CN111009021A - Playback method of electronic whiteboard and related equipment - Google Patents
Playback method of electronic whiteboard and related equipment Download PDFInfo
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Abstract
The application provides a playback method of an electronic whiteboard and related equipment, wherein the method comprises the following steps: the first electronic whiteboard receives a playback request input by a user, wherein the playback request is used for indicating that the playing is resumed from a first moment; the first electronic whiteboard determines a first preset moment corresponding to the first moment according to the first moment; the first electronic whiteboard searches for a first snapshot according to a first preset moment, wherein the first snapshot is a snapshot of the first electronic whiteboard on a first operation result at the first preset moment, the first operation result is a result obtained by drawing the first electronic whiteboard according to first operation information, and the first operation information is operation information from the initial moment to the first preset moment; and the first electronic whiteboard is used for drawing on the basis of the first snapshot according to second operation information to obtain a second operation result, wherein the second operation information is operation information from a first preset moment to a second moment.
Description
Technical Field
The present application relates to the field of computer applications, and in particular, to an electronic whiteboard playback method and related devices.
Background
The electronic whiteboard is a virtual public area of an electronic environment established by using communication means, and the use of the electronic whiteboard can enable participants at different places to put forward questions, discuss the questions and issue comments through a common 'screen', and also enable the operation (such as character input, drawing operation and the like) of any one participant to be transmitted and displayed on the shared whiteboard of other participants in real time.
In a conventional electronic whiteboard, in a video recording process, a screen capture mode is adopted to record an action track of a user on a drawing board, so as to obtain a screen capture picture of each time node. The information acquired in this way is usually picture information, so that the recorded file occupies a large space and is low in uploading speed. In addition, the width and height of the recorded screen are easily limited in the video playback process, so that the phenomenon of image blurring can occur when the recorded video is played on the screen with the recording definition being exceeded, and when the recorded video is paused at a certain time point, a user cannot switch and view data of different current pages. Therefore, how to quickly and effectively view the video data generated by the electronic whiteboard in the playback process still remains a problem to be solved urgently.
Disclosure of Invention
The embodiment of the application discloses a playback method of an electronic whiteboard and related equipment, which can be used for quickly and effectively checking video data generated in the playback process of the electronic whiteboard.
In a first aspect, the present application provides a playback method of an electronic whiteboard, which is applied to a first electronic whiteboard, and includes:
the first electronic whiteboard receives a playback request input by a user, wherein the playback request is used for indicating that the playing is resumed from a first moment;
the first electronic whiteboard determines a first preset moment corresponding to the first moment according to the first moment;
the first electronic whiteboard searches for a first snapshot according to a first preset moment, wherein the first snapshot is a snapshot of the first electronic whiteboard on a first operation result at the first preset moment, the first operation result is a result obtained by drawing the first electronic whiteboard according to first operation information, and the first operation information is operation information from the initial moment to the first preset moment;
and the first electronic whiteboard is used for drawing on the basis of the first snapshot according to second operation information to obtain a second operation result, wherein the second operation information is operation information from a first preset moment to a second moment.
According to the method, the first electronic whiteboard receives a playback request input by a user, determines a first snapshot according to the playback request, then draws according to second operation information on the basis of the first snapshot to obtain a second operation result, and finally displays the second operation result on the first electronic whiteboard screen from the first moment. According to the method, the electronic whiteboard draws the second operation information from the first preset time based on the first snapshot, compared with the method that the electronic whiteboard draws from the initial time, the drawing steps and the drawing time are shortened, the playback speed is accelerated, and the time of a user is saved.
In this embodiment of the application, determining, by the first electronic whiteboard and according to the first time, a first preset time corresponding to the first time includes: determining the first preset time as the first time under the condition that the first time is any one of m preset times, wherein m is a positive integer; under the condition that the first time is not any one of m preset times, determining the first preset time as a preset time adjacent to the left of the first time; alternatively, the first and second electrodes may be,
determining a first preset time as a first time under the condition that the number of the operation information received at the first time is any one preset number of n preset numbers; when the number of the operation information received at the first time is not any one preset number of n preset numbers, and the number of the operation information received at the first time is larger than the first preset number and smaller than the second preset number, determining that the preset time corresponding to the first preset number is the first preset time, wherein n is a positive integer, the n preset numbers are arranged in a descending order, and the first preset number is adjacent to the second preset number.
Therefore, the first snapshot can be quickly determined by the first electronic whiteboard by judging whether the first moment is the first preset moment or whether the quantity of the operation information received at the first moment is the operation quantity corresponding to the first preset moment, and the first electronic whiteboard continues to draw on the basis of the first snapshot, so that the time for drawing the first electronic whiteboard according to the operation information is shortened.
In an embodiment of the present application, the method further includes: under the condition that the second moment is any one of m preset moments, the first electronic whiteboard carries out snapshot on the second operation result at the second moment so as to obtain a second snapshot; under the condition that the second moment is not any one of the m preset moments, the first electronic whiteboard carries out snapshot on the second operation result at the preset moment adjacent to the left of the second moment, so as to obtain a second snapshot; alternatively, the first and second electrodes may be,
under the condition that the number of the operation information received at the second moment is any one preset number of n preset numbers, the first electronic whiteboard carries out snapshot on a second operation result at the second moment so as to obtain a second snapshot; and under the condition that the quantity of the operation information received at the second moment is not any one of the n preset quantities, and the quantity of the operation information received at the second moment is greater than a third preset quantity and less than a fourth preset quantity, carrying out snapshot on a second operation result according to the preset moment corresponding to the third preset quantity so as to obtain a second snapshot, wherein the third preset quantity is adjacent to the fourth preset quantity.
