CN112449252B - Method and device for maintaining video streaming system, wireless network bridge equipment and storage medium - Google Patents
Method and device for maintaining video streaming system, wireless network bridge equipment and storage medium Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client
- H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
- H04N21/647—Control signaling between network components and server or clients; Network processes for video distribution between server and clients, e.g. controlling the quality of the video stream, by dropping packets, protecting content from unauthorised alteration within the network, monitoring of network load, bridging between two different networks, e.g. between IP and wireless
- H04N21/64723—Monitoring of network processes or resources, e.g. monitoring of network load
- H04N21/64738—Monitoring network characteristics, e.g. bandwidth, congestion level
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/08—Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L43/00—Arrangements for monitoring or testing data switching networks
- H04L43/16—Threshold monitoring
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N17/00—Diagnosis, testing or measuring for television systems or their details
- H04N17/004—Diagnosis, testing or measuring for television systems or their details for digital television systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/234—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs
- H04N21/23418—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs involving operations for analysing video streams, e.g. detecting features or characteristics
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/238—Interfacing the downstream path of the transmission network, e.g. adapting the transmission rate of a video stream to network bandwidth; Processing of multiplex streams
- H04N21/2385—Channel allocation; Bandwidth allocation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/25—Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
- H04N21/266—Channel or content management, e.g. generation and management of keys and entitlement messages in a conditional access system, merging a VOD unicast channel into a multicast channel
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/438—Interfacing the downstream path of the transmission network originating from a server, e.g. retrieving MPEG packets from an IP network
- H04N21/4383—Accessing a communication channel
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs
- H04N21/44008—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs involving operations for analysing video streams, e.g. detecting features or characteristics in the video stream
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
Abstract
The embodiment of the invention provides a method and a device for maintaining a video streaming transmission system, wireless bridge equipment and a storage medium, wherein the first wireless bridge equipment working in an access point mode in the video streaming transmission system detects whether the video streaming transmission quality of the video streaming transmission system meets a preset requirement; if not, detecting whether a current working channel for video stream transmission between the first wireless bridge equipment and the second wireless bridge equipment is interfered; if so, selecting one channel from preset alternative channels as a target channel; and switching the current working channel to the target channel. The first wireless bridge equipment automatically detects the video stream transmission quality of the video stream transmission system, when the video stream transmission quality does not meet the preset requirement, whether the current working channel is interfered or not is automatically detected, and if the current working channel is interfered, the working channel can be determined again from the alternative channels, so that the maintenance efficiency of the video stream transmission system is improved.
Description
Technical Field
The present invention relates to the field of wireless network bridge technology, and in particular, to a method and apparatus for maintaining a video streaming system, a wireless network bridge device, and a storage medium.
Background
The wireless bridge is a wireless transmission mode and can be generally used for monitoring video streaming transmission in areas such as construction sites, elevators and the like. As shown in fig. 1, a wireless bridge based video streaming system generally comprises: the Network Video Recorder comprises a Network Camera (IP Camera, IPC) for collecting Video streams, a first wireless bridge device working in an access point mode, a second wireless bridge device working in a client mode, a switch and a Network Video Recorder (NVR) for previewing the Video streams, wherein the IPC and the second wireless bridge device are in wired Video stream transmission, and the first wireless bridge device and the switch as well as the switch and the NVR are in wired Video stream transmission.
At present, for the above-mentioned video streaming transmission system, only when the maintainer finds that the video playing is stuck in the NVR, the maintainer will manually perform problem troubleshooting and locate the cause of the problem, wherein the most common cause is: the working channel for video stream transmission between the first wireless bridge device and the second wireless bridge device is interfered by external wireless signals, and at the moment, the configuration information needs to be read and modified in the first bridge device manually through a testing tool, and the working channel is switched.
The maintenance process depends on manual participation, the maintenance process is complex, and the maintenance efficiency is low.
Disclosure of Invention
An object of the embodiments of the present invention is to provide a method and an apparatus for maintaining a video streaming system, a wireless bridge device, and a storage medium, so as to improve the maintenance efficiency of the video streaming system. The specific technical scheme is as follows:
in a first aspect, an embodiment of the present invention provides a method for maintaining a video streaming system, where the method is applied to a first wireless bridge device operating in an access point mode in the video streaming system, and the video streaming system further includes: a second wireless bridge device communicatively coupled to the first wireless bridge device via a wireless bridge and operating in a client mode, the method comprising:
detecting whether the video streaming transmission quality of the video streaming transmission system meets a preset requirement;
if not, detecting whether a current working channel for video stream transmission between the first wireless bridge equipment and the second wireless bridge equipment is interfered;
if so, selecting one channel from preset alternative channels as a target channel;
and switching the current working channel to the target channel.
