CN109640040B - Video transmission method, device, system and server - Google Patents
Video transmission method, device, system and server Download PDFInfo
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- CN109640040B CN109640040B CN201811512217.5A CN201811512217A CN109640040B CN 109640040 B CN109640040 B CN 109640040B CN 201811512217 A CN201811512217 A CN 201811512217A CN 109640040 B CN109640040 B CN 109640040B
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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
- H04N7/181—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast for receiving images from a plurality of remote sources
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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
- H04N21/65—Transmission of management data between client and server
- H04N21/658—Transmission by the client directed to the server
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Abstract
The invention provides a video transmission method, a device, a system and a server, which can directly transmit audio and video data streams after screen fusion to a dispatching desk without passing through a core network, thereby reducing the processing pressure of the core network. Or transmitting the audio and video data stream after screen fusion to a core network so that the core network transmits the audio and video data stream after screen fusion to a dispatching desk, wherein the core network transmits the audio and video data after screen fusion, the audio and video data after screen fusion is a path of audio and video data stream converted from multiple paths of audio and video data streams, and resources required for receiving the path of audio and video data stream are smaller than those required for receiving the multiple paths of audio and video data streams, so that the processing pressure of the core network can be reduced.
Description
Technical Field
The present invention relates to the field of data transmission, and in particular, to a method, an apparatus, a system, and a server for video transmission.
Background
With the continuous development of private network technology, the application of wireless video monitoring is more and more extensive.
In the process of wireless video monitoring, video streams generated by the cameras are firstly transmitted to the base station and then transmitted to the dispatching desk through a link between the base station and the core network, and then videos monitored by the different cameras can be watched on the dispatching desk.
When the number of the cameras is large, the video stream generated by each camera passes through the core network, so that the processing pressure of the core network is large, and more core network resources are consumed.
Disclosure of Invention
In view of this, the present invention provides a method, an apparatus, a system and a server for video transmission, so as to solve the problem that when the number of cameras is large, a video stream generated by each camera passes through a core network, so that the processing pressure of the core network is large, and a large amount of core network resources are consumed.
In order to solve the technical problems, the invention adopts the following technical scheme:
a video transmission method is applied to a video server and comprises the following steps:
receiving a plurality of audio and video data streams sent by a local data exchange module; the audio and video data stream is obtained by the local data exchange module from audio and video data received by a corresponding camera device;
performing screen fusion operation on the audio and video data streams to obtain audio and video data streams subjected to screen fusion;
and directly outputting the audio and video data stream after screen fusion, or transmitting the audio and video data stream after screen fusion to a core network, so that the core network outputs the audio and video data stream after screen fusion.
Preferably, the directly outputting the audio-video data stream after screen melting comprises:
directly outputting the audio and video data stream after screen fusion to a dispatching desk through an audio and video transmission channel;
the creating process of the audio and video transmission channel comprises the following steps:
receiving a virtual equipment creating request sent by a video signaling control center; the virtual equipment creating request carries screen-melting template information and information of equipment to be screen-melted, and is generated by the video signaling control center according to the screen-melting creating request sent by the dispatching desk;
creating virtual screen-melting equipment according to the virtual equipment creating request, and sending an equipment number of the created virtual screen-melting equipment to the video signaling control center;
and creating the audio and video transmission channel which performs data communication with the dispatching desk in the virtual screen fusing equipment.
Preferably, the creating, in the virtual screen-melting device, the audio/video transmission channel in data communication with the dispatch console includes:
receiving a transmission channel establishing request sent by the video signaling control center; wherein, the transmission channel establishing request comprises the media information of the dispatching desk;
adding the audio and video transmission channel which performs data flow with the dispatching desk in the virtual screen fusing equipment, and sending the channel number of the audio and video transmission channel and the media information of the video server to the video signaling control center;
after the video signaling control center sends the media information of the video server to the dispatching desk, the audio and video transmission channel can carry out data circulation.
Preferably, after the video signaling control center sends the media information of the video server to the scheduling console, the method further includes:
and after the dispatching desk controls each camera device to be started through the video signaling control center, establishing a streaming media transmission channel for data transmission with each camera device to be screen-fused according to the information of the equipment to be screen-fused.
