VAPIX® VERSION 3
Video Streaming API
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COPYRIGHT NOTICE
This document is copyright protected and is the property of Axis Communications AB and may not be copied, reproduced or
distributed in any way without the prior written consent of Axis Communications AB.
VAPIX® LICENSE AGREEMENT
This VAPIX® License Agreement (“License”) is a legal agreement between you (either individual or an entity) and Axis Communications
AB (“Axis”). By using the INTERFACE and INTERFACE DESCRIPTION (each defined below), whether in whole or in part, you agree to be
bound by the terms of this License.
1. GRANT OF LICENSE
Axis hereby grants to you the right to use the AXIS VAPIX application programming interface (“INTERFACE”) and the written
specification of the INTERFACE (the “INTERFACE DESCRIPTION”) for the sole and limited purpose of creating, manufacturing and
developing a solution that integrates any unit or portion included in the product range of Axis network products, as defined by Axis at
its discretion (an “Axis Product”) and to market, sell and distribute any such solution.
2. COPYRIGHT
The INTERFACE and the INTERFACE DESCRIPTION are owned by Axis and are protected by copyright laws and international treaty
provisions. Any use of the INTERFACE and/or the INTERFACE DESCRIPTION outside the limited purpose set forth in Section 1
above is strictly prohibited.
3. RESTRICTIONS ON USE
You have no rights with respect to the INTERFACE, INTERFACE DESCRIPTION or any portions thereof and shall not use the INTERFACE,
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disassemble the INTERFACE except to the extent required to obtain interoperability with other independently created computer
programs as permitted by mandatory law.
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your solution and the consequences thereof. Axis Products may be combined with a virtually infinite number of potential solutions.
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which integrate Axis products, or which result from the combination of Axis products and additional technology or solutions and (ii)
you are responsible for ensuring that any solution which integrates with an Axis Product, or a combination of a solution and an Axis
product, does not infringe upon or misappropriate any intellectual property or personal right of any third party.
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fail to comply with any term(s) of this License. Upon the termination of this License, you shall cease all use and disposition of the
INTERFACE and/or THE INTERFACE DESCRIPTION whether for the purpose set forth in Section 1 above or not.
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property rights; and (ii) your use of the INTERFACE and INTERFACE DESCRIPTION will comply with all applicable foreign and
domestic laws, rules and regulations.
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OF CHARGE AND "AS IS" WITHOUT WARRANTY OF ANY KIND. THE ENTIRE RISK AS TO THE USE, RESULTS AND PERFORMANCE
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WHETHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY,
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OUT OF ANY PROPOSAL, SPECIFICATION OR SAMPLE WITH RESPECT TO THE INTERFACE AND THE INTERFACE DESCRIPTION.
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or warranty that the integration of Axis Products into your solution does not infringe any third party rights. You are solely
responsible for any intellectual property infringement claims that are based on or relate to solutions created, manufactured
and distributed by you which integrate Axis Products. Axis is unaware of the details regarding your particular solution,
has not conducted any investigation relating to potential third party rights issues relating to your solution and does not
accept any responsibility or liability with respect thereto.
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FOR (I) EXAMINING WHETHER THE INTERFACE AND THE INTERFACE DESCRIPTION ARE ENCUMBERED BY OR INFRINGES UPON
A RIGHT HELD BY A THIRD PARTY AND (II) ANY INTELLECTUAL PROPERTY INFRINGEMENT CLAIMS THAT ARISE OUT OF OR
RELATE TO SOLUTIONS CREATED, MANUFACTURED AND DISTRIBUTED BY YOU WHICH INTEGRATE AXIS PRODUCTS.
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7. LIMITATION OF LIABILITY
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FOR ANY OTHER CONSEQUENTIAL, ECONOMIC OR INDIRECT LOSS WHATSOEVER IN RESPECT OF USE OR DISPOSITION OF THE
INTERFACE AND THE INTERFACE DESCRIPTION.
7.2. AXIS TOTAL LIABILITY FOR ALL CLAIMS IN ACCORDANCE WITH THE USE OF THE INTERFACE AND THE INTERFACE DESCRIPTION
SHALL NOT EXCEED THE PRICE PAID FOR THE INTERFACE AND THE INTERFACE DESCRIPTION.
7.3. YOU UNDERTAKE NOT TO PURSUE ANY CLAIMS WHATSOEVER AGAINST AXIS OR ITS AFFILIATES RELATING TO OR EMANATING
FROM THE INTERFACE AND THE INTERFACE DESCRIPTION OR YOUR INTEGRATION OF AN AXIS PRODUCT INTO YOUR SOLUTION.
8. INDEMNIFICATION
You will indemnify and hold Axis, its subsidiaries, affiliates, officers, employees, and agents harmless from any and all claims,
damages, losses, liabilities, actions, judgments, costs, and expenses brought by a third party, including claims for infringement of
intellectual property rights, arising out of or in connection with (i) your use of the INTERFACE or INTERFACE DESCRIPTION other
than in accordance with the terms of this agreement, and/or (ii) any solution created, manufactured and/or developed by you which
integrates an Axis Product.
9. GOVERNING LAW
This agreement shall be deemed performed in and shall be construed by the laws of Sweden. All disputes in connection with
this agreement shall be finally settled by arbitration in accordance with the Rules of the Arbitration Institute of the Stockholm
Chamber of Commerce. The place of arbitration shall be Malmö, Sweden. The language of the proceedings, documentation and
the award shall be English.
