CN113259705A - Method and device for recording and synthesizing video - Google Patents
Method and device for recording and synthesizing video Download PDFInfo
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- CN113259705A CN113259705A CN202110689017.2A CN202110689017A CN113259705A CN 113259705 A CN113259705 A CN 113259705A CN 202110689017 A CN202110689017 A CN 202110689017A CN 113259705 A CN113259705 A CN 113259705A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/21—Server components or server architectures
- H04N21/218—Source of audio or video content, e.g. local disk arrays
- H04N21/2187—Live feed
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/231—Content storage operation, e.g. caching movies for short term storage, replicating data over plural servers, prioritizing data for deletion
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/234—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs
- H04N21/23424—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs involving splicing one content stream with another content stream, e.g. for inserting or substituting an advertisement
Abstract
The application relates to a method for recording and synthesizing video, which comprises the following steps: capturing action information aiming at the operation of a presentation document in the live broadcast recording process; generating a plurality of document operation video files for displaying the presentation document operation based on the action information; recording document operation video file description information related to the plurality of document operation video files; and splicing the plurality of document operation video files into a document demonstration video file according to the document operation video file description information. The application also provides a device for recording and synthesizing the video, an electronic device and a non-transient computer storage medium. The method and the device can effectively record the demonstration document information in the live broadcast process, convert the demonstration document information into the video stream information, solve the problems of precipitation and migration of the demonstration document information, enable the combined demonstration document and the video in the live broadcast process to have good watching experience, and enable the presentation form of the combined video to be more flexible.
Description
Technical Field
The present application relates to the field of audio and video recording and synthesis, and in particular, to a method and an apparatus for recording and synthesizing a video.
Background
At present, in scenes such as education live broadcast, enterprise training live broadcast and the like, document demonstration and audio and video live broadcast are generally needed, and therefore the live broadcast effect can be better guaranteed. Taking a three-split screen layout as an example, the three-split screen layout is mainly characterized in that a lecturer head portrait is separated from a presentation document (such as PPT), and the lecturer head portrait is collected by a camera and presented in a video stream mode; the demonstration document is transmitted in a data flow mode to display each page of the courseware.
Many platforms can download playback videos for subsequent use after live broadcast, but only resources can be acquired from video streams during local download, namely, only instructor videos can be acquired, presentation document data cannot be downloaded and presented together, most presentation documents need to be loaded and presented through a browser, and live broadcast course contents can only be played back on certain specific platforms and cannot be deposited and migrated.
Disclosure of Invention
In order to solve the problems in the prior art, the application provides a scheme for recording and synthesizing videos, which records the demonstration document information in the live broadcast process, fuses the demonstration document process into the live broadcast playback video, ensures the synchronization of the demonstration document information and the video stream information, efficiently generates video files based on various layouts of the live broadcast playback, and reduces the resource consumption.
According to a first aspect of the present invention, there is provided a method of recording and composing a video, comprising:
capturing action information aiming at the operation of a presentation document in the live broadcast recording process;
generating a plurality of document operation video files for displaying the presentation document operation based on the action information;
recording document operation video file description information related to the plurality of document operation video files; and
and splicing the plurality of document operation video files into a document demonstration video file according to the description information of the document operation video file.
According to a second aspect of the present invention, there is provided an apparatus for recording and composing video, comprising:
the capturing unit is used for capturing action information aiming at the operation of the presentation document in the live broadcast recording process;
a generating unit configured to generate a plurality of document operation video files displaying a presentation document operation based on the action information;
a recording unit configured to record document operation video file description information related to the plurality of document operation video files; and
and the splicing unit is used for splicing the plurality of document operation video files into a document demonstration video file according to the document operation video file description information.
According to a third aspect of the present invention, there is provided an electronic apparatus comprising:
a processor; and
a memory storing computer instructions which, when executed by the processor, cause the processor to perform the method of the first aspect.