Preferably, directly outputting the audio and video data stream after screen fusion, or transmitting the audio and video data stream after screen fusion to a core network, so that after the core network outputs the audio and video data stream after screen fusion, the method further includes:
when audio and video data stream transmission after screen fusion is not required, receiving a virtual screen fusion equipment closing instruction sent by the video signaling control center; the virtual screen-melting equipment closing instruction is generated after the video signaling control center receives a screen-melting pull-up release request sent by the core network;
and closing the created virtual screen-melting equipment according to the virtual screen-melting equipment closing instruction.
An apparatus for video transmission, applied to a video server, the apparatus comprising:
the video stream receiving module is used for receiving a plurality of audio and video data streams sent by the local data exchange module; the audio and video data stream is obtained by the local data exchange module from audio and video data received by a corresponding camera device;
the screen fusing module is used for carrying out screen fusing operation on the audio and video data streams to obtain the audio and video data streams after screen fusing;
and the video stream sending module is used for directly outputting the audio and video data stream after screen fusion, or transmitting the audio and video data stream after screen fusion to a core network so that the core network outputs the audio and video data stream after screen fusion.
Preferably, the video stream transmission module includes:
the output submodule is used for directly outputting the audio and video data stream subjected to screen fusion to a dispatching desk through an audio and video transmission channel;
the device further comprises:
the request receiving module is used for receiving a virtual equipment creating request sent by a video signaling control center; the virtual equipment creating request carries screen-melting template information and information of equipment to be screen-melted, and is generated by the video signaling control center according to the screen-melting creating request sent by the dispatching desk;
the creating module is used for creating virtual screen-melting equipment according to the virtual equipment creating request and sending the equipment number of the created virtual screen-melting equipment to the video signaling control center;
and the channel establishing module is used for establishing the audio and video transmission channel which performs data communication with the dispatching desk in the virtual screen melting equipment.
Preferably, the channel establishing module includes:
a request receiving unit, configured to receive a transmission channel creation request sent by the video signaling control center; wherein, the transmission channel establishing request comprises the media information of the dispatching desk;
the channel creating unit is used for adding the audio and video transmission channel which performs data flow with the dispatching desk in the virtual screen melting equipment and sending the channel number of the audio and video transmission channel and the media information of the video server to the video signaling control center;
after the video signaling control center sends the media information of the video server to the dispatching desk, the audio and video transmission channel can carry out data circulation.
A video server, comprising: a processor, a transmitting port and a receiving port;
the receiving port is used for receiving a plurality of audio and video data streams sent by the local data exchange module; the audio and video data stream is obtained by the local data exchange module from audio and video data received by a corresponding camera device;
the processor is used for performing screen fusion operation on the audio and video data streams to obtain audio and video data streams after screen fusion;
and the sending port is used for directly outputting the audio and video data stream after screen fusion, or transmitting the audio and video data stream after screen fusion to a core network, so that the core network outputs the audio and video data stream after screen fusion.
A system for video transmission, comprising:
the system comprises a local data exchange module, a video server and a dispatching desk;
the local data exchange module is used for receiving audio and video data sent by the plurality of camera devices, acquiring audio and video data streams from each piece of audio and video data, and sending the acquired audio and video data streams to the video server;
the video server is used for receiving the audio and video data streams sent by the local data exchange module, performing screen fusion operation on the audio and video data streams to obtain audio and video data streams subjected to screen fusion, and transmitting the audio and video data streams subjected to screen fusion to the dispatching desk;
and the dispatching desk is used for receiving the audio and video data stream after screen fusion directly or through a core network.
Compared with the prior art, the invention has the following beneficial effects:
the invention provides a video transmission method, a device, a system and a server, which can directly transmit audio and video data streams after screen fusion to a dispatching desk without passing through a core network, thereby reducing the processing pressure of the core network. Or transmitting the audio and video data stream after screen fusion to a core network so that the core network transmits the audio and video data stream after screen fusion to a dispatching desk, wherein the core network transmits the audio and video data after screen fusion, the audio and video data after screen fusion is a path of audio and video data stream converted from multiple paths of audio and video data streams, and resources required for receiving the path of audio and video data stream are smaller than those required for receiving the multiple paths of audio and video data streams, so that the processing pressure of the core network can be reduced.
