CN111464774B - Method and device for live broadcasting or on-demand broadcasting of video conference - Google Patents
Method and device for live broadcasting or on-demand broadcasting of video conference Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/14—Systems for two-way working
- H04N7/15—Conference systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
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- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/60—Network streaming of media packets
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- H04L67/00—Network arrangements or protocols for supporting network services or applications
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- H04L67/55—Push-based network services
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- 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
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- 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 or manipulating encoded video stream scene graphs
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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
- H04N21/2387—Stream processing in response to a playback request from an end-user, e.g. for trick-play
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Abstract
The application discloses a method and a device for live broadcasting or on-demand broadcasting of a video conference, which relate to the field of video conferences and comprise the following steps: acquiring conference audio and video data; transmitting the audio and video data to a multimedia scheduling server; the multimedia scheduling server pushes the audio and video data to a client live broadcasting interface or pushes the audio and video data to a client on-demand interface in a list form; the purposes that the investment of the original video conference of a client is not wasted, the original video conference system is not required to be modified, and the original video conference implementation mode is not required are achieved; the audio and video of the video conference can be directly obtained from the audio and video matrix used by the original video conference of the client, and the method is simple and convenient; compared with the traditional back-to-back video conference terminal mode, the video conference is expanded, and the problem that a large-capacity terminal which cannot be solved can watch the live video conference at the same time is solved.
Description
Technical Field
The present application relates to the field of video conferences, and in particular, to a method and an apparatus for live or on-demand video conference.
Background
The video conference system generally has strict limitation on the number of people participating in a conference at the same time, the number of participants is increased, and the cost of the video conference system is greatly increased. However, due to practical needs, sometimes a conference requires many people to participate, at least to watch.
A common solution to the above problem is as follows:
the first scheme is as follows: the cross-network multi-party video conference system is realized, video and audio signals are switched by using an audio and video matrix, so that the conference systems of the first unit and the second unit realize audio and video sharing, and finally, the cross-network and unit video conference is held. The concrete scheme can be seen in patent CN 106851173A. Other similar implementation modes include that the traditional video conference system is built in a mode of converting an audio/video matrix into an IP network server side, and the video conference system based on the IP is used for extending the video conference. The specific scheme of this implementation can be seen in patent CN 109379554A.
Scheme II: the video conference live broadcast is generally realized by combining a video conference and an internet live broadcast technology. For example, the streaming media server maintains and receives real-time signals of each video conference room pushed by the video conference center server, updates and sends a conference room directory list in real time, and the terminal can select a certain conference room through the conference room list to watch live broadcasts. The method needs the video conference center server to perform customized development aiming at different streaming media servers, and a specific scheme can be seen in patent CN 108833175A.
A disadvantage of the first solution is that back-to-back extension through multiple video conferencing systems is costly. In addition, in the traditional video conference system, the number of participants in one video conference room is not too many, and more participants are more than ten. When a videoconference requires the participation of hundreds, or thousands, of people scattered around the site. Solution one cannot solve this problem.
The second scheme has the disadvantages that the existing video conference system needs to be modified, the control surface and the media surface need to be modified, the control surface informs the streaming media server for live broadcasting of the situations of the stop of the holding of each conference room and the like, and the media surface transmits the audio and video of the video conference to the streaming media server for live broadcasting. If the existing video conference system cannot be modified, the existing video conference system needs to be replaced, and the methods are not feasible in actual business operation.
Disclosure of Invention
The embodiment of the application provides a method and a device for live or on-demand video conference, which solve the problems of high cost and low feasibility in the prior art.
The embodiment of the application adopts the following technical scheme: a method for video conference live broadcasting or on demand includes the following steps:
acquiring conference audio and video data;
transmitting the audio and video data to a multimedia scheduling server;
the multimedia scheduling server pushes audio and video data to a client live interface or the client acquires a video conference list from the multimedia scheduling server, and the client selects one of the video conferences for on-demand.
Further, the acquiring audio and video data includes the following steps: converting the audio and video information into audio and video signals through an audio and video matrix; accessing the audio and video signals into an encoder; the encoder converts the audio and video signals into audio and video data.
Further, transmitting the audio and video data to the multimedia scheduling server includes: multiple encoders can be accessed to the same multimedia scheduling server and an appropriate transmission mode is selected to transmit audio and video data to the multimedia scheduling server (it is explained that each encoder corresponds to an audio and video matrix, and can be understood that each encoder corresponds to a video conference).
