CN116136785A - Method, device, electronic device and storage medium for directional screen capture of multi-person projection - Google Patents

Abstract

The embodiment of the invention discloses a directional screen capture method, device, electronic equipment and storage medium for multi-person screen projection. The method is used for a screen projection server, which includes: receiving a screen projection video stream sent by at least one client terminal during the cooperative operation of multiple client terminals; sending a thumbnail of the screen projection video stream to each of the clients The terminal displays, the thumbnails are displayed in the same information block of the collaborative interaction interface, and a screenshot control is correspondingly displayed in each of the thumbnails; receiving a screenshot instruction generated by triggering the screenshot control on the collaborative interaction interface, and obtaining the The thumbnail identification corresponding to the screenshot command; according to the thumbnail identification, the frame image is intercepted from the corresponding screen projection video stream, and the frame image is sent to the requesting terminal for display, and the requesting terminal is the client terminal that sends the screenshot command . This solution realizes the user's directional and autonomous screen capture of multi-channel projection screens on the client terminal.

Description

Method, device, electronic device and storage medium for directional screen capture of multi-person projection

technical field

Embodiments of the present invention relate to the field of interactive technologies, and in particular, relate to a directional screen capture method, device, electronic device and storage medium for multi-person screen projection.

Background technique

In a meeting scene under the background of information technology, many people often discuss around the focus information presented by the meeting equipment. During this discussion, there may be multiple people casting screens at the same time, and then switch the currently displayed screen casting screen according to the progress of the meeting.

During the process of multi-person screen projection, the people participating in the meeting discussion may have the need to save a certain screen projection screen. The existing technical solutions can only take screenshots of the currently displayed screen through the operation of the screen projection display device. It is not possible to take self-directed screenshots of screen data.

Contents of the invention

The invention provides a directional screen capture method, device, electronic equipment and storage medium for multi-person projection to solve the technical problem that existing users cannot perform directional screen capture of screen data independently.

In the first aspect, the embodiment of the present invention provides a directional screen capture method for multi-person screen projection, which is used for the screen projection server, including:

Receive the screen-casting video stream sent by at least one client terminal during the collaborative operation of multiple client terminals;

Sending the thumbnail of the screen-casting video stream to each of the client terminals for display, the thumbnail is displayed in the same information block of the collaborative interactive interface, and each of the thumbnails is correspondingly displayed with a screenshot control;

receiving a screenshot instruction generated by triggering the screenshot control on the collaborative interaction interface, and acquiring a thumbnail identifier corresponding to the screenshot instruction;

Capture a frame image from the corresponding screen-casting video stream according to the thumbnail identifier, and send the frame image to a requesting terminal for display, and the requesting terminal is the client terminal that sends the screenshot command.

In the second aspect, the embodiment of the present invention also provides a directional screen capture device for multi-person screen projection, which is used for the screen projection server, including:

The video stream receiving unit is used to receive the projection video stream sent by at least one client terminal during the collaborative operation of multiple client terminals;

A thumbnail image sending unit, configured to send the thumbnail image of the projected screen video stream to each of the client terminals for display, the thumbnail images are displayed in the same information block of the collaborative interaction interface, and each of the thumbnail images is correspondingly displayed There is a screenshot control;

A screenshot instruction receiving unit, configured to receive a screenshot instruction generated by triggering the screenshot control on the collaborative interaction interface, and obtain a thumbnail identifier corresponding to the screenshot instruction;

A screenshot sending unit, configured to intercept a frame image from the corresponding screen-casting video stream according to the thumbnail identifier, and send the frame image to a requesting terminal for display, and the requesting terminal is the client terminal sending the screenshot instruction.

In a third aspect, an embodiment of the present invention also provides an electronic device, including:

one or more processors;

memory for storing one or more programs;

When the one or more programs are executed by the one or more processors, the electronic device implements the directional screen capture method for multi-person screen projection as described in the first aspect.

In a fourth aspect, the embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, and when the program is executed by a processor, the method for directional screen capture by multi-person projection as described in the first aspect is implemented.

