CN112423090A - Video watermark automatic covering method, device, equipment and storage medium - Google Patents
Video watermark automatic covering method, device, equipment and storage medium Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 56
- 230000008569 process Effects 0.000 claims abstract description 14
- 238000004590 computer program Methods 0.000 claims description 13
- 230000002776 aggregation Effects 0.000 description 7
- 238000004220 aggregation Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 230000006870 function Effects 0.000 description 4
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/431—Generation of visual interfaces for content selection or interaction; Content or additional data rendering
- H04N21/4318—Generation of visual interfaces for content selection or interaction; Content or additional data rendering by altering the content in the rendering process, e.g. blanking, blurring or masking an image region
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs
- H04N21/4402—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/45—Management operations performed by the client for facilitating the reception of or the interaction with the content or administrating data related to the end-user or to the client device itself, e.g. learning user preferences for recommending movies, resolving scheduling conflicts
- H04N21/454—Content or additional data filtering, e.g. blocking advertisements
- H04N21/4545—Input to filtering algorithms, e.g. filtering a region of the image
- H04N21/45455—Input to filtering algorithms, e.g. filtering a region of the image applied to a region of the image
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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]
- H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
- H04N21/83—Generation or processing of protective or descriptive data associated with content; Content structuring
- H04N21/835—Generation of protective data, e.g. certificates
- H04N21/8358—Generation of protective data, e.g. certificates involving watermark
Abstract
The invention relates to the technical field of video correlation, in particular to a method, a device, equipment and a storage medium for automatically covering a video watermark. The automatic video watermark covering method comprises the following steps: acquiring information of a video to be played; based on the information, determining the target position needing to be subjected to watermark covering and a watermark picture used in the shielding process; and playing the video while shielding the target position through the watermark picture. Therefore, the logo watermark is directly shielded during playing, so that when the video is played, the logo watermark is covered by the watermark picture displayed by the client, the video player meets the current auditing regulation, meanwhile, the video is not required to be decoded, the watermark picture is added after the video is decoded and disassembled, the video is resynthesized, and other operations consume less time, the video size cannot be increased, and the content delay is reduced.
Description
Technical Field
The invention relates to the technical field of video correlation, in particular to a method, a device, equipment and a storage medium for automatically covering a video watermark.
Background
At present, a TV large-screen application content provider (namely CP) in the OTT industry can paste platform LOGO watermarks according to the properties of a platform per se, such as a search fox and a watermelon video. Due to the requirement of the OTT license plate party on content verification, the CP video content with the LOGO with the platform property (such as the video with LOGO watermark of fox and watermelon) is limited to be put on shelf in other applications. This brings difficulty to other video aggregation applications to show multiple videos. For aggregated large-screen applications, a large batch of videos on the CP side cannot be directly put on shelf for use, so that the LOGO watermark of the CP video is urgently needed to be processed.
At present, the mainstream watermark processing method in the market is to add a watermark picture one by one frame to a video picture to cover a logo watermark when cloud transcoding is adopted, namely, a video is uploaded, decoded and disassembled, the watermark picture is added, and the video is synthesized again and output. However, by adopting a cloud processing mode, after videos with the same definition are processed, the size of the videos is increased (the size is increased 1/3), transcoding of the videos is required (time consumption is required), efficiency in video processing and on-shelf is not high, and delay of contents with even properties, such as entertainment contents, information contents and the like, is high, so that services are seriously influenced.
Disclosure of Invention
In view of the above, a method, an apparatus, a device and a storage medium for automatically covering a video watermark are provided to solve the problems in the related art.
The invention adopts the following technical scheme:
in a first aspect, an embodiment of the present invention provides an automatic video watermark hiding method, where the method includes:
acquiring information of a video to be played;
based on the information, determining the target position needing to be subjected to watermark covering and a watermark picture used in the shielding process;
and playing the video while shielding the target position through the watermark picture.
Optionally, the information at least includes: the definition of the video to be played and the content provider of the video to be played.