According to a fourth aspect of the present invention, there is provided a non-transitory computer storage medium storing a computer program which, when executed by a plurality of processors, causes the processors to perform the method of the first aspect.
According to the method, the device, the electronic equipment and the non-transient computer storage medium for recording and synthesizing the video, the demonstration document information in the live broadcast process can be effectively recorded, the demonstration document information is converted into the video stream information, and the problems of precipitation and migration of the demonstration document information are solved; the video stream information of the presentation document is merged with the video in the live broadcasting process, so that the synchronization of the video stream information of the presentation document and the video in the live broadcasting process is ensured, and the merged presentation document and the video in the live broadcasting process have good watching experience; in addition, the layout of the video stream information of the presentation document and the video in the live broadcast process can be set and adjusted in the process of combining the video stream information and the video in the live broadcast process, so that the presentation form of the combined video is more flexible.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only 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 exceeding the protection scope of the present application.
Fig. 1 is a flowchart of a method of recording and composing a video according to an embodiment of the present invention.
FIG. 2 is a schematic diagram of generating a plurality of document operation video files displaying a presentation document operation.
Fig. 3 is a schematic diagram of splicing a plurality of document operation video files into a document presentation video file according to an embodiment of the present invention.
Fig. 4 is a schematic diagram of an apparatus for recording and synthesizing video according to an embodiment of the present invention.
Fig. 5 is a structural diagram of an electronic device provided by the present invention.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
According to one aspect of the present invention, a method of recording and composing video is provided. Fig. 1 is a flowchart of a method of recording and composing a video according to an embodiment of the present invention. As shown in fig. 1, the method includes the following steps.
Step S101, capturing action information aiming at the operation of the presentation document in the live recording process.
In a specific embodiment, the playback data is generated by recording after the live event is ended, and the playback data includes playback video files (e.g., videos of the avatar of the instructor) and action information of operations on the presentation documents generated by operating the presentation documents (e.g., turning pages of the document, animation, painting brushes, drawing boards, a mouse, etc.) in the live event. The action information includes, among other things, page turning of the presentation document, animation in the presentation document, and manipulation of the presentation document with brushes and/or drawing board tools.
Step S102, based on the action information, generating a plurality of document operation video files for displaying the demonstration document operation.
In one embodiment, the presentation document is generally a document player presentation loaded based on a browser, a corresponding presentation flow is executed by calling a document player built-in method, and a recording tool is used to record a document presentation process to generate a corresponding playback video clip of the presentation document. FIG. 2 is a schematic diagram of generating a plurality of document operation video files displaying a presentation document operation. As shown in fig. 2, in a Linux operating system environment, a virtual X server graphical running interface is provided for a browser application by installing and starting a virtual graphics framework service; starting a browser program of a virtual graphical interface, loading a corresponding browser recording plug-in, capturing a visible area of a current active tab page through the plug-in, and calling a MediaRecorder API (hypertext Markup Language 5, hypertext Markup Language 5.0) standard of HTML5 by using the plug-in to record the visible area. The browser plug-in generates a plurality of video files of the presentation document operation in the recording process, which are called document operation video files. These document operations video files record a number of operations on the presentation file, such as flipping pages of the presentation file, animation in the presentation file, tagging the presentation file with a brush, and the like.
Step S103, recording the description information of the document operation video files related to the plurality of document operation video files.
In the process of generating a plurality of document operation video files for displaying the presentation document operation, the information related to the document operation video files is recorded, and the information comprises the storage path, the relative initial playing time and the playing duration of each document operation video file.
For example, 100 document operation video files showing a presentation document operation are generated, the 1 st document operation video file is stored in an MP4 file of doc _1600407666431.MP4, the relative start play time is 2396ms, the play duration is 58000ms, the 2 nd document operation video file is stored in an MP4 file of doc _1600407666432.MP4, the relative start play time is 74600ms, the play duration is 25000ms, and so on.
And step S104, splicing the plurality of document operation video files into a document demonstration video file according to the description information of the document operation video file.