The first electronic whiteboard snapshots the operation result only at the preset time or the time corresponding to the preset number, so that the snapshot mode can reduce the number of snapshots and the occupied storage space, and the playback speed can be accelerated by using the snapshots, thereby saving the time of the user and supporting the switching and viewing of the operation information.
In this embodiment of the application, the first operation information and the second operation information are sent to the first electronic whiteboard by the second electronic whiteboard, or the first operation information and the second operation information are triggered by the user on the first electronic whiteboard.
It can be seen that, in the playback process of the first electronic whiteboard, the playback can be realized through single-end operation of the first electronic whiteboard, or can be realized through multi-end interaction of the first electronic whiteboard and the second electronic whiteboard, so that the electronic whiteboard playback method has wide application.
In this embodiment of the application, when the first operation information and the second operation information are sent to the first electronic whiteboard by the second electronic whiteboard, before the first electronic whiteboard performs drawing according to the second operation information on the basis of the first snapshot, the method further includes: determining the screen width and height of a first electronic whiteboard and the screen width and height of a second electronic whiteboard; establishing a proportional relation between the screen width and height of the first electronic whiteboard and the screen width and height of the second electronic whiteboard; and drawing the second operation information on the basis of the first snapshot according to the proportional relation.
It can be seen that the first electronic whiteboard draws the operation information according to the proportional relationship between the screen widths and the screen heights by determining the screen widths and the screen heights of the first electronic whiteboard and the second electronic whiteboard, so that the operation information of the second electronic whiteboard can not be limited by the screen width and the screen height of the second electronic whiteboard when the first electronic whiteboard plays back the operation information of the second electronic whiteboard, and the playing definition of the operation result on the first electronic whiteboard is improved.
In a second aspect, the present application provides an electronic whiteboard, comprising:
the device comprises an acquisition unit, a playback unit and a control unit, wherein the acquisition unit is used for receiving a playback request input by a user, and the playback request is used for indicating that the playback is started from a first moment;
the determining unit is used for determining a first preset time corresponding to the first time according to the first time;
the searching unit is used for searching a first snapshot according to a first preset time, wherein the first snapshot is a snapshot of the first electronic whiteboard on a first operation result at the first preset time, the first operation result is a result obtained by drawing the first electronic whiteboard according to first operation information, and the first operation information is operation information from an initial time to the first preset time;
and the drawing unit is used for drawing according to the second operation information on the basis of the first snapshot so as to obtain a second operation result, wherein the second operation information is the operation information from the first preset time to the second time.
In an embodiment of the present application, the determining unit is specifically configured to: determining the first preset time as the first time under the condition that the first time is any one of m preset times, wherein m is a positive integer; under the condition that the first time is not any one of m preset times, determining the first preset time as a preset time adjacent to the left of the first time; alternatively, the first and second electrodes may be,
determining a first preset time as a first time under the condition that the number of the operation information received at the first time is any one preset number of n preset numbers; when the number of the operation information received at the first time is not any one preset number of n preset numbers, and the number of the operation information received at the first time is larger than the first preset number and smaller than the second preset number, determining that the preset time corresponding to the first preset number is the first preset time, wherein n is a positive integer, the n preset numbers are arranged in a descending order, and the first preset number is adjacent to the second preset number.
In this embodiment of the present application, the electronic whiteboard further includes a snapshot unit, where the snapshot unit is configured to: under the condition that the second moment is any one of m preset moments, the first electronic whiteboard carries out snapshot on the second operation result at the second moment so as to obtain a second snapshot; under the condition that the second moment is not any one of the m preset moments, the first electronic whiteboard carries out snapshot on the second operation result at the preset moment adjacent to the left of the second moment so as to obtain a second snapshot; alternatively, the first and second electrodes may be,
under the condition that the number of the operation information received at the second moment is any one preset number of n preset numbers, the first electronic whiteboard carries out snapshot on a second operation result at the second moment so as to obtain a second snapshot; and under the condition that the quantity of the operation information received at the second moment is not any one of the n preset quantities, and the quantity of the operation information received at the second moment is greater than a third preset quantity and less than a fourth preset quantity, carrying out snapshot on a second operation result according to the preset moment corresponding to the third preset quantity so as to obtain a second snapshot, wherein the third preset quantity is adjacent to the fourth preset quantity.
In this embodiment of the application, the first operation information and the second operation information are sent to the first electronic whiteboard by the second electronic whiteboard, or the first operation information and the second operation information are triggered by the user on the first electronic whiteboard.
In this embodiment of the application, when the first operation information and the second operation information are sent to the first electronic whiteboard by the second electronic whiteboard, before the first electronic whiteboard performs drawing according to the second operation information on the basis of the first snapshot, the drawing unit is further configured to: determining the screen width and height of a first electronic whiteboard and the screen width and height of a second electronic whiteboard; establishing a proportional relation between the screen width and height of the first electronic whiteboard and the screen width and height of the second electronic whiteboard; and drawing the second operation information on the basis of the first snapshot according to the proportional relation.
In a third aspect, the present application provides an electronic whiteboard, including: a processor, a communication interface, and a memory; the memory is for storing instructions, the processor is for executing the instructions, and the communication interface is for communicating with other devices under control of the processor, wherein the processor when executing the instructions is to implement the method of any of the first aspect.
In a fourth aspect, the present application also provides a computer-readable storage medium storing a computer program for execution by hardware to implement the method of any one of the first aspect.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the background art, the drawings required to be used in the description of the embodiments of the present application will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a schematic diagram of a method for performing point-filling on lost information according to the present application;
fig. 2A is a schematic diagram of a possible first electronic whiteboard display interface provided herein;
fig. 2B is a schematic diagram of another possible first electronic whiteboard display interface provided herein;
fig. 3 is a schematic flowchart of a playback method of an electronic whiteboard provided in the present application;
fig. 4 is a schematic structural diagram of an electronic whiteboard provided in the present application;
fig. 5 is a schematic structural diagram of another electronic whiteboard provided in the present application.