Further, the multimedia scheduling server pushing the audio and video data to the client live interface comprises the following steps: selecting a designated client by the multimedia dispatching desk; selecting a proper pushing method by the multimedia dispatching desk; and the multimedia dispatching desk pushes the audio and video data acquired by the multimedia dispatching server to a specified client.
Further, the step of acquiring the video conference list by the client-side on-demand interface includes the following steps: the multimedia dispatching desk sets a video conference list which is authorized to be requested by a specific client, and the client selects a proper acquisition mode to acquire the video conference list from the multimedia dispatching server (the subsequent client can select one from the list to request the video conference).
Further, the multimedia scheduling server pushing a certain path of audio and video data to the client live interface further comprises: all video live broadcast clients needing live broadcast of the conference can be grouped in advance in the multimedia scheduling server; and the multimedia scheduling server pushes the audio and video data to a corresponding grouping.
Further, the transmission mode includes: HTTP, HTTPS, SIP, ONVIF, RTSP, RTP/RTCP, TCP, UDP, and GB/T28181.
Further, the obtaining method includes: SIP, HTTP, HTTPS, RTSP, TCP, and UDP.
Further, the following situations are also included when the multimedia scheduling server pushes the audio and video data to the client or pushes the audio and video data to the client in a list form: and if the client side is provided with the B-Trunc private network, the multimedia scheduling server pushes the audio and video data to one or more specific B-Trunc groups and pushes the audio and video data to the client side through the B-Trunc private network.
A device of a video conference live broadcast or on-demand method comprises the following steps: the system comprises an encoder, a multimedia scheduling server, a multimedia scheduling platform and a video live broadcast client; the encoder is electrically connected with the audio and video matrix through the HDMI; the encoder, the multimedia dispatching server, the multimedia dispatching desk and the video live broadcasting client are connected through an IP network. The input end of the encoder is connected with the audio and video matrix in modes of HDMI and the like. The system comprises an encoder, a multimedia dispatching server, a multimedia dispatching desk and a video live broadcasting client side which are connected through an IP network.
The encoder acquires video and audio bare data of the video conference from the audio and video matrix, and converts the video and audio bare data into RTP stream based on IP encapsulation or PS stream of the media surface of GB/T28181 (audio encapsulation needs extension coding).
The multimedia dispatching server establishes a session (which can be in a GB/T28181, SIP, TCP or the like) with the encoder, and obtains the audio and video of the video conference. And the video is forwarded to a multimedia dispatching desk or a video live broadcast client through ways of SIP session and the like.
The multimedia dispatching desk is client software, generally visual dispatching software on a PC (personal computer), and can also be visual dispatching software running on a flat panel. The multimedia dispatcher station serves as a SIP client and registers with a multimedia dispatch server (SIP server) and a B-Trunc core network (SIP server) at the same time. The multimedia dispatching desk can obtain the audio and video of the appointed video conference through the multimedia dispatching server. And a plurality of video live broadcast clients can be selected and pushed to the specified video live broadcast clients. When the B-Trunc private network is connected, the multimedia dispatching desk can select one or more B-Trunc groups to carry out video conference pushing through the B-Trunc core network, and after the video conference pushing is carried out, live broadcasting is carried out on all terminals corresponding to the Btsunc groups.
The live video client is an APP installed on a mobile terminal (which can be a public network terminal or a private network terminal such as B-Trunc). When the video conference is directly pushed to the terminal in a public network mode, the live broadcast client side directly obtains the audio and video of the video conference from the multimedia scheduling server. When the B-Trunc private network video push group mode is adopted, the live video client acquires the audio and video of the video conference through the shared downlink channel
The embodiment of the application adopts at least one technical scheme which can achieve the following beneficial effects:
the invention does not waste the investment of the original video conference of the client, does not need any modification of the original video conference system, and has no requirement on the realization mode of the original video conference.
The invention obtains the audio and video of the video conference directly from the audio and video matrix used by the original video conference of the client. Is simple and convenient.
Compared with the traditional back-to-back video conference terminal mode, the video conference is expanded, and the problem that a large-capacity terminal cannot watch the live video conference at the same time is solved.