The above directional screen capture method, device, electronic device and storage medium for multi-person screen projection, the method is used on the screen projection server, including: receiving the screen projection video stream sent by at least one client terminal during the collaborative operation of multiple client terminals; Send the thumbnail of the screen-casting video stream to each of the client terminals for display, the thumbnail is displayed in the same information block of the collaborative interaction interface, and each of the thumbnails is correspondingly displayed with a screenshot control; The collaborative interaction interface triggers the screenshot command generated by the screenshot control, and obtains the thumbnail identifier corresponding to the screenshot instruction; intercepts the frame image from the corresponding screen-casting video stream according to the thumbnail identifier, and sends the frame image to the requesting The terminal displays, and the requesting terminal is the client terminal that sends the screenshot instruction. The screen-casting server sends the screen-casting video stream to each client terminal for preview display in the form of a thumbnail, the user sends a screenshot command through the screenshot control in the thumbnail, and the screen-casting server captures the corresponding frame image according to the screenshot command and sends it To the corresponding client terminal, it realizes the directional and autonomous screen capture of the multi-channel projection screen by the user on the client terminal.

Description of drawings

Fig. 1 is a method flow chart of a directional screen capture method for multi-person projection provided by an embodiment of the present invention;

Figure 2 is a schematic diagram of the interface of the interactive panel;

FIG. 3 is a schematic diagram of the architecture of an interactive tablet and a client terminal during collaborative interaction according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of clicking a screenshot control in a thumbnail;

FIG. 5 is a schematic diagram of clicking a thumbnail on the collaborative interaction interface;

FIG. 6 is a schematic diagram of clicking the screenshot control in the preview image;

FIG. 7 is a schematic structural diagram of a directional screen capture device for multi-person projection according to an embodiment of the present invention;

FIG. 8 is a schematic structural diagram of an electronic device provided by an embodiment of the present invention.

Detailed ways

The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are used to explain the present invention rather than limit the present invention. In addition, it should be noted that, for the convenience of description, only some structures related to the present invention are shown in the drawings but not all structures.

It should be noted that due to space limitations, this application description does not list all optional implementation modes. After reading this application description, those skilled in the art should be able to imagine that as long as the technical features do not contradict each other, then any of the technical features Any combination can constitute an optional embodiment.

Each embodiment will be described in detail below.

Fig. 1 is a method flowchart of a directional screen capture method for multi-person projection provided by an embodiment of the present invention. As shown in the figure, the directional screen capture method for multi-person projection includes:

Step S110: Receive the screen-casting video stream sent by at least one client terminal during the coordinated operation of multiple client terminals.

In conferences, teaching, discussions, brainstorming and other multi-person interaction scenarios, the transmission of information between multiple participants has been achieved through speech, vision and hearing for a long period of time. This kind of information transmission can give participants a good Communication experience, but the recording of information in the communication process relies on the participants to record according to their personal habits and abilities, and the actual information transmitted may be lost.

With the development of information technology, there are more means for information display and information recording in the multi-person interaction scene, especially the multi-person interaction based on the interactive tablet. Each participant can concentrate the content to be displayed on the interactive tablet. Display, and receive and save various information in the process of collaborative communication on the interactive tablet.

The interactive panel mentioned in this solution can be an integrated device that controls the content displayed on the display panel and realizes human-computer interaction through touch technology. It integrates projectors, electronic whiteboards, curtains, audio, TV One or more functions such as machine and video conferencing terminal.

Generally speaking, as shown in FIG. 2 , the interactive panel 11 includes at least one display screen 12 . For example, the interactive panel 11 is configured with a display screen 12 with a touch function, and the display screen 12 may be a capacitive screen, a resistive screen or an electromagnetic screen. In this embodiment, further, the user can realize the touch operation by touching the display screen 12 with a finger or a stylus. Correspondingly, the interactive panel 12 detects the touch position and responds according to the touch position to realize touch control function. Typically, the interactive tablet 11 is installed with at least one operating system, wherein the operating system includes but not limited to Android system, Linux system and Windows system.

The interactive tablet is an interactive device mainly used to support multi-person communication scenarios, and the software in it is mainly used to realize the functional requirements in multi-person communication scenarios. For example, the interactive tablet can install at least one application program with a document presentation function, wherein the application program can be an application program built in the operating system; meanwhile, an application program downloaded from a third-party device or server is also installed. Optionally, in addition to the basic function of displaying the edited content, the program with the presentation function also has other editing functions during the presentation process, such as inserting tables, inserting pictures, illustration graphics, drawing tables, drawing graphics, etc. In order to realize the real-time display of user information input and input content in the information display process, and further improve the information display and interaction effect in the document presentation process. For example, the interactive tablet can be installed with at least one application program with a whiteboard function, based on which the user can realize real-time writing, recording, modification and storage under the scenario of multi-person collaboration and communication.