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Table of Contents
1
2
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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1.1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.1.1 References . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2 Unknown Arguments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Video Streaming Over HTTP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.1 Prerequisites . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.1.1 Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2 Common Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.3 Image Resolution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.3.1 Image Resolution Request . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.3.2 Image Resolution Response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.4 Video Status . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.4.1 Video Status Request . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.4.2 Video Status Response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.5 Bitmap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.5.1 Bitmap Image Request . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.5.2 Bitmap Image Response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.6 JPEG/Motion JPEG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.6.1 JPEG Image (Snapshot) CGI Request . . . . . . . . . . . . . . . . . . . . . . . 11
2.6.2 JPEG Image Response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
2.6.3 Motion JPEG Video CGI Request . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.6.4 Motion JPEG Video Response . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
2.7 Image Request Arguments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
RTSP API . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.1 Prerequisites . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.1.1 Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.2 RTSP Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.2.1 Request Syntax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
3.2.2 Response Syntax . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3.2.3 RTSP DESCRIBE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3.2.4 SDP Media Attribute Transform . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.2.5 RTSP OPTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
3.2.6 RTSP SETUP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
3.2.7 RTSP PLAY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
3.2.8 RTSP PAUSE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
3.2.9 RTSP TEARDOWN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
3.2.10 RTSP SET_PARAMETER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
3.3 RTSP Over HTTP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
3.3.1 Network Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
3.4 Parameter Specification RTSP URL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
3.5 Error Messages RTSP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
3.6 RTCP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Always Multicast . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
4.1 Prerequisites . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
4.1.1 Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
4.2 SDP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
4.2.1 Request SDP URL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
4.2.2 Response SDP URL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Stream Profiles . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
5.1 Prerequisites . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
5.1.1 Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
5.2 Common Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
5.3 Stream Profile Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
5.4 Motion JPEG Video Request . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
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Table of Contents
5.5 RTSP Request . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
© 2008 - 2013 Axis Communications AB. AXIS COMMUNICATIONS, AXIS, ETRAX, ARTPEC and VAPIX are registered trademarks or
trademark applications of Axis AB in various jurisdictions. All other company names and products are trademarks or registered
trademarks of their respective companies. We reserve the right to introduce modifications without notice.
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the prior written consent of Axis Communications AB.
1 Overview
1.1 Description
This document explains the basic arguments and parameters to send, receive and configure a video stream using HTTP or RTSP requests.
1.1.1 References
All VAPIX® references are available at:
1.2 Unknown Arguments
If an unknown argument is requested, for example if an argument is misspelled it will be ignored by the built-in server in the Axis
product. That means that no response feedback will be given.
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2 Video Streaming Over HTTP
The HTTP-based video interface provides the functionality for requesting single and multipart images and for getting and setting
internal parameter values. The image and CGI requests are handled by the built-in web server.
2.1 Prerequisites
2.1.1 Identification
Property: Properties.API.HTTP.Version=3
Firmware: 5.00 and later.
2.2 Common Examples
Example 1:
Check supported VAPIX® version.
Example 2:
Check supported resolutions.
Example 3:
Check supported image formats.
Example 4:
Check the default resolution of video source 1.
Example 5:
Request a Motion JPEG video stream.
2.3 Image Resolution
By using the imagesize.cgi you can find out the real image resolutions depending on the video format (PAL/NTSC). You can also
verify that desired resolution as well as resolution after rotation.
2.3.1 Image Resolution Request
The imagesize.cgi is used to retrieve the image resolution.
Access control: viewer
Method: GET/POST
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Syntax:
http://<servername>/axis-cgi/imagesize.cgi?
camera=<value>[&<argument>=<value>...]
With the following arguments and values:
Argument
Description
Any image argument.
Example 6:
Check the default resolution of video source 1.
Request:
Response:
image width = 720
image height = 576
Example 7:
Request a specific resolution with supplied parameters for video source 1.
Request:
&squarepixel=1&camera=1
Response:
image width = 192
image height = 144
2.3.2 Image Resolution Response
When an image resolution is requested, the Axis product either returns a resolution value or an error.
2.3.2.1 Successful Request
The image height and width in pixels are returned after a successful request.
Response:
HTTP Code: 200 OK
Content-Type: text/plain
Body:
image width=<value>
image height=<value>
2.3.2.2 Failure
If an Axis product does not support the requested resolution a body text is returned with info. For example <!-- Camera 1
not available. -->.
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Response:
HTTP Code: 200 OK
Content-Type: text/plain
Body (value for argument "camera" is specified):
<!-- [error message] -->
Body (value for argument "camera" is not specified):
[error message]
2.4 Video Status
This section only applies to video encoders. The videostatus.cgi is used to check the status of one or more video sources.
2.4.1 Video Status Request
Request the status information for the video sources. The number of video sources in an Axis product is defined by the parameter
ImageSource.NbrOfSources.
Access control: viewer
Method: GET
Syntax:
http://<servername>/axis-cgi/videostatus.cgi?<argument>=<value>
With the following argument and values:
Argument
Valid values
Description
status=<int>[[,<int>],...]
1. Product-dependent.
1 ...1
Check status of the listed video sources.
2.4.2 Video Status Response
Get the status information for the video sources.
Response:
HTTP Code: 200 OK
Content-Type: text/plain
Body:
Video 1 = <information>
...
<information> could be either video or no video.
Example 8:
Request video status from video source 1, 2, 3 and 4.
Response:
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Returned data after a successful request.
HTTP Code: 200 OK
Content-Type: text/plain
Body:
Video 1 = video
Video 2 = no video
Video 3 = no video
Video 4 = video
The response no video means that there is no analog video signal attached to the physical video input port.
2.5 Bitmap
Support for bitmap images is product-dependent. Use the following command to check supported image formats.