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 embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a flow chart of a method of video transmission according to the present invention;
FIG. 2 is a flow chart of another method of video transmission according to the present invention;
FIG. 3 is a flow chart of the operation of the present invention before video transmission;
fig. 4 is a flow chart of creating an audio/video transmission channel according to the present invention;
fig. 5 is a schematic structural diagram of a video transmission apparatus according to 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 derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the invention provides a video transmission method which is applied to a video server. Referring to fig. 1, the method of video transmission may include:
s11, receiving a plurality of audio and video data streams sent by the local data exchange module;
the audio and video data stream is obtained by the local data exchange module from audio and video data received by the corresponding camera device. The local data switching module may be denoted as LIPA gateway L-GW.
Specifically, the local data exchange module is close to the base station, the camera device sends the acquired audio and video data to the base station through a Long Term Evolution (LTE) air interface of the universal mobile communication technology, and then the base station sends the audio and video data to the local data exchange module. The local data exchange module removes the head of the encapsulation protocol GTPU from each received audio/video data, and extracts the audio/video stream in the audio/video data, which is the audio/video data stream in this embodiment. Wherein the camera device may comprise a camera.
The local data exchange module then sends the plurality of audio-visual data streams to the video server. The video server is arranged at a position close to the local data exchange module base station.
It should be noted that the base station receives which video and audio data of the cameras are determined by the dispatch station, and the base station receives the video and audio data sent by the corresponding cameras when the dispatch station wants to watch which videos shot by the cameras.
S12, performing screen fusion operation on the audio and video data streams to obtain audio and video data streams after screen fusion;
specifically, the screen fusion operation is performed on a plurality of audio and video data streams, which means that a plurality of paths of audio and video data streams are synthesized into one path of audio and video data stream, that is, the audio and video data stream after screen fusion can be obtained.
In addition, after the video server receives the plurality of audio and video data, the operations of frequency selection, frequency superposition, compression and local storage can be carried out on the plurality of audio and video data.
S13, directly outputting the audio and video data stream after screen fusion, or transmitting the audio and video data stream after screen fusion to a core network, so that the core network outputs the audio and video data stream after screen fusion.
Specifically, the video server may communicate with the dispatch station directly or through a core network.
In this embodiment, the audio and video data flow channel after screen fusion can be directly transmitted to the dispatching desk without passing through the core network, so that the processing pressure of the core network can be reduced. Or transmitting the audio and video data stream after screen fusion to a core network so that the core network transmits the audio and video data stream after screen fusion to a dispatching desk, wherein the core network transmits the audio and video data after screen fusion, the audio and video data after screen fusion is a path of audio and video data stream converted from multiple paths of audio and video data streams, and resources required for receiving the path of audio and video data stream are smaller than those required for receiving the multiple paths of audio and video data streams, so that the processing pressure of the core network can be reduced.
Optionally, on the basis of the video transmission method, directly outputting the audio-video data stream after the screen is melted includes:
directly outputting the audio and video data stream after screen fusion to a dispatching desk through an audio and video transmission channel;
in addition, referring to fig. 2, the creating process of the audio/video transmission channel may include:
s21, receiving a virtual equipment creating request sent by a video signaling control center;
the virtual equipment creating request carries screen-melting template information and information of equipment to be screen-melted, and is generated by the video signaling control center according to the screen-melting creating request sent by the dispatching desk. The video signaling control center may be represented by a video signaling control network element V-SIG.
Specifically, the dispatching desk sends a screen-melting creation request to the video signaling control center, wherein the screen-melting creation request carries information of the device to be screen-melted, information of the screen-melting specification and media information of the dispatching desk.
The screen-melting equipment information refers to which videos generated by the camera devices need to be subjected to screen melting operation. The screen-melting specification information refers to a mode in which screen melting is performed, for example, 4 frames or 16 frames, that is, the screen-melting specification information is a specification parameter of screen melting, such as data of screen melting number, resolution, and the like. The media information of the dispatching desk refers to session description protocol SDP parameters of the dispatching desk, such as data of transmission ports, transmission protocols and the like of the dispatching desk.
And after receiving the screen fusion creation request, the video signaling control center stores the screen fusion creation request, generates a virtual device creation request and sends the virtual device creation request to the video server. The virtual equipment creating request carries screen-melting template information and information of equipment to be screen-melted. The screen-melting template information is a screen-melting model determined by the video signaling control center according to the screen-melting specification information. In addition, the information of the device to be screen-fused is explained above, and is not described in detail here.