In this solution, in order to further improve the convenience of file transfer in multi-person communication scenarios, an application program can be installed on the interactive tablet to receive and display the projected screen, thereby using the architecture shown in Figure 3 to support multi-person communication The data transmission in the scene, that is, one or more participants in the multi-person communication connects the client terminal to the interactive tablet, and the data basis for all the operations of the participants to complete the collaborative interaction on the client terminal is the collaboration platform. That is, the client terminal used by each participant no longer only performs data transmission with the interactive tablet 11, and the interactive tablet 11 is no longer the only data collection point in the multi-person communication scenario. While retaining the necessary connection with the interactive tablet 11, each client terminal also needs a data connection with the collaboration platform, so that the operation and corresponding data of each client terminal in the multi-person communication process are fully recorded on the collaboration platform and management, the collaboration platform is built on the server. The collaboration platform can be understood as a platform for background management of all operations and corresponding data in the process of collaboration interaction, and the application interface of collaboration interaction can be understood as the interface where the data in the background management platform is used for user interaction on the client terminal. In the specific scenario shown in Figure 3, the client terminal can be a personal computer 21 or a mobile terminal 22, and a single participant can only connect to the personal computer 21 or the mobile terminal 22, or can connect to the personal computer 21 and the mobile terminal 11 at the same time . During the interaction process, the participant sends the content file to be displayed on the interactive panel 11 to the interactive panel 11, or directly displays it on the client terminal and projects it to the interactive panel 11 for display. With the support of this architecture, multi-person communication is no longer just focused on the communication of the interactive tablet 11, but all participants operate on their respective client terminals to achieve better communication effects. The multi-person communication process is also a collaborative interaction the process of.

As shown in Figure 4, the participants perform operations on the client terminal to realize collaborative interaction, and the collaborative interaction specifically includes all operations of information transmission between the participant and the interactive tablet, other client terminals, and itself in the multi-person communication scenario. During the collaborative interaction process, all file or data transmission and reception with the interactive tablet and other participants are completed on an application interface 30 , which is the application interface 30 for collaborative interaction. In this application interface, operations such as file transfer, file reception, screen projection sending, video initiation, video connection, whiteboard and other operations during multi-person communication can be realized, as well as follow-up operations of multi-person communication such as data summary and display.

In collaborative interaction, the user basis for all data generation is a group, a group includes multiple user IDs, each user ID corresponds to a participant, and a user ID can be added to different groups. All groups joined by the user ID can be displayed on the collaborative interaction application interface corresponding to the user ID, and receiving the first activation operation is an operation of confirming which group related data is currently displayed. The information of the group is stored in a server dedicated to provide data storage related to collaborative interaction. The server also stores all associated data generated by the group based on collaborative interaction, and is used to provide data transmission services between various client terminals.

The screen projection of the client terminal is an important part of the data transmission service. In this solution, when screenshots are taken in the process of multi-person projection, the screen projection video stream sent by the client terminal is summarized on different screen projection servers according to different connection methods. deal with. For example, in one mode, the screen projection server is an interactive flat panel, and the client terminal and the interactive flat panel are connected through the same local area network. The client terminal sends the screen projection video stream to the interactive flat panel through the local area network, and the interactive flat panel also sends the video stream to the client terminal through the local area network. Data, the data in the entire multi-person collaboration process is sent from the interactive tablet to the collaboration platform located on the server for unified storage and management. In another example, the screen projection server is a server, and the client terminal is connected to the server through a wide area network. The client terminal sends the screen projection video stream to the server through the wide area network, and the server also sends the video stream to the client terminal through the wide area network. To send data, the server also sends the data currently displayed on the screen to the interactive tablet through the WAN, and receives the data generated on the interactive tablet during the multi-person collaboration process. The data in the entire multi-person collaboration process is stored and managed by the server in a unified manner.

Step S120: Send the thumbnail of the screen-casting video stream to each of the client terminals for display, the thumbnail is displayed in the same information block of the collaborative interaction interface, and each thumbnail is correspondingly displayed with a screenshot control.