Optionally, the determining, based on the information, a target position to be covered by the watermark and a watermark picture used when the target position is covered by the watermark includes:
based on the information of the video to be played, a preset watermark template is inquired, and the height, width, position and watermark covering offset of the watermark picture to be used and the logo watermark to be covered are determined.
Optionally, the playing the video while the target position is shielded by the watermark picture includes:
determining the unfolding position of the watermark picture according to the position and the watermark covering offset;
and unfolding the picture and the unfolding position, and simultaneously playing the video to be played so as to cover the logo watermark.
Optionally, the determining the expansion position of the watermark picture according to the position and the watermark covering offset includes:
acquiring all edges in the video to be played, acquiring a uniform border edge, and capturing a first frame image to obtain a screenshot with a widened edge;
converting the screenshot into a binary image, and determining a covered position area by using an OTSU algorithm;
on the basis of the binary image, the vertical and horizontal specific coordinate positions to be covered by the watermark picture are calculated by utilizing a sobel operator.
Optionally, the video to be played provided by the same provider with the same definition corresponds to a preset watermark picture.
Optionally, when the video to be played is switched, the watermark picture and the covering position used by the covering need to be determined again.
In a second aspect, an embodiment of the present application further provides an automatic video watermark hiding device, including:
the acquisition module is used for acquiring the information of the video to be played;
the determining module is used for determining a target position needing to be covered by the watermark and a watermark picture used in the shielding process based on the information;
and the shielding module is used for playing the video while shielding the target position through the watermark picture.
In a third aspect, an embodiment of the present application further provides an automatic video watermark covering device, which includes:
a processor, and a memory coupled to the processor;
the memory is configured to store a computer program for performing at least the video watermark automatic masking method according to the first aspect of the present application;
the processor is used for calling and executing the computer program in the memory.
In a fourth aspect, an embodiment of the present application further provides a storage medium, where the storage medium stores a computer program, and when the computer program is executed by a processor, the method implements the steps in the automatic video watermark hiding method according to the first aspect of the present application.
By adopting the technical scheme, the original video does not need to be modified, and the following steps are only executed when the video needs to be played: acquiring information of a video to be played; based on the information, determining the target position needing to be subjected to watermark covering and a watermark picture used in the shielding process; and playing the video while shielding the target position through the watermark picture. Therefore, the logo watermark is directly shielded during playing, so that when the video is played, the logo watermark is covered by the watermark picture displayed by the client, the video player meets the current auditing regulation, meanwhile, the video is not required to be decoded, the watermark picture is added after the video is decoded and disassembled, the video is resynthesized, and other operations consume less time, the video size cannot be increased, and the content delay is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a flowchart of an automatic video watermark hiding method according to an embodiment of the present invention;
fig. 2 is a flowchart of an automatic video watermark hiding method according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of an automatic video watermark covering apparatus according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of an automatic video watermark hiding device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
Firstly, an application scenario of the embodiment of the invention is explained, and at present, a mainstream watermark processing method in the market is to add watermark pictures to video pictures frame by frame when cloud transcoding is adopted, namely, the video is uploaded, decoded, the video is disassembled to add the watermark pictures, and the video is synthesized again and output. However, by adopting a cloud processing mode, after videos with the same definition are processed, the size of the videos is increased (the size is increased 1/3), transcoding of the videos is required (time consumption is required), efficiency in video processing and on-shelf is not high, and delay of contents with even properties, such as entertainment contents, information contents and the like, is high, so that services are seriously influenced. The present application proposes a corresponding solution based on this problem.
Examples
Fig. 1 is a flowchart of an automatic video watermark hiding method according to an embodiment of the present invention, which can be executed by an automatic video watermark hiding apparatus according to an embodiment of the present invention. Referring to fig. 1, the method may specifically include the following steps:
s101, acquiring information of a video to be played;
wherein the information at least comprises: the definition of the video to be played and the content provider of the video to be played.
It should be noted that, the video aggregation application generally needs to store information of a video when acquiring the video, so that information that a client searches and detects the video to be played currently by a user in data provided by the aggregation application is stored, and can acquire the definition of the current video, and a CP (content provider) to which the client belongs requests whether the background current video needs to be subjected to watermark covering or not.