Response example:
properties.image.format=jpeg,mjpeg,h264,bitmap
The response shows that the Axis product in the example supports bitmap images.
2.5.1 Bitmap Image Request
The syntax bitmap/image.bmp is used to request a bitmap image.
Access control: viewer
Method: GET
Syntax:
http://<servername>/axis-cgi/bitmap/image.bmp
[?<argument>=<value<[&<argument>=<value>...]]
With the following arguments and values:
Argument
Description
Bitmap image arguments.
Example 9:
Request a bitmap image from the default video source using default settings.
Example 10:
Request a bitmap image from video source 1 with resolution 320x240.
2.5.2 Bitmap Image Response
When a bitmap image is requested, the Axis product either returns the specified bitmap image file or an error.
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2.5.2.1 Successful Request
Successful response to a HTTP request.
Response:
HTTP Code: 200 OK
Content-Type: image/bitmap
Content-Length: <image size in bytes>
Body:
<bitmap image data>
2.6 JPEG/Motion JPEG
The requests specified in this section refer to Axis products that are set to use JPEG and Motion JPEG encoding.
2.6.1 JPEG Image (Snapshot) CGI Request
The jpg/image.cgi is used to request a JPEG image (snapshot). A JPEG image (snapshot) should only be used when requiring
less than 1 fps.
Access control: viewer
Method: GET
Syntax:
http://<servername>/axis-cgi/jpg/image.cgi
[?<argument>=<value>[&<argument>=<value>...]]
With the following arguments and values:
Argument
Description
JPEG image arguments.
Example 11:
Request a JPEG image from video source 1 with resolution 320x240 and compression 25.
&compression=25&camera=1
Example 12:
Request a JPEG image from video source 2 with the text My Camera displayed.
&text=1&textstring=My%20Camera&camera=2
2.6.2 JPEG Image Response
When a JPEG image is requested, the Axis product either returns the specified JPEG image or an error.
2.6.2.1 Successful Request
Successful response to a HTTP request.
Response:
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HTTP Code: 200 OK
Content-Type: image/jpeg
Content-Length: <image size in bytes>
Body:
<JPEG image data>
2.6.3 Motion JPEG Video CGI Request
The mjpg/video.cgi is used to request a Motion JPEG video stream with specified arguments. The arguments can be specified
explicitly, or a predefined stream profile can be used. Image settings saved in a stream profile can be overridden by specifying
new settings after the stream profile argument.
Access control: viewer
Method: GET
Syntax:
http://<servername>/axis-cgi/mjpg/video.cgi
[?<argument>=<value>[&<argument>=<value>...]]
In addition to the arguments described in 2.7 Image Request Arguments, on page 13 mjpg/video.cgi accepts the follwing
arguments.
Argument
Valid values
Description
streamprofile=<string>
<stream profile name>
Use a predefined stream profile.
Supported stream profile names are stored
in the StreamProfile.S#.Name
parameters.
duration=<int>
An unsigned integer
Specifies for how many seconds the video
will be generated and pushed to the
client.
0=unlimited.
nbrofframes=<int>
fps=<int>
An unsigned integer
An unsigned integer
Specifies how many frames the Axis
product will generate and push.
0=unlimited.
Using fps it is possible to specify the
frame rate from the Axis product.
0=unlimited.
Example 13:
Request a Motion JPEG video stream from video source 1 with resolution 320x240 and compression 25.
&compression=25&camera=1
Example 14:
Request a Motion JPEG video stream from the default video source with frame rate 5.
Example 15:
Request a Motion JPEG video stream using the myprofile stream profile but with a lower resolution.
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streamprofile=myprofile&resolution=CIF
2.6.4 Motion JPEG Video Response
When a Motion JPEG video is requested, the Axis product either returns the specified Motion JPEG video or an error.
2.6.4.1 Successful Request
If the request was successful, the Axis product returns a continuous flow of JPEG images. The content type is
multipart/x-mixed-replace and each image ends with a boundary string <boundary>.
Response:
HTTP Code: 200 OK
Content-Type: multipart/x-mixed-replace; boundary=<boundary>
Body:
--<boundary>
<image>
--<boundary>
<image>
Where the returned <image> field is:
Content-Type: image/jpeg
Content-Length: <image size in bytes>
<JPEG image data>
2.7 Image Request Arguments
The following arguments and values can be used in JPEG, Motion JPEG or bitmap CGI requests. Unless overridden by a argument it is
the default values as configured via the GUI (or param.cgi) that decides the characteristics of the image or video.
Argument
Valid values
Description
A string1
Resolution of the returned image. For
supported resolutions, check in parameter
Properties.Image.Resoluti-
on.
resolution=<string>
camera=<string>
1 ...
quad
Selects the video source. If omitted the
default value camera=1 is used. This
argument is only valid for Axis products
with more than one video source. That
is cameras with multiple view areas
and video encoders with multiple video
channels.
compression=<int>
0 ... 100 1
Adjusts the compression level of the
image. Higher values correspond to
higher compression, that is lower quality
and smaller image size. Note: This value
is internally mapped and is therefore
product-dependent.
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rotation=<int>
0
Rotate the image clockwise. The number
of rotation alternatives in an Axis
product is defined by the parameter
Properties.Image.Rotation.
901
1801
2701
squarepixel=<int>
0
1
Enable/disable square pixel (aspect ratio)
correction. If the parameter is set to 1
the Axis product will adjusts the aspect
ratio to make it appear as intended.
1. Product/release-dependent.
Note
For arguments concerning overlays refer to the Overlay document available at:
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the prior written consent of Axis Communications AB.
