?param1=xxx&param2=yyy&.....</nowiki>
-Except the parameters, enumerated above, such as '''resolution, compression, colorlevel, color, rotation''', you can assign also:
+Apart from the parameters, enumerated above, such as '''resolution, compression, colorlevel, color, rotation''', you can also assign:
 '''duration=<int>'''    Specifies for how many seconds the video will be generated and pushed to the client. 0 = unlimited.
@@ Line 70: / Line 74: @@
 '''fps=<int>'''    Using fps it is possible to specify the frame rate from the server. 0 = unlimited.
-By default all these parameters are assigned to 0. You can change the default settings, for example, by this way:
+By default all these parameters are assigned to 0. You can change the default settings, for example, in this way:
   <nowiki>http://192.168.0.9/axis-cgi/admin/param.cgi?action=update&Image.I0.Stream.Duration=100&Image.I0.Stream.FPS=5&Image.I0.Stream.NbrOfFrames=1000</nowiki>
-Except the standard parameters, enumerated above, there is extensions, which allow to use the Elphel cameras more flexibly. More detailed information about these extensions you can read at [[Video API Extensions]].
+Apart from the standard parameters, enumerated above, there are extensions, which allow you to use the Elphel cameras more flexibly. More detailed information about these extensions can be found at [[Video API Extensions]].
-On page [[Video API And Client Applications]] you can find the information about players, which can play the MPJPG video stream.
+On the page [[Video API And Client Applications]] you can find some information about players, which can play the MPJPG video stream.
 ====Theora====
@@ Line 81: / Line 85: @@
 ===RTP===
+====Video Parameters====
+Note that due to obscure reasons, parameters set via
+<pre>
+http://192.168.0.9/axis-cgi/admin/param.cgi?action=update&root.ImageSource.I0.Sensor...=...
+</pre>
+will not take effect for RTP streams until the camera is restarted, although they will take effect immediately for videos streamed directly via HTTP.
+You can access the list of parameters used for RTP streaming, by accessing the following URL:
+<pre>
+http://192.168.0.9/axis-cgi/admin/param.cgi?action=list&group=ImageSource.I0.E_CurrentState
+</pre>
 ====Jpeg====
-Each jpeg-file is divided into many files with size less than 1500 bytes and are transferred by RTP/UDP protocol through the network. In this case the data transmission is substantially accelerated, but falls the reliability of transfer, which can bring in the overloaded networks to the loss of certain quantity of video data.
+Each jpeg-file is divided into many files with a size less than 1500 bytes which are transferred by RTP/UDP protocol through the network. In this case the data transmission is substantially accelerated, but the reliability of transfer falls, which can overload some networks and lead to the loss of a certain amount of video data.
-On page [[Video API And Client Applications]] you can find the information about players, which can play the RTP/JPEG stream.
+On the page [[Video API And Client Applications]] you can find information about players, which can play the RTP/JPEG stream.
 =====Multicast=====
-For video stream obtaining by RTP/Multicast it is enough to set the special variable:
+To obtain a video stream using RTP/Multicast it is sufficient to set the special variable:
-  <nowiki>http://192.168.0.9/axis-cgi/admin/param.cgi?action=update&Network.RTP.R0.AlwaysMulticast=yes</nowiki>
+  <nowiki>http://192.168.0.9/axis-cgi/admin/param.cgi?action=update&Network.RTP.R0.MulticastAlways=yes</nowiki>
-Will be generated the video stream with the default settings of variables for Multicast address, destination port and TTL. These variables can be changed by the next way:
+The video stream will be generated with the default settings of variables for Multicast address, destination port and TTL. These variables can be changed by the following way:
   <nowiki>http://192.168.0.9/axis-cgi/admin/param.cgi?action=update&Network.RTP.R0.VideoAddress=224.21.23.44&Network.RTP.R0.VideoPort=22222&Network.RTP.R0.TTL=90</nowiki>
+Please note that while <tt>Network.RTP.R0.MulticastAlways</tt> is enabled, the HTTP MJPEG interface will become very slow. So you might want to disable it if not used by your application.
 ======SDP======
-This video stream can be obtained, recorded or played by the MPlayer, QuickTime, vic (from the mush package). For this it is necessary to obtain the SDP-file from camera:
+This video stream can be received, recorded or played back by MPlayer, QuickTime, vic (from the mush package). For this it is necessary to obtain the SDP-file from camera:
   <nowiki>http://192.168.0.9/mjpg/media.sdp</nowiki>
-The saved file should be transfered to your preferred player. For example:
+The saved file should be transferred to your preferred player. For example:
   <nowiki>mplayer sdp://media.sdp</nowiki>
 ======RTSP======
-The original Axis Video API specification not support the RTSP in Multicast mode. In the Elphel cameras this possibility is added as protocol extension.
+The original Axis Video API specification does not support RTSP in Multicast mode. In the Elphel cameras this possibility has been added as a protocol extension.
 =====Unicast=====
@@ Line 106: / Line 127: @@
-== Obtaining the information about system functioning ==
+== Obtaining information about system functioning ==
-You can obtain the information about system at the address:
+You can obtain information about the system at the address:
   <nowiki>http://192.168.0.9/axis-cgi/admin/systemlog.cgi</nowiki>
 or more detailed information at the address:
@@ Line 113: / Line 134: @@
 == Date and Time ==
-=== Obtaining of the Date and Time ===
+=== Retrieving the Date and Time ===
-To see the time which is setuped inside the camera you can at the address:
+To see the time which is stored inside the camera you can use the address:
   <nowiki>http://192.168.0.9/axis-cgi/admin/date.cgi?action=get</nowiki>
-=== Date and Time setuping ===
+=== Setting Date and Time ===
-For date and time setuping is necessary to use the next parameters:
+For setting the date and time you must use the following parameters:
 {|
@@ Line 142: / Line 163: @@
-== Users administration ==
+== User administration ==
-Video API allow:
+The Video API allows:
-*the registering and deleting of users
+*registration and deleting of users
-*changing of users passwords
+*changing user passwords
-*adding of users to special groups
+*adding users to special groups
-=== Deleting of user ===
+=== Deleting a user ===
   <nowiki>http://192.168.0.9/axis-cgi/admin/pwdgrp.cgi?action=remove&user=joe</nowiki>
-=== Creating of the new user ===
+=== Creating a new user ===
   <nowiki>http://192.168.0.9/axis-cgi/admin/pwdgrp.cgi?action=add&user=joe&pwd=PASSWD&grp=axuser&sgrp=axview&comment=JOE</nowiki>
-Creating of the new users is slightly different for Elphel and Axis cameras. So, all created users which will have the access to camera through Video API are MUST belong to '''axoper''' group. Also these users must belong to one or more secondary groups:
+Creating a new user is slightly different for Elphel and Axis cameras. All created users which will have the access to camera through Video API MUST belong to the '''axoper''' group. Also these users must belong to one or more secondary groups:
 {|
 |-
@@ Line 161: / Line 182: @@
 |-
 |}
-At the same time is necessary the special attention, because the users which have the Administrator rights must be entered to all three groups, users which have the Operator rights must be entered to axoper and axview groups, users which have the Unprivileged user rights must be entered to axview group only.
+At the same time it is necessary to pay special attention, because users who have Administrator rights must be entered into all three groups, users who have Operator rights must be entered into the axoper and axview groups, users who have Unprivileged user rights must be entered into the axview group only.
 Creating of three users with different rights, for example:
 *Administrator:
@@ Line 179: / Line 200: @@
-== Camera rebooting ==
+== Rebooting the camera ==
-For camera rebooting, you should use the next address:
+For camera rebooting, you should use the following address:
   <nowiki>http://192.168.0.9/var/axis-cgi/admin/restart.cgi</nowiki>
-== Control of exposure ==
+== Exposure control ==
-The Elphel cameras support the control of exposure with standard and advanced interface. About advanced settings you can read at page [[Video_API_Extensions]]
+The Elphel cameras support exposure control with the standard and advanced interface. You can read about Advanced Settings on the page [[Video_API_Extensions]]
 === Autoexposure ===
-For enabling the autoexposure you can use the next command:
+To enable autoexposure you can use the following command:
   <nowiki>http://192.168.0.9/axis-cgi/admin/param.cgi?action=update&ImageSource.I0.Sensor.Exposure=auto</nowiki>
 ==== Autoexposure parameters ====
-It is possible to assign the area for autoexposure calculating. You can do it by the next command:
+It is possible to assign the area for autoexposure calculation. You can do this using the following command:
   <nowiki>http://192.168.0.9/axis-cgi/admin/param.cgi?action=update&ImageSource.I0.Sensor.ExposureWindow=full</nowiki>
 The ExposureWindow can have the values '''full''', '''center''', '''lower''', '''upper''', '''right''' and '''left'''.
+Also it possible set a maximum exposure time (number of micro seconds) :
+ <nowiki>http://192.168.0.9/axis-cgi/admin/param.cgi?action=update&root.ImageSource.I0.Sensor.MaxExposureTime=150000</nowiki>
 === Manual control of exposure ===
-For enabling the manual control of exposure you can use the next command:
+To enable manual control of exposure you can use the following command:
   <nowiki>http://192.168.0.9/axis-cgi/admin/param.cgi?action=update&ImageSource.I0.Sensor.Exposure=manual</nowiki>
+Also you can set the time an image is exposed (0.1 msec step):
+ <nowiki>http://192.168.0.9/axis-cgi/admin/param.cgi?action=update&root.ImageSource.I0.Sensor.Shutter=50</nowiki>
+'''For example''' Shutter=50 means 5000 microseconds or 5 miliseconds.
+== Troubleshooting ==
+If your attempts to access images fail with <tt>500 Server Error</tt>, you may have to explicitely [[Change API|enable the Video API]].

Difference between revisions of "Video API legacy"

Latest revision as of 15:42, 24 August 2008

Contents

Information about image dimensions

Static images

Video stream

HTTP

Jpeg

Theora

RTP

Video Parameters

Jpeg

Multicast

SDP

RTSP

Unicast

RTSP

Theora

Obtaining information about system functioning

Date and Time

Retrieving the Date and Time

Setting Date and Time

User administration

Deleting a user

Creating a new user

Password changing

Changing the access rights for secondary group

Rebooting the camera

Exposure control

Autoexposure

Autoexposure parameters

Manual control of exposure

Troubleshooting

Navigation menu

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