Under the B-Trunc private network, a video sharing channel can be used, so that a large number of terminals under a base station sector can watch the video conference live broadcast at the same time. Under the condition of not using a shared channel mode, a common IP mode is directly used, if one path of video of each terminal of 720P video occupies 2Mbps, one base station sector can only be used for simultaneously carrying out video conference live broadcast by about 10 terminals under the condition of a large downlink bandwidth configuration proportion. By using the shared channel, more than 100 terminals carry out video conference live broadcast in the same base station sector, and only one path of video conference bandwidth is occupied.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
fig. 1 is a schematic flowchart of a method for live or on-demand video conference provided in embodiment 1;
fig. 2 and fig. 3 are schematic flow charts of a method for live or on-demand video conference provided in embodiment 1 when there is no B-TrunC private network;
fig. 4 is a schematic flow chart of a method for live broadcasting or on-demand video conference in the presence of a B-TrunC private network according to embodiment 2;
fig. 5 is a schematic structural principle diagram of a device of a video conference live broadcasting or on-demand method provided in embodiment 3 when there is no B-TrunC private network;
fig. 6 is a schematic view of the overall media stream flow direction of the apparatus of the video conference live broadcasting or on-demand method provided in embodiment 3 when there is no B-TrunC private network;
fig. 7 is a schematic structural principle diagram of a device of a video conference live broadcasting or on-demand method provided in embodiment 4 when a B-TrunC private network exists;
fig. 8 is a schematic view of the overall media stream flow when a device of a video conference live broadcasting or on-demand method provided in embodiment 4 is in a B-trunk private network.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail and completely with reference to the following specific embodiments of the present application and the accompanying drawings. It should be apparent that the described embodiments are only some of the embodiments of the present application, 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 application.
The technical solutions provided by the embodiments of the present application are described in detail below with reference to the accompanying drawings.
Example 1
Referring to fig. 1, a method for live broadcasting or on-demand video conference provided in embodiment 1 of the present invention includes the following steps:
s1, acquiring conference audio and video data; the audio and video data acquisition method comprises the following steps: converting the audio and video information into audio and video signals through an audio and video matrix; accessing the audio and video signals into an encoder; the encoder converts the audio and video signals into audio and video data; it should be noted that: the interface between the encoder and the multimedia scheduling server can be any self-defined interface, even the encoder and the multimedia scheduling server can be combined into a whole and become an internal interface;
s2, transmitting the audio and video data to a multimedia scheduling server; multiple encoders can be accessed to the same multimedia scheduling server and an appropriate transmission mode is selected to transmit audio and video data to the multimedia scheduling server (it is explained that each encoder corresponds to an audio and video matrix, and can be understood that each encoder corresponds to a video conference);
s3, the multimedia scheduling server pushes the audio and video data to a live broadcast interface of the client or pushes the audio and video data to an on-demand interface of the client in a list form; wherein: the method for pushing the audio and video data to the client live interface by the multimedia scheduling server comprises the following steps: the multimedia scheduling server selects a designated client; selecting a proper pushing method by the multimedia dispatching desk; and the multimedia dispatching desk pushes the audio and video data acquired by the multimedia dispatching server to a specified client. The method for acquiring the video conference list by the client on-demand interface comprises the following steps: the multimedia dispatching desk sets a video conference list which is authorized to be requested by a specific client, and the client selects a proper acquisition mode to acquire the video conference list from the multimedia dispatching server. The multimedia scheduling server pushing a certain path of audio and video data to a client live interface further comprises: all video live broadcast clients needing live broadcast of the conference can be grouped in advance in the multimedia scheduling server; and the multimedia scheduling server pushes the audio and video data to a corresponding grouping.
It should be noted that the transmission method includes: HTTP, HTTPS, SIP, ONVIF, RTSP, RTP/RTCP, TCP, UDP, GB/T28181 (for explanation: here is the communication protocol between the encoder and the multimedia scheduling server, generally one of these protocols); the acquisition mode comprises the following steps: SIP, HTTP, HTTPS, RTSP, TCP, and UDP. After the multimedia scheduling server obtains the audio and video of the video conference, how to send the video conference to each video conference live broadcast client through an IP network can be various methods and can be various proprietary protocols.
The specific implementation is as follows: please refer to fig. 2 and fig. 3, which illustrate the implementation manner of GB/T28181, where a multimedia scheduling server as an SIP server can interface multiple encoders (encoders as national standard devices) and multiple multimedia scheduling stations, and fig. 1 describes a flow in which a certain multimedia scheduling station pulls a real-time video, which is an encoder of a national standard device, to the multimedia scheduling station through a GB/T28181 real-time audio/video on demand flow, and then the scheduling station initiates a video push to a terminal, so that multiple live video clients can obtain a real-time video stream. When a large number of live video clients need to watch a video conference in real time, grouping is generally performed in advance in a multimedia dispatching server, so that a multimedia dispatching desk can inform the multimedia dispatching server to push videos to hundreds or thousands of live video clients only by a small amount of signaling. When the video is pushed, the multimedia scheduling server can establish SIP session with each video live broadcast client one by one.