Detailed Description
The terminology used in the embodiments of the present application is for the purpose of describing particular embodiments of the present application only and is not intended to be limiting of the present application.
The electronic whiteboard playback method and the electronic whiteboard provided by the application can be used for replacing a blackboard in on-site classroom teaching, and can also be applied to a plurality of application scenes such as remote education, conference demonstration, business conversation and the like.
An electronic whiteboard, as the name implies, is developed from a common whiteboard, and is equivalent to a touch screen of a computer, and a user can use a finger or a sensing pen to touch options displayed on the touch screen to complete designated work (e.g., inserting pictures and courseware), or the user can directly write, draw and the like on the touch screen. In addition, the user can add a plurality of operations such as annotation, editing, playback and storage to the content displayed on the electronic whiteboard in the explaining process, so that a plurality of participants or teachers and students can communicate face to face in real time, and the sharing cooperation is realized while the working efficiency is improved. Several common electronic whiteboards include: the electronic whiteboard can be in information communication with a computer, that is, the electronic whiteboard is connected to the computer, the content displayed on the computer can be projected onto a screen of the electronic whiteboard by using a projector, and the electronic whiteboard is in communication connection with other electronic whiteboards through a network, so that a network conference or network teaching and the like are realized.
When writing, drawing or other operations are performed on the screen of the electronic whiteboard, the electronic whiteboard generally performs screen capture operations by using a bottom screen capture function provided by an Android system, obtains multiple frames of pictures by capturing operation information displayed on the screen of the electronic whiteboard, sends the pictures carrying the operation information to a server, and finally sends the pictures to other electronic whiteboards for playback by the server. Although the playback method using the screen capture mode can realize multi-platform compatible operation and has low transplantation cost, the occupied space of the picture is large, and the definition of the picture during playback is easily limited by the width and the height of the screen captured, so that the picture is blurred during playback.
In order to solve the problems of slow playback speed, unclear pictures, large occupied space and the like caused by screen capturing operation, the application provides the playback method of the electronic whiteboard. Meanwhile, the method stores the operation information instead of the picture carrying the operation information, thereby saving the storage space and improving the resource utilization rate.
First, the operation information played back on the first electronic whiteboard according to the embodiment of the present application will be described in detail.
In a specific embodiment of the present application, the operation information may be information obtained when a user directly operates on the screen of the first electronic whiteboard, or may be operation information sent by the second electronic whiteboard to the first electronic whiteboard. And under the condition that the operation information is sent to the first electronic whiteboard by the second electronic whiteboard, the first electronic whiteboard and the second electronic whiteboard are connected through a network. For example, the operation information received by the teacher-side electronic whiteboard may be information when the teacher operates on the teacher-side electronic whiteboard, or may be information when the student operates on the student-side electronic whiteboard. Therefore, the operation information received by the first electronic whiteboard may be a straight line, a curved line or various graphics drawn on the first electronic whiteboard or the second electronic whiteboard by the user, a picture, a video or a created form loaded on the first electronic whiteboard or the second electronic whiteboard by the user, or the like, or a page turning operation, an erasing operation, or the like performed on the first electronic whiteboard or the second electronic whiteboard by the user, which is not specifically limited herein.
In this embodiment of the application, if the operation information is obtained when the user directly operates on the first electronic whiteboard screen, after receiving the operation information, the first electronic whiteboard needs to store the operation information, and then compress the stored operation information and store the compressed operation information on the disk. In this embodiment, the first electronic whiteboard records the operation information triggered by the user, instead of the picture information, so that the storage space occupied by the data information obtained after the compression processing is greatly reduced.
In this embodiment of the application, if the operation information is sent to the first electronic whiteboard by the second electronic whiteboard, the operation information received by the first electronic whiteboard is a compressed file, where the compressed file is obtained by compressing, by the second electronic whiteboard, the operation information triggered by the other users on the screen of the second electronic whiteboard. Since the second electronic whiteboard records operation information triggered by other users, not picture information, in this embodiment, when the second electronic whiteboard transmits the operation information obtained after the compression processing to the first electronic whiteboard, the transmission rate is greatly improved.
In the embodiment of the present application, as shown in fig. 1, the operation information received by the first electronic whiteboard may be lost operation information (left image), so that the first electronic whiteboard needs to perform a point supplementing operation on the received operation information after receiving the operation information to obtain the operation information after point supplementing (right image). The method comprises the following specific steps: the first electronic whiteboard arranges the received operation information in sequence, and under the condition that the received information is continuous, the first electronic whiteboard puts the operation information into a data pool in sequence for storage; under the condition that the received information is discontinuous, the first electronic whiteboard firstly enters a waiting state, and when the waiting time length exceeds the preset time length, the received operation information is compared with the sent operation information, and whether the information is lost in the information transmission process is judged. If the information is lost, the first electronic whiteboard supplements the lost information according to a preset point supplementing rule, and then stores the supplemented information into a data pool; or the first electronic whiteboard carries out tail breaking operation on the received information, carries out newly adding ending operation on the information after all the information is received, and then stores the newly added information into the data pool, namely, the first electronic whiteboard firstly disassembles the received data information, if the discontinuous position is ended in an abnormal way (such as information is deleted, tampered or stolen, and the like), the connection between the abnormal data and other data is cut off, and the abnormal data is regenerated after the data information is received, so that the further illegal operation on other data is blocked, and the safety of the data is protected. Therefore, after the first electronic whiteboard performs point supplementing on the lost part of the received operation information, complete data information can be provided for the user, and the experience of the user is improved.
In a specific embodiment of the present application, the first electronic whiteboard may perform drawing according to the operation information to obtain a corresponding operation result, that is, the first electronic whiteboard performs drawing on the operation information to obtain a segment of video data, where the operation information is recorded in the segment of video data. In the drawing process of the first electronic whiteboard, when the drawing time reaches a preset moment or the drawing quantity reaches a preset quantity, the first electronic whiteboard carries out snapshot on the drawn operation result.
