CN111556273A - Method for controlling recording code stream in video conference recording and broadcasting - Google Patents
Method for controlling recording code stream in video conference recording and broadcasting Download PDFInfo
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- CN111556273A CN111556273A CN202010137508.1A CN202010137508A CN111556273A CN 111556273 A CN111556273 A CN 111556273A CN 202010137508 A CN202010137508 A CN 202010137508A CN 111556273 A CN111556273 A CN 111556273A
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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
- H04N7/155—Conference systems involving storage of or access to video conference sessions
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V20/00—Scenes; Scene-specific elements
- G06V20/40—Scenes; Scene-specific elements in video content
- G06V20/41—Higher-level, semantic clustering, classification or understanding of video scenes, e.g. detection, labelling or Markovian modelling of sport events or news items
- G06V20/42—Higher-level, semantic clustering, classification or understanding of video scenes, e.g. detection, labelling or Markovian modelling of sport events or news items of sport video content
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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
- H04N21/21—Server components or server architectures
- H04N21/218—Source of audio or video content, e.g. local disk arrays
- H04N21/2187—Live feed
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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
- H04N21/433—Content storage operation, e.g. storage operation in response to a pause request, caching operations
- H04N21/4334—Recording operations
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
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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
- H04N7/152—Multipoint control units therefor
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- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
The invention discloses a method and a device for controlling and recording a code stream in video conference recording, wherein the auxiliary stream is subjected to image recognition through the video conference recording, a recording judgment result is obtained, and if the auxiliary stream data is not received at present, the received main stream video is recorded and played. And if the auxiliary stream data is currently received and the judgment result meets the auxiliary stream recording condition, recording the auxiliary stream. If the current auxiliary stream is being recorded and the judgment result meets the condition of stopping recording the auxiliary stream, the recording and the broadcasting stop recording the auxiliary stream, and the current recorded video is switched to be the main stream video. The method and the device achieve the effect of switching the live broadcast and recorded data of the video conference into the main stream and the auxiliary stream by determining the current recorded and live broadcast video code stream according to the motion result of the auxiliary stream.
Description
Technical Field
Relates to the field of video conferences. In particular to a method for controlling and recording code streams in recording and broadcasting of a video conference.
Background
Video conferencing has been widely used in various industries, such as government conferences, enterprise conferences, remote consultation, etc. The video conference recording and broadcasting can record and broadcast the video conference organized by the multipoint control unit MCU.
The current video conference can send two paths of images of a main stream and an auxiliary stream to a far-end meeting place at the same time. The main stream is a video picture and the auxiliary stream is a computer signal. Whether to send the auxiliary stream is determined by the video conference control unit MCU.
The current video conference recording and playing device is generally regarded as a 1-channel video conference terminal which is added into an ongoing video conference organized by an MCU, and records main stream video and auxiliary stream video pictures sent by the MCU.
Because the time of transmitting the auxiliary stream is not continuous, there are the following methods commonly used for recording and broadcasting: the main stream records 1 video file, the auxiliary stream records 1 or more video files, and the video files are integrated during playing. Recording 1 video file of the main stream and the auxiliary stream, and recording the main stream video when the auxiliary stream is not received; when the auxiliary stream is received, recording the auxiliary stream, the main stream double-picture or the picture-in-picture.
Disclosure of Invention
The invention provides a method and a device for controlling the recording and the recording of code streams in video conference recording and broadcasting. The video conference recording and playing, the live video content is the main stream, the auxiliary stream is switched according to the strategy, the recorded video is a single video file, and the MP4 universal player can be supported to play.
The scheme provided by the invention is as follows:
a method for controlling and recording code stream in video conference recording and broadcasting is characterized in that in a double-current video conference with an MCU opened, the video conference recording and broadcasting is added into the conference in a mode of a video conference terminal, a main video stream and an auxiliary stream channel are established between the video conference recording and broadcasting and the MCU, the MCU sends a main stream video to the video conference terminal and the video conference recording and broadcasting, and actively controls the sending of the auxiliary stream to the terminal and the recording and broadcasting and the ending of the auxiliary stream.
The method for controlling the recorded code stream, provided by the invention, comprises the step of recording and broadcasting the live video and recording and receiving the main video transmitted by the MCU when the auxiliary video transmitted by the MCU is not received by the recording and broadcasting. When the recorded broadcast receives the auxiliary stream video sent by the MCU, whether the continuous n-second variable quantity of the auxiliary stream data exceeds a preset value is analyzed by adopting an image processing method, and the recorded broadcast and recorded code stream of the video conference is switched to the received auxiliary stream video.