Example 2
The method for live broadcasting or on-demand video conference provided by the embodiment 2 of the present invention is basically the same as that of the embodiment 1, and the difference is that, as shown in fig. 4, when a client has a B-TrunC private network, the specific implementation is as follows: aiming at a terminal under a B-Trunc private network, a multimedia dispatching desk simultaneously carries out SIP registration to a multimedia dispatching server and a B-Trunc T-CN in an SIP client mode, an SIP session is established between the multimedia dispatching desk and the multimedia dispatching server, and the multimedia dispatching desk acquires a media stream from the multimedia dispatching server. Then SIP conversation is established between the multimedia dispatching desk and the T-CN, and the media flow is from the multimedia dispatching desk to the T-CN and further from the B-Trunc T-CN to the video live broadcast client.
Example 3
The apparatus for a live or on-demand method of a video conference provided in embodiment 3 of the present invention, please refer to fig. 5, which includes: the system comprises an encoder 100, a multimedia dispatching server 200, a multimedia dispatching desk 300, a live video client 400 and an audio-video matrix 500; the encoder is electrically connected with the audio/video matrix 500 through the HDMI; the encoder, the multimedia dispatching server, the multimedia dispatching desk and the video live broadcasting client are connected through an IP network; when the audio/video matrix encoder is used, the input end of the encoder is connected with the audio/video matrix in modes of HDMI and the like. The encoder multimedia dispatching server, the multimedia dispatching desk and the video live broadcasting client are connected through an IP network. The encoder acquires video and audio bare data of the video conference from the audio and video matrix, and converts the video and audio bare data into RTP stream based on IP encapsulation or PS stream of the media surface of GB/T28181 (audio encapsulation needs extension coding). The multimedia dispatching server establishes a session (which can be in a GB/T28181, SIP, TCP or the like) with the encoder, and obtains the audio and video of the video conference. And the video is forwarded to a multimedia dispatching desk or a video live broadcast client through ways of SIP session and the like. The multimedia dispatching desk is client software, generally visual dispatching software on a PC (personal computer), and can also be visual dispatching software running on a flat panel. The multimedia dispatcher station serves as a SIP client and registers with a multimedia dispatch server (SIP server) and a B-Trunc core network (SIP server) at the same time. The multimedia dispatching desk can obtain the audio and video of the appointed video conference through the multimedia dispatching server. And a plurality of video live broadcast clients can be selected and pushed to the specified video live broadcast clients.
The live video client is an APP installed on a mobile terminal (which can be a public network terminal or a private network terminal such as B-Trunc). When the video conference is directly pushed to the terminal in a public network mode, the live broadcast client side directly obtains the audio and video of the video conference from the multimedia scheduling server. .
The overall media stream diagram in use of the present embodiment is shown in fig. 6.
Example 4
The device for a live or on-demand method of a video conference provided in embodiment 4 of the present invention, please refer to fig. 7, which includes: the system comprises an encoder 100, a multimedia dispatching server 200, a multimedia dispatching desk 300, a live video client 400, an audio and video matrix 500 and a B-trunk C600; the encoder is electrically connected with the audio/video matrix 500 through the HDMI; the encoder, the multimedia scheduling server, the multimedia scheduling platform and the video live broadcast client are connected through a B-trunk C600; when the audio/video matrix encoder is used, the input end of the encoder is connected with the audio/video matrix in modes of HDMI and the like. The encoder multimedia dispatching server, the multimedia dispatching desk and the video live broadcasting client are connected through an IP network. The encoder acquires video and audio bare data of the video conference from the audio and video matrix, and converts the video and audio bare data into RTP stream based on IP encapsulation or PS stream of the media surface of GB/T28181 (audio encapsulation needs extension coding). The multimedia dispatching server establishes a session (which can be in a GB/T28181, SIP, TCP or the like) with the encoder, and obtains the audio and video of the video conference. And the video is forwarded to a multimedia dispatching desk or a video live broadcast client through ways of SIP session and the like. The multimedia dispatching desk is client software, generally visual dispatching software on a PC (personal computer), and can also be visual dispatching software running on a flat panel. The multimedia dispatcher station serves as a SIP client and registers with a multimedia dispatch server (SIP server) and a B-Trunc core network (SIP server) at the same time. The multimedia dispatching desk can obtain the audio and video of the appointed video conference through the multimedia dispatching server. And a plurality of video live broadcast clients can be selected and pushed to the specified video live broadcast clients. When the B-Trunc private network is connected, the multimedia dispatching desk can select one or more B-Trunc groups to carry out video conference pushing through the B-Trunc core network, and after the video conference pushing is carried out, live broadcasting is carried out on all terminals corresponding to the Btsunc groups.