The collaborative interaction of the client terminal is realized through the collaborative interactive interface. Participants in the multi-person collaborative process are organized in groups. Each group corresponds to a group record interface. In the corresponding group recording interface, the data generated by each group is displayed in time series in the form of information blocks in the group recording interface, and one data is displayed in each information block. As shown in Figure 4, the relevant basic information of the XXX project communication group is displayed in the group record interface 33, such as the group theme, the latest modification time, and a plurality of collaboration controls 34. Through these collaboration controls 34, each participant Collaborative interactions used to support multi-person communication are centrally recorded. For example, the file control, note control and whiteboard control among them allow users to upload files, add notes and write on the whiteboard respectively. In the existing technology, file uploads may need to be copied or transmitted online to the interactive tablet, or uploaded when multi-user communication is reserved, as the focus of communication for other participants to view in advance; notes may be added through proprietary notes Editing application; whiteboard writing is only possible with separate whiteboard software. In this solution, all operations are triggered on the group recording interface 33 , so that all operations can be recorded on the group recording interface 33 , and of course, corresponding data can also be recorded on the group recording interface 33 .

In the process of multi-person interaction, the current screen projection data is also a type of data generated by the group. When the group is interacting with multiple people, at least one client terminal is in the screen projection state, and the client terminal in the screen projection state corresponds to the screen projection After the video stream is sent to the screen projection server, the screen projection server will process all the received video streams according to the operations on the interactive tablet and the client terminal. After the corresponding thumbnail is generated, the thumbnail is sent to the client terminal for display, and a screenshot control is also displayed in the thumbnail. When a trigger operation is detected in the screenshot control, it is confirmed that the corresponding instruction is received. The thumbnail can be a static picture, or an image updated according to the screen-casting video stream at a certain period, or an image synchronously updated in real time according to the screen-casting video stream.

As shown in Figure 4, it is assumed that when the XXX project communication group is interacting with multiple people, there are three client terminals in the screen projection state. After the screen projection video stream corresponding to each client terminal is sent to the screen projection server, the screen projection service The terminal will generate corresponding thumbnails 321 for all screen-casting video streams received, and then send the thumbnails 321 to the client terminal for display, specifically displayed in the information block 32 of the corresponding group recording interface 33 in the collaborative interaction interface 30, every A screenshot control 322 is also displayed for one of the thumbnail images 321.

Step S130: receiving a screenshot command generated by the screenshot control triggered on the collaborative interaction interface, and acquiring a thumbnail identifier corresponding to the screenshot command.

As shown in FIG. 4, if the screenshot control 322 in the thumbnail image 321 corresponding to the projection screen 1 detects a trigger operation, for example, any mouse click, shortcut key selection, and touch operation selection are detected in the display area of the screenshot control 322. An action that is considered to have received a trigger action performed by the corresponding actor. The client terminal correspondingly generates a screenshot command for screen projection 1, and sends the screenshot command to the screen projection server, and the screen projection server receives the screenshot command and obtains the thumbnail identifier corresponding to the screenshot command (for example, screen projection 1).

In the specific implementation process, the screenshot command generation of the client terminal can be further realized through the following interactive process:

receiving a preview instruction generated on the thumbnail at the client terminal, displaying a preview image corresponding to the thumbnail, and displaying the screenshot control in the preview image;

and receiving a screenshot instruction that triggers generation of the screenshot control in the preview image.

As shown in Figure 5, the thumbnail image 321 displayed on the client terminal may not be able to clearly view the specific content in the thumbnail image 322 because the display window is too small. At this time, the trigger operation received in the display area of the thumbnail image 321, After confirming that the preview instruction is received, in response to the preview instruction, the preview image 321' corresponding to the thumbnail image 321 is displayed in the information block 32, and the projected screen content is displayed more clearly in a larger window, which is convenient for the user to confirm the screenshot target. The screenshot control 322 is also correspondingly adjusted to be displayed in the preview image 321', and the screenshot instruction continues to be correspondingly generated in the screenshot control 322.

Step S140: Capture a frame image from the corresponding screen-casting video stream according to the thumbnail identifier, and send the frame image to a requesting terminal for display. The requesting terminal is the client terminal that sends the screenshot instruction.

Confirm the corresponding screen-casting video stream according to the thumbnail logo, and then intercept the frame image from the screen-casting video stream. The specific screenshot, sending and display process can be realized through the existing image processing and transmission technology, and the screenshot and transmission are not mentioned here. The process is described at the bottom level.

