CN111698520A - Multi-view video playing method, device, terminal and storage medium - Google Patents
Multi-view video playing method, device, terminal and storage medium Download PDFInfo
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- 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
- H04N21/21805—Source of audio or video content, e.g. local disk arrays enabling multiple viewpoints, e.g. using a plurality of cameras
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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 or manipulating encoded video stream scene graphs
- H04N21/2343—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements
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- 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 or rendering scenes according to encoded video stream scene graphs
- H04N21/44012—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving rendering scenes according to scene graphs, e.g. MPEG-4 scene graphs
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- 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 or rendering scenes according to encoded video stream scene graphs
- H04N21/4402—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display
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- H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client
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Abstract
The embodiment of the invention provides a method, a device, a terminal and a storage medium for playing a multi-view video, wherein the method comprises the following steps: when a multi-view video playing instruction is obtained, a player is created, and a first view video in the multi-view video corresponding to the multi-view video playing instruction is obtained through the player; decoding the first visual angle video, and playing the decoded first visual angle video through a player; the method comprises the steps that when a first visual angle video is obtained, a first type of visual angle video corresponding to the first visual angle video in the multi-visual angle video is obtained; and when the visual angle switching instruction is acquired, stopping playing the first visual angle video, and playing a second visual angle video in the first type of visual angle videos through the player. By applying the embodiment of the invention, the playing time delay caused by reconstructing the player and determining the second visual angle video can be reduced, and the video watching experience of a user can be improved.
Description
Technical Field
The present invention relates to the field of image processing technologies, and in particular, to a method, an apparatus, a terminal, and a storage medium for playing a multi-view video.
Background
When watching videos of sports events, art programs and the like, a user may have a need to watch objects in the videos from multiple viewing angles, for example, when watching a video image of a front viewing angle of star a in the art program, the user may want to watch a video image of a left viewing angle of star a. In order to meet the above requirements of users, technologies for playing multi-view video have been developed.
At present, the playing of multi-view video is realized based on the switching of multiple paths of video and multiple players. Specifically, a plurality of cameras may be preset, each camera captures a video from a different view angle to obtain videos of a plurality of view angles, and then the video of each view angle is encoded and compressed to obtain a multi-view video.
When a user needs to watch the multi-view video, a watching instruction can be sent, the terminal can create a player after receiving the watching instruction, then a first view video in the multi-view video is obtained, the first view video is decoded, and the player displays the decoded first view video. When a user needs to watch videos of other visual angles in the multi-visual-angle video, a visual angle switching instruction can be sent, the terminal can create a new player when receiving the visual angle switching instruction, then a second visual angle video of the visual angle corresponding to the visual angle switching instruction is obtained, the second visual angle video is decoded, and the newly created player displays the decoded second visual angle video for the user to watch.
In the current playing process of a multi-view video, when a user switches views, a terminal needs to create a new player and acquire a second view video, the newly created player displays the second view video for the user to watch, and since the creation of the player and the acquisition of the second view video both need to spend a certain time, the time delay of video playing when the user switches views is high, and the video watching experience of the user is affected.
Disclosure of Invention
Embodiments of the present invention provide a method, an apparatus, a terminal, and a storage medium for playing a multi-view video, so as to reduce a time delay of video playing when a user switches view angles, and improve video watching experience of the user.
The specific technical scheme is as follows:
in a first aspect, an embodiment of the present invention provides a method for playing a multi-view video, where the method includes:
when a multi-view video playing instruction is acquired, a player is created, and a first view video in the multi-view video corresponding to the multi-view video playing instruction is acquired through the player, wherein the multi-view video comprises videos of a plurality of preset views;
decoding the first visual angle video, and playing the decoded first visual angle video through the player;
acquiring a first type of visual angle video corresponding to the first visual angle video in the multi-visual angle video while acquiring the first visual angle video;
and when a visual angle switching instruction is acquired, stopping playing the first visual angle video, and playing a second visual angle video in the first type of visual angle videos through the player.
