CN113259716A - Video issuing method, video acquiring method, server, terminal and system - Google Patents
Video issuing method, video acquiring method, server, terminal and system Download PDFInfo
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- CN113259716A CN113259716A CN202110764844.3A CN202110764844A CN113259716A CN 113259716 A CN113259716 A CN 113259716A CN 202110764844 A CN202110764844 A CN 202110764844A CN 113259716 A CN113259716 A CN 113259716A
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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
- H04N21/2343—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements
- H04N21/234363—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements by altering the spatial resolution, e.g. for clients with a lower screen resolution
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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
Abstract
The application provides a video issuing method, a video acquiring method, a server, a terminal and a system, wherein the video issuing method comprises the following steps: acquiring zooming characteristic setting information aiming at a target video code stream from a display terminal, wherein the zooming characteristic setting information indicates the position relation of a target display area relative to a complete picture and the target resolution of the target display area; encoding original video data to generate a target video code stream which accords with the zooming characteristic setting information, wherein a picture area of the target video code stream after decoding is the target display area, and the resolution of the target video code stream after decoding is the target resolution; and issuing the target video code stream which accords with the zooming characteristic setting information to the display terminal. By using the method, the memory space of the video issuing server can be reduced, and the display terminal can always display clear pictures in the zooming operation process.
Description
Technical Field
The application belongs to the technical field of video processing, and particularly relates to a video issuing method, a video acquiring method, a server, a terminal and a system.
Background
This section is intended to provide a background or context to the embodiments of the application. The description herein is not admitted to be prior art by inclusion in this section.
The traditional video distribution server pre-stores or generates video code streams with various resolutions in real time, and then selects a video code stream version meeting the target resolution from the video code streams and distributes the video code stream version to the display terminal. The target resolution is the resolution of the video code stream expected to be acquired by the display terminal. When the user performs a zoom operation at the terminal, the quality of the displayed picture is not good.
Disclosure of Invention
The embodiment of the application provides a video issuing method, a video acquiring method, a server, a terminal and a system.
The examples of the present application provide the following: a video issuing method is applied to a server and comprises the following steps:
acquiring zooming characteristic setting information aiming at a target video code stream from a display terminal, wherein the zooming characteristic setting information indicates the position relation of a target display area relative to a complete picture and the target resolution of the target display area;
encoding original video data to generate a target video code stream which accords with the zooming characteristic setting information, wherein a picture area of the target video code stream after decoding is the target display area, and the resolution of the target video code stream after decoding is the target resolution;
and issuing the target video code stream which accords with the zooming characteristic setting information to the display terminal.
The examples of the present application provide the following: a video acquisition method is applied to a display terminal and comprises the following steps:
generating scaling characteristic setting information aiming at a target video code stream in response to user operation, wherein the scaling characteristic setting information indicates the position relation of a target display area relative to a complete picture and the target resolution of the target display area;
sending the zoom feature setting information to a server;
receiving a video code stream which accords with the zooming characteristic from a server;
and decoding and playing the received video code stream.
The examples of the present application provide the following: a video delivery server, comprising:
the system comprises an acquisition module, a display module and a display module, wherein the acquisition module is used for acquiring zooming characteristic setting information aiming at a target video code stream from a display terminal, and the zooming characteristic setting information indicates the position relation of a target display area relative to a complete picture and the target resolution of the target display area;
the encoding module is used for encoding original video data to generate a target video code stream which accords with the zooming characteristic setting information, wherein a picture area of the target video code stream after decoding is the target display area, and the resolution of the target video code stream after decoding is the target resolution;
and the issuing module is used for issuing the target video code stream which accords with the zooming characteristic setting information to the display terminal.
The examples of the present application provide the following: a video delivery server, comprising: at least one processor; and a memory communicatively coupled to the at least one processor; wherein the memory stores instructions executable by the at least one processor to cause the at least one processor to perform: the video issuing method is described above.