Further, the step of detecting whether the video streaming quality of the video streaming system meets a preset requirement includes:
acquiring video stream data sent by the second wireless network bridge equipment in real time;
analyzing the video stream data to obtain analyzed video stream data;
calculating the current code rate and the current delay time of the video stream data according to the analyzed video stream data;
acquiring a preset delay threshold corresponding to the current code rate;
and determining whether the video streaming transmission quality of the video streaming transmission system meets a preset requirement according to whether the current delay time is smaller than the delay threshold.
Further, the step of calculating the current bit rate and the current delay time of the video stream data according to the parsed video stream data includes:
calculating the current code rate of the video stream data according to the load length information of the video data packet contained in the analyzed video stream data;
and calculating the current delay time of the video stream data according to the receiving time stamp of the video data packet contained in the analyzed video stream data.
Further, the step of detecting whether the current working channel for video stream transmission between the first wireless bridge device and the second wireless bridge device is interfered includes:
acquiring the signal intensity and the video stream wireless data frame sending rate of the second wireless network bridge equipment;
calculating the channel utilization rate of the current working channel for video stream transmission between the first wireless bridge device and the second wireless bridge device based on the video stream wireless data frame sending rate;
detecting whether the channel utilization rate exceeds a preset utilization rate threshold value;
if yes, detecting whether the signal intensity exceeds a preset signal intensity threshold value or not, and whether the sending rate of the video stream wireless data frame is smaller than a preset sending rate threshold value or not; and if the signal intensity exceeds a preset signal intensity threshold value and the video stream wireless data frame sending rate is smaller than a preset sending rate threshold value, determining that the current working channel for video stream transmission between the first wireless bridge device and the second wireless bridge device is interfered.
Further, the step of selecting one channel from preset candidate channels as a target channel includes:
respectively determining the number of wireless signals existing in each preset alternative channel at the current moment and/or the channel utilization rate of each preset alternative channel;
and determining a target channel from the alternative channels according to the number of wireless signals existing in each preset alternative channel at the current moment and/or the channel utilization rate of each preset alternative channel.
In a second aspect, an embodiment of the present invention provides a method for detecting video streaming quality, where the method includes:
acquiring video stream data to be detected in real time;
analyzing the video stream data to obtain analyzed video stream data;
calculating the current code rate and the current delay time of the video stream according to the analyzed video stream data;
acquiring a preset delay threshold corresponding to the current code rate;
and determining whether the transmission quality of the video stream data to be detected meets a preset requirement or not according to whether the current delay time is smaller than the delay threshold or not.
In a third aspect, an embodiment of the present invention provides a maintenance apparatus for a video streaming system, which is applied to a first wireless bridge device operating in an access point mode in the video streaming system, where the video streaming system further includes: a second wireless bridge device communicatively coupled to the first wireless bridge device via a wireless bridge and operating in a client mode, the apparatus comprising:
the transmission quality detection module is used for detecting whether the video streaming transmission quality of the video streaming transmission system meets a preset requirement or not;
an interference detection module, configured to detect whether a current working channel for video stream transmission between the first wireless bridge device and the second wireless bridge device is interfered, if the video stream transmission quality of the video stream transmission system does not meet a preset requirement;
a target channel selection module, configured to select a channel from preset candidate channels as a target channel if a current working channel for video streaming transmission between the first wireless bridge device and the second wireless bridge device is interfered;
and the channel switching module is used for switching the current working channel into the target channel.
Further, the transmission quality detection module includes: a video stream data acquisition sub-module, a video stream data analysis sub-module, a code rate and delay time calculation sub-module, a delay threshold acquisition sub-module and a transmission quality determination sub-module;
the video stream data acquisition submodule is used for acquiring video stream data sent by the second wireless bridge device in real time;
the video stream data analysis submodule is used for analyzing the video stream data to obtain analyzed video stream data;
the code rate and delay time calculation submodule is used for calculating the current code rate and the current delay time of the video stream data according to the analyzed video stream data;
the delay threshold acquisition submodule is used for acquiring a preset delay threshold corresponding to the current code rate;
and the transmission quality determining submodule is used for determining whether the video streaming transmission quality of the video streaming transmission system meets a preset requirement according to whether the current delay time is smaller than the delay threshold.
Further, the code rate and delay time calculation submodule is specifically configured to calculate a current code rate of the video stream data according to load length information of a video data packet included in the parsed video stream data; and calculating the current delay time of the video stream data according to the receiving time stamp of the video data packet contained in the analyzed video stream data.