For example, as shown in fig. 2A, fig. 2A shows a schematic diagram of a possible first electronic whiteboard display interface, wherein, assuming that the first electronic whiteboard needs to play video data with a duration of 5 minutes, assuming that 1 preset time is set every 1 minute, the first electronic whiteboard needs to take snapshots of operation results at 5 preset times in the drawing process, where the 5 preset times are respectively the 1 st minute, the 2 nd minute, the 3 rd minute, the 4 th minute, and the 5 th minute, and the snapshot of the 1 st minute records the video data of the 0 th minute to the 1 st minute, the snapshot of the 2 nd minute records the video data of the 0 th minute to the 2 nd minute, the snapshot of the 3 rd minute records the video data of the 0 th minute to the 3 rd minute, the snapshot of the 4 th minute records the video data of the 0 th minute to the 4 th minute, the 5 minute snapshot records the 0 th minute to 5 th minute video data.
For another example, as shown in fig. 2B, fig. 2B shows another possible schematic diagram of a first electronic whiteboard display interface, where it is assumed that the first electronic whiteboard needs to play video data with 500 pieces of operation information, and it is assumed that each time 100 pieces of operation information are drawn, the first electronic whiteboard needs to snapshot operation results at 5 preset numbers during the drawing process, where the 5 preset numbers are 100 th, 200 th, 300 th, 400 th, and 500 th, respectively, and snapshots performed when the drawing number reaches 100 th record operation information of 0 th to 100 th, snapshots performed when the drawing number reaches 200 th record operation information of 0 th to 200 th, snapshots performed when the drawing number reaches 300 th record operation information of 0 th to 300 th, the snapshot performed when the drawing number reaches the 400 th entry records the operation information of the 0 th to the 400 th entries, and the snapshot performed when the drawing number reaches the 500 th entry records the operation information of the 0 th to the 500 th entries.
It should be noted that the preset time and the preset number are dynamically calculated by the electronic whiteboard according to the performance and the played back data of the machine, for example, in a video with a duration of 5 minutes, the preset time may be the 1 st minute, the 2 nd minute, the 3 rd minute, the 4 th minute and the 5 th minute mentioned in the above example, or may be the 1 st minute, the 1.5 th minute, the 3.5 th minute and the 5 th minute, and the preset number may be the 100 th, the 200 th, the 300 th, the 400 th and the 500 th, or may be the 50 th, the 300 th and the 360 th mentioned in the above example, which is not limited specifically herein.
Referring to fig. 3, fig. 3 is a schematic flowchart of an electronic whiteboard playback method provided in the present application. The electronic whiteboard playback method of the present embodiment is applied to a first electronic whiteboard, and includes, but is not limited to, the following steps:
s101, the first electronic whiteboard receives a playback request input by a user, wherein the playback request is used for indicating the first electronic whiteboard to play the operation information again from the first moment.
Specifically, when receiving a playback request input by a user, the first electronic whiteboard first extracts and obtains compressed operation information from a magnetic disk, and performs decompression operation on the operation information to obtain the operation information. And under the condition that the operation information is sent to the first electronic whiteboard by the second electronic whiteboard, the first electronic whiteboard further needs to analyze the operation information to obtain the screen width and height information of the second electronic whiteboard and the system version information of the second electronic whiteboard. It can be understood that, in the communication process of different electronic whiteboards, data may be lost or data cannot be read due to different system versions, and therefore, the first electronic whiteboard obtains the system version of the second electronic whiteboard by analyzing the operation information, and then compares the system version information of the first electronic whiteboard with the system version information of the second electronic whiteboard, and if the system version information of the first electronic whiteboard and the system version information of the second electronic whiteboard are different, system compatibility processing is performed, and the operation information is converted into information that can be processed by the first electronic whiteboard.
After the first electronic whiteboard decompresses the compressed operation information, it is further required to determine whether the information is lost during the information decompression process. If the information is lost, the first electronic whiteboard supplements the lost information according to a preset point supplementing rule, and then draws by using the supplemented information; or the first electronic whiteboard carries out tail breaking operation on the received information, carries out newly-added ending operation on the information after all information is decompressed, and then draws by using the newly-added information.
S102, the first electronic whiteboard determines a first preset time corresponding to the first time according to the first time.
In this embodiment of the application, determining, by the first electronic whiteboard and according to the first time, a first preset time corresponding to the first time includes: determining the first preset time as the first time under the condition that the first time is any one of m preset times, wherein m is a positive integer; under the condition that the first time is not any one of m preset times, determining the first preset time as a preset time adjacent to the left of the first time; alternatively, the first and second electrodes may be,
determining a first preset time as a first time under the condition that the number of the operation information received at the first time is any one preset number of n preset numbers; when the number of the operation information received at the first time is not any one preset number of n preset numbers, and the number of the operation information received at the first time is larger than the first preset number and smaller than the second preset number, determining that the preset time corresponding to the first preset number is the first preset time, wherein n is a positive integer, the n preset numbers are arranged in a descending order, and the first preset number is adjacent to the second preset number.
For example, as shown in fig. 2A, the first electronic whiteboard plays back video data with a duration of 5 minutes, and the preset times are respectively the 1 st minute, the 2 nd minute, the 3 rd minute, the 4 th minute and the 5 th minute. If the user wants to view the video data of the 1 st minute, the user can drag the time progress bar to the 1 st minute by dragging the time progress bar, where the first moment is the 1 st minute, and the first electronic whiteboard determines that the first preset moment is the 1 st minute because the 1 st minute belongs to 5 preset moments. If the user wants to view the video data of the 1.2 th minute, the user drags the progress bar to the 1.2 th minute, where the first time is the 1.2 th minute, and since the preset time adjacent to the 1.2 th minute is the 1 st minute among the 5 preset times, the first electronic whiteboard determines that the first preset time is the 1 st minute.