3 RTSP API
RTSP (Real Time Streaming Protocol) is a control protocol for media streams delivered by a media server. RTSP can be considered a
“remote control” providing commands such as play and pause. In addition, RTSP API provides parameters controlling media stream
properties such as resolution, compression, video bit rate and audio as well as parameters controlling the image settings.
Please refer to the release notes for the actual product for compliance information.
The RTSP server in the Axis products is based on RFC 2326 Real Time Streaming Protocol (RTSP), RFC 4566 SDP: Session Description
Protocol and RFC 3550 RTP: A Transport Protocol for Real-Time Applications.
When streaming both video and audio the audio and video can be synchronized by using RTP timestamps as described in RFC 3550.
3.1 Prerequisites
3.1.1 Identification
Property: Properties.API.RTSP.Version=2.01 and later
Property: Properties.API.RTSP.RTSPAuth=yes
3.2 RTSP Commands
The RTSP API provides several commands for media stream control.
3.2.1 Request Syntax
Syntax:
COMMAND rtsp://<servername>/axis-media/media.amp
[?<parameter>=<value>[&<parameter>=<value>...]] RTSP/1.0<CRLF>
Headerfield1: val1<CRLF>
Headerfield2: val2<CRLF>
...
<CRLF>
[Body]
COMMAND is any of DESCRIBE, SETUP, OPTIONS, PLAY, PAUSE, TEARDOWN, SET_PARAMETER or GET_PARAMETER. Lines
are separated with Carriage Return and Line Feed (CRLF).
Supported RTSP URL parameters and their values are listed in section3.4 Parameter Specification RTSP URL.
Note
RTSP requests always contain the absolute URL.
The following header fields are accepted by all commands. Some commands accept or require additional header fields:
Header Field
Description
Authorization
CSeq
Authorization information from the client.
Request sequence number.
Session
Session identifier (returned by the Axis product in SETUP
response).
Content-Length
Length of content.
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Content-Type
User-Agent
Require
The media type of the content.
Information about the client that initiates the request.
Query whether an option is supported. Unsupported features
are listed in the Unsupported header field. See example 2 in
3.2.2 Response Syntax
Syntax:
RTSP/1.0 <Status Code> <Reason Phrase> <CRLF>
Headerfield1: val3<CRLF>
Headerfield2: val4<CRLF>
...
[Body]
The first response line contains a status code and a reason phrase indicating the success or failure of the request. The status codes
are described in RFC 2326.
The following header fields can be included in all RTSP response messages:
Header Field
Description
CSeq
Response sequence number (matches the sequence number of
the request).
Session
Session identifier.
WWW-Authenticate
Date
Authentication from client requested.
Date and time of the response.
Features not supported by the Axis product.
Unsupported
3.2.3 RTSP DESCRIBE
The DESCRIBE command is used to request an SDP description of the media stream(s). The Session Description Protocol (SDP) is
described in RFC 2327.
The DESCRIBE request accepts the additional header field:
Header Field
Description
Accept
List of content types that client supports (application/sdp
is the only supported type).
The response to the DESCRIBE command contains the additional header fields:
Header Field
Description
Content-Type
Type of content (application/sdp).
Length of SDP description.
Content-Length
Content-Base
If relative URLs are used in the SDP description, this is the base
URL.
Example 1:
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Request:
DESCRIBE rtsp://myserver/axis-media/media.amp
?videocodec=h264&resolution=640x480 RTSP/1.0
CSeq:
0
User-Agent: Axis AMC
Accept: application/sdp
Response:
RTSP/1.0 200 OK
CSeq:
0
Content-Type: application/sdp
Content-Base: rtsp://myserver/axis-media/media.amp/
Date: Wed, 16 Jul 2008 12:48:47 GMT
Content-Length: 847
v=0
o=- 1216212527554872 1216212527554872 IN IP4 myserver
s=Media Presentation
e=NONE
c=IN IP4 0.0.0.0
b=AS:50064
t=0 0
a=control:rtsp://myserver/axis-media/media.amp?videocodec=h264
&resolution=640x480
a=range:npt=0.000000-
m=video 0 RTP/AVP 96
b=AS:50000
a=framerate:30.0
a=transform:1,0,0;0,1,0;0,0,1
a=control:rtsp://myserver/axis-media/media.amp/trackID=1?videocodec=h264
&resolution=640x480
a=rtpmap:96 H264/90000
a=fmtp:96 packetization-mode=1; profile-level-id=420029;
sprop-parameter-sets=Z0IAKeKQFAe2AtwEBAaQeJEV,aM48gA==
m=audio 0 RTP/AVP 97
b=AS:64
a=control:rtsp://myserver/axis-media/media.amp/trackID=2
?videocodec=h264&resolution=640x480
a=rtpmap:97 mpeg4-generic/16000/1
a=fmtp:97 profile-level-id=15; mode=AAC-hbr;config=1408; SizeLength=13;
IndexLength=3;IndexDeltaLength=3; Profile=1; bitrate=64000;
3.2.4 SDP Media Attribute Transform
Depending on product model, the SDP file may contain a video media attribute transform. If the streamed video is rotated or
mirrored from the image source, this video media attribute shows how the video stream is orientated in relation to the original image
configuration. The orientation is described by a transformation matrix consisting of homogeneous coordinates for two-dimensional
operations (a 3x3 matrix).
Syntax:
a=transform:<MATRIX>
The matrix is formatted using commas to separate columns and semicolons to separate rows.