The control method of the invention, wherein the video conference recording and broadcasting carries out image recognition on the received auxiliary stream video frame, and the auxiliary stream judgment module carries out image recognition and analysis on the auxiliary stream frame and decides whether to broadcast and record the auxiliary stream. And determining to record or not record the auxiliary stream according to the judgment result.
The invention also provides a video conference recording and broadcasting device, wherein the recording and broadcasting device comprises:
and the receiving unit establishes a main stream and auxiliary stream connecting channel with the MCU. And the main stream video and the auxiliary stream video are sent by the MCU. The auxiliary flow control channel may be an H239 channel established by the h.323 mode and the MCU, or a BFCP auxiliary flow control channel established by the SIP mode and the MCU.
And the auxiliary stream judging unit is used for carrying out image recognition on the received auxiliary stream video frames sent by the MCU, and analyzing and determining whether the received auxiliary stream is live broadcast or recorded currently. And if the auxiliary stream is recorded currently, analyzing and determining whether to finish recording the auxiliary stream video which is currently sent.
And the recording unit determines that the currently recorded content is the main stream video or is switched to the auxiliary stream video according to the judgment result made by the auxiliary stream judgment unit.
In the embodiment of the invention, the video conference recording and broadcasting can perform image analysis on the received auxiliary stream video in the participating video conference, judge whether the conditions of live broadcasting and auxiliary stream recording are met or not through processing, and perform the operation of switching the live broadcasting and the auxiliary stream recording according to the judgment result. When the auxiliary stream is live broadcast and recorded, the video conference recorded broadcast carries out decoding analysis on the received auxiliary stream video, meets the conditions of stopping live broadcast and recording, and switches the live broadcast and recorded code stream into the received main stream video.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments of the present invention will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic flowchart of a method for controlling recording of a code stream in a video conference in an embodiment of the present invention.
Fig. 2 is a schematic diagram of a recorded broadcast participating video conference network.
Fig. 3 is a flowchart of controlling recording of an auxiliary stream in recording and playing of a video conference according to an embodiment of the present invention.
Fig. 4 is a block diagram of a video conference recording according to an embodiment of the present invention.
Fig. 5 is a schematic diagram of a secondary flow determination unit according to an embodiment of the present invention.
Detailed description of the preferred embodiments
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 method for controlling the recording and the recording of the code stream for the recording and the playing of the video conference, provided by the embodiment of the invention, can be applied to scenes such as video conferences under an H.323 protocol and an SIP protocol.
The method for controlling and recording the code stream in the recording and playing of the video conference provided by the embodiment of the invention is described in detail below with reference to fig. 1 to fig. 3, wherein the terminal in the embodiment may be a video conference terminal, video conference terminal software, or other video conference terminals. The above terminals are merely examples, not exhaustive, and include but are not limited to the above terminals.
A method for controlling and recording code stream in video conference recording and broadcasting is a flow diagram. The method for controlling the recording and the recording of the code stream for the recording and the broadcasting of the video conference in the embodiment of the invention comprises the following steps:
and carrying out image processing on the auxiliary stream received by the video conference recording and broadcasting to obtain a recording code stream control result.
And establishing a main stream and an auxiliary stream channel by the video conference recording and broadcasting and video conference equipment, and judging whether auxiliary stream data is received by the video conference recording and broadcasting. When the auxiliary stream channel of the video conference recording and broadcasting does not receive the auxiliary stream data, the video conference recording and broadcasting records the received main stream video; when the video conference recording and broadcasting receives the auxiliary stream data sent by the video conference equipment, the video conference recording and broadcasting adopts an image processing method to judge whether the received auxiliary stream variable is larger than a preset value. The received auxiliary flow variation is not greater than a preset value, and the main flow data received by recording and broadcasting are continuously recorded; and when the received auxiliary stream variable is larger than a preset value, the recorded and broadcast recorded data is switched from the main stream video which is being recorded into the received auxiliary stream video data. When the video conference recording and broadcasting are recording the auxiliary stream data, the video conference recording and broadcasting continue to judge whether the received auxiliary stream variable is less than the preset value for n seconds continuously and less than the preset value for n seconds continuously by using the image processing method, the video stream being recorded is switched into the main stream video received by recording and broadcasting, and the auxiliary stream video received by recording and broadcasting continues when the n seconds non-continuously is less than the preset value.