S22, creating a virtual screen-melting device according to the virtual device creating request, and sending the device number of the created virtual screen-melting device to the video signaling control center;
specifically, the video server creates a virtual screen-melting device according to screen-melting template information in the virtual device creation request, and the virtual screen-melting device is used for synthesizing multiple audio and video data streams to obtain one audio and video data stream.
After the video server creates the virtual screen-melting device, the video server sends the device number of the created virtual screen-melting device to the video signaling control center, and then the video signaling control center stores the device number of the virtual screen-melting device.
S23, receiving a transmission channel establishing request sent by the video signaling control center;
wherein, the request for creating transmission channel includes the media information of the dispatching station.
Specifically, after the video signaling control center stores the device number of the virtual screen fusing device, a transmission channel creation request is generated, and the transmission channel creation request is sent to the video server. The transmission channel creation request is for creating a transmission channel between the video server and the scheduling station.
S24, adding the audio and video transmission channel which performs data flow with the dispatching desk in the virtual screen melting equipment, and sending the channel number of the audio and video transmission channel and the media information of the video server to the video signaling control center;
after the video signaling control center sends the media information of the video server to the dispatching desk, the audio and video transmission channel can carry out data circulation.
Specifically, the video server adds an audio/video transmission channel in the virtual screen fusing device, and returns a channel number of the audio/video transmission channel and media information of the video server to the video signaling control center.
Optionally, on the basis of this embodiment, after the video signaling control center sends the media information of the video server to the scheduling console, the method further includes:
and after the dispatching desk controls each camera device to be started through the video signaling control center, establishing a streaming media transmission channel for data transmission with each camera device to be screen-fused according to the information of the equipment to be screen-fused.
Specifically, after the video signaling control center sends the media information of the video server to the scheduling console, the video server may directly communicate with the scheduling console, and it is determined which image capturing devices perform screen fusion in the information of the device to be screen fused in the above steps, and at this time, the video server needs to be connected to the image capturing devices.
Before the video server is connected with the camera device, the camera device is connected with the network, establishes a bearer with the local data exchange module and is registered in the video server.
After the dispatching desk controls each camera device to be started through the video signaling control center, the camera device is registered in the video server, the camera device is connected to the video server, and at the moment, the video server can establish a streaming media transmission channel for data transmission with each camera device to be subjected to screen fusion, namely, the video server can receive data sent by the camera device.
In this embodiment, a process of creating an audio/video transmission channel through which a video server and a scheduling console perform data communication is provided, and the audio/video transmission channel created in this embodiment may be used to perform video transmission, so that videos shot by each camera device may directly reach the scheduling console without passing through a core network, and pressure of the core network is reduced.
It should be noted that, in this embodiment, steps S23 and S24 are specific implementation processes of creating the audio/video transmission channel in the virtual screen fusing device, where data flow is performed with the dispatching console, and in addition, other means may also be used to implement creating the audio/video transmission channel in the virtual screen fusing device, where data flow is performed with the dispatching console.
In addition, the embodiment discloses a process for creating an audio/video transmission channel, where a core network and a video server may communicate through another audio/video transmission channel, the process for creating the audio/video transmission channel is similar to the process for creating the audio/video transmission channel described above, except that media information of the core network is carried in a transmission channel creation request, a video signaling control center sends the media information of the video server to the core network, and other steps refer to the process for creating the audio/video transmission channel described above.
Optionally, on the basis of the previous embodiment, after the step S13, the method may further include:
when audio and video data stream transmission after screen fusion is not required, receiving a virtual screen fusion equipment closing instruction sent by the video signaling control center; the virtual screen-melting equipment closing instruction is generated after the video signaling control center receives a screen-melting pull-up release request sent by the core network;
and closing the created virtual screen-melting equipment according to the virtual screen-melting equipment closing instruction.
Specifically, when the dispatching desk determines that the video collected by the camera device is not watched, that is, audio-video data stream transmission after screen fusion is not needed, the dispatching desk generates and issues a screen fusion pull-up release request to the video signaling control center, the video signaling control center then generates and sends an instruction for closing the virtual screen fusion device to the video server, and the video server releases the created virtual screen fusion device, so that screen fusion pull-up release can be completed.
In this embodiment, when the screen-fusing operation is not required, the created virtual screen-fusing device can be closed, and then the videos shot by the respective cameras can be separately transmitted to the scheduling console.