Example 2:
A video stream which is rotated 90 degrees is described by:
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a=transform:0,-1,0;1,0,0;0,0,1
3.2.5 RTSP OPTIONS
The OPTIONS request returns a list of supported RTSP commands. The command can be used to keep RTSP sessions alive by
repeating the OPTIONS request at regular intervals. The session timeout time is specified by the timeout parameter returned from
The response to the OPTIONS command contains the additional header field:
Header field
Description
Public
Specify the supported RTSP commands.
Example 3:
List supported commands. The asterisk (*) makes the request apply to the server and not to a particular URL.
Request:
OPTIONS * RTSP/1.0
CSeq:
1
User-Agent: Axis AMC
Session: 12345678
Response:
RTSP/1.0 200 OK
CSeq:
1
Session: 12345678
Public: DESCRIBE, GET_PARAMETER, PAUSE, PLAY, SETUP, SET_PARAMETER, TEARDOWN
Date: Wed, 16 Jul 2008 12:48:48 GMT
Note
As indicated in the response, the GET_PARAMETER command is supported; there are however no parameters to retrieve.
3.2.6 RTSP SETUP
The SETUP command is used to configure the data delivery method.
The SETUP request requires an additional header field which is also included in the response:
Header field
Description
Transport
Specify how the data stream is transported. Supported variants
are:
RTP/AVP;unicast;client_port=port1-port2
RTP/AVP;multicast;client_port=port1-port2
RTP/AVP/TCP;unicast
If using unicast in combination with TCP, it is recommended to increase the size of the RTP packets to 64 000 bytes (from the standard
1500 bytes), provided that the client can accept larger packets. Also for unicast streaming over RTP/UDP it might be beneficial to
increase the packet size if no packets are dropped. The packet size is changed using the following header field in the SETUP request:
Header field
Description
Blocksize
Request a specific media packet size. The packet size should be
a positive decimal number measured in octets.
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The response returns a session identifier that should be used together with the stream control commands (for example PLAY,
PAUSE and TEARDOWN). If the session header includes the timeout parameter, the session will close after the timeout time unless
explicitly kept alive. Session can be kept alive by sending RTSP requests to the Axis product containing the session identifier (for
example OPTIONS, see 3.2.5 RTSP OPTIONS) within the timeout time or by using RTCP messages. Reconfiguration of transport
parameters is not supported.
Example 4:
The response to the first SETUP request returns the session identifier (Session) which is used in subsequent requests. The parameter
trackID should be read from DESCRIBE and used in SETUP.
Request:
SETUP rtsp://myserver/axis-media/media.amp/
trackID=1?videocodec=h264&resolution=640x480 RTSP/1.0
CSeq:
2
User-Agent: Axis AMC
Transport: RTP/AVP;unicast;client_port=20000-20001
Response:
RTSP/1.0 200 OK
CSeq:
2
Session: 12345678; timeout=60
Transport: RTP/AVP;unicast;client_port=20000-20001;
server_port=50000-50001;ssrc=B0BA7855;mode="PLAY"
Date: Wed, 16 Jul 2008 12:48:47 GMT
Example 5:
Request:
SETUP rtsp:///myserver//axis-media/media.amp/
trackID=2?videocodec=h264&resolution=640x480 RTSP/1.0
CSeq:
3
User-Agent: Axis AMC
Transport: RTP/AVP;unicast;client_port=20002-20003
Session: 12345678
Response:
RTSP/1.0 200 OK
CSeq:
3
Session: 12345678; timeout=60
Transport: RTP/AVP;unicast;client_port=20002-20003;
server_port=50002-50003;ssrc=D7EB59C0;mode="PLAY"
Date: Wed, 16 Jul 2008 12:48:48 GMT
3.2.7 RTSP PLAY
The PLAY request starts (or restarts if paused) the data delivery to the client.
Note
When playing Motion JPEG via RTSP there is a resolution limit of 2040x2040 pixels.
The response to the PLAY command contains the additional header fields:
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Header field
Description
Range
The play time period.
RTP-Info
Information about the RTP stream, including the sequence
number of the first packet of the stream.
Example 6:
Request:
PLAY rtsp://myserver/axis-media/media.amp
?videocodec=h264&resolution=640x480 RTSP/1.0
CSeq:
4
User-Agent: Axis AMC
Session: 12345678
Response:
RTSP/1.0 200 OK
CSeq:
4
Session: 12345678
Range: npt=0.645272-
RTP-Info: url=rtsp://myserver/axis-media/media.amp/
trackID=1?videocodec=h264&resolution=640x480;seq=46932;
rtptime=1027887748, url=rtsp://myserver/axis-media/media.amp/
trackID=2?videocodec=h264&resolution=640x480;seq=3322;rtptime=611053482
Date: Wed, 16 Jul 2008 12:48:48 GMT
Example 7:
Play the recording “myrecording”.
Request:
PLAY rtsp://myserver/axis-media/media.amp?recordingid=”myrecording” RTSP/1.0
CSeq:
4
User-Agent: Axis AMC
Session: 12345678
3.2.8 RTSP PAUSE
The PAUSE request is used to temporarily stop data delivery from the Axis product. Use PLAY to restart data delivery.
Example 8:
Request:
PAUSE rtsp://myserver/axis-media/media.amp
?videocodec=h264&resolution=640x480 RTSP/1.0
CSeq:
5
User-Agent: Axis AMC
Session: 12345678
Response:
RTSP/1.0 200 OK
CSeq:
5
Session: 12345678
Date: Wed, 16 Jul 2008 12:48:49 GMT
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3.2.8.1 RTSP PAUSE On Live Stream
If PAUSE is requested during live streaming the data transmission will stop immediately. If PLAY later is requested the live steam
starts on the latest sampled frame. That means that the client will lose the video during the time that the stream has been paused.