The document operation video file description information can be used as a basis for splicing a plurality of document operation video files. Fig. 3 is a schematic diagram of splicing a plurality of document operation video files into a document presentation video file according to an embodiment of the present invention. As shown in fig. 3, the play start time of the 1 st frame of the first document operation video file is the relative start play time of the first document operation video file, the last frame of the first document operation video file is reached after the play duration of the first document operation video file, and the last frame of the first document operation video file is displayed in a still frame before the play start time of the 1 st frame of the second document operation video file is reached; the starting playing time of the 1 st frame of the second document operation video file is the relative starting playing time of the second document operation video file, the last frame of the second document operation video file is reached after the playing duration of the second document operation video file, the last frame of the second document operation video file is displayed in a static frame before the starting playing time of the 1 st frame of the third document operation video file is reached, and the like until the last frame of the last document operation video file is reached, and the formed video file is called a document demonstration video file. In this way, the splicing of a plurality of document operation video files into a document presentation video file is completed.
To obtain a viewing experience similar to that of a live process, video streaming information of a presentation document may be merged with the video of the live process. Thus, the method for recording and synthesizing video further comprises the following steps.
And step S105, acquiring a live video file.
And step S106, combining the live video file and the document demonstration video file into one file.
The obtained live video file is a video which is movably played with the presentation document in the live broadcasting process, and for example, the live video file can be an avatar video of a lecturer in the course of a lecture. In the process of combining the live video file and the document demonstration video file into one file, the synchronization of the document demonstration video file and the live video file is ensured at first. In the description information of the document operation video files related to the plurality of document operation video files, the relative initial playing time of each document operation video file is recorded, and the synchronization of the document demonstration video file and the live video file can be ensured.
Meanwhile, in the process of merging the live video file and the document demonstration video file into one file, some synthesis parameters can be set, and the synthesis parameters comprise display layout mode parameters for describing the live video file and the document demonstration video file, such as layout modes of sampling three-split screen, pure document, picture-in-picture and the like, so that the presentation form of the merged video is more flexible.
In addition, in the process of merging the live video file and the document demonstration video file into one file, other pictures or video files, the live video file and the document demonstration video file can be merged into one file together, and display layout mode parameters for describing the other pictures or video files, the live video file and the document demonstration video file can be set in the process. Thus, step S106 includes merging the live video file and the document presentation video file into one file according to the composition parameters.
In addition, in order to merge a live video file and a document presentation video file into one file, it is generally necessary to convert the file format of the live video file into a file format consistent with that of the document presentation video file. For example, Live video files are typically in HLS (HTTP Live Streaming, HTTP-based adaptive code rate Streaming) format, and the file format of a document presentation video file is set to MP4 format, then the Live video file needs to be converted from HLS format to MP4 format. In this way, the method for recording and synthesizing the video further includes converting the file format of the live video file into the same file format as the file format of the document demonstration video file, that is, converting the file format of the live video file into the same file format as the file format of the plurality of document operation video files.
According to the method for recording and synthesizing the video, the demonstration document information in the live broadcast process can be effectively recorded, the demonstration document information is converted into the video stream information, and the problems of precipitation and migration of the demonstration document information are solved; the video stream information of the presentation document is merged with the video in the live broadcasting process, so that the synchronization of the video stream information of the presentation document and the video in the live broadcasting process is ensured, and the merged presentation document and the video in the live broadcasting process have good watching experience; in addition, the layout of the video stream information of the presentation document and the video in the live broadcast process can be set and adjusted in the process of combining the video stream information and the video in the live broadcast process, so that the presentation form of the combined video is more flexible.
According to another aspect of the present invention, an apparatus for recording and composing video is provided. Fig. 4 is a schematic diagram of an apparatus for recording and synthesizing video according to an embodiment of the present invention. As shown in fig. 4, the apparatus includes the following units.
The capturing unit 401 is configured to capture action information of an operation on a presentation document during a live recording process.