S102, determining a target position needing to be subjected to watermark covering and a watermark picture used in the shielding process based on the information;
it should be noted that step S102 is generally executed by the background of the playback device, and the background queries the definition watermark template corresponding to the current video according to the information returned by the client, and returns the logo watermark to be covered by the current video, the picture height and width, the position (upper left, upper right, lower left, lower right) of the logo watermark, the watermark picture used during the occlusion, and the watermark picture covering offset (horizontal and vertical offset) to the client.
S103, the video is played while the target position is shielded by the watermark picture.
Specifically, the unfolding position of the watermark picture is determined according to the position and the watermark covering offset;
and unfolding the picture and the unfolding position, and simultaneously playing the video to be played so as to cover the original watermark.
So set up: the logo watermark is directly shielded during playing, so that the logo watermark is covered by the watermark picture displayed by the client when the video is played, the video playing meets the current auditing regulation, meanwhile, the video is not required to be decoded, the watermark picture is added after the video is decoded and disassembled, the video is resynthesized, and other operations are less in time consumption, the video size cannot be increased, and the content delay is reduced.
In practical application, the function implementation flow of each key system is as follows:
the client detection process comprises the following steps:
1) the client provides a separate watermark picture covering interface for providing a client call, and the interface field comprises: id, watermark name, cpCode (content provider identifier), watermark image (watermark picture address), width, height, watermark area, definition, vertical offset, horizontal offset, and the like.
2) And the client acquires the watermark covering image by reporting the cpCode of the current video of the video.
Second, presetting process of watermark templates with different definition
1) Setting the definition of the template: 480P, 720P, 1080P
2) Selecting CP (content provider) to be covered
3) Determining the watermark picture, wherein it needs to be noted that the video to be played provided by the same provider with the same definition corresponds to a preset watermark picture. This map is preset by the staff for storage.
4) Filling in the height and width of the current watermark picture
5) Selecting the area to be covered by the watermark picture (upper left, upper right, lower left, lower right)
6) Setting the horizontal offset, i.e. the ratio of horizontal distance to horizontal width (%)
7) Setting the vertical offset, i.e. the ratio of vertical distance to vertical height (%)
Third, client computing covering process
1) And taking all edges in the currently played video, performing NMS (network management system) to obtain a uniform frame edge, and capturing the first frame image by the video to obtain a screenshot with a widened edge.
2) The image is converted into a binary image, where the location area of the cover is determined using the OTSU algorithm.
The OTSU algorithm divides the original image into a foreground image and a background image by using a threshold value. And (3) prospect: points, mass moments and average gray levels of the foreground under the current threshold are represented by n1, csum and m 1; background: the point number, the mass moment and the average gray level of the background under the current threshold are represented by n2, sum-csum and m 2; when taking the best threshold, the background should be the most different from the foreground. In the scheme provided by the application, the position of the logo watermark can be determined by using an OTSU algorithm.
3) On the basis of the binary image, the vertical and horizontal specific coordinate positions to be covered by the watermark picture are calculated by utilizing a sobel operator.
4) And (5) playing the video after the watermark picture is covered.
In practical application, when a user watches videos by using a client, different videos need to be switched continuously,
when switching the video to be played, the watermark picture and the covering position used by the covering are required to be determined again.
Fig. 2 is a flowchart of an automatic video watermark hiding method according to an embodiment of the present invention; referring to fig. 2, a further description is made on an automatic video watermark covering method provided by the present application, where the automatic video watermark covering method includes:
s201, a client monitors a video played by a user on a current page before playing to obtain a CP (content provider) and video definition parameter information of the video which the user needs to watch, and sends the CP and the video definition parameter information to a background;
s202, the background provides CP information and video definition parameter information according to the client, inquires the current CP and the watermark picture corresponding to the definition, covers the position, and sends to the client:
s2021, different CP videos are manually analyzed, the definition (480P, 720P and 1080P) of the current CP video, the positions (upper left, upper right, lower left and lower right) of logo watermarks, the height width vertical offset (vertical distance and vertical height ratio) of the logo watermarks and the horizontal offset (horizontal distance and horizontal width ratio) of the logo watermarks are obtained, and a special covering watermark picture is designed.