Further, the interference detection module includes: a signal strength and sending rate obtaining sub-module, a channel utilization rate calculating sub-module, a channel utilization rate detecting sub-module and an interference determining sub-module;
the signal intensity and sending rate obtaining submodule is used for obtaining the signal intensity of the second wireless network bridge equipment and the sending rate of the video stream wireless data frame;
the channel utilization rate calculation sub-module is configured to calculate a channel utilization rate of a current working channel for video streaming transmission between the first wireless bridge device and the second wireless bridge device based on the video streaming wireless data frame sending rate;
the channel utilization rate detection submodule is used for detecting whether the channel utilization rate exceeds a preset utilization rate threshold value or not;
the interference determination submodule is configured to detect whether the signal strength exceeds a preset signal strength threshold and whether the sending rate of the video streaming wireless data frame is less than a preset sending rate threshold if the channel utilization exceeds a preset utilization threshold; and if the signal intensity exceeds a preset signal intensity threshold value and the video stream wireless data frame sending rate is smaller than a preset sending rate threshold value, determining that the current working channel for video stream transmission between the first wireless bridge device and the second wireless bridge device is interfered.
Further, the target channel selecting module is specifically configured to: respectively determining the number of wireless signals existing in each preset alternative channel at the current moment and/or the channel utilization rate of each preset alternative channel; and determining a target channel from the alternative channels according to the number of wireless signals existing in each preset alternative channel at the current moment and/or the channel utilization rate of each preset alternative channel.
In a fourth aspect, an embodiment of the present invention provides an apparatus for detecting video streaming quality, where the apparatus includes: the video stream data acquisition module is used for acquiring video stream data to be detected in real time;
the video stream data analysis module is used for analyzing the video stream data to obtain analyzed video stream data;
a code rate and delay time calculation module, configured to calculate a current code rate and a current delay time of the video stream according to the parsed video stream data;
the delay threshold acquisition module is used for acquiring a preset delay threshold corresponding to the current code rate;
and the transmission quality determining module is used for determining whether the transmission quality of the video stream data to be detected meets a preset requirement according to whether the current delay time is smaller than the delay threshold.
In a fifth aspect, embodiments of the present invention provide a wireless bridge device comprising a processor and a memory, wherein,
the memory is used for storing a computer program;
the processor is configured to implement the maintenance method of any of the video streaming systems when executing the program stored in the memory.
In a sixth aspect, an embodiment of the present invention provides an electronic device, including a processor and a memory, wherein,
the memory is used for storing a computer program;
the processor is used for realizing the video stream transmission quality detection method when executing the program stored in the memory.
In a seventh aspect, an embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored in the computer-readable storage medium, and when the computer program runs on a computer, the computer is caused to execute any one of the above-mentioned maintenance methods for a video streaming system.
In an eighth aspect, the embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored, and when the computer program runs on a computer, the computer is caused to execute the video streaming quality detection method.
According to the maintenance method and device of the video streaming transmission system, the wireless bridge device and the storage medium provided by the embodiment of the invention, the first wireless bridge device working in the access point mode detects whether the video streaming transmission quality of the video streaming transmission system meets the preset requirement; if not, detecting whether a current working channel for video stream transmission between the first wireless bridge equipment and the second wireless bridge equipment is interfered; if so, selecting one channel from preset alternative channels as a target channel; and switching the current working channel to the target channel. In the embodiment of the invention, the first wireless bridge equipment automatically detects the video stream transmission quality of the video stream transmission system, when the video stream transmission quality does not meet the preset requirement, whether the current working channel is interfered is automatically detected, and if the current working channel is interfered, the working channel can be determined again from the alternative channels.
Of course, it is not necessary for any product or method to achieve all of the above-described advantages at the same time for practicing the invention.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of a video streaming system based on a wireless bridge;
fig. 2 is a schematic flowchart of a maintenance method of a video streaming system according to an embodiment of the present invention;
fig. 3 is another schematic flow chart of a maintenance method of a video streaming system according to an embodiment of the present invention;
fig. 4 is a schematic flow chart of a video stream transmission quality detection method according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a maintenance apparatus of a video streaming system according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a video streaming quality detection apparatus according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a wireless bridge device according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
In order to improve the maintenance efficiency of a video streaming system, embodiments of the present invention provide a maintenance method and apparatus for a video streaming system, a wireless bridge device, and a storage medium.
Referring to fig. 2, fig. 2 is a flowchart illustrating a maintenance method of a video streaming system according to an embodiment of the present invention, where the method is applied to a first wireless bridge device operating in an access point mode in the video streaming system, and the method specifically includes the following steps:
Whether the video streaming transmission quality meets the preset requirement can be determined by detecting the packet loss rate or the delay time of the video streaming transmission system in the data transmission process in real time, and specifically, when the packet loss rate is greater than a packet loss rate threshold value or the delay time is greater than a preset delay time, it can be determined that the video streaming transmission quality of the video streaming transmission system does not meet the preset requirement.
Specifically, step 203 may be executed to reselect the working channel when it is detected that the current working channel is interfered, or step 203 may be executed to reselect the working channel when it is detected that the interference suffered by the current working channel reaches a certain degree.
And step 204, switching the current working channel into a target channel.