The examples of the present application provide the following: a display terminal, comprising:
the characteristic generating module is used for responding to user operation to generate scaling characteristic setting information aiming at the target video code stream, and the scaling characteristic setting information indicates the position relation of a target display area relative to a complete picture and the target resolution of the target display area;
the characteristic sending module is used for sending the zooming characteristic setting information to a server;
the code stream receiving module is used for receiving the video code stream which accords with the zooming characteristic setting information from the server;
and the playing module is used for decoding and playing the received video code stream.
The examples of the present application provide the following: a display terminal, comprising: at least one processor; and a memory communicatively coupled to the at least one processor; wherein the memory stores instructions executable by the at least one processor to cause the at least one processor to perform: the video acquisition method is described.
The examples of the present application provide the following: a video receiving and sending system is characterized by comprising the video sending server and the display terminal.
The embodiment of the application adopts at least one technical scheme which can achieve the following beneficial effects: on one hand, the storage capacity of the video issuing server is reduced, namely, video files with various resolution versions do not need to be stored in advance or made in real time. Furthermore, the resolution and the display area of the video code stream issued by the video issuing server to the display terminal can be flexibly customized, so that the display terminal can always display clear images when the user executes the zooming operation of the display terminal.
It should be understood that the above description is only an overview of the technical solutions of the present application, so as to enable the technical solutions of the present application to be more clearly understood, and thus can be implemented according to the content of the description. In order to make the aforementioned and other objects, features and advantages of the present application more comprehensible, embodiments of the present application are described below.
Drawings
The advantages and benefits described herein, as well as other advantages and benefits, will be apparent to those of ordinary skill in the art upon reading the following detailed description of the exemplary embodiments. The drawings are only for purposes of illustrating exemplary embodiments and are not to be construed as limiting the application. Also, like reference numerals are used to refer to like elements throughout. In the drawings:
fig. 1 is a schematic flowchart of a video delivery method according to an embodiment of the present application;
FIG. 2 is a schematic diagram illustrating a comparison between a video delivery method according to an embodiment of the present application and a conventional video delivery method;
fig. 3 is a schematic flowchart of a video acquisition method according to an embodiment of the present application;
fig. 4 and 5 are schematic structural diagrams of a video delivery server according to an embodiment of the present application, respectively;
fig. 6 and 7 are schematic structural diagrams of a display terminal according to an embodiment of the present application, respectively.
In the drawings, the same or corresponding reference numerals indicate the same or corresponding parts.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
In this application, it is to be understood that terms such as "including" or "having" are intended to indicate the presence of the disclosed features, integers, steps, acts, components, parts, or combinations thereof, and do not preclude the presence or addition of one or more other features, integers, steps, acts, components, parts, or groups thereof.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
Fig. 1 is a schematic flowchart of a video delivery method according to an embodiment of the present application, the method is used for delivering a video code stream to a display terminal, and in the process, from the perspective of a device, an execution subject may be a video delivery server; from the program perspective, the execution main body may be a program loaded on these video delivery servers accordingly.
The flow in fig. 1 may include the following steps 101 to 103.
102, encoding original video data corresponding to the target video code stream to generate a target video code stream which accords with the zooming characteristic setting information, wherein a picture area of the decoded target video code stream is the target display area, and a resolution of the decoded target video code stream is the target resolution;
103, issuing the target video code stream according with the zooming characteristic setting information to the display terminal.
The video delivery server can only store one original video data with higher resolution, then encode the original video data according to the requirement of the display terminal (namely, the zoom characteristic setting information), and then deliver the corresponding target video code stream to the display terminal. The scaling characteristic setting information indicates both the positional relationship of the display area of the target video stream with respect to the display area of the original video data (e.g., a full picture or a partial picture corresponding to the original video data) and the resolution of the target video stream. In other words, the display terminal may acquire the video code of the specified resolution of the specified display area from the video delivery server.
On one hand, the storage capacity of the video issuing server is reduced, namely, video files with various resolution versions do not need to be stored in advance or made in real time. Furthermore, the resolution and the display area of the video code stream issued by the video issuing server to the display terminal can be flexibly customized, so that clear images can be displayed all the time when the display terminal executes the picture scaling operation.