S203, after receiving the information, the client covers the current video according to the position, the width and the height, and plays the current video with a watermark picture after covering;
and S204, when the client plays the video, the client requests the background again, so that the watermark picture can be adjusted conveniently according to the background watermark template configuration parameters to shield the logo watermark.
The user is browsing news information videos as an example:
the main video acquisition source for video aggregation is other video manufacturers, especially for news information videos, which requires a large investment of manpower and material resources. The news information video has logo watermark which is the logo of each video provider. However, at present, due to the requirement of the OTT terminal license plate party for content auditing, the CP video content with the LOGO of the platform property (such as the video with LOGO watermark of fox and watermelon) is limited to be put on shelf in other applications. This brings difficulty to other video aggregation applications to show multiple videos.
In the scheme provided by the application, news information videos of all sources are obtained by video aggregation application;
when a user browses a video, before the video is played, the client sends information of the video to be played to a background;
the background determines a watermark picture used for blocking the logo watermark and an expansion position of the watermark picture based on preset information and information of a video to be played;
the client expands the watermark picture at the position for shielding the logo watermark and plays the video at the same time, so that the logo watermark of a video source party cannot be displayed when the video is played, and the requirement of content verification by the OTT end license plate party is met.
When the user switches to the next video, the steps are still executed, so that the logo watermark of each video opened by the user is blocked.
It should be noted that the scheme provided by the present application may be completed by the video aggregation application in cooperation with a display of the client, or may be embedded in a browser of the client and executed by the browser of the user.
Fig. 3 is a structural diagram of an automatic video watermark covering device according to an embodiment of the present invention, and referring to fig. 3, the automatic video watermark covering device includes:
the acquiring module 31 is configured to acquire information of a video to be played;
a determining module 32, configured to determine, based on the information, a target position that needs to be covered by the watermark and a watermark picture used when the target position is covered by the watermark;
and the shielding module 33 is configured to play the video while shielding the target position by the watermark picture.
Therefore, the logo watermark is directly shielded during playing, so that when the video is played, the logo watermark is covered by the watermark picture displayed by the client, the video player meets the current auditing regulation, meanwhile, the video is not required to be decoded, the watermark picture is added after the video is decoded and disassembled, the video is resynthesized, and other operations consume less time, the video size cannot be increased, and the content delay is reduced.
Specifically, the information at least includes: the definition of the video to be played and the content provider of the video to be played.
The determining module is specifically configured to:
based on the information of the video to be played, a preset watermark template is inquired, and the height, width, position and watermark covering offset of the watermark picture to be used and the original watermark to be covered are determined.
The shielding module is specifically used for:
determining the unfolding position of the watermark picture according to the position and the watermark covering offset;
and unfolding the picture and the unfolding position, and simultaneously playing the video to be played so as to cover the original watermark.
Wherein, the determining the unfolding position of the watermark picture through the position and the watermark covering offset comprises:
acquiring all edges in the video to be played, acquiring a uniform border edge, and capturing a first frame image to obtain a screenshot with a widened edge;
converting the screenshot into a binary image, and determining a covered position area by using an OTSU algorithm;
on the basis of the binary image, the vertical and horizontal specific coordinate positions to be covered by the watermark picture are calculated by utilizing a sobel operator.
Further, when switching the video to be played, the watermark picture and the covering position used by the covering need to be determined again.
With regard to the apparatus in the above-described embodiment, the specific manner in which each module performs the operation has been described in detail in the embodiment related to the method, and will not be elaborated here.
Fig. 4 is a structural diagram of an automatic video watermark covering device according to an embodiment of the present invention, and referring to fig. 4, the automatic video watermark covering device includes:
a processor 41, and a memory 42 connected to the processor;
the memory 42 is used for storing a computer program, the computer program is at least used for executing the video watermark automatic covering method according to any embodiment of the present application;
the processor is used for calling and executing the computer program in the memory. The video watermark automatic covering method at least comprises the following steps: acquiring information of a video to be played; based on the information, determining the target position needing to be subjected to watermark covering and a watermark picture used in the shielding process; and playing the video while shielding the target position through the watermark picture.