As can be seen from the foregoing embodiments, in the embodiments of the present invention, the first wireless bridge device automatically detects the video streaming quality of the video streaming system, and when the video streaming quality does not meet the preset requirement, automatically detects whether the current working channel is interfered, and if the current working channel is interfered, the working channel may be re-determined from the alternative channels.
Referring to fig. 3, fig. 3 is another schematic flow chart of a maintenance method of a video streaming system according to an embodiment of the present invention, which includes the specific steps of:
The data stream may be transmitted between the second wireless bridge device and the first wireless bridge device via a plurality of transmission protocols, such as: the data stream data may be transmitted through a combined protocol composed of an RTSP protocol, an RTP protocol and a TCP protocol, and when the data stream data is transmitted through the combined protocol, a specific process of the first wireless bridge device parsing the video stream data may be:
converting a received data frame under an 802.11 standard into an ethernet data frame under an 802.3 standard, judging whether the type of the ethernet data frame is an IP message, if so, further judging whether the type of the IP message is a TCP packet, if so, judging whether a TCP port number of the TCP packet is an RTSP protocol port number, if so, further judging whether a load type of an RTP packet included in the RTSP packet is video data, if so, determining that the data frame is a video data frame, and at the moment, generating a receiving timestamp of each video data frame according to the receiving time of each video data frame, and simultaneously generating video stream information of the video stream, wherein the video stream information may include: the contents of the video stream, such as source IP information, destination IP information, source port information, destination port information, sequence number of RTP packet, payload length, and receiving timestamp, of each video data frame.
Specifically, the ratio of the total length of the received video stream data payload to the time period within a time period, such as 5s, may be determined as the current bitrate of the video stream data. For example: if the total length of the video stream data payload received within 5s is 10Mbit, the code rate is: 2Mbit/s.
And the receiving time stamp is the receiving time of each video data packet recorded in the video stream receiving process of the first wireless bridge device.
Specifically, for example, the difference between the received acceptance timestamps of 2 consecutive video data packets may be determined as the current delay time of the video stream data.
In order to improve the accuracy of detecting the video stream transmission quality, in the embodiment of the present invention, a corresponding delay threshold may be set in advance for each code rate, for example, a corresponding table of code rates and delay thresholds may be established in advance, where an example is as follows:
watch 1
| Code rate (unit: mbps) | Delay threshold (unit: ms) |
| 2 | 30 |
| 4 | 20 |
If the current delay time is less than the corresponding delay threshold, the video stream transmission quality of the video stream transmission system meets the preset requirement, namely the video stream is not blocked, and under the condition, the current working channel does not need to be switched. Returning to step 301, the video stream data sent by the second wireless bridge device is continuously acquired. If the current delay time is not less than the corresponding delay threshold, the video stream transmission quality of the video stream transmission system does not meet the preset requirement, that is, it indicates that the video stream may be jammed, in this case, step 307 needs to be executed to obtain the signal strength of the second bridge device and the video stream wireless data frame sending rate, and further determine the channel utilization rate, and determine whether the current working channel for video stream transmission between the first wireless bridge device and the second wireless bridge device is interfered by judging the content such as the channel utilization rate.
Specifically, the first bridge obtains the signal strength of the second bridge and the sending rate of the video stream data frame by receiving the video stream wireless data frame sent by the second bridge.
The channel utilization ratio means: the sending party effectively sends the data in the time interval of one sending period, and the time required by the sending party occupies the ratio of the whole sending period. Specifically, the channel utilization can be calculated by the following formula:
wherein, T is a transmission period, i.e. a time interval from when the second wireless bridge device starts to transmit video data to when the first bridge device receives the first video data frame; c is the video stream wireless data frame sending rate; l is the amount of data transmitted by the second wireless bridge device during a transmission period; and N is the channel utilization rate.
In this step, when the signal strength exceeds the preset signal strength threshold and the sending rate of the video stream wireless data frame is less than the preset sending rate threshold, it is determined that the current working channel for video stream transmission between the first wireless bridge device and the second wireless bridge device is interfered, and in addition, if the signal strength does not exceed the preset signal strength threshold or the signal strength does not exceed the preset signal strength threshold but the sending rate of the video stream wireless data frame is not less than the preset sending rate threshold, it is determined that the current working channel for video stream transmission between the first wireless bridge device and the second wireless bridge device is not interfered. If the video stream data is not interfered, the method returns to step 301 to continue to acquire the video stream data sent by the second wireless bridge device.
Specifically, the following may be mentioned: and if the signal strength exceeds a preset signal strength threshold value of-10 db and the sending rate of the video stream wireless data frame is less than a preset sending rate threshold value of 24Mbps, determining that the current working channel for video stream transmission between the first wireless bridge device and the second wireless bridge device is interfered.