For another example, as shown in fig. 2B, the first electronic whiteboard plays back a piece of video data with 500 pieces of operation information, and the preset numbers are the 100 th, 200 th, 300 th, 400 th and 500 th pieces, respectively, and the times corresponding to the preset numbers are the 1 st minute, the 1.5 th minute, the 2.5 th minute, the 4.5 th minute and the 5 th minute, respectively. If the user wants to view the video data in the 1 st minute, and the number of the operation information drawn by the first electronic whiteboard in the 1 st minute is 100, since the 100 th item belongs to the 5 preset numbers, the first electronic whiteboard determines that the first preset time is the 1 st minute. If the user wants to view the video data in the 1.2 th minute and the number of operation information drawn by the first electronic whiteboard in the 1.2 th minute is 120, since 100<120<200, the first electronic whiteboard determines that the first preset time is the time corresponding to the 100 th time, that is, the first preset time is the 1 st minute.
S103, the first electronic whiteboard searches for a first snapshot according to a first preset moment.
In this embodiment of the application, the first snapshot is a snapshot of the first electronic whiteboard performed on the first operation result at a first preset time, the first operation result is a result obtained by drawing the first electronic whiteboard according to the first operation information, and the first operation information is operation information from an initial time to the first preset time. It can be understood that the first electronic whiteboard carries out snapshot on the drawn video data within the time period from the initial time to the preset time when the first electronic whiteboard is drawn to the preset time. The method can greatly reduce the number of snapshots and improve the utilization rate of system resources.
And S104, drawing the first electronic whiteboard according to the second operation information on the basis of the first snapshot, so as to obtain a second operation result.
The second operation information is operation information from a first preset time to a second time.
In this embodiment of the application, the first operation information and the second operation information are sent to the first electronic whiteboard by the second electronic whiteboard, or the first operation information and the second operation information are triggered by the user on the first electronic whiteboard. It is to be understood that the first operation information and the second operation information both belong to the above operation information, and the "first" and the "second" are only used herein to distinguish that the corresponding drawing times of the first operation information and the second operation information are different, that is, the first operation information is the operation information from the initial time to the first preset time, and the second operation information is the operation information from the first preset time to the second time.
In this embodiment of the application, when the first operation information and the second operation information are sent to the first electronic whiteboard by the second electronic whiteboard, before the first electronic whiteboard performs drawing according to the second operation information on the basis of the first snapshot, the method further includes: determining the screen width and height of a first electronic whiteboard and the screen width and height of a second electronic whiteboard; establishing a proportional relation between the screen width and height of the first electronic whiteboard and the screen width and height of the second electronic whiteboard; and drawing the second operation information on the basis of the first snapshot according to the proportional relation.
In an embodiment of the present application, the method further includes: under the condition that the second moment is any one of m preset moments, the first electronic whiteboard carries out snapshot on the second operation result at the second moment so as to obtain a second snapshot; under the condition that the second moment is not any one of the m preset moments, the first electronic whiteboard carries out snapshot on the second operation result at the preset moment adjacent to the left of the second moment, so as to obtain a second snapshot; alternatively, the first and second electrodes may be,
under the condition that the number of the operation information received at the second moment is any one preset number of n preset numbers, the first electronic whiteboard carries out snapshot on a second operation result at the second moment so as to obtain a second snapshot; and under the condition that the quantity of the operation information received at the second moment is not any one of the n preset quantities, and the quantity of the operation information received at the second moment is greater than a third preset quantity and less than a fourth preset quantity, carrying out snapshot on a second operation result according to the preset moment corresponding to the third preset quantity so as to obtain a second snapshot, wherein the third preset quantity is adjacent to the fourth preset quantity.
In the method, the first electronic whiteboard draws the received operation information to obtain the operation result, and carries out snapshot on the operation result at the preset time, so that when a user wants to check the operation result at the playback time, the user can directly start drawing from the snapshot at the preset time corresponding to the playback time instead of starting to draw again from the initial time, thereby saving the drawing time and improving the playback efficiency. Meanwhile, the method improves the resource utilization rate by storing the operation information, and greatly saves the storage space compared with the traditional method for storing the picture information. In addition, the display definition of the operation result obtained by the method is matched with the screen width and height of the first electronic whiteboard, so that the watching experience of a user is improved. Therefore, the method not only can realize the switching viewing of the operation result, but also saves the storage space, and improves the playback efficiency and the comfort level of the user.
In order to facilitate understanding of the electronic whiteboard playback method according to the foregoing embodiment, the electronic whiteboard playback method according to the embodiment of the present application is described in detail below by way of example, and includes the following specific steps:
step one, the first electronic whiteboard receives operation information sent by the second electronic whiteboard and a playback request input by a user, wherein the playback request is used for indicating the first electronic whiteboard to play again from the playback time.
And step two, the first electronic whiteboard decompresses the operation information according to the playback request.
And step three, the first electronic whiteboard analyzes and processes the decompressed information to obtain the width and height of the screen of the second electronic whiteboard, and further obtain the width-height ratio of the display interface of the second electronic whiteboard.
And step four, the first electronic whiteboard sets the width-height ratio of the display interface of the first electronic whiteboard to the width-height ratio of the display interface of the second electronic whiteboard.
And fifthly, drawing the first electronic whiteboard from the initial time according to the operation information, and carrying out snapshot at a plurality of preset times.
And step six, the first electronic whiteboard determines a preset moment corresponding to the playback moment according to the playback request, so that drawing is started and a drawing result is displayed on a screen of the first electronic whiteboard on the basis of a snapshot of the preset moment corresponding to the playback moment.