Fig. 3 is a schematic flowchart of a video acquisition method according to an embodiment of the present application, where the method is used to acquire a video bitstream from a video delivery server, and in the process, from a device perspective, an execution subject may be a display terminal; from a program perspective, the execution main body may accordingly be a program loaded on these video terminals. The video acquisition method corresponds to the video distribution method.
The flow in fig. 3 may include the following steps 201 to 204.
and step 204, decoding and playing the received video code stream.
That is, the display terminal does not passively receive the video code stream of the complete picture with fixed resolution from the video delivery server, but actively informs the video delivery server whether the video code stream corresponds to the complete picture or the local picture, and what the resolution of the video code stream is. And when the user performs the screen zooming operation, the display terminal does not need to perform image processing corresponding to the zooming operation, thereby reducing the calculation amount and power consumption of the display terminal.
The method is suitable for on-demand scenes, live scenes, cloud game scenes, real-time viewed monitoring video scenes and the like.
In some embodiments, the encoding, corresponding to a video delivery server, of original video data corresponding to a target video code stream in a case where a target display area is a local area of a complete picture includes:
intercepting a video frame of the original video data according to the position relation of a target display area relative to a complete picture;
adjusting the resolution of the intercepted video frame to the target resolution;
and coding the intercepted video frame which accords with the target resolution ratio to obtain the target video code stream which accords with the zooming characteristic setting information.
Correspondingly, corresponding to the display terminal, when the user operation instructs to cut out the partial screen from the full screen and enlarge the cut-out partial screen, the target resolution of the target display area is the same as the resolution of the full screen before the execution time of the user operation.
With reference to fig. 2, in the conventional video delivery method, the video delivery server pre-stores versions of the same video file with different resolutions, and delivers video streams with corresponding resolutions to the display terminal according to the requirements of the display terminal. For example, for the same video asset, three resolution versions of 4K (4096 × 2160), 1080P (1920 × 1080), and 720P (1280 × 720) are stored in advance.
The video issuing method and the video acquiring method provided by the application. The video distribution server pre-stores or receives a video resource (e.g., 7680 x 4320) in a higher resolution format in real time. And displaying the video code stream of which resolution format the terminal needs, namely generating and issuing the video code stream of which resolution format.
Taking the example that the user watches the network video on the notebook, the user watches the video code stream with 1080P resolution. When the user performs the operation of local enlargement on the display terminal, the local picture seen by the user is still a 1080P resolution local picture.
For the operation of magnifying the partial image, the user may control the region requiring the partial magnification and the magnification of the magnification by separating the two fingers from each other on the screen of the mobile phone or the tablet computer. The user can also draw a rectangular frame by using a mouse of the personal computer to determine a display area needing local amplification, or perform continuous step-by-step image amplification by double clicking the mouse, sliding a scroll wheel and the like.
Specifically, the positional relationship of the target display area with respect to the full screen may be identified by coordinates of two points on a diagonal line of the target display area (generally, a rectangle). Taking the cell phone resolution as 1080 × 720, the coordinates of the upper left corner of the screen as (0, 0), and the coordinates of the lower right corner of the screen as (719,1079), for example, the target display area can be represented by the coordinates (10, 10) and (100 ) of two points. In this example, the top left corner display area of the screen is enlarged, and the resolution after enlargement is still 1080 × 720.
When the display terminal displays the partial screen, if the user performs an operation of reducing the screen on the display terminal, an operation of enlarging the display area of the screen and keeping the target resolution unchanged is actually performed.
When the display terminal displays a complete picture, if the user performs an operation of reducing the picture on the display terminal, the operation of increasing the resolution of the picture is actually performed.
For a video delivery server, under the condition that a target display area is a complete picture, encoding original video data corresponding to a target video code stream, wherein the encoding comprises the following steps:
and if the resolution of the original video data is smaller than the target resolution, performing super-division on the video frame of the original video data, and encoding the super-divided video frame to obtain the target video code stream according with the zooming characteristic.
For example, the original video data is 1080P, and the display terminal needs a video stream with 2K resolution, the video delivery server may increase the resolution of the video stream by interpolation, super sampling (super sampling), or generative countermeasure network (GAN network).