In order to make the content of the present invention more clear to those skilled in the art, the present solution will now be described by a process of interacting from a plurality of devices, and specifically referring to fig. 3 to 4.
Fig. 3 illustrates preparation before the image pickup apparatus performs video transmission with the video server. The camera device may be a camera.
First, the camera needs to establish a bearer with the L-GW through the base station, and after the establishment of the bearer is completed, step S11 is executed.
And S11, registering the camera in the video server.
Specifically, the camera performs user registration with the video server, and the registration includes recording login information and a login password of the camera in the video server.
S12, the video signaling control center sends a command for controlling the camera to be opened to the video server;
specifically, the instruction is used for controlling each camera to be opened by the video server.
The control camera device turn-on instruction is generated by the video signaling control center after receiving a camera turn-on instruction sent by the dispatching desk.
S13, establishing a streaming media transmission channel between the camera and the video server;
specifically, a streaming media transmission channel is established between the video server and each camera to be subjected to screen fusion. And then the camera can carry out video transmission with the video server.
It should be noted that the established streaming media transmission channel is a channel of a camera-base station- (L-GW) -video server.
S14, the video server sends a response of opening the camera device to the video signaling control center;
wherein the response is used to inform the video signaling control center that the camera has been turned on.
S15, the video signaling control center sends a recording starting instruction to the video server;
the recording starting instruction is sent after the video signaling control center receives the video recording instruction of the dispatching desk.
And S16, the video server sends a recording starting response to the video signaling control center.
Specifically, the video signaling control center sends a recording start instruction to the video server, and at this time, the video server replies a recording start response, and then the video server controls the camera to be screen-fused to record a video.
Fig. 4 illustrates a process of creating an audio-video transmission channel.
After the camera is turned on and normal communication with the video server is enabled, the following steps are performed.
S11, the dispatching desk sends a screen-melting establishing request to the video signaling control center;
wherein the request is for performing a screen-scrolling operation.
S12, the video signaling control center sends a virtual device creating request to the video server;
s13, the video server sends a response of opening the virtual equipment to the video signaling control center;
and the response comprises the device number of the created virtual screen melting device.
S14, the video signaling control center sends a transmission channel establishing request to the video server;
s15, the video server sends a transmission channel establishing response to the video signaling control center;
wherein, the response includes the channel number of the transmission channel and the media information of the video server.
S16, the video signaling control center sends a screen-melting response to the dispatching desk;
wherein, the response includes the media information of the video server.
After the dispatching desk receives the media information of the video server, the video server and the dispatching desk know the media information of the other party mutually, and then the video server and the dispatching desk can communicate with each other,
and S17, uploading the screen melting image.
After the video server and the dispatching desk can communicate with each other, the screen-melting image can be uploaded.
Before uploading the screen-melting image, the video server has established a streaming media transmission channel with each camera to be screen-melted.
In the invention, the screen fusion and other operations of the multi-channel video are carried out at the base station side, so that the transmission bandwidth from the base station to the core network can be effectively saved, and the cost of renting or constructing a transmission channel link is reduced. By recording and videotaping at the base station side, audio and video are not required to be transmitted to a core network for processing, the processing pressure of the core network can be effectively relieved, and the processing efficiency of the whole audio and video is remarkably improved. And moreover, the audio and video processing is carried out at the base station side, so that the transmission reliability of the audio and video can be improved.
On the basis of the above embodiment of the video transmission method, another embodiment of the present invention provides a video transmission apparatus, applied to a video server, and referring to fig. 5, the apparatus includes:
a video stream receiving module 101, configured to receive multiple audio and video data streams sent by the local data exchange module; each audio and video data stream is obtained by the local data exchange module from audio and video data received by the corresponding camera device;
the screen fusing module 102 is configured to perform screen fusing operation on the plurality of audio and video data streams to obtain audio and video data streams after screen fusing;
and the video stream sending module 103 is configured to directly output the audio and video data stream after screen fusion, or transmit the audio and video data stream after screen fusion to a core network, so that the core network outputs the audio and video data stream after screen fusion.
In this embodiment, the audio and video data stream after screen fusion can be directly transmitted to the dispatching desk without passing through the core network, so that the processing pressure of the core network can be reduced. Or transmitting the audio and video data stream after screen fusion to a core network so that the core network transmits the audio and video data stream after screen fusion to a dispatching desk, wherein the core network transmits the audio and video data after screen fusion, the audio and video data after screen fusion is a path of audio and video data stream converted from multiple paths of audio and video data streams, and resources required for receiving the path of audio and video data stream are smaller than those required for receiving the multiple paths of audio and video data streams, so that the processing pressure of the core network can be reduced.