Specifically, the first wireless bridge device may traverse each candidate channel, and stay in each candidate channel for a preset time, for example, 10ms, during which, the first wireless bridge device may monitor a beacon frame sent by a wireless signal existing in each candidate channel, and obtain, through analysis of the beacon frame, wireless signal identification information for sending the beacon frame, so as to obtain the number of wireless signals existing in each candidate channel, or determine the number of wireless signals by actively sending a Probe Request frame, that is: and actively sending the Probe Request frame, and when receiving the Probe Response frame corresponding to the Probe Request frame, analyzing the Probe Response frame to acquire the wireless signal identification information for sending the Probe Response frame, so as to obtain the number of the wireless signals in each alternative channel.
Further, when the transmission distance is long, the interference in the vicinity of the first wireless bridge device may be different from the interference in the vicinity of the first wireless bridge device for the same alternative channel, that is: at the same time, for the same candidate channel, the number of wireless signals determined at the first wireless bridge device may be different from the number of wireless signals determined at the second wireless bridge device, and therefore, the first wireless bridge device may also receive the number of wireless signals existing in each preset candidate channel at the current time, which is sent by the second bridge device, while determining the number of wireless signals existing in each preset candidate channel at the current time, where a method for determining the number of wireless signals existing in each preset candidate channel at the current time by the second bridge device may be the same as a method for determining the number of wireless signals by the first bridge device, and is not described herein again.
Specifically, the step may determine the target channel from the candidate channels in the following three ways:
the first mode is as follows: the target channel can be determined only according to the number of the wireless signals in each preset alternative channel, and the alternative channel with the least number of the wireless signals is determined as the target channel;
further, for the same candidate channel, the wireless information amount with a larger value of the wireless information amount determined by the first bridge device and the wireless information amount determined by the second bridge device may be determined as the wireless signal amount existing in the candidate channel.
The second mode is as follows: or determining the alternative channel with the lowest channel utilization rate as the target channel according to the channel utilization rate of each preset alternative channel;
the third mode is as follows: the method can also be as follows: and determining a target channel according to the number of wireless signals existing in each preset alternative channel and the channel utilization rate of each preset alternative channel.
For example, a preset number of candidate channels with the number of existing wireless signals smaller than a certain number threshold may be selected from all the candidate channels to serve as transition channels, and then a channel with the minimum channel utilization rate may be selected from the transition channels to serve as a target channel.
Similarly, a part of channels may be selected as transition channels from candidate channels whose channel utilization ratio is smaller than a certain utilization ratio threshold, and then a channel with the least number of existing wireless signals may be selected as a target channel from the transition channels. Here, the specific strategy for determining the target channel is not limited.
And 313, switching the current working channel to a target channel.
In the embodiment shown in fig. 3, firstly, the video stream data can be obtained in real time, and then whether the video stream transmission quality of the video stream transmission system meets the preset requirement can be determined in real time according to the obtained video stream data, so that system maintenance is not performed only when a maintainer finds that video playing is jammed in NVR, but system maintenance can be started when the video stream transmission quality is judged to not meet the preset requirement in real time, and thus, the timeliness of video stream transmission system maintenance is improved. Secondly, when the video stream transmission quality is detected, the detection is carried out according to whether the current delay time of the video stream data is smaller than a preset delay threshold corresponding to the current code rate of the video stream data, so that the accuracy of the video stream transmission quality detection is improved. And thirdly, the first wireless bridge device automatically detects the video stream transmission quality of the video stream transmission system, when the video stream transmission quality does not meet the preset requirement, whether the current working channel is interfered or not is automatically detected, and if the current working channel is interfered, the working channel can be determined again from the alternative channels.
Referring to fig. 4, fig. 4 is a schematic flow chart of a video stream transmission quality detection method according to an embodiment of the present invention, which includes the specific steps of:
In the embodiment shown in fig. 4, the video stream data to be detected can be obtained in real time, and whether the video stream transmission quality meets the preset requirement can be further determined according to the obtained video stream data to be detected in real time, so that the timeliness of the video stream transmission quality detection is improved. And secondly, the video stream transmission quality is detected according to whether the current delay time of the video stream data is less than a preset delay threshold corresponding to the current code rate of the video stream data, so that the accuracy of the video stream transmission quality detection is improved.
Based on the same inventive concept, according to the maintenance method of the video streaming system provided in the foregoing embodiment of the present invention, correspondingly, an embodiment of the present invention further provides a maintenance apparatus of the video streaming system, which is applied to a first wireless network bridge device operating in an access point mode in the video streaming system, and the video streaming system further includes: a second wireless bridge device communicatively coupled to the first wireless bridge device via a wireless bridge and operating in a client mode; the schematic structural diagram of the device is shown in fig. 5, and the device comprises:
a transmission quality detection module 501, configured to detect whether the video streaming quality of the video streaming system meets a preset requirement;
an interference detection module 502, configured to detect whether a current working channel for video stream transmission between a first wireless bridge device and a second wireless bridge device is interfered, if the video stream transmission quality of the video stream transmission system does not meet a preset requirement;
a target channel selection module 503, configured to select a channel from preset candidate channels as a target channel if a current working channel for video stream transmission between the first wireless bridge device and the second wireless bridge device is interfered;
a channel switching module 504, configured to switch the current working channel to a target channel.