For example, if the operation information received by the first electronic whiteboard is a video with a duration of 3 minutes, the first electronic whiteboard performs drawing according to the received operation information from the initial time, and when the drawing reaches the 1 st minute, performs snapshot on the video data already drawn in the period from the initial time to the 1 st minute; then, the first electronic whiteboard continues to draw from the 1 st minute on the basis of the snapshot at the 1 st minute, and when the 2 nd minute is drawn, the video data which are already drawn in the period from the initial time to the 2 nd minute are subjected to snapshot; then, the first electronic whiteboard continues to draw from the 2 nd minute on the basis of the snapshot at the 2 nd minute until the 3 rd minute is finished, and snapshots are taken of the video data already drawn in the period from the initial time to the 3 rd minute.
When a user needs to review the video data at the 1.5 th minute, the first electronic whiteboard first finds the snapshot at the 1 st minute in the memory, then draws from the 1 st minute on the basis of the snapshot at the 1 st minute until the 1.5 th minute is drawn, and finally, the first electronic whiteboard continues to draw from the 1.5 th minute and displays the drawing result on the screen of the first electronic whiteboard.
When the user views the video with the duration of 3 minutes, the user clicks the pause button when viewing the 2.5 th minute, and at this time, after the first electronic whiteboard receives a pause request triggered by the user, the user can view all video data from the initial time to the 2.5 th minute in a page turning or up-down rolling mode.
It should be noted that, in the above method, when the first electronic whiteboard receives the playback request, the first electronic whiteboard performs drawing from the preset time on the basis of the snapshot of the preset time, instead of directly performing snapshot on the operation information from the initial time, for example, when the user needs to review the video data at the 2.5 minute, the time taken for the first electronic whiteboard to redraw from the 0 th minute is longer than the time taken for the first electronic whiteboard to redraw from the 2 nd minute, so it can be seen that the above electronic whiteboard playback method is beneficial to saving the drawing time and improving the playback efficiency.
For the sake of simplicity, only the playback method of the first electronic whiteboard when the operation information is sent from the second electronic whiteboard to the first electronic whiteboard is stated above, and actually, in the case that the operation information is obtained by directly triggering the user on the first electronic whiteboard, the playback method of the first electronic whiteboard is similar to the playback method of the first electronic whiteboard when the operation information is sent from the second electronic whiteboard to the first electronic whiteboard, and the detailed description is omitted here.
As shown in fig. 4, fig. 4 is a schematic structural diagram of electronic whiteboard 400 provided in the present application, including obtaining unit 410, determining unit 420, finding unit 430, and drawing unit 440, wherein,
an obtaining unit 410, configured to receive a playback request input by a user, where the playback request is used to instruct to resume playing from a first time;
a determining unit 420, configured to determine a first preset time corresponding to a first time according to the first time;
the searching unit 430 is configured to search a first snapshot according to a first preset time, where the first snapshot is a snapshot of the first electronic whiteboard performed on a first operation result at the first preset time, the first operation result is a result obtained by drawing the first electronic whiteboard according to first operation information, and the first operation information is operation information from an initial time to the first preset time;
the drawing unit 440 is configured to draw according to second operation information on the basis of the first snapshot, so as to obtain a second operation result, where the second operation information is operation information from a first preset time to a second time.
In this embodiment of the present application, the determining unit 420 is specifically configured to: determining the first preset time as the first time under the condition that the first time is any one of m preset times, wherein m is a positive integer; under the condition that the first time is not any one of m preset times, determining the first preset time as a preset time adjacent to the left of the first time; alternatively, the first and second electrodes may be,
determining a first preset time as a first time under the condition that the number of the operation information received at the first time is any one preset number of n preset numbers; when the number of the operation information received at the first time is not any one preset number of n preset numbers, and the number of the operation information received at the first time is larger than the first preset number and smaller than the second preset number, determining that the preset time corresponding to the first preset number is the first preset time, wherein n is a positive integer, the n preset numbers are arranged in a descending order, and the first preset number is adjacent to the second preset number.
In this embodiment of the present application, the electronic whiteboard further includes a snapshot unit 450, where the snapshot unit 450 is configured to: under the condition that the second moment is any one of m preset moments, the first electronic whiteboard carries out snapshot on the second operation result at the second moment so as to obtain a second snapshot; under the condition that the second moment is not any one of the m preset moments, the first electronic whiteboard carries out snapshot on the second operation result at the preset moment adjacent to the left of the second moment so as to obtain a second snapshot; alternatively, the first and second electrodes may be,
under the condition that the number of the operation information received at the second moment is any one preset number of n preset numbers, the first electronic whiteboard carries out snapshot on a second operation result at the second moment so as to obtain a second snapshot; and under the condition that the quantity of the operation information received at the second moment is not any one of the n preset quantities, and the quantity of the operation information received at the second moment is greater than a third preset quantity and less than a fourth preset quantity, carrying out snapshot on a second operation result according to the preset moment corresponding to the third preset quantity so as to obtain a second snapshot, wherein the third preset quantity is adjacent to the fourth preset quantity.
In this embodiment of the application, the first operation information and the second operation information are sent to the first electronic whiteboard by the second electronic whiteboard, or the first operation information and the second operation information are triggered by the user on the first electronic whiteboard.
In this embodiment of the application, when the first operation information and the second operation information are sent to the first electronic whiteboard by the second electronic whiteboard, before the first electronic whiteboard performs drawing according to the second operation information on the basis of the first snapshot, the drawing unit 440 is further configured to: determining the screen width and height of a first electronic whiteboard and the screen width and height of a second electronic whiteboard; establishing a proportional relation between the screen width and height of the first electronic whiteboard and the screen width and height of the second electronic whiteboard; and drawing the second operation information on the basis of the first snapshot according to the proportional relation.