It should be noted that, for the working process of each module in this embodiment, please refer to the corresponding description in the above embodiments, which is not described herein again.
Alternatively, on the basis of the above-described embodiment of the apparatus for video transmission,
the video stream transmitting module comprises:
the output submodule is used for directly outputting the audio and video data stream subjected to screen fusion to a dispatching desk through an audio and video transmission channel;
further, still include:
the request receiving module is used for receiving a virtual equipment creating request sent by a video signaling control center; the virtual equipment creating request carries screen-melting template information and information of equipment to be screen-melted, and is generated by the video signaling control center according to the screen-melting creating request sent by the dispatching desk;
the creating module is used for creating virtual screen-melting equipment according to the virtual equipment creating request and sending the equipment number of the created virtual screen-melting equipment to the video signaling control center;
and the channel establishing module is used for establishing the audio and video transmission channel which performs data communication with the dispatching desk in the virtual screen melting equipment.
Further, the channel establishing module includes:
a request receiving unit, configured to receive a transmission channel creation request sent by the video signaling control center; wherein, the transmission channel establishing request comprises the media information of the dispatching desk;
the channel creating unit is used for adding the audio and video transmission channel which performs data flow with the dispatching desk in the virtual screen melting equipment and sending the channel number of the audio and video transmission channel and the media information of the video server to the video signaling control center;
after the video signaling control center sends the media information of the video server to the dispatching desk, the audio and video transmission channel can carry out data circulation.
Further, still include:
and the channel creation module is used for establishing a streaming media transmission channel for carrying out data transmission with each camera device to be screen-fused according to the information of the equipment to be screen-fused after the video signaling control center sends the media information of the video server to the dispatching desk and after the dispatching desk controls each camera device to be started through the video signaling control center.
In this embodiment, a process of creating an audio/video transmission channel through which a video server and a scheduling console perform data communication is provided, and the audio/video transmission channel created in this embodiment may be used to perform video transmission, so that videos shot by each camera device may directly reach the scheduling console without passing through a core network, and pressure of the core network is reduced.
It should be noted that, for the working processes of each module and unit in this embodiment, please refer to the corresponding descriptions in the above embodiments, which are not described herein again.
Optionally, on the basis of the above embodiment, the method further includes:
the instruction receiving module is used for directly outputting the audio and video data stream after screen fusion by the video stream sending module, or transmitting the audio and video data stream after screen fusion to a core network, so that after the core network outputs the audio and video data stream after screen fusion, when the audio and video data stream after screen fusion is not required to be transmitted, a virtual screen fusion equipment closing instruction sent by the video signaling control center is received; the virtual screen-melting equipment closing instruction is generated after the video signaling control center receives a screen-melting pull-up release request sent by the core network;
and the closing module is used for closing the created virtual screen melting equipment according to the virtual screen melting equipment closing instruction.
In this embodiment, when the screen-fusing operation is not required, the created virtual screen-fusing device can be closed, and then the videos shot by the respective cameras can be separately transmitted to the scheduling console.
It should be noted that, for the working process of each module in this embodiment, please refer to the corresponding description in the above embodiments, which is not described herein again.
Optionally, on the basis of the above embodiments of the method and apparatus for video transmission applied to the video server, another embodiment of the present invention provides a video server, including: a processor, a transmitting port and a receiving port;
the receiving port is used for receiving a plurality of audio and video data streams sent by the local data exchange module; the audio and video data stream is obtained by the local data exchange module from audio and video data received by a corresponding camera device;
the processor is used for performing screen fusion operation on the audio and video data streams to obtain audio and video data streams after screen fusion;
and the sending port is used for directly outputting the audio and video data stream after screen fusion, or transmitting the audio and video data stream after screen fusion to a core network, so that the core network outputs the audio and video data stream after screen fusion.