For the display terminal, under the condition that the user operation instruction reduces the complete picture, the target display area is still the complete picture area, and the target resolution is increased, wherein the target resolution does not exceed the screen resolution of the display terminal.
For example, the screen resolution of the display terminal is 2K, while the resolution of the currently played video stream is 720P and the played video stream is a full picture. When the user performs an operation of reducing the screen on the display terminal, for example, an operation of sliding two fingers close to each other on a touch panel or an operation of scrolling a wheel on a mouse of a PC instructs to reduce the screen. In this way, the display terminal informs the video delivery server that the video delivery server desires to obtain a 1080P or 2K resolution video stream (and displays a complete display screen). Certainly, because the display capability of the display terminal is limited, the display terminal does not require the video delivery server to deliver the video code stream with the resolution of 4K.
Based on the same technical concept, the embodiment of the present application further provides a video delivery server, configured to execute the video delivery method provided in any of the embodiments. Fig. 4 is a schematic structural diagram of a video delivery server according to an embodiment of the present application.
As shown in fig. 4, the video delivery server provided in the embodiment of the present application includes:
the system comprises an acquisition module 1, a processing module and a display module, wherein the acquisition module is used for acquiring zooming characteristic setting information aiming at a target video code stream from a display terminal, and the zooming characteristic setting information indicates the position relation of a target display area relative to a complete picture and the target resolution of the target display area;
the encoding module 2 is configured to encode original video data corresponding to the target video code stream to generate a target video code stream meeting the zoom feature setting information, where a picture area of the decoded target video code stream is the target display area, and a resolution of the decoded target video code stream is the target resolution;
and the issuing module 3 is used for issuing the target video code stream which accords with the zooming characteristic setting information to the display terminal.
Optionally, the encoding module 2 is implemented by a Graphics Processor (GPU) or an Application Specific Integrated Circuit (ASIC). Namely, a video code stream which meets the target resolution and corresponds to the target display area is generated in real time by adopting a graphic processor or an application specific integrated circuit. In other words, hardware encoding is employed.
Fig. 5 is a video delivery server according to an embodiment of the present application, configured to execute the video delivery method shown in fig. 1, where the video delivery server includes: at least one processor; and a memory communicatively coupled to the at least one processor; wherein the memory stores instructions executable by the at least one processor to cause the at least one processor to perform: the video issuing method is described above.
As shown in fig. 6, an embodiment of the present application provides a display terminal, including:
the characteristic generating module 4 is used for responding to user operation and generating scaling characteristic setting information aiming at the target video code stream, wherein the scaling characteristic setting information indicates the position relation of a target display area relative to a complete picture and the target resolution of the target display area;
a feature sending module 5, configured to send the scaling feature setting information to a server;
a code stream receiving module 6, configured to receive, from the server, a video code stream that conforms to the scaling characteristic setting information;
and the playing module 7 is used for decoding and playing the received video code stream.
As shown in fig. 7, an embodiment of the present application provides a display terminal, including: at least one processor; and a memory communicatively coupled to the at least one processor; wherein the memory stores instructions executable by the at least one processor to cause the at least one processor to perform: the video acquisition method is described.
The embodiment of the application also provides a video receiving and sending system, which comprises the video sending server and the display terminal.
It should be noted that the apparatus in the embodiment of the present application may implement each process of the foregoing method embodiment, and achieve the same effect and function, which are not described herein again.
Method embodiments of the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects.
While the spirit and principles of the application have been described with reference to several particular embodiments, it is to be understood that the application is not limited to the disclosed embodiments, nor is the division of aspects, which is for convenience only as the features in such aspects may not be combined to benefit from the description. The application is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.
Claims (12)
1. A video issuing method is applied to a server and is characterized by comprising the following steps:
acquiring zooming characteristic setting information aiming at a target video code stream from a display terminal, wherein the zooming characteristic setting information indicates the position relation of a target display area relative to a complete picture and the target resolution of the target display area;
encoding original video data corresponding to the target video code stream to generate a target video code stream which accords with the zooming characteristic setting information, wherein a picture area of the target video code stream after decoding is the target display area, and the resolution of the target video code stream after decoding is the target resolution;
and issuing the target video code stream which accords with the zooming characteristic setting information to the display terminal.