The video conference equipment can be a video conference terminal and can be a video conference control unit MCU. When the video conference recorded broadcast receives the auxiliary stream video sent by the terminal or the MCU, the video conference recorded broadcast captures a video frame for judging whether the auxiliary stream moves.
And when the recorded broadcast receives an auxiliary stream video frame for judging whether the auxiliary stream moves, the recorded broadcast decodes and identifies the image of the auxiliary stream frame to be judged to obtain a judgment result of whether the auxiliary stream moves.
If the recorded and broadcast currently receives the auxiliary stream data and the judgment result is that the auxiliary stream recording condition is met, the recorded and broadcast video stream is switched from the received main stream video single picture to the recorded auxiliary stream single picture.
Preferably, the video conference in which the video conference recording and playing participate may be a video conference started by a plurality of video conference terminals summoned by a video conference multipoint control unit MCU. Or a local conference started by the video conference terminal and the video conference recording and broadcasting connection. See FIG. 2
And recording the auxiliary stream data in the video conference recording and broadcasting in the current video conference, wherein the auxiliary stream recording result obtained by the video conference recording and broadcasting is the recorded auxiliary stream, and the received auxiliary stream data is continuously recorded by the video conference recording and broadcasting. And switching the live broadcast and recorded code stream into the default main stream video by recording and broadcasting until the auxiliary stream recording result obtained by the video conference recording and broadcasting is that the recording of the auxiliary stream is stopped.
If the current recording and broadcasting server is recording the auxiliary stream data, and the video conference recording and broadcasting obtains the auxiliary stream recording result that the recording of the auxiliary stream is stopped, the recording and broadcasting switches the live broadcasting and recording contents into the default main stream video picture.
And the recording of the auxiliary stream is stopped by the video conference recording and broadcasting, namely the recorded and broadcast live data of the video conference is not auxiliary stream data any more, and the recorded and broadcast data is switched into default received main stream data.
As shown in fig. 3, it is preferable that the flow of the method for controlling recording of the auxiliary stream by recording and playing of the video conference is as follows:
recording and broadcasting participate in the video conference, and a main stream channel and an auxiliary stream channel are established with video conference equipment.
Preferably, an h.329 channel is established simultaneously when connected using the H323 protocol. Therefore, a plurality of media channels can be used between the video conference recording and playing and the video conference equipment, namely, a plurality of video logic channels can be simultaneously established between the video conference recording and playing and the MCU so as to simultaneously transmit the main stream video and the auxiliary stream video (such as slides, browser screens and the like).
Preferably, when the session description protocol SDP is used for connection, media stream capabilities supported by both parties are interacted between the video conference recording and the MCU through the SIP protocol. The dual flow of SIP is controlled by SIP and BFCP protocols.
And judging whether the auxiliary stream data is received or not by recording and broadcasting the video conference, and recording and broadcasting the received main code stream when the auxiliary stream data is not received.
And judging whether the auxiliary stream data is received or not by the video conference recording and broadcasting, decoding the received auxiliary stream by the video conference recording and broadcasting when the auxiliary stream data is received, and carrying out image processing on the decoded data to obtain a recording auxiliary stream result.
Preferably, the main stream and the auxiliary stream channel are established between the video conference recording and broadcasting and the MCU, a plurality of video conference terminals participating in the conference are provided, and when one of the terminals always sends auxiliary stream data to the MCU. The terminal can be any video conference terminal participating in the conference, and opens the auxiliary stream channel and sends data. In a specific application, when the MCU sends auxiliary stream data to all the terminals, the video conference recorded broadcast can capture the auxiliary stream data to judge whether the auxiliary stream moves.
Preferably, when the video conference recording and broadcasting receives an auxiliary stream video frame indicating whether the auxiliary stream to be determined moves, the video conference recording and broadcasting decodes the auxiliary stream frame to be determined, performs image recognition on the decoded data, and obtains a result indicating whether the auxiliary stream is recorded. Further, a motion area in the image is extracted from the received auxiliary stream video frame to be processed. And finally, if the area of the image motion region is larger than a preset threshold value, the motion is considered to be detected and the region is taken as a motion region.