Optionally, the step of obtaining a first type of view video corresponding to the first view video in the multi-view video includes:
acquiring a first type of visual angle video corresponding to the first visual angle video from the multi-visual angle video according to a preset video loading rule;
decoding the first type of view video to obtain a decoded first type of view video;
the step of playing, by the player, a second view video corresponding to the view switching instruction in the first type of view video includes:
determining a target visual angle corresponding to the visual angle switching instruction;
and acquiring a decoded second visual angle video corresponding to the target visual angle from the decoded first type of visual angle video, and playing the second visual angle video.
Optionally, when the second-view video is played, the method further includes:
and acquiring a first type of view video corresponding to the second view video from the multi-view video according to the video loading rule, and returning to the step of decoding the first type of view video.
Optionally, the step of acquiring a first type of view video corresponding to the first view video from the multi-view video according to a preset video loading rule includes:
determining a preset visual angle video of a visual angle of which the difference value of the visual angle corresponding to the first visual angle video is within a preset angular range as a first type of visual angle video;
and acquiring the first type of visual angle video from the multi-visual angle video.
Optionally, the multi-view video is generated in advance by a preset server;
the method for generating the multi-view video comprises the following steps:
shooting a target object through each camera positioned at each preset visual angle simultaneously to obtain a video of each preset visual angle;
constructing description information for representing the corresponding relation between the video of each preset visual angle and the visual angle thereof;
compressing the video of each preset visual angle to obtain a path of video stream comprising the video of each preset visual angle;
and storing the description information and the video stream to a Content Delivery Network (CDN) server.
Optionally, the step of obtaining a second view video corresponding to the target view from the decoded first view video includes:
determining a second visual angle video corresponding to the target visual angle according to the corresponding relation represented by the description information;
and acquiring the second visual angle video from the decoded first visual angle video.
Optionally, the multi-view video is downloaded from a CDN server in advance for the terminal and cached locally.
In a second aspect, an embodiment of the present invention provides an apparatus for playing a multi-view video, where the apparatus includes:
the device comprises a player creating module, a playing module and a playing module, wherein the player creating module is used for creating a player when a multi-view video playing instruction is obtained, and obtaining a first view video in the multi-view video corresponding to the multi-view video playing instruction through the player, wherein the multi-view video comprises videos of a plurality of preset views;
the video playing module is used for decoding the first visual angle video and playing the decoded first visual angle video through the player;
the first alternative video acquisition module is used for acquiring a first type of view videos corresponding to the first view video in the multi-view videos while acquiring the first view video;
and the visual angle switching module is used for stopping playing the first visual angle video when a visual angle switching instruction is acquired, and playing a second visual angle video in the first type of visual angle videos through the player.
In a third aspect, an embodiment of the present invention provides a terminal, including a processor, a communication interface, a memory, and a communication bus, where the processor and the communication interface complete communication between the memory and the processor through the communication bus;
a memory for storing a computer program;
and the processor is used for realizing the steps of the multi-view video playing method when executing the program stored in the memory.
In a fourth aspect, an embodiment of the present invention provides a computer-readable storage medium, where a computer program is stored in the computer-readable storage medium, and when the computer program is executed by a processor, the method for playing a multi-view video is implemented as any one of the above-mentioned steps.
In the scheme provided by the embodiment of the invention, when the terminal acquires the multi-view video playing instruction, the player can be created, and the first view angle video in the multi-view video corresponding to the multi-view video playing instruction is acquired through the player, wherein the multi-view video comprises videos of a plurality of preset view angles; decoding the first visual angle video, and playing the decoded first visual angle video through a player; the method comprises the steps that when a first visual angle video is obtained, a first type of visual angle video corresponding to the first visual angle video in the multi-visual angle video is obtained; and when the visual angle switching instruction is acquired, stopping playing the first visual angle video, and playing a second visual angle video in the first type of visual angle videos through the player.