The detailed description of the video watermark automatic covering method in the above embodiment has been described in detail in the embodiment of the method, and will not be elaborated herein.
The present application further provides a storage medium, where the storage medium stores a computer program, and when the computer program is executed by a processor, the method implements the steps in the video watermark automatic hiding method according to any embodiment of the present application. The video watermark automatic covering method at least comprises the following steps: acquiring information of a video to be played; based on the information, determining the target position needing to be subjected to watermark covering and a watermark picture used in the shielding process; and playing the video while shielding the target position through the watermark picture.
The detailed description of the video watermark automatic covering method in the above embodiment has been described in detail in the embodiment of the method, and will not be elaborated herein.
It is understood that the same or similar parts in the above embodiments may be mutually referred to, and the same or similar parts in other embodiments may be referred to for the content which is not described in detail in some embodiments.
It should be noted that the terms "first," "second," and the like in the description of the present invention are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Further, in the description of the present invention, the meaning of "a plurality" means at least two unless otherwise specified.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and alternate implementations are included within the scope of the preferred embodiment of the present invention in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present invention.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present invention may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. A video watermark automatic covering method is characterized by comprising the following steps:
acquiring information of a video to be played;
based on the information, determining the target position needing to be subjected to watermark covering and a watermark picture used in the shielding process;
and playing the video while shielding the target position through the watermark picture.
2. The method for automatically hiding a video watermark according to claim 1, wherein the information at least comprises: the definition of the video to be played and the content provider of the video to be played.
3. The method for automatically covering the video watermark according to claim 1, wherein the determining the target position to be covered by the watermark and the watermark picture to be used for shielding based on the information comprises:
based on the information of the video to be played, a preset watermark template is inquired, and the height, width, position and watermark covering offset of the watermark picture to be used and the logo watermark to be covered are determined.
4. The method for automatically covering the video watermark according to claim 3, wherein the playing the video while the target position is shielded by the watermark picture comprises:
determining the unfolding position of the watermark picture according to the position and the watermark covering offset;
and unfolding the picture and the unfolding position, and simultaneously playing the video to be played so as to cover the logo watermark.
5. The method for automatically covering the video watermark according to claim 1, wherein the determining the unfolding position of the watermark picture by the position and the watermark covering offset comprises:
acquiring all edges in the video to be played, acquiring a uniform border edge, and capturing a first frame image to obtain a screenshot with a widened edge;
converting the screenshot into a binary image, and determining a covered position area by using an OTSU algorithm;
on the basis of the binary image, the vertical and horizontal specific coordinate positions to be covered by the watermark picture are calculated by utilizing a sobel operator.
6. The method for automatically covering video watermark according to claim 1, wherein the video to be played provided by the same provider with the same definition corresponds to a preset watermark picture.
7. The method for automatically covering video watermark according to claim 1, wherein the watermark picture and the covering position used by covering are re-determined when the video to be played is switched.
8. An automatic video watermark covering device, comprising:
the acquisition module is used for acquiring the information of the video to be played;
the determining module is used for determining a target position needing to be covered by the watermark and a watermark picture used in the shielding process based on the information;
and the shielding module is used for playing the video while shielding the target position through the watermark picture.
9. An automatic video watermark covering device, comprising:
a processor, and a memory coupled to the processor;
the memory is used for storing a computer program at least for executing the video watermark automatic covering method of any one of claims 1 to 7;
the processor is used for calling and executing the computer program in the memory.
10. A storage medium, characterized in that the storage medium stores a computer program, and the computer program is executed by a processor to implement the steps of the video watermark automatic covering method according to any one of claims 1 to 7.
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| CN202011307388.1A CN112423090A (en) | 2020-11-20 | 2020-11-20 | Video watermark automatic covering method, device, equipment and storage medium |
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Citations (4)
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Application publication date: 20210226 |