Further, the transmission quality detection module 501 includes: a video stream data acquisition sub-module, a video stream data analysis sub-module, a code rate and delay time calculation sub-module, a delay threshold acquisition sub-module and a transmission quality determination sub-module;
the video stream data acquisition submodule is used for acquiring video stream data sent by the second wireless network bridge equipment in real time;
the video stream data analysis submodule is used for analyzing the video stream data to obtain the analyzed video stream data;
the code rate and delay time calculation submodule is used for calculating the current code rate and the current delay time of the video stream data according to the analyzed video stream data;
the delay threshold acquisition submodule is used for acquiring a preset delay threshold corresponding to the current code rate;
and the transmission quality determining submodule is used for determining whether the video streaming transmission quality of the video streaming transmission system meets the preset requirement according to whether the current delay time is smaller than the delay threshold.
Further, the code rate and delay time calculation submodule is specifically configured to calculate a current code rate of the video stream data according to load length information of a video data packet included in the parsed video stream data; and calculating the current delay time of the video stream data according to the receiving time stamp of the video data packet contained in the analyzed video stream data.
Further, the interference detection module 502 includes: a signal intensity and sending rate obtaining sub-module, a channel utilization rate calculating sub-module, a channel utilization rate detecting sub-module and an interference determining sub-module;
the signal intensity and sending rate obtaining submodule is used for obtaining the signal intensity of the second wireless network bridge equipment and the sending rate of the video stream wireless data frame;
the channel utilization rate calculation sub-module is used for calculating the channel utilization rate of a current working channel for video streaming transmission between the first wireless bridge device and the second wireless bridge device based on the sending rate of the video streaming wireless data frame;
the channel utilization rate detection submodule is used for detecting whether the channel utilization rate exceeds a preset utilization rate threshold value or not;
the interference determination submodule is used for detecting whether the signal intensity exceeds a preset signal intensity threshold value and whether the sending rate of the video stream wireless data frame is less than a preset sending rate threshold value or not if the channel utilization rate exceeds a preset utilization rate threshold value; and if the signal intensity exceeds a preset signal intensity threshold value and the sending rate of the video stream wireless data frames is less than a preset sending rate threshold value, determining that the current working channel for video stream transmission between the first wireless bridge device and the second wireless bridge device is interfered.
Further, the target channel selecting module 504 is specifically configured to: respectively determining the number of wireless signals existing in each preset alternative channel at the current moment and/or the channel utilization rate of each preset alternative channel; and determining a target channel from the alternative channels according to the number of wireless signals existing in each preset alternative channel at the current moment and/or the channel utilization rate of each preset alternative channel.
In the embodiment shown in fig. 5 of the present invention, the transmission quality detection module 501 of the first wireless bridge device automatically detects the video streaming quality of the video streaming system, when the video streaming quality does not meet the preset requirement, the interference detection module 502 automatically detects whether the current working channel is interfered, and if the current working channel is interfered, the target channel selection module 503 may re-determine the working channel from the alternative channels, and the channel switching module 504 switches the current working channel to the target channel. The above process does not need to manually participate in complex test work, thereby improving the maintenance efficiency of the video stream transmission system.
Based on the same inventive concept, according to the video streaming quality detection method provided by the above embodiment of the present invention, correspondingly, an embodiment of the present invention further provides a video streaming quality detection apparatus, a schematic structural diagram of the apparatus is shown in fig. 6, and the apparatus includes:
a video stream data obtaining module 601, configured to obtain video stream data to be detected in real time;
a video stream data analyzing module 602, configured to analyze video stream data to obtain analyzed video stream data;
a code rate and delay time calculation module 603, configured to calculate a current code rate and a current delay time of the video stream according to the parsed video stream data;
a delay threshold obtaining module 604, configured to obtain a preset delay threshold corresponding to the current code rate;
a transmission quality determining module 605, configured to determine whether the transmission quality of the video stream data to be detected meets a preset requirement according to whether the current delay time is smaller than the delay threshold.
In the embodiment shown in fig. 6 of the present invention, since the video stream data to be detected can be obtained in real time, and whether the video stream transmission quality meets the preset requirement can be determined according to the obtained video stream data to be detected in real time, the timeliness of the video stream transmission quality detection is improved. And secondly, the video stream transmission quality is detected according to whether the current delay time of the video stream data is less than a preset delay threshold corresponding to the current code rate of the video stream data, so that the accuracy of the video stream transmission quality detection is improved.