And comparing the motion area with a preset threshold value, wherein the motion area is larger than the preset threshold value, and the recording and broadcasting judgment result is auxiliary stream motion. And the recording and broadcasting modifies the live broadcast and the recorded video from the default main stream video into the received motion auxiliary stream data.
And comparing the motion area with a preset threshold value, wherein if the motion area is smaller than the preset threshold value, the recorded broadcast judgment result is no motion. And continuing to decode the received auxiliary stream data, and performing image recognition on the decoded data until the recording and broadcasting judgment result is motion and the judgment result is the recorded auxiliary stream. And switching the recorded and broadcast live broadcast and recording the code stream into auxiliary stream data.
If the recording and broadcasting do not record the auxiliary stream data, when the recording and broadcasting result is that the auxiliary stream is recorded, the recording and broadcasting live broadcast and the recording auxiliary stream data.
Preferably, the recording and broadcasting live broadcast and the recording of the auxiliary stream data, and other conferencing terminals include video conference terminals, video conference terminal software and other terminals, and receive the auxiliary stream data sent by the MCU.
And when the recording and playing judgment result is that the auxiliary stream is recorded, the auxiliary stream data is live broadcast and recorded. And comparing the image analysis motion area with a preset threshold value, wherein if the image analysis motion area is larger than the preset threshold value, the recorded broadcast judgment result is motion. Therefore, the judgment result is that the auxiliary stream is recorded, and the recording and broadcasting continue to live broadcast and record the auxiliary stream data. And stopping recording the auxiliary stream until the recording result is judged to be the recording stop result.
And the recording and broadcasting result of the auxiliary stream is judged to be the recording stopping auxiliary stream, and the recording stopping and the live broadcasting of the auxiliary stream data are not immediately executed in the recording and broadcasting. And the recording and broadcasting starts to time for n seconds from the first judgment result of stopping recording the auxiliary stream, and the continuous n-second image analysis motion area is compared with a preset threshold value and is smaller than the preset threshold value. And timing n seconds, wherein n is a preset threshold value. And the recording result is judged to be that the recording of the auxiliary stream is stopped, and the recording and broadcasting are switched to live broadcasting, and the recorded data is the auxiliary stream data.
As shown in fig. 4-5, a video conference recording that controls recording of a secondary stream control in a recording embodiment of the present invention includes the following units:
and the receiving unit is used for receiving the main stream and the auxiliary stream data which are sent by the video conference equipment through the main stream channel and the auxiliary stream channel. The auxiliary flow channel can be 239 channel of H.323 protocol, and can also be auxiliary flow channel of BFCP auxiliary flow control under SIP protocol.
Preferably, the main stream and the auxiliary stream connecting channel are established between the video conference recording and playing and the video conference equipment. The video conference equipment can be a video conference terminal and can be a video conference multipoint control unit MCU. And after the video conference recording and broadcasting participates in the conference and connection is established, the main stream data is received by default. The video conference records the received mainstream data by default. When the auxiliary stream data is received in the auxiliary stream channel, the video conference recording and broadcasting captures a video frame for judging whether the auxiliary stream moves.
And the judging unit is used for splicing and decoding the received auxiliary stream by recording and broadcasting, carrying out image identification on the decoded data and obtaining the result of whether the auxiliary stream is recorded or not.
The data acquisition unit is used for splicing and decoding the auxiliary stream frame to be judged when the recorded broadcast receives the auxiliary stream video frame to be judged whether the auxiliary stream moves, and performing image identification on the obtained data to obtain a judgment result whether the auxiliary stream moves; a first data processing unit which performs interframe difference processing on the decoded data and distinguishes a change area;
the comparison unit is used for comparing the change area with a preset value, and if the change area is larger than the preset value, the recording and broadcasting recording result is a recording auxiliary stream; and if the value is smaller than the preset value, returning to the first data processing module.
Preferably, the recording and playing records the auxiliary stream data, and if the recording and playing of the current video conference is recording the auxiliary stream data, the recording and playing obtains the recording judgment result that the recording and playing is recording the auxiliary stream, and the recording and playing continues to record the auxiliary stream data. And stopping recording the auxiliary stream data and switching the recorded video into the main stream data by the recorded and broadcast execution until the recorded and broadcast acquisition judgment result indicates that the recording of the auxiliary stream is stopped.