In a specific embodiment, the playback data is generated by recording after the live event is ended, and the playback data includes playback video files (e.g., videos of the avatar of the instructor) and action information of operations on the presentation documents generated by operating the presentation documents (e.g., turning pages of the document, animation, painting brushes, drawing boards, a mouse, etc.) in the live event. The action information includes, among other things, page turning of the presentation document, animation in the presentation document, and manipulation of the presentation document with brushes and/or drawing board tools.
A generating unit 402 for generating a plurality of document operation video files displaying a presentation document operation based on the motion information.
In one embodiment, the presentation document is generally a document player presentation loaded based on a browser, a corresponding presentation flow is executed by calling a document player built-in method, and a recording tool is used to record a document presentation process to generate a corresponding playback video clip of the presentation document. FIG. 2 is a schematic diagram of generating a plurality of document operation video files displaying a presentation document operation. As shown in fig. 2, in a Linux operating system environment, a virtual X server graphical running interface is provided for a browser application by installing and starting a virtual graphics framework service; starting a browser program of a virtual graphical interface, loading a corresponding browser recording plug-in, capturing a visible area of a current active tab page through the plug-in, and calling a MediaRecorder API (hypertext Markup Language 5, hypertext Markup Language 5.0) standard of HTML5 by using the plug-in to record the visible area. The browser plug-in generates a plurality of video files of the presentation document operation in the recording process, which are called document operation video files. These document operations video files record a number of operations on the presentation file, such as flipping pages of the presentation file, animation in the presentation file, tagging the presentation file with a brush, and the like.
A recording unit 403 for recording document operation video file description information related to the plurality of document operation video files.
In the process of generating a plurality of document operation video files for displaying the presentation document operation, the information related to the document operation video files is recorded, and the information comprises the storage path, the relative initial playing time and the playing duration of each document operation video file.
For example, 100 document operation video files showing a presentation document operation are generated, the 1 st document operation video file is stored in an MP4 file of doc _1600407666431.MP4, the relative start play time is 2396ms, the play duration is 58000ms, the 2 nd document operation video file is stored in an MP4 file of doc _1600407666432.MP4, the relative start play time is 74600ms, the play duration is 25000ms, and so on.
A splicing unit 404, configured to splice the multiple document operation video files into a document presentation video file according to the document operation video file description information.
The document operation video file description information can be used as a basis for splicing a plurality of document operation video files. Fig. 3 is a schematic diagram of splicing a plurality of document operation video files into a document presentation video file according to an embodiment of the present invention. As shown in fig. 3, the play start time of the 1 st frame of the first document operation video file is the relative start play time of the first document operation video file, the last frame of the first document operation video file is reached after the play duration of the first document operation video file, and the last frame of the first document operation video file is displayed in a still frame before the play start time of the 1 st frame of the second document operation video file is reached; the starting playing time of the 1 st frame of the second document operation video file is the relative starting playing time of the second document operation video file, the last frame of the second document operation video file is reached after the playing duration of the second document operation video file, the last frame of the second document operation video file is displayed in a static frame before the starting playing time of the 1 st frame of the third document operation video file is reached, and the like until the last frame of the last document operation video file is reached, and the formed video file is called a document demonstration video file. In this way, the splicing of a plurality of document operation video files into a document presentation video file is completed.
To obtain a viewing experience similar to that of a live process, video streaming information of a presentation document may be merged with the video of the live process. Thus, the device for recording and synthesizing video further comprises the following units.
An obtaining unit 405 is configured to obtain a live video file.
A merging unit 406, configured to merge the live video file and the document presentation video file into one file.
The obtained live video file is a video which is movably played with the presentation document in the live broadcasting process, and for example, the live video file can be an avatar video of a lecturer in the course of a lecture. In the process of combining the live video file and the document demonstration video file into one file, the synchronization of the document demonstration video file and the live video file is ensured at first. In the description information of the document operation video files related to the plurality of document operation video files, the relative initial playing time of each document operation video file is recorded, and the synchronization of the document demonstration video file and the live video file can be ensured.