An embodiment of the present invention further provides a wireless bridge device, as shown in fig. 7, including a processor 701, a communication interface 702, a memory 703 and a communication bus 704, where the processor 701, the communication interface 702, and the memory 703 complete mutual communication through the communication bus 704,
a memory 703 for storing a computer program;
the processor 701 is configured to implement the following steps when executing the program stored in the memory 703:
detecting whether the video streaming transmission quality of a video streaming transmission system meets a preset requirement or not;
if not, detecting whether a current working channel for video stream transmission between the first wireless bridge equipment and the second wireless bridge equipment is interfered;
if so, selecting one channel from preset alternative channels as a target channel;
and switching the current working channel to the target channel.
Further, other processing flows in the maintenance method of the video streaming system provided by the embodiment of the present invention may also be included, and are not described in detail herein.
An embodiment of the present invention further provides an electronic device, as shown in fig. 8, which includes a processor 801, a communication interface 802, a memory 803, and a communication bus 804, where the processor 801, the communication interface 802, and the memory 803 complete mutual communication through the communication bus 804,
a memory 803 for storing a computer program;
the processor 801 is configured to implement the following steps when executing the program stored in the memory 803:
acquiring video stream data to be detected in real time;
analyzing the video stream data to obtain analyzed video stream data;
calculating the current code rate and the current delay time of the video stream according to the analyzed video stream data;
acquiring a preset delay threshold corresponding to the current code rate;
and determining whether the transmission quality of the video stream data to be detected meets the preset requirement or not according to whether the current delay time is smaller than a delay threshold or not.
The communication bus mentioned above by the wireless bridge device or the electronic device may be a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. The communication bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown, but this is not intended to represent only one bus or type of bus.
The communication interface is used for communication between the above-mentioned wireless bridge device or electronic device and other devices.
The Memory may include a Random Access Memory (RAM), and may also include a non-volatile Memory (non-volatile Memory), such as at least one disk Memory. Optionally, the memory may also be at least one memory device located remotely from the processor.
The Processor may be a general-purpose Processor, and includes a Central Processing Unit (CPU), a Network Processor (NP), and the like; the Integrated Circuit may also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, a discrete Gate or transistor logic device, or a discrete hardware component.
In still another embodiment provided by the present invention, there is also provided a computer-readable storage medium having stored therein a computer program which, when run on a computer, causes the computer to execute the maintenance method of the video streaming system in any of the above-described embodiments.
In still another embodiment provided by the present invention, another computer-readable storage medium is also provided, in which a computer program is stored, which, when run on a computer, causes the computer to execute the video streaming quality detection method in the above-described embodiment.
In a further embodiment provided by the present invention, there is also provided a computer program product containing instructions which, when run on a computer, cause the computer to perform the method of maintaining a video streaming system according to any of the above embodiments.
In yet another embodiment provided by the present invention, another computer program product containing instructions is also provided, which when run on a computer, causes the computer to execute the video streaming quality detection method in the above-mentioned embodiment.
In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the invention to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website site, computer, server, or data center to another website site, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., floppy Disk, hard Disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., solid State Disk (SSD)), among others.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of another identical element in a process, method, article, or apparatus that comprises the element.
All the embodiments in the present specification are described in a related manner, and the same and similar parts among the embodiments may be referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the apparatus, device and storage medium embodiments, since they are substantially similar to the method embodiments, the description is relatively simple, and reference may be made to some descriptions of the method embodiments for relevant points.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.
Claims (9)
1. A method for maintaining a video streaming system, the method being applied to a first wireless bridge device operating in an access point mode in the video streaming system, the video streaming system further comprising: a second wireless bridge device communicatively coupled to the first wireless bridge device via a wireless bridge and operating in a client mode, the method comprising:
detecting whether the video streaming transmission quality of the video streaming transmission system meets a preset requirement;
if not, detecting whether a current working channel for video stream transmission between the first wireless bridge equipment and the second wireless bridge equipment is interfered;
if so, selecting one channel from preset alternative channels as a target channel;
switching the current working channel to the target channel;
the step of detecting whether the current working channel for video streaming transmission between the first wireless bridge device and the second wireless bridge device is interfered comprises:
acquiring the signal intensity and the video stream wireless data frame sending rate of the second wireless network bridge equipment;
calculating the channel utilization rate of the current working channel for video stream transmission between the first wireless bridge device and the second wireless bridge device based on the video stream wireless data frame sending rate;
detecting whether the channel utilization rate exceeds a preset utilization rate threshold value;
if yes, detecting whether the signal strength exceeds a preset signal strength threshold value or not, and whether the sending rate of the video streaming wireless data frame is smaller than a preset sending rate threshold value or not; and if the signal intensity exceeds a preset signal intensity threshold value and the sending rate of the video stream wireless data frame is less than a preset sending rate threshold value, determining that the current working channel for video stream transmission between the first wireless bridge device and the second wireless bridge device is interfered.