In this embodiment, the audio and video data stream after screen fusion can be directly transmitted to the dispatching desk without passing through the core network, so that the processing pressure of the core network can be reduced. Or transmitting the audio and video data stream after screen fusion to a core network so that the core network transmits the audio and video data stream after screen fusion to a dispatching desk, wherein the core network transmits the audio and video data after screen fusion, the audio and video data after screen fusion is a path of audio and video data stream converted from multiple paths of audio and video data streams, and resources required for receiving the path of audio and video data stream are smaller than those required for receiving the multiple paths of audio and video data streams, so that the processing pressure of the core network can be reduced.
Optionally, on the basis of the embodiments of the method and the apparatus for video transmission, another embodiment of the present invention provides a system for video transmission, including:
the system comprises a local data exchange module, a video server and a dispatching desk;
the local data exchange module is used for receiving audio and video data sent by the plurality of camera devices, acquiring audio and video data streams from each piece of audio and video data, and sending the acquired audio and video data streams to the video server;
the video server is used for receiving the audio and video data streams sent by the local data exchange module, performing screen fusion operation on the audio and video data streams to obtain audio and video data streams subjected to screen fusion, and transmitting the audio and video data streams subjected to screen fusion to the dispatching desk;
and the dispatching desk is used for receiving the audio and video data stream after screen fusion directly or through a core network.
In this embodiment, the audio and video data stream after screen fusion can be directly transmitted to the dispatching desk without passing through the core network, so that the processing pressure of the core network can be reduced. Or transmitting the audio and video data stream after screen fusion to a core network so that the core network transmits the audio and video data stream after screen fusion to a dispatching desk, wherein the core network transmits the audio and video data after screen fusion, the audio and video data after screen fusion is a path of audio and video data stream converted from multiple paths of audio and video data streams, and resources required for receiving the path of audio and video data stream are smaller than those required for receiving the multiple paths of audio and video data streams, so that the processing pressure of the core network can be reduced.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A method for video transmission, applied to a video server, the method comprising:
receiving a plurality of audio and video data streams sent by a local data exchange module; the audio and video data stream is obtained by the local data exchange module from audio and video data received by a corresponding camera device; the distances between the video server and the local data exchange module and a base station are smaller than corresponding preset values, and the local data exchange module is a gateway;
performing screen fusion operation on the audio and video data streams to obtain the audio and video data streams after screen fusion, wherein the screen fusion operation comprises the following steps: synthesizing a plurality of audio-video data streams into one audio-video data stream to obtain an audio-video data stream after screen fusion;
and directly outputting the audio and video data stream after screen fusion to a dispatching desk through a pre-established audio and video transmission channel, or transmitting the audio and video data stream after screen fusion to a core network, so that the core network outputs the audio and video data stream after screen fusion.
2. The method according to claim 1, wherein the creation process of the audio-video transmission channel comprises:
receiving a virtual equipment creating request sent by a video signaling control center; the virtual equipment creating request carries screen-melting template information and information of equipment to be screen-melted, and is generated by the video signaling control center according to the screen-melting creating request sent by the dispatching desk;
creating virtual screen-melting equipment according to the virtual equipment creating request, and sending an equipment number of the created virtual screen-melting equipment to the video signaling control center;
and creating the audio and video transmission channel which performs data communication with the dispatching desk in the virtual screen fusing equipment.
3. The method according to claim 2, wherein creating the audio/video transmission channel in the virtual screen-melting device, which is in data communication with the dispatcher station, comprises:
receiving a transmission channel establishing request sent by the video signaling control center; wherein, the transmission channel establishing request comprises the media information of the dispatching desk;
adding the audio and video transmission channel which performs data flow with the dispatching desk in the virtual screen fusing equipment, and sending the channel number of the audio and video transmission channel and the media information of the video server to the video signaling control center;
after the video signaling control center sends the media information of the video server to the dispatching desk, the audio and video transmission channel can carry out data circulation.
4. The method of claim 3, wherein after the video signaling control center sends the media information of the video server to the dispatching desk, the method further comprises:
and after the dispatching desk controls each camera device to be started through the video signaling control center, establishing a streaming media transmission channel for data transmission with each camera device to be screen-fused according to the information of the equipment to be screen-fused.
5. The method of claim 4, wherein outputting the audio-video data stream after the screen fusion directly or transmitting the audio-video data stream after the screen fusion to a core network, so that after the core network outputs the audio-video data stream after the screen fusion, the method further comprises:
when audio and video data stream transmission after screen fusion is not required, receiving a virtual screen fusion equipment closing instruction sent by the video signaling control center; the virtual screen-melting equipment closing instruction is generated after the video signaling control center receives a screen-melting pull-up release request sent by the core network;
and closing the created virtual screen-melting equipment according to the virtual screen-melting equipment closing instruction.