The terminal can establish a player when acquiring a multi-view video playing instruction, and simultaneously acquire a first type of view angle video when acquiring a first view angle video, the terminal does not need to reestablish the player when receiving a view angle switching instruction, and can play a second view angle video by the established player without reestablishing the player.
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.
Fig. 1 is a flowchart illustrating a method for playing a multi-view video according to an embodiment of the present invention;
FIG. 2 is a flow chart of a method for generating a multi-view video according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a generating method and a playing method of a multi-view video according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a multi-view video playing apparatus according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of a multi-view video generation module according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a terminal according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described below with reference to the drawings in the embodiments of the present invention.
In order to reduce the time delay of video playing when a user switches viewing angles and improve the video watching experience of the user, the embodiment of the invention provides a playing method, a device, a terminal, a storage medium and a computer program product of a multi-viewing-angle video.
First, a method for playing a multi-view video according to an embodiment of the present invention is described below.
The method for playing the multi-view video provided by the embodiment of the present invention may be applied to a terminal, and the terminal may be a smart phone, a tablet computer, a smart television, a personal computer, and the like, which is not limited specifically herein.
As shown in fig. 1, a method for playing a multi-view video, the method comprising:
s101, when a multi-view video playing instruction is obtained, a player is created, and a first view video in the multi-view video corresponding to the multi-view video playing instruction is obtained through the player;
wherein the multi-view video includes videos of a plurality of preset views.
S102, decoding the first view video, and playing the decoded first view video through the player;
s103, acquiring a first type of view video corresponding to the first view video in the multi-view video while acquiring the first view video;
and S104, when a visual angle switching instruction is acquired, stopping playing the first visual angle video, and playing a second visual angle video in the first type of visual angle videos through the player.
Therefore, in the scheme provided by the embodiment of the invention, when the terminal acquires the multi-view video playing instruction, the player can be created, and the player acquires the first view angle video in the multi-view video corresponding to the multi-view video playing instruction, wherein the multi-view video comprises videos of a plurality of preset view angles; decoding the first visual angle video, and playing the decoded first visual angle video through a player; the method comprises the steps that when a first visual angle video is obtained, a first type of visual angle video corresponding to the first visual angle video in the multi-visual angle video is obtained; and when the visual angle switching instruction is acquired, stopping playing the first visual angle video, and playing a second visual angle video in the first type of visual angle videos through the player.
The terminal can establish a player when acquiring a multi-view video playing instruction, and simultaneously acquire a first type of view angle video when acquiring a first view angle video, the terminal does not need to reestablish the player when receiving a view angle switching instruction, and can acquire a first type of view angle video corresponding to the first view angle video from the established player, and the player does not need to be reestablished by an established second view angle video of the player.
In step S101, when a user wants to watch a certain multi-view video, the user may send a multi-view video playing instruction, and when the terminal acquires the multi-view video playing instruction, the terminal may create a player, and acquire a first view video in the multi-view video through the player. The terminal can provide a user interface through which a user can send out a multi-view video playing instruction, the user interface can be a button in a terminal display interface, and the user can send out the multi-view video playing instruction by clicking the button.
The multi-view video includes a plurality of preset views, for example, the multi-view video may include front views, left views, right views and back views. The first-view video is a preset-view video included in the multi-view video, for example, the first-view video may be a front-view video included in the multi-view video. The multi-view video playing instruction can include identification of the multi-view video, and the terminal can acquire the multi-view video according to the identification of the multi-view video. The multi-view video may be a video stored in a Content Delivery Network (CDN) server, and when the terminal acquires a multi-view video playing instruction, the terminal may download a first view video in the multi-view video from the CDN server through the created player. The multi-view video may also be a video that is downloaded in advance from the CDN server by the terminal and cached in the local, and when the terminal obtains the multi-view video playing instruction, the terminal may play the first view video in the locally cached multi-view video through the created player, which is reasonable and not particularly limited.
After the first view video is acquired, the terminal can decode the first