2. The method according to claim 1, wherein the step of detecting whether the video streaming quality of the video streaming system meets a preset requirement comprises:
acquiring video stream data sent by the second wireless bridge equipment in real time;
analyzing the video stream data to obtain analyzed video stream data;
calculating the current code rate and the current delay time of the video stream data according to the analyzed video stream data;
acquiring a preset delay threshold corresponding to the current code rate;
and determining whether the video streaming transmission quality of the video streaming transmission system meets a preset requirement according to whether the current delay time is smaller than the delay threshold.
3. The method according to claim 2, wherein the step of calculating the current bitrate and the current delay time of the video stream data according to the parsed video stream data comprises:
calculating the current code rate of the video stream data according to the load length information of the video data packet contained in the analyzed video stream data;
and calculating the current delay time of the video stream data according to the receiving time stamp of the video data packet contained in the analyzed video stream data.
4. The method according to claim 1, wherein the step of selecting one channel from the preset candidate channels as the target channel comprises:
respectively determining the number of wireless signals existing in each preset alternative channel at the current moment and/or the channel utilization rate of each preset alternative channel;
and determining a target channel from the alternative channels according to the number of wireless signals existing in each preset alternative channel at the current moment and/or the channel utilization rate of each preset alternative channel.
5. A maintenance apparatus for a video streaming system, which is applied to a first wireless bridge device operating in an access point mode in the video streaming system, the video streaming system further comprising: a second wireless bridge device communicatively coupled to the first wireless bridge device via a wireless bridge and operating in a client mode, the apparatus comprising:
the transmission quality detection module is used for detecting whether the video streaming transmission quality of the video streaming transmission system meets a preset requirement or not;
an interference detection module, configured to detect whether a current working channel for video stream transmission between the first wireless bridge device and the second wireless bridge device is interfered, if the video stream transmission quality of the video stream transmission system does not meet a preset requirement;
a target channel selection module, configured to select a channel from preset candidate channels as a target channel if a current working channel for video stream transmission between the first wireless bridge device and the second wireless bridge device is interfered;
a channel switching module, configured to switch the current working channel to the target channel;
the interference detection module includes: a signal strength and sending rate obtaining sub-module, a channel utilization rate calculating sub-module, a channel utilization rate detecting sub-module and an interference determining sub-module;
the signal strength and sending rate obtaining submodule is used for obtaining the signal strength of the second wireless network bridge equipment and the sending rate of the video streaming wireless data frame;
the channel utilization rate calculating sub-module is used for calculating the channel utilization rate of the current working channel for video stream transmission between the first wireless bridge device and the second wireless bridge device based on the video stream wireless data frame sending rate;
the channel utilization rate detection submodule is used for detecting whether the channel utilization rate exceeds a preset utilization rate threshold value or not;
the interference determination submodule is configured to detect whether the signal strength exceeds a preset signal strength threshold and whether the video stream wireless data frame sending rate is less than a preset sending rate threshold if the channel utilization exceeds a preset utilization threshold; and if the signal intensity exceeds a preset signal intensity threshold value and the video stream wireless data frame sending rate is smaller than a preset sending rate threshold value, determining that the current working channel for video stream transmission between the first wireless bridge device and the second wireless bridge device is interfered.
6. The apparatus of claim 5, wherein the transmission quality detection module comprises: a video stream data acquisition sub-module, a video stream data analysis sub-module, a code rate and delay time calculation sub-module, a delay threshold acquisition sub-module and a transmission quality determination sub-module;
the video stream data acquisition submodule is used for acquiring video stream data sent by the second wireless bridge device in real time;
the video stream data analysis submodule is used for analyzing the video stream data to obtain analyzed video stream data;
the code rate and delay time calculation submodule is used for calculating the current code rate and the current delay time of the video stream data according to the analyzed video stream data;
the delay threshold acquisition submodule is used for acquiring a preset delay threshold corresponding to the current code rate;
and the transmission quality determining submodule is used for determining whether the video streaming transmission quality of the video streaming transmission system meets a preset requirement according to whether the current delay time is smaller than the delay threshold.
7. The apparatus of claim 5, wherein the target channel selection module is specifically configured to: respectively determining the number of wireless signals existing in each preset alternative channel at the current moment and/or the channel utilization rate of each preset alternative channel; and determining a target channel from the alternative channels according to the number of wireless signals existing in each preset alternative channel at the current moment and/or the channel utilization rate of each preset alternative channel.
8. A wireless bridge device comprising a processor and a memory, wherein,
the memory is used for storing a computer program;
the processor, when executing the program stored in the memory, implementing the method steps of any of claims 1-4.
9. A computer-readable storage medium, characterized in that a computer program is stored in the computer-readable storage medium, which computer program, when being executed by a processor, carries out the method steps of any one of claims 1 to 4.
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| CN113542150B (en) * | 2021-07-14 | 2023-06-02 | 杭州海康威视数字技术股份有限公司 | Data transmission method and device and central end network bridge |
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