In the electronic whiteboard, the first electronic whiteboard obtains the operation result by drawing the received operation information and carries out snapshot on the operation result at the preset time, so that when a user wants to check the operation result at the playback time, the user can directly start drawing from the snapshot at the preset time corresponding to the playback time instead of starting to draw again from the initial time, thereby saving the drawing time and improving the playback efficiency. Meanwhile, the method improves the resource utilization rate by storing the operation information, and greatly saves the storage space compared with the traditional method for storing the picture information. In addition, the display definition of the operation result obtained by the method is matched with the screen width and height of the first electronic whiteboard, so that the watching experience of a user is improved. Therefore, the electronic whiteboard can not only realize the switching and checking of the operation results, but also save the storage space and improve the playback efficiency and the comfort level of the user.
Referring to fig. 5, the present application provides a schematic structural diagram of an electronic whiteboard 500, including: processor 510, communication interface 520, and memory 530, where processor 510, communication interface 520, and memory 530 are coupled by bus 540. Wherein the content of the first and second substances,
the processor 510 may be a Central Processing Unit (CPU), a general purpose processor, a Digital Signal Processor (DSP), an application-specific integrated circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable Logic Device (PLD), a transistor logic device, a hardware component, or any combination thereof. The processor 510 described above may implement or perform various exemplary methods described in connection with the present disclosure. In particular, processor 510 reads program code stored in memory 530 and, in cooperation with communication interface 520, performs some or all of the steps of the method performed by electronic whiteboard 400 in the embodiments described above in the present application, e.g., steps S101-S105 shown in fig. 3.
The communication interface 520 may be a wired interface, such as an ethernet interface, a controller area network interface, a Local Interconnect Network (LIN) interface, and a FlexRay interface, or a wireless interface, such as a cellular network interface or a wireless lan interface, for communicating with other modules or devices. Specifically, the communication interface 520 is connected to the input/output device 550, and the input/output device 550 may include other terminal devices such as a computer and a projector.
The bus 540 may be a Controller Area Network (CAN) or other internal bus that enables interconnection between various systems or devices within the vehicle. The bus 540 may be divided into an address bus, a data bus, a control bus, and the like. For ease of illustration, only one thick line is shown, but this does not mean that there is only one bus or one type of bus.
It should be understood that electronic whiteboard 500 may contain more or fewer components than illustrated in fig. 5, or have a different arrangement of components.
The present application further provides a computer-readable storage medium storing a computer program, where the computer program is executed by hardware (for example, a processor, etc.) to perform part or all of the steps of any one of the methods performed by the electronic whiteboard in the embodiments of the present application.
Tests show that for the same video data with the duration of 10 minutes, the electronic whiteboard can reduce the occupancy rate of the storage space of the original video data by more than 96%. In addition, when the 720P video data is played on a 1080P screen, the image quality obtained by using the electronic whiteboard is clearer and free of noise, and switching among different whiteboard pages can be realized when a user clicks playback pause, so that the experience comfort of the user is improved.
In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the above computer program instructions are loaded and executed on a computer, the processes or functions described in the embodiments of the present application are wholly or partially generated. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by wire (e.g., coaxial cable, fiber optic, digital subscriber line) or wirelessly (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that includes one or more of the available media. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., compact disk), or a semiconductor medium (e.g., solid state disk), among others.
In the foregoing embodiments, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to related descriptions of other embodiments.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus may be implemented in other manners. For example, the above-described embodiments of the apparatus are merely illustrative, and for example, the above-described division of units is merely a logical division, and in actual implementation, there may be other divisions, for example, multiple units or components may be combined or may be integrated into another system, or some features may be omitted or not executed. In addition, the indirect coupling or direct coupling or communication connection between each other shown or discussed may be through some interfaces, indirect coupling or communication connection of devices or units, and may be electrical or in other forms.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the elements may be selected according to actual needs to achieve the purpose of the solution of the embodiments of the present application.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit may be stored in a computer-readable storage medium if it is implemented in the form of a software functional unit and sold or used as a separate product. Based on such understanding, the technical solution of the present application may be substantially implemented or contributed to by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage media may include, for example: u disk, removable hard disk, read only memory, random access memory, magnetic or optical disk, etc.
While the invention has been described with reference to specific embodiments, the scope of the invention is not limited thereto, and those skilled in the art can easily conceive various equivalent modifications or substitutions within the technical scope of the invention. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (11)
1. A playback method of an electronic whiteboard is applied to a first electronic whiteboard, and comprises the following steps:
the method comprises the steps that a first electronic whiteboard receives a playback request input by a user, wherein the playback request is used for indicating that the playing is resumed from a first moment;
the first electronic whiteboard determines a first preset moment corresponding to the first moment according to the first moment;
the first electronic whiteboard searches for a first snapshot according to the first preset time, wherein the first snapshot is a snapshot of the first electronic whiteboard at the first preset time on a first operation result, the first operation result is a result obtained by drawing the first electronic whiteboard according to first operation information, and the first operation information is operation information from an initial time to the first preset time;
and the first electronic whiteboard draws according to second operation information on the basis of the first snapshot so as to obtain a second operation result, wherein the second operation information is operation information from the first preset moment to the second moment.
2. The method according to claim 1, wherein the determining, by the first electronic whiteboard and according to the first time, a first preset time corresponding to the first time comprises:
determining the first preset time as the first time under the condition that the first time is any one of m preset times, wherein m is a positive integer;
determining that the first preset time is a preset time adjacent to the left of the first time under the condition that the first time is not any one of the m preset times; alternatively, the first and second electrodes may be,
determining the first preset time as the first time when the number of the operation information received at the first time is any one of n preset numbers;
and under the condition that the quantity of the operation information received at the first moment is not any one preset quantity in the n preset quantities, and the quantity of the operation information received at the first moment is greater than a first preset quantity and less than a second preset quantity, determining that the preset moment corresponding to the first preset quantity is the first preset moment, wherein n is a positive integer, the n preset quantities are arranged in a sequence from small to large, and the first preset quantity is adjacent to the second preset quantity.