Considering that it is intercepting another participant's screen projection content, in order to ensure the protection of information, before performing step S140, further confirm the screenshot through the following steps:

Generate a screenshot request according to the screenshot instruction, and send the screenshot request to the client terminal corresponding to the thumbnail identifier for display on the collaborative interaction interface;

Acknowledging that the confirmation operation for the screenshot request is received on the collaborative interaction interface.

That is, after receiving the screenshot command, the screen projection server generates a screenshot request and sends it to the client terminal corresponding to the thumbnail logo, that is, the target client terminal of the screenshot. After confirming that the client terminal has received the confirmation operation, the screenshot and send.

Adapted to the multi-person collaborative design based on the collaborative interactive interface in this solution, the screenshot is also the data generated during the collaborative interactive process, and the corresponding received frame image is also displayed in the newly created information block of the collaborative interactive interface.

The frame image is saved in time sequence in the storage space corresponding to the user ID requesting the terminal to log in; when the user ID logs in at the client terminal, the data in the corresponding storage space is stored in the corresponding storage space in time sequence on the collaborative interaction interface. displayed in the information block. In group collaborative interaction, the processing of data may be a continuous process, such as whiteboard input, which will continue to be input until the input is unnecessary or the communication process ends. Then in this process, only one whiteboard file is generated, and the whiteboard file is recorded into a corresponding information block, and the information blocks are recorded in time sequence in the group record. Based on this, the entire process of data in the process of collaborative interaction has been recorded in an orderly manner. By accessing the application interface of collaborative interaction, users can quickly obtain all communication process behaviors and corresponding data generated by sequential multi-user communication, which shortens file circulation. The lengthy operation link in the process improves the efficiency of information flow.

The above method is used for the screen projection server, including: receiving the screen projection video stream sent by at least one client terminal during the cooperative operation of multiple client terminals; sending the thumbnail of the screen projection video stream to each of the clients The terminal displays, the thumbnails are displayed in the same information block of the collaborative interaction interface, and a screenshot control is correspondingly displayed in each of the thumbnails; receiving a screenshot instruction that triggers the generation of the screenshot control on the collaborative interaction interface, and obtaining the The thumbnail identification corresponding to the screenshot instruction; according to the thumbnail identification, the frame image is intercepted from the corresponding screen-casting video stream, and the frame image is sent to the requesting terminal for display, and the requesting terminal is the client terminal that sends the screenshot instruction . The screen-casting server sends the screen-casting video stream to each client terminal for preview display in the form of a thumbnail, the user sends a screenshot command through the screenshot control in the thumbnail, and the screen-casting server captures the corresponding frame image according to the screenshot command and sends it To the corresponding client terminal, it realizes the directional and autonomous screen capture of the multi-channel projection screen by the user on the client terminal.

FIG. 7 is a schematic structural diagram of a directional screen capture device for multi-person projection according to an embodiment of the present invention. Referring to FIG. 7 , the directional screenshot device for multi-person projection includes: a video stream receiving unit 210 , a thumbnail image sending unit 220 , a screenshot instruction receiving unit 230 and a screenshot sending unit 240 .

Among them, the video stream receiving unit 210 is used to receive the screen-casting video stream sent by at least one client terminal during the cooperative operation of multiple client terminals; the thumbnail image sending unit 220 is used to send the thumbnail image of the screen-casting video stream Each of the client terminals is displayed, and the thumbnails are displayed in the same information block of the collaborative interaction interface, and a screenshot control is correspondingly displayed in each of the thumbnails; the screenshot instruction receiving unit 230 is configured to receive The interface triggers the screenshot instruction generated by the screenshot control to obtain the thumbnail identifier corresponding to the screenshot instruction; the screenshot sending unit 240 is configured to intercept a frame image from the corresponding screen-casting video stream according to the thumbnail identifier, and send the frame The image is sent to the requesting terminal for display, and the requesting terminal is the client terminal that sends the screenshot instruction.

On the basis of the foregoing embodiments, the screenshot instruction is generated in the following manner:

receiving a preview instruction generated on the thumbnail at the client terminal, displaying a preview image corresponding to the thumbnail, and displaying the screenshot control in the preview image;

and receiving a screenshot instruction that triggers generation of the screenshot control in the preview image.

On the basis of the foregoing embodiments, the device further includes:

A screenshot request sending unit, configured to generate a screenshot request according to the screenshot instruction, and send the screenshot request to the client terminal corresponding to the thumbnail identifier for display on the collaborative interaction interface;

A screenshot operation confirming unit, configured to confirm that a confirmation operation for the screenshot request is received on the collaborative interaction interface.