The client is notified in the Range header which interval that will be streamed.
3.2.9 RTSP TEARDOWN
The TEARDOWN request is used to close the data delivery from the Axis product.
Example 9:
Request:
TEARDOWN rtsp://myserver/axis-media/media.amp
?videocodec=h264&resolution=640x480 RTSP/1.0
CSeq:
6
User-Agent: Axis AMC
Session: 12345678
Response:
RTSP/1.0 200 OK
CSeq:
6
Session: 12345678
Date: Wed, 16 Jul 2008 12:49:01 GMT
3.2.10 RTSP SET_PARAMETER
The SET_PARAMETER command is used to change session parameters, currently only I-frame request is supported. The command
sets the Renew-Stream parameter to yes.
Note
Renew-Stream must be sent in the body. The corresponding Renew-Stream parameter in some firmware 4.xx products
had to be sent in the header. See example 2 below.
Example 10:
Use of SET_PARAMETER in firmware 5.xx products. Renew-Stream is sent in the body.
Request:
SET_PARAMETER rtsp://myserver/axis-media/media.amp RTSP/1.0
CSeq:
7
Session: 12345678
Content-Type: text/parameters
Content-Length: 19
Renew-Stream: yes
Response:
RTSP/1.0 200 OK
CSeq:
7
Session: 12345678
Date: Wed, 16 Jul 2008 13:01:25 GMT
Example 11:
In some older Axis products, I-frames were requested using RenewStream:yes in the header. To find out whether Renew-Stream
should be sent in the header or the body, the following method is recommended.
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Send a request with Require and RenewStream:yes in the header.
Request:
SET_PARAMETER rtsp://myserver/axis-media/media.amp RTSP/1.0
CSeq:
7
Session: 12345678
Require: com.axis.parameters-in-header
RenewStream: yes
If the request is successful (response 200 OK), the stream is renewed. Else, the Axis product responds with 551 Option not
supported (below) and RenewStream should be sent in the body.
Response:
RTSP/1.0 551 Option not supported
CSeq:
7
Session: 12345678
Unsupported: com.axis.parameters-in-header
Date: Wed, 16 Jul 2008 13:01:24 GMT
Send a second request with RenewStream:yes in the body.
Request:
SET_PARAMETER rtsp://myserver/axis-media/media.amp RTSP/1.0
CSeq:
8
Session: 12345678
Content-Type: text/parameters
Content-Length: 19
Renew-Stream: yes
Successful response.
Response:
RTSP/1.0 200 OK
CSeq:
8
Session: 12345678
Date: Wed, 16 Jul 2008 13:01:25 GMT
3.3 RTSP Over HTTP
RTSP can be tunnelled over HTTP. This might prove necessary in order to pass firewalls etc. To tunnel RTSP over HTTP, two sessions
are set up; one GET (for command replies and stream data) and one POST (for commands). RTSP commands sent on the POST
connection are base64 encoded, but the replies on the GET connection are in plain text. To bind the two sessions together the
Axis product needs a unique ID (conveyed in the x-sessioncookie header). The GET and POST requests are accepted on both the
HTTP port (default 80) and the RTSP server port (default 554).
Note
For further information information see http://developer.apple.com/quicktime/icefloe/dispatch028.html
Syntax:
http://<servername>/axis-media/media.amp
Supported methods are GET and POST.
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Example 12:
GET request.
Request:
GET axis-media/media.amp?videocodec=h264&audio=0 HTTP/1.0
x-sessioncookie: 123456789
Response:
HTTP/1.0 200 OK
Content-Type: application/x-rtsp-tunnelled
Example 13:
POST request. There is no response from the Axis product.
Request:
POST axis-media/media.amp?videocodec=h264&audio=0 HTTP/1.0
x-sessioncookie: 123456789
Content-Length: 32767
Content-Type: application/x-rtsp-tunnelled
After this request has been sent it is possible to send RTSP requests like below.
DESCRIBE rtsp://myserver/axis-media/media.amp?videocodec=h264 RTSP/1.0
CSeq: 14
User-Agent: Axis AMC
Accept: application/sdp
3.3.1 Network Parameters
The following parameters in the Network.RTSP group control RTSP authentication.
[Network.RTSP]
Parameter
Default
values
Valid values
Access control
Description
no1
yes
no
AuthenticateOverHTTP
admin: read
Perform a RTSP
authentication when
tunneling RTSP over HTTP.
yes=The RTSP server
requests authentication.
This is made regardless
if the HTTP-connection is
authenticated or not.
no=The RTSP server will
not request authentication.
It is assumed that the
HTTP-connection already is
authenticated.
1. Even if the current default behavior is not to require RTSP authentication when tunnelling through HTTP, this will probably change in the future.
It is therefore strongly recommended to implement RTSP Digest authentication for all clients that use RTSP over HTTP.
3.4 Parameter Specification RTSP URL
RTSP API provides parameters for requesting media streams with specific properties and for image settings. The parameters are
entered in the RTSP URL.
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Syntax:
rtsp://<servername>/axis-media/media.amp
[?<parameter>=<value>[&<parameter>=<value>...]]
The following parameters are supported for H.264, MPEG-4 Part 2 and Motion JPEG streams:
Parameter
Valid values
Description
videocodec
h264
The selected video codec.
Default: Product dependent; in order of
priority: h264 , mpeg4 , jpeg.
mpeg4
jpeg1
streamprofile
recordingid
resolution
A string
Name of a saved stream profile2.