3. The method of claim 2, comprising:
when the second moment is any one of the m preset moments, the first electronic whiteboard carries out snapshot on the second operation result at the second moment, so as to obtain a second snapshot;
under the condition that the second moment is not any one of the m preset moments, the first electronic whiteboard carries out snapshot on the second operation result at a preset moment adjacent to the left of the second moment, so as to obtain a second snapshot; alternatively, the first and second electrodes may be,
when the number of the operation information received at the second time is any one preset number of the n preset numbers, the first electronic whiteboard carries out snapshot on the second operation result at the second time, so as to obtain a second snapshot;
and under the condition that the quantity of the operation information received at the second moment is not any one preset quantity in the n preset quantities, and the quantity of the operation information received at the second moment is greater than a third preset quantity and less than a fourth preset quantity, carrying out snapshot on the second operation result according to the preset moment corresponding to the third preset quantity so as to obtain the second snapshot, wherein the third preset quantity is adjacent to the fourth preset quantity.
4. A method according to any one of claims 1 to 3, wherein the first operational information and the second operational information are sent to the first electronic whiteboard by a second electronic whiteboard, or are triggered by a user on the first electronic whiteboard.
5. The method according to claim 4, wherein in a case where the first operation information and the second operation information are sent to the first electronic whiteboard for the second electronic whiteboard, before the first electronic whiteboard performs drawing according to the second operation information on the basis of the first snapshot, the method further comprises:
determining the screen width height of the first electronic whiteboard and the screen width height of the second electronic whiteboard;
establishing a proportional relation between the screen width and height of the first electronic whiteboard and the screen width and height of the second electronic whiteboard;
and drawing the second operation information on the basis of the first snapshot according to the proportional relation.
6. An electronic whiteboard, comprising:
the device comprises an acquisition unit, a playback unit and a control unit, wherein the acquisition unit is used for receiving a playback request input by a user, and the playback request is used for indicating that the playback is started from a first moment;
the determining unit is used for determining a first preset time corresponding to the first time according to the first time;
the searching unit is configured to search a first snapshot according to the first preset time, where the first snapshot is a snapshot of a first operation result performed by the first electronic whiteboard at the first preset time, the first operation result is a result obtained by drawing the first electronic whiteboard according to first operation information, and the first operation information is operation information from an initial time to the first preset time;
and the drawing unit is used for drawing according to second operation information on the basis of the first snapshot so as to obtain a second operation result, wherein the second operation information is operation information from the first preset time to the second time.
7. The electronic whiteboard of claim 6, wherein the determining unit is specifically configured to:
determining the first preset time as the first time under the condition that the first time is any one of m preset times, wherein m is a positive integer;
determining that the first preset time is a preset time adjacent to the left of the first time under the condition that the first time is not any one of the m preset times; alternatively, the first and second electrodes may be,
determining the first preset time as the first time when the number of the operation information received at the first time is any one of n preset numbers;
and under the condition that the quantity of the operation information received at the first moment is not any one preset quantity in the n preset quantities, and the quantity of the operation information received at the first moment is greater than a first preset quantity and less than a second preset quantity, determining that the preset moment corresponding to the first preset quantity is the first preset moment, wherein n is a positive integer, the n preset quantities are arranged in a sequence from small to large, and the first preset quantity is adjacent to the second preset quantity.
8. The electronic whiteboard of claim 7, further comprising a snapshot unit configured to:
when the second moment is any one of the m preset moments, the first electronic whiteboard carries out snapshot on the second operation result at the second moment, so as to obtain a second snapshot;
under the condition that the second moment is not any one of the m preset moments, the first electronic whiteboard carries out snapshot on the second operation result at a preset moment adjacent to the left of the second moment, so as to obtain a second snapshot; alternatively, the first and second electrodes may be,
when the number of the operation information received at the second time is any one preset number of the n preset numbers, the first electronic whiteboard carries out snapshot on the second operation result at the second time, so as to obtain a second snapshot;
and under the condition that the quantity of the operation information received at the second moment is not any one preset quantity in the n preset quantities, and the quantity of the operation information received at the second moment is greater than a third preset quantity and less than a fourth preset quantity, carrying out snapshot on the second operation result according to the preset moment corresponding to the third preset quantity so as to obtain the second snapshot, wherein the third preset quantity is adjacent to the fourth preset quantity.
9. An electronic whiteboard according to any one of claims 6 to 8, wherein the first operation information and the second operation information are sent to the first electronic whiteboard by the second electronic whiteboard, or are triggered by a user on the first electronic whiteboard.
10. The electronic whiteboard of claim 9, wherein in a case that the first operation information and the second operation information are sent to the first electronic whiteboard by the second electronic whiteboard, before the first electronic whiteboard performs drawing according to the second operation information on the basis of the first snapshot, the drawing unit is further configured to:
determining the screen width height of the first electronic whiteboard and the screen width height of the second electronic whiteboard;
establishing a proportional relation between the screen width and height of the first electronic whiteboard and the screen width and height of the second electronic whiteboard;
and drawing the second operation information on the basis of the first snapshot according to the proportional relation.
11. An electronic whiteboard, comprising: a processor, a communication interface, and a memory; the memory is used for storing instructions, the processor is used for executing the instructions, and the communication interface is used for communicating with other devices under the control of the processor, wherein the processor executes the instructions to realize the method of any one of claims 1 to 5.
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| CN111497497A (en) * | 2020-04-23 | 2020-08-07 | 珠海市络奥科技有限公司 | Interconnected blackboard with playback function and system thereof |
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