Cisco 8620, Справочное руководство

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Cisco Video Surveillance 8620/8630 IP Camera Reference Guide
Chapter 5 Configuration
Network > Streaming protocols
Note Microsoft Internet Explorer does not support server push technology; therefore, you will not be
able to access a video stream using http://
ip address : http port / access name for stream 1, 2, 3, 4 .
RTSP Streaming
To utilize RTSP streaming authentication, make sure that you have set a password for controlling the
access to video stream first. See the
“Security > User accounts” section on page 5-30 for details.
• Authentication—Depending on your network security requirements, the camera provides three
types of security settings for streaming via RTSP protocol: disable, basic, and digest. If basic
authentication is selected, the password is sent in plain text format, but there can be potential risks
of it being intercepted. If digest authentication is selected, user credentials are encrypted using MD5
algorithm, thus providing better protection against unauthorized access.
•
Access name for stream 1 ~ 4—This camera supports multiple streams simultaneously. The access
name is used to differentiate the streaming source. If you want to use an RTSP player to access the
camera, you have to set the video mode to H.264 or H.265 and use the following RTSP URL
command to request transmission of the streaming data.
rtsp:// ip address : rtsp port / access name for stream 1 to 4
For example, when the access name for stream 1 is set to live.sdp:
1.
Launch an RTSP player.
2.
Choose File > Open URL . A URL dialog box will pop up.
3. Type the above URL command in the text box.
4.
The live video will be displayed in your player.
• RTSP port; RTP port for video, metadata, audio; RTCP port for video, metadata, audio:
–
RTSP (Real-Time Streaming Protocol) controls the delivery of streaming media. By default, the
port number is set to 554.
–
The RTP (Real-time Transport Protocol) is used to deliver video and audio data to the clients.
By default, the RTP port for video is set to 5556.
–
The RTCP (Real-time Transport Control Protocol) allows the camera to transmit the data by
monitoring the Internet traffic volume. By default, the RTCP port for video is set to 5557.
The ports can be changed to values between 1025 and 65535. The RTP port must be an even number
and the RTCP port is the RTP port number plus one, and thus is always an odd number. When the
RTP port changes, the RTCP port will change accordingly. If the RTP ports are incorrectly assigned,
the following warning message will be displayed.
Invalid port number. RTP video port must be an even number.
•
Multicast settings for streams—Click the items to display the detailed configuration information.
Select the Always multicast option to enable multicast for video streams.
Unicast video transmission delivers a stream through point-to-point transmission; multicast, on the
other hand, sends a stream to the multicast group address and allows multiple clients to acquire the
stream at the same time by requesting a copy from the multicast group address. Therefore, enabling
multicast can effectively save Internet bandwith.