6. An apparatus for video transmission, applied to a video server, the apparatus comprising:
the video stream receiving module is used for receiving a plurality of audio and video data streams sent by the local data exchange module; the audio and video data stream is obtained by the local data exchange module from audio and video data received by a corresponding camera device; the distances between the video server and the local data exchange module and a base station are smaller than corresponding preset values, and the local data exchange module is a gateway;
and the screen melting module is used for performing screen melting operation on the audio and video data streams to obtain the audio and video data streams after screen melting, and comprises the following steps: synthesizing a plurality of audio-video data streams into one audio-video data stream to obtain an audio-video data stream after screen fusion;
and the video stream sending module is used for directly outputting the audio and video data streams subjected to screen fusion to a dispatching desk through a pre-established audio and video transmission channel, or transmitting the audio and video data streams subjected to screen fusion to a core network so that the core network outputs the audio and video data streams subjected to screen fusion.
7. The apparatus of claim 6, wherein the video streaming module comprises:
the output submodule is used for directly outputting the audio and video data stream subjected to screen fusion to a dispatching desk through an audio and video transmission channel;
the device further comprises:
the request receiving module is used for receiving a virtual equipment creating request sent by a video signaling control center; the virtual equipment creating request carries screen-melting template information and information of equipment to be screen-melted, and is generated by the video signaling control center according to the screen-melting creating request sent by the dispatching desk;
the creating module is used for creating virtual screen-melting equipment according to the virtual equipment creating request and sending the equipment number of the created virtual screen-melting equipment to the video signaling control center;
and the channel establishing module is used for establishing the audio and video transmission channel which performs data communication with the dispatching desk in the virtual screen melting equipment.
8. The apparatus of claim 7, wherein the channel establishing module comprises:
a request receiving unit, configured to receive a transmission channel creation request sent by the video signaling control center; wherein, the transmission channel establishing request comprises the media information of the dispatching desk;
the channel creating unit is used for adding the audio and video transmission channel which performs data flow with the dispatching desk in the virtual screen melting equipment and sending the channel number of the audio and video transmission channel and the media information of the video server to the video signaling control center;
after the video signaling control center sends the media information of the video server to the dispatching desk, the audio and video transmission channel can carry out data circulation.
9. A video server, comprising: a processor, a transmitting port and a receiving port;
the receiving port is used for receiving a plurality of audio and video data streams sent by the local data exchange module; the audio and video data stream is obtained by the local data exchange module from audio and video data received by a corresponding camera device; the distances between the video server and the local data exchange module and a base station are smaller than corresponding preset values, and the local data exchange module is a gateway;
the processor is configured to perform a screen-melting operation on the audio and video data streams to obtain a screen-melted audio and video data stream, where the screen-melting operation includes: synthesizing a plurality of audio-video data streams into one audio-video data stream to obtain an audio-video data stream after screen fusion;
and the sending port is used for directly outputting the audio and video data streams subjected to screen fusion to a dispatching desk through a pre-established audio and video transmission channel, or transmitting the audio and video data streams subjected to screen fusion to a core network, so that the core network outputs the audio and video data streams subjected to screen fusion.
10. A system for video transmission, comprising:
the system comprises a local data exchange module, a video server and a dispatching desk;
the local data exchange module is used for receiving audio and video data sent by the plurality of camera devices, acquiring audio and video data streams from each piece of audio and video data, and sending the acquired audio and video data streams to the video server; the distances between the video server and the local data exchange module and a base station are smaller than corresponding preset values, and the local data exchange module is a gateway;
the video server is used for receiving the audio and video data streams sent by the local data exchange module, performing screen fusion operation on the audio and video data streams to obtain audio and video data streams subjected to screen fusion, and directly transmitting the audio and video data streams subjected to screen fusion to the dispatching desk through a pre-established audio and video transmission channel; performing screen fusion operation on the audio and video data streams to obtain the audio and video data streams after screen fusion, wherein the screen fusion operation comprises the following steps: synthesizing a plurality of audio-video data streams into one audio-video data stream to obtain an audio-video data stream after screen fusion;
and the dispatching desk is used for receiving the audio and video data stream after screen fusion directly or through a core network.
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