If the auxiliary stream data is being recorded, the recording and broadcasting stop recording and the auxiliary stream recording are stopped when the recording and broadcasting judgment result is that the recording and broadcasting stop and the sending stop condition is reached. And the recording and broadcasting stop recording the auxiliary stream, namely the recording and broadcasting does not record the auxiliary stream data any more, and the recorded data is switched into the recorded main stream data.
And the recording unit is used for recording and broadcasting and determining the current 1-path live broadcast and recorded video as a main stream video or an auxiliary stream video according to the auxiliary stream recording result of the judging unit. The recording unit comprises a data processing unit, and the data processing unit is used for carrying out interframe difference processing on the decoded data and distinguishing a change area; the comparison unit compares the change area with the preset value, and if the continuous n seconds are less than the preset value, the recording and broadcasting execution stops recording the auxiliary stream; if the value is larger than the preset value, returning to the data processing unit.
And when the recording and broadcasting judgment result is that the auxiliary stream is recorded, the recording and broadcasting recording unit executes the operation of recording the auxiliary stream. If the received auxiliary stream data is being recorded by the recording and broadcasting of the current video conference, and the recording and broadcasting obtained judgment result is the recording auxiliary stream, the recording and broadcasting recording unit continues to record the auxiliary stream data. If the current video conference recording and broadcasting is recording and receiving the auxiliary stream data, and the recording and broadcasting obtaining judgment result is that the recording and broadcasting of the auxiliary stream is stopped, the recording and broadcasting recording unit executes the recording of the auxiliary stream. And the recording and broadcasting stop recording the auxiliary stream, namely the recording and broadcasting does not record the auxiliary stream data any more, and the recorded video is switched into the received main stream data.
Claims (6)
1. A method for controlling and recording code streams in video conference recording and broadcasting is characterized by comprising the following steps:
s1, carrying out image recognition on the received auxiliary stream video by video conference recording and broadcasting, and determining to record the content of the code stream;
s2, if the video conference recording and broadcasting does not receive the auxiliary stream data sent by the video conference terminal equipment at present, the video conference recording and broadcasting records the received main stream video;
s3, if the video conference recorded broadcast currently receives the moving auxiliary stream data sent by the video conference terminal equipment, the video conference recorded broadcast records the received auxiliary stream video;
and S4, if the auxiliary stream data is recorded currently, when the received auxiliary stream data is prohibited from moving for n seconds continuously, recording and recording the received main stream video in the video conference.
2. The method according to claim 1, wherein the step S3 includes:
s31, the recorded broadcast judges the change area and the change quantity of the received auxiliary stream data by using an image processing method;
s32, comparing the auxiliary stream variable quantity with a preset value, and if the continuous N seconds are more than the preset value, switching the recorded and broadcast recording code stream into auxiliary stream video recording; otherwise, the main stream video is continuously recorded.
3. The method according to claim 1, wherein the step S4 includes:
and if the continuous n seconds are less than the preset value, the recorded and broadcast recording code stream is switched into the main stream video.
4. A video conference recording and playing device with a method for controlling the recording of code stream is characterized in that,
the auxiliary stream judging unit is used for carrying out image recognition on the auxiliary stream by the video conference recording and broadcasting device to obtain a recording judging result;
a recording unit for recording and playing the currently received main stream video if the auxiliary stream is not currently received; and if the auxiliary stream is currently received and the recording judgment result meets the condition of recording the auxiliary stream, changing the recorded and broadcast recording code stream into auxiliary stream recording.
5. The system of claim 4, further comprising: and the receiving unit is used for establishing the main stream and auxiliary stream channel between the recording and broadcasting device and the terminal and receiving the main stream and auxiliary stream video data sent by the video conference terminal.
6. The system according to claim 4, wherein the determining unit comprises a data analyzing unit, and the video conference recording and broadcasting performs image processing on the received auxiliary stream to obtain an auxiliary stream change area change value; the comparison unit is used for comparing the variation value of the variation area with a preset value; if the video conference recording content is larger than the preset value, changing the recording content into auxiliary stream recording; and if the continuous n seconds are less than the preset value, recording the received main stream video.
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| ALEXEY LOSHKAREV: "Parameter definition of the camera settings and of recognizable object in the system of automatic video recording", 2017 4TH INTERNATIONAL SCIENTIFIC-PRACTICAL CONFERENCE PROBLEMS OF INFOCOMMUNICATIONS. SCIENCE AND TECHNOLOGY * |
| 张元龙: "高清视频会议系统在辽宁气象服务中的应用", 高清视频会议系统 * |
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