Name of a saved recording.
A string
Product dependent
Specify the resolution of the returned
image.
audio
0
1
Specify whether audio shall be available
in the stream (for compatibility with
applications without audio control).
0 = No audio.
1 = Audio.
Default: 1
camera
1 ...
quad1
Select the video source or the quad
stream.
compression
0 … 1001
Adjust the compression level of the
image. Higher values correspond to
higher compression, that is lower image
quality and smaller image size.
Note: This value is internally mapped and
therefore product-dependent.
colorlevel1
0 … 1001
Set the level of color or grey scale.
0 = Grey scale.
100 = Full color.
Note: This value is internally mapped and
therefore product-dependent.
color
clock
date
0
1
Enable/disable color.
0 = Black and white.
1 = Color.
0
1
Show/hide the time stamp.
0 = Hide.
1 = Show.
0
1
Show/hide the date.
0 = Hide.
1 = Show.
text
0
1
Show/hide the text.
0 = Hide.
1 = Show.
textstring
textcolor
An URL-encoded string
Set the text shown in the image.
black
white
Set the color of the text shown in the
image.
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textbackgroundcolor
rotation
black
white
transparent
semitransparent
Set the color of the text background
shown in the image.
0
90
Rotate the image clockwise.
180
2701
textpos
0
1
The position of the string shown in the
image.
0 = Top.
1 = Bottom.
overlayimage
0
1
Enable/disable overlay image.
0 = Disable.
1 = Enable.
overlaypos=<int>,<int>
overlaypos=<int>x<int>3
Two unsigned integers
An unsigned integer
An unsigned integer
An unsigned integer
Set the x and y coordinates defining the
position of the overlay image.
duration
nbrofframes
fps
Set the number of seconds the video will
generate and push. 0 = Unlimited.
Set the number of frames the Axis product
will generate and push. 0 = Unlimited.
Set the frame rate from the Axis product.
0 = Unlimited.
pull=<bool>
0
1
Optional parameter when using PLAY.
1 = Stream as fast as possible. Because
the receiving part determines the transfer
rate, this is only useful when tunneling
RTSP over HTTP.
0 = Disabled. Default.
1. Values are product dependent. Check the product specification.
2. A stream profile is a set of video stream parameters (including videocodec) and is defined in the HTTP API or the web GUI. Supported stream
profile names are stored in the StreamProfile.S#.Name parameters. It is possible override parameter values saved in a stream profile
by specifying new values after the stream profile. See section for details.
3. Obsolete.
H.264 and MPEG-4 Part 2 streams support the following additional parameters:
Parameter
Valid values
Description
videobitrate
An integer
The rate (in kbits/s) at which video is
requested.
0 = Variable bit rate.
>0 = Constant bit rate with the given
target bit rate.
Default: 0
videomaxbitrate
An integer
Maximum bit rate (in kbits/s) for bit rate
control.
Default: 0
0 = Unlimited.
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none
framerate
videobitratepriority
videokeyframeinterval
The priority when rate control is used.
An integer
Corresponds to the GOV length setting in
the web GUI.
Default: 32, but product and codec
dependent.
Motion JPEG streams support the following additional parameter:
Parameter
Valid values
Description
squarepixel
0
1
Enable/disable square pixel (aspect ratio)
correction. If the parameter is set to 1
the Axis product will adjusts the aspect
ratio to make it appear as intended.
3.5 Error Messages RTSP
The error messages for RTSP are described in RFC 2326.
3.6 RTCP
RTP Control Protocol (RTCP) is implemented according to the standard in RFC 3550.
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4 Always Multicast
Always multicast means starting a multicast stream and letting it run continuously. Enabling always multicast reduces the latency
when connecting to an Axis product. The always multicast streams enabled on the Axis product are presented by a Session Description
Protocol (SDP). Using this information the client can choose to connect to the service.
4.1 Prerequisites
4.1.1 Identification
Property: Properties.API.HTTP.Version=3
Firmware: 5.40 and later.
4.2 SDP
The client makes a request according to the example below. The camera parameter specifies the desired video source on the
Axis product.
To make a SDP request it is required that Network.RTP.R0.AlwaysMulticastVideo=yes.
4.2.1 Request SDP URL
Request:
4.2.2 Response SDP URL
The Axis product responds the request with a SDP. The SDP is protected by the HTTP authentication of the Axis product and requires
admin access control.
Response:
v=0
o=- 1284464363092904 1284464363092904 IN IP4 axis
s=Multicast presentation
e=NONE
t=0 0
a=range:npt=0.000000-
m=video 50000 RTP/AVP 96
c=IN IP4 239.225.149.138/0
b=AS:50000
a=framerate:25.0
a=transform:1,0,0;0,1,0;0,0,1
a=rtpmap:96 H264/90000
a=fmtp:96 packetization-mode=1; profile-level-id=420029;
sprop-parameter-sets=Z0IAKeKQFgJNgScFAQXh4kRU,aM48gA==
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5 Stream Profiles
A stream profile is a set of video stream parameters suitable for different applications, devices or situations. Stream profiles can be
used when retrieving a video stream from Axis products using the HTTP API, the RTSP API or the web GUI. All parameters that can be
set in a video stream request can also be saved in a stream profile.
A few stream profiles are included at startup. The included stream profiles are designed according to basic requirements and can
be customized by users with appropriate access rights. Users can easily create new stream profiles when needed. User-created
profiles may also be removed.
Stream profiles are also used to define special image stream settings, for example for instant replay and events recording.
The stream profile API is an extension to the video stream CGI’s Stream profiles parameters are added, updated, listed and removed
using the parameter management CGI (param.cgi).