2. The method of claim 1, wherein encoding the original video data corresponding to the target video bitstream in case that the target display area is a partial area of a full picture comprises:
intercepting a video frame of the original video data according to the position relation of a target display area relative to a complete picture;
adjusting the resolution of the intercepted video frame to the target resolution;
and coding the intercepted video frame which accords with the target resolution ratio to obtain the target video code stream which accords with the zooming characteristic setting information.
3. The method of claim 1, wherein encoding the original video data corresponding to the target video bitstream in case that the target display area is a full picture comprises:
and if the resolution of the original video data is smaller than the target resolution, performing super-division on the video frame of the original video data, and encoding the super-divided video frame to obtain the target video code stream which accords with the zooming characteristic setting information.
4. A video acquisition method is applied to a display terminal, and is characterized by comprising the following steps:
generating scaling characteristic setting information aiming at a target video code stream in response to user operation, wherein the scaling characteristic setting information indicates the position relation of a target display area relative to a complete picture and the target resolution of the target display area;
sending the scaling characteristic setting information aiming at the target video code stream to a server;
receiving a video code stream which accords with the zooming characteristic setting information from a server;
and decoding and playing the received video code stream.
5. The method according to claim 4, wherein in a case where the user operation instructs to cut out the partial picture from the full picture and to enlarge the cut-out partial picture, the target resolution of the target display area is the same as the resolution of the full picture before the execution time of the user operation.
6. The method according to claim 4, wherein in a case where the user operation indicates to zoom out the full screen, the target display area remains the full display area, and the target resolution is increased according to the user operation, wherein the target resolution does not exceed the screen resolution of the display terminal.
7. A video delivery server, comprising:
the system comprises an acquisition module, a display module and a display module, wherein the acquisition module is used for acquiring zooming characteristic setting information aiming at a target video code stream from a display terminal, and the zooming characteristic setting information indicates the position relation of a target display area relative to a complete picture and the target resolution of the target display area;
the encoding module is used for encoding original video data corresponding to the target video code stream to generate a target video code stream which accords with the zooming characteristic setting information, wherein a picture area of the target video code stream after decoding is the target display area, and the resolution of the target video code stream after decoding is the target resolution;
and the issuing module is used for issuing the target video code stream which accords with the zooming characteristic setting information to the display terminal.
8. The video distribution server of claim 7, wherein the encoding module is implemented by a graphics processor or an application specific integrated circuit.
9. A video delivery server, comprising: at least one processor; and a memory communicatively coupled to the at least one processor; wherein the memory stores instructions executable by the at least one processor to cause the at least one processor to perform: a method according to any one of claims 1 to 3.
10. A display terminal, comprising:
the characteristic generating module is used for responding to user operation to generate scaling characteristic setting information aiming at the target video code stream, and the scaling characteristic setting information indicates the position relation of a target display area relative to a complete picture and the target resolution of the target display area;
the characteristic sending module is used for sending the zooming characteristic setting information to a server;
the code stream receiving module is used for receiving the video code stream which accords with the zooming characteristic setting information from the server;
and the playing module is used for decoding and playing the received video code stream.
11. A display terminal, comprising: at least one processor; and a memory communicatively coupled to the at least one processor; wherein the memory stores instructions executable by the at least one processor to cause the at least one processor to perform: the method according to any one of claims 4 to 6.
12. A video transceiving system comprising the video distribution server according to any one of claims 7 to 9 and the display terminal according to claim 10 or 11.
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| CN202110764844.3A CN113259716A (en) | 2021-07-07 | 2021-07-07 | Video issuing method, video acquiring method, server, terminal and system |
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| CN202110764844.3A CN113259716A (en) | 2021-07-07 | 2021-07-07 | Video issuing method, video acquiring method, server, terminal and system |
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Application publication date: 20210813 |