Meanwhile, in the process of merging the live video file and the document demonstration video file into one file, some synthesis parameters can be set, and the synthesis parameters comprise display layout mode parameters for describing the live video file and the document demonstration video file, such as layout modes of sampling three-split screen, pure document, picture-in-picture and the like, so that the presentation form of the merged video is more flexible.
In addition, in the process of merging the live video file and the document demonstration video file into one file, other pictures or video files, the live video file and the document demonstration video file can be merged into one file together, and display layout mode parameters for describing the other pictures or video files, the live video file and the document demonstration video file can be set in the process. Thus, the merging unit 406 comprises a merging subunit for merging the live video file and the document presentation video file into one file according to the composition parameters.
In addition, in order to merge a live video file and a document presentation video file into one file, it is generally necessary to convert the file format of the live video file into a file format consistent with that of the document presentation video file. For example, Live video files are typically in HLS (HTTP Live Streaming, HTTP-based adaptive code rate Streaming) format, and the file format of a document presentation video file is set to MP4 format, then the Live video file needs to be converted from HLS format to MP4 format. In this way, the above apparatus for recording and synthesizing video further comprises a format conversion unit, configured to convert the file format of the live video file into the same file format as the file format of the document presentation video file, that is, convert the file format of the live video file into the same file format as the file format of the plurality of document operation video files.
According to the video recording and synthesizing device provided by the invention, the demonstration document information in the live broadcast process can be effectively recorded, the demonstration document information is converted into the video stream information, and the problems of precipitation and migration of the demonstration document information are solved; the video stream information of the presentation document is merged with the video in the live broadcasting process, so that the synchronization of the video stream information of the presentation document and the video in the live broadcasting process is ensured, and the merged presentation document and the video in the live broadcasting process have good watching experience; in addition, the layout of the video stream information of the presentation document and the video in the live broadcast process can be set and adjusted in the process of combining the video stream information and the video in the live broadcast process, so that the presentation form of the combined video is more flexible.
Referring to fig. 5, fig. 5 provides an electronic device comprising a processor; and a memory storing computer instructions which, when executed by the processor, cause the processor to carry out the method and refinement scheme as shown in figure 1 when executing the computer instructions.
It should be understood that the above-described device embodiments are merely exemplary, and that the devices disclosed herein may be implemented in other ways. For example, the division of the units/modules in the above embodiments is only one logical function division, and there may be another division manner in actual implementation. For example, multiple units, modules, or components may be combined, or may be integrated into another system, or some features may be omitted, or not implemented.
In addition, unless otherwise specified, each functional unit/module in each embodiment of the present invention may be integrated into one unit/module, each unit/module may exist alone physically, or two or more units/modules may be integrated together. The integrated units/modules may be implemented in the form of hardware or software program modules.
If the integrated unit/module is implemented in hardware, the hardware may be digital circuits, analog circuits, etc. Physical implementations of hardware structures include, but are not limited to, transistors, memristors, and the like. The processor or chip may be any suitable hardware processor, such as a CPU, GPU, FPGA, DSP, ASIC, etc., unless otherwise specified. Unless otherwise specified, the on-chip cache, the off-chip Memory, and the Memory may be any suitable magnetic storage medium or magneto-optical storage medium, such as resistive Random Access Memory rram (resistive Random Access Memory), Dynamic Random Access Memory dram (Dynamic Random Access Memory), Static Random Access Memory SRAM (Static Random-Access Memory), enhanced Dynamic Random Access Memory edram (enhanced Dynamic Random Access Memory), High-Bandwidth Memory HBM (High-Bandwidth Memory), hybrid Memory cubic hmc (hybrid Memory cube), and so on.
The integrated units/modules, if implemented in the form of software program modules and sold or used as a stand-alone product, may be stored in a computer readable memory. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a memory and includes several 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 disclosure. And the aforementioned memory comprises: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.