On the basis of the above embodiments, the frame image is displayed on the newly created information block of the collaborative interaction interface.

On the basis of the above embodiments, the frame images are saved in time sequence in the storage space corresponding to the user ID requesting terminal login;

When the user ID logs in at the client terminal, the data in the corresponding storage space is displayed in the corresponding information block in time sequence on the collaborative interaction interface.

On the basis of the above embodiments, the screen projection server is an interactive tablet, and the client terminal and the interactive tablet are connected through the same local area network.

On the basis of the above embodiments, the screen projection server is a server, and the client terminal is connected to the server through a wide area network.

The directional screen capture device for multi-person projection provided by the embodiment of the present invention is included in an electronic device, and can be used to execute any directional screen capture method for multi-person projection provided in the above embodiments, and has corresponding functions and beneficial effects.

It is worth noting that, in the embodiment of the above-mentioned directional screen-capturing device for multi-person projection, the units and modules included are only divided according to functional logic, but are not limited to the above-mentioned divisions, as long as the corresponding functions can be realized. Yes; in addition, the specific names of the functional units are only for the convenience of distinguishing each other, and are not used to limit the protection scope of the present invention.

FIG. 8 is a schematic structural diagram of an electronic device provided by an embodiment of the present invention. As shown in Figure 8, the electronic device includes a processor 310, a memory 320, an input device 330, an output device 340, and a communication device 350; The processor 310 is taken as an example; the processor 310, memory 320, input device 330, output device 340, and communication device 350 in the electronic device can be connected via a bus or in other ways. In FIG. 8, the connection via a bus is taken as an example.

The memory 320, as a computer-readable storage medium, can be used to store software programs, computer-executable programs and modules, such as program instructions/modules corresponding to the directional screenshot method of multi-person projection in the embodiment of the present invention (for example, multi-person The video stream receiving unit 210, the thumbnail image sending unit 220, the screenshot command receiving unit 230 and the screenshot sending unit 240 in the directional screen capture device for screen projection). The processor 310 executes various functional applications and data processing of the electronic device by running the software programs, instructions and modules stored in the memory 320 , that is, realizes the above-mentioned directional screen capture method of multi-person screen projection.

The memory 320 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system and an application program required by at least one function; the data storage area may store data created according to the use of the electronic device, and the like. In addition, the memory 320 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid-state storage devices. In some examples, the memory 320 may further include memory located remotely relative to the processor 310, and these remote memories may be connected to the electronic device through a network. Examples of the aforementioned networks include, but are not limited to, the Internet, intranets, local area networks, mobile communication networks, and combinations thereof.

The input device 330 can be used to receive input numbers or character information, and generate key signal input related to user settings and function control of the electronic device. The output device 340 may include a display device such as a display screen.

The above-mentioned electronic equipment includes a directional screen capture device for multi-person projection, which can be used to execute any directional screen capture method for multi-person projection, and has corresponding functions and beneficial effects.

An embodiment of the present invention also provides a storage medium containing computer-executable instructions, and the computer-executable instructions are used to perform the directional screen capture method for multi-person projection provided in any embodiment of the present application when executed by a computer processor related operations, and have corresponding functions and beneficial effects.

Those skilled in the art should understand that the embodiments of the present application may be provided as methods, systems, or computer program products.

Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein. The present application is described with reference to flowcharts and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the present application. It should be understood that each procedure and/or block in the flowchart and/or block diagram, and a combination of procedures and/or blocks in the flowchart and/or block diagram can be realized by computer program instructions. These computer program instructions may be provided to a general purpose computer, special purpose computer, embedded processor, or processor of other programmable data processing equipment to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing equipment produce a An apparatus for realizing the functions specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram. These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to operate in a specific manner, such that the instructions stored in the computer-readable memory produce an article of manufacture comprising instruction means, the instructions The device realizes the function specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram. These computer program instructions can also be loaded onto a computer or other programmable data processing device, causing a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process, thereby The instructions provide steps for implementing the functions specified in the flow chart or blocks of the flowchart and/or the block or blocks of the block diagrams.

In a typical configuration, a computing device includes one or more processors (CPUs), input/output interfaces, network interfaces, and memory. Memory may include non-permanent storage in computer readable media, in the form of random access memory (RAM) and/or nonvolatile memory such as read only memory (ROM) or flash RAM. The memory is an example of a computer readable medium.