The overall media stream flow diagram in use of the present embodiment is shown in fig. 8.
It should also be noted that 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 an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element
The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (8)
1. A method for video conference live broadcasting or on demand is characterized by comprising the following steps:
the encoder, the multimedia scheduling server, the multimedia scheduling platform and the video live broadcast client are connected through an IP network; the multimedia dispatching desk is client software; the video live broadcast client is an APP installed on the mobile terminal;
the mobile terminal comprises a public network terminal and a B-Trunc private network terminal;
converting audio and video information of the video conference into audio and video signals through an audio and video matrix; accessing the audio and video signals into an encoder; the encoder converts the audio and video signals into audio and video data; transmitting the audio and video data to a multimedia scheduling server;
the multimedia dispatching desk registers to a multimedia dispatching server and a B-trunk core network simultaneously in an SIP client mode, acquires audio and video of a specified video conference through the multimedia dispatching server, selects a plurality of video live broadcasting clients and pushes the selected video live broadcasting clients to the specified video live broadcasting clients;
when the video conference is directly pushed to the terminal in a public network mode, the client side directly obtains the audio and video of the video conference from the multimedia scheduling server; when the video is pushed to the group in a B-trunC private network mode, the client acquires the audio and video of the video conference through a shared downlink channel; and the multimedia dispatching desk selects the B-Trunc group to carry out video conference pushing through the B-Trunc core network, and the video conference carries out live broadcasting on all terminals corresponding to the B-Trunc group.
2. The method of claim 1, wherein transmitting audio/video data to a multimedia scheduling server comprises: and a plurality of encoders are accessed to the same multimedia scheduling server, and an appropriate transmission mode is selected to transmit the audio and video data to the multimedia scheduling server.
3. The method of claim 1, wherein the step of pushing the audio and video data to the client live interface by the multimedia scheduling server comprises the steps of: selecting a designated client by the multimedia dispatching desk; selecting a proper pushing method by the multimedia dispatching desk; and the multimedia dispatching desk pushes the audio and video data acquired by the multimedia dispatching server to a specified client.
4. The method of claim 1, wherein the step of acquiring the video conference list by the client-side on-demand interface comprises the steps of: the multimedia dispatching desk sets a video conference list which is authorized to be requested by a specific client, and the client selects a proper acquisition mode to acquire the video conference list from the multimedia dispatching server.
5. The method of claim 2, wherein the step of the multimedia scheduling server pushing the audio and video data to the client live interface further comprises: all video live broadcast clients needing live broadcast of the conference are grouped in advance in a multimedia scheduling server; and the multimedia scheduling server pushes the audio and video data to a corresponding grouping.
6. The method of claim 2, wherein the transmission mode comprises: HTTP, HTTPS, SIP, ONVIF, RTSP, RTP/RTCP, TCP, UDP, and GB/T28181.
7. The live or on-demand method for video conference according to claim 3, wherein the manner of obtaining audio and video data comprises: SIP, HTTP, HTTPS, RTSP, TCP, and UDP.
8. A video conference live or on-demand device for implementing the method of any one of claims 1 to 7, comprising: the system comprises an encoder, a multimedia scheduling server, a multimedia scheduling platform, a live video client and an audio-video matrix; the encoder is electrically connected with the audio and video matrix through the HDMI; the encoder, the multimedia dispatching server, the multimedia dispatching desk and the video live broadcasting client are connected through an IP network; the multimedia dispatching desk is client software; the video live broadcast client is an APP installed on the mobile terminal;
the multimedia scheduling server pushes the audio and video data to a client on-demand interface in a list form;
the multimedia dispatching desk registers to the multimedia dispatching server and the B-Trunc core network at the same time, acquires the audio and video of the appointed video conference through the multimedia dispatching server, selects a plurality of video live broadcast clients and pushes the selected video live broadcast clients to the appointed video live broadcast clients;
and if the client side is provided with the B-Trunc private network, the multimedia scheduling server pushes the audio and video data to one or more B-Trunc groups and pushes the audio and video data to the client side through the B-Trunc private network.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101917415A (en) * | 2010-07-30 | 2010-12-15 | 北京华夏电通科技有限公司 | Digital court system for remote court trial |
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| CN102281460A (en) * | 2011-08-18 | 2011-12-14 | 宋健 | Network television live broadcasting method and system implemented on basis of video conference |
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