Embodiments of the present application also provide a non-transitory computer storage medium storing a computer program, which when executed by a plurality of processors causes the processors to perform the method and refinement scheme as shown in fig. 1.
The foregoing detailed description of the embodiments of the present application has been presented to illustrate the principles and implementations of the present application, and the description of the embodiments is only intended to facilitate the understanding of the methods and their core concepts of the present application. Meanwhile, a person skilled in the art should, according to the idea of the present application, change or modify the embodiments and applications of the present application based on the scope of the present application. In view of the above, the description should not be taken as limiting the application.
Claims (14)
1. A method of recording and composing video, comprising:
capturing action information aiming at the operation of a presentation document in the live broadcast recording process;
generating a plurality of document operation video files for displaying the presentation document operation based on the action information;
recording document operation video file description information related to the plurality of document operation video files; and
and splicing the plurality of document operation video files into a document demonstration video file according to the description information of the document operation video file.
2. The method of claim 1, wherein the action information includes page flipping of the presentation document, animation in the presentation document, and manipulation of the presentation document with brushes and/or sketchpads.
3. The method of claim 1, wherein the document operation video file description information includes a storage path, a relative start play time, and a play duration for each of the plurality of document operation video files.
4. The method of claim 1, further comprising:
acquiring a live video file;
and merging the live video file and the document demonstration video file into one file.
5. The method of claim 4, wherein said merging the live video file and the document presentation video file into one file comprises: and merging the live video file and the document demonstration video file into one file according to synthesis parameters, wherein the synthesis parameters comprise display layout mode parameters describing the live video file and the document demonstration video file.
6. The method of claim 4 or 5, further comprising: converting the file format of the live video file to be the same as the file formats of the plurality of document operation video files, wherein the file formats of the plurality of document operation video files include an MP4 format.
7. An apparatus for recording and composing video, comprising:
the capturing unit is used for capturing action information aiming at the operation of the presentation document in the live broadcast recording process;
a generating unit configured to generate a plurality of document operation video files displaying a presentation document operation based on the action information;
a recording unit configured to record document operation video file description information related to the plurality of document operation video files; and
and the splicing unit is used for splicing the plurality of document operation video files into a document demonstration video file according to the document operation video file description information.
8. The apparatus of claim 7, wherein the action information comprises page turns of the presentation document, animations in the presentation document, and operations on the presentation document with paintbrush and/or sketchpad tools.
9. The apparatus of claim 7, wherein the document operation video file description information includes a storage path, a relative start play time, and a play duration for each of the plurality of document operation video files.
10. The apparatus of claim 7, further comprising:
the acquisition unit is used for acquiring a live video file;
and the merging unit is used for merging the live video file and the document demonstration video file into one file.
11. The apparatus of claim 10, wherein the merging unit comprises:
and the merging subunit is used for merging the live video file and the document demonstration video file into one file according to the synthesis parameters, wherein the synthesis parameters comprise display layout mode parameters describing the live video file and the document demonstration video file.
12. The apparatus of claim 10 or 11, further comprising:
and the format conversion unit is used for converting the file format of the live video file into the same file format as the file formats of the plurality of document operation video files, wherein the file formats of the plurality of document operation video files comprise an MP4 format.
13. An electronic device, comprising:
a processor; and
a memory storing computer instructions that, when executed by the processor, cause the processor to perform the method of any of claims 1-6.
14. A non-transitory computer storage medium storing a computer program that, when executed by a plurality of processors, causes the processors to perform the method of any one of claims 1-6.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113938619A (en) * | 2021-10-28 | 2022-01-14 | 稿定（厦门）科技有限公司 | Video synthesis method, system and storage device based on browser |
| CN114979553A (en) * | 2022-05-23 | 2022-08-30 | 北京美迪康信息咨询有限公司 | Live conference material calling method based on schedule |
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