Computer-readable media, including both permanent and non-permanent, removable and non-removable media, can be implemented by any method or technology for storage of information. Information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read only memory (ROM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Flash memory or other memory technology, Compact Disc Read-Only Memory (CD-ROM), Digital Versatile Disc (DVD) or other optical storage, Magnetic tape cartridge, tape magnetic disk storage or other magnetic storage device or any other non-transmission medium that can be used to store information that can be accessed by a computing device. As defined herein, computer-readable media excludes transitory computer-readable media, such as modulated data signals and carrier waves.

It should also be noted that the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus comprising a set of elements includes not only those elements, but also includes Other elements not expressly listed, or elements inherent in the process, method, commodity, or apparatus are also included. Without further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

Note that the above are only preferred embodiments of the present invention and applied technical principles. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the protection scope of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and can also include more other equivalent embodiments without departing from the concept of the present invention, and the present invention The scope is determined by the scope of the appended claims.

Claims (10)

1. A directional screen capture method for multi-person screen projection, used for screen projection server, is characterized in that, comprising: Receive the screen-casting video stream sent by at least one client terminal during the collaborative operation of multiple client terminals; Sending the thumbnail of the screen-casting video stream to each of the client terminals for display, the thumbnail is displayed in the same information block of the collaborative interactive interface, and each of the thumbnails is correspondingly displayed with a screenshot control; receiving a screenshot instruction generated by triggering the screenshot control on the collaborative interaction interface, and acquiring a thumbnail identifier corresponding to the screenshot instruction; Capture a frame image from the corresponding screen-casting video stream according to the thumbnail identifier, and send the frame image to a requesting terminal for display, and the requesting terminal is the client terminal that sends the screenshot instruction. 2. The method according to claim 1, wherein the screenshot instruction is generated in the following manner: receiving a preview instruction generated on the thumbnail at the client terminal, displaying a preview image corresponding to the thumbnail, and displaying the screenshot control in the preview image; and receiving a screenshot instruction that triggers generation of the screenshot control in the preview image. 3. The method according to claim 1, wherein the step of intercepting a frame image from the corresponding screen-casting video stream according to the thumbnail identification, and sending the frame image to the requesting terminal for displaying, further includes: Generate a screenshot request according to the screenshot instruction, and send the screenshot request to the client terminal corresponding to the thumbnail identifier for display on the collaborative interaction interface; Acknowledging that the confirmation operation for the screenshot request is received on the collaborative interaction interface. 4. The method according to claim 1, wherein the frame image is displayed on a newly created information block of the collaborative interaction interface. 5. The method according to claim 4, wherein the frame images are saved in time sequence in the storage space corresponding to the user ID requesting terminal login; When the user ID logs in at the client terminal, the data in the corresponding storage space is displayed in the corresponding information block in time sequence on the collaborative interaction interface. 6. The method according to claim 1, wherein the screen projection server is an interactive tablet, and the client terminal and the interactive tablet are connected through the same local area network. 7. The method according to claim 1, wherein the screen projection server is a server, and the client terminal is connected to the server through a wide area network. 8. A directional screen capture device for multi-person screen projection, used for screen projection server, characterized in that it includes: The video stream receiving unit is used to receive the projection video stream sent by at least one client terminal during the collaborative operation of multiple client terminals; A thumbnail image sending unit, configured to send the thumbnail image of the projected screen video stream to each of the client terminals for display, the thumbnail images are displayed in the same information block of the collaborative interaction interface, and each of the thumbnail images is correspondingly displayed There is a screenshot control; A screenshot instruction receiving unit, configured to receive a screenshot instruction generated by triggering the screenshot control on the collaborative interaction interface, and obtain a thumbnail identifier corresponding to the screenshot instruction; A screenshot sending unit, configured to intercept a frame image from the corresponding screen-casting video stream according to the thumbnail identifier, and send the frame image to a requesting terminal for display, and the requesting terminal is the client terminal sending the screenshot instruction. 9. An electronic device, characterized in that it comprises: one or more processors; memory for storing one or more programs; When the one or more programs are executed by the one or more processors, the interactive tablet realizes the directional screen capture method for multi-person projection according to any one of claims 1-7. 10. A computer-readable storage medium, on which a computer program is stored, characterized in that, when the program is executed by a processor, the directional screen capture method for multi-person projection according to any one of claims 1-7 is implemented.

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