5.1 Prerequisites
5.1.1 Identification
Property: Properties.API.HTTP.Version=3
Firmware: 5.00 and later.
5.2 Common Examples
Example 1:
Add a new stream profile. In this example the new profile is the 5th stream profile so it will be referred to as StreamProfile.S4.
Request:
&template=streamprofile
&group=StreamProfile
Response:
S4 OK
Example 2:
Add and configure a stream profile in one request. Here the profile is named myprofile2 and the Parameters string is
on page 13 what arguments that could be used in the Parameters string.
Note
Characters in the Parameters string must be URL-encoded, so
resolution=CIF&text=1&textstring=CIF%20profile becomes
resolution%3dCIF%26text%3d1%26textstring%3dCIF%2520profile
The blank space is encoded as %20, the equal sign (=) as %3d, the ampersand (&) as %26 and the percent sign is encoded
as %25.
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the prior written consent of Axis Communications AB.
Request:
&template=streamprofile
&group=StreamProfile
&StreamProfile.S.Name=myprofile2
StreamProfile.S.Description=My%204CIF%20profile
&StreamProfile.S.Parameters=videocodec%3dh264
%26resolution%3d4CIF%26text%3d1%26textstring%3d4CIF%2520profile
Response:
S5 OK
Example 3:
Configure a stream profile. In this example the profile is named myprofile and the Parameters string contains the following
arguments: resolution=CIF, text=1 and textstring=CIF profile. See2.7 Image Request Arguments, on page 13 what
arguments that could be used in the Parameters string.
Note
Characters in the Parameters string must be URL-encoded, so
resolution=CIF&text=1&textstring=CIF%20profile becomes
resolution%3dCIF%26text%3d1%26textstring%3dCIF%2520profile.
The blank space is encoded as %20, the equal sign (=) as %3d, the ampersand (&) as %26 and the percent sign is encoded
as %25.
Request:
&StreamProfile.S4.Name=myprofile
&StreamProfile.S4.Description=My%20CIF%20profile
&StreamProfile.S4.Parameters=resolution%3dCIF%26text%3d1%26textstring%3dCIF%2520
profile
Response:
OK
Example 4:
List the parameters of a stream profile.
Request:
Response:
root.StreamProfile.S5.Name=myprofile2
root.StreamProfile.S5.Description=My%204CIF%20profile
root.StreamProfile.S5.Parameters=videocodec%3dh264
%26resolution%3d4CIF%26text%3d1
%26textstring%3d4CIF%2520profile
5.3 Stream Profile Parameters
The parameters in the StreamProfile group control stream profile settings.
29
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Video Streaming API
This document is copyright protected and is the property of Axis Communications AB and may not be copied, reproduced or distributed in any way without
the prior written consent of Axis Communications AB.
Note
In order to create a new dynamic parameter admin or operator access control is needed.
[StreamProfile.S#]
Template: streamprofile
Parameter
Valid values
Access control
Description
Name
A-Z
a-z
0-9
-, _
admin: read, write
operator: read, write
viewer: read
The name of the stream profile
used in the requests.
Note: Each profile must have
a unique name.
Description
Parameters
A string.
admin: read, write
operator: read, write
viewer: read
User-friendly description of
the profile.
<argument1>=<value1
>
&<argument2>=<valu-
e2>
admin: read, write
operator: read, write
viewer: read
List of arguments. See 2.7
complete list.
...
Note: The characters must be
URL-encoded.
Note
The # is replaced by a group number, for example StreamProfile.S5. The first group numbers are reserved for
stream profiles included in the product
5.4 Motion JPEG Video Request
Saved stream profiles are convenient when retrieving Motion JPEG video streams through video.cgi. The value of a parameter
saved in a stream profile can be overridden by specifying a new parameter value after the streamprofile argument.
Method: GET
Syntax:
http://<servername>/axis-cgi/mjpg/video.cgi
?<argument>=<value>[&<argument>=<value>...]
With the following arguments:
Argument
Valid values
Description
streamprofile=<string>
Name of stream profile
The name of the stream profile. Supported
stream profile names are stored in the
StreamProfile.S#.Name
parameters.
Additional arguments
See page 13 for a complete list.
Example 5:
Request, over HTTP, a Motion JPEG video stream configured according to the stream profile myprofile.
30
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Video Streaming API
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the prior written consent of Axis Communications AB.
Request:
5.5 RTSP Request
Saved stream profiles are also convenient when requesting video streams using RTSP. The value of a parameter saved in the stream
profile can be overridden in the RTSP request by specifying a new value after the streamprofile argument.
Syntax:
COMMAND rtsp://<servername>/axis-media/media.amp
?<argument>=<value>[&<argument>=<value>...] RTSP/1.0
Headerfield1: val1<CRLF>
Headerfield2: val1<CRLF>
...
<CRLF>
[Body]
With the following arguments:
Argument
Valid values
Description
streamprofile=<string>
Name of stream profile
The name of the stream profile. Supported
stream profile names are stored in the
StreamProfile.S#.Name
parameters.
Additional arguments
See page 23 for a complete list.
Example 6:
Stream profiles in RTSP requests. The value of a parameter saved in the stream profile can be overridden by specifying a new
parameter value after streamprofile. Here, myprofile2 (defined above) is used but the resolution is changed to 640x480.
Request:
DESCRIBE rtsp://myserver/axis-media/media.amp?
streamprofile=myprofile2&resolution=640x480 RTSP/1.0
CSeq:
0
User-Agent: Axis AMC
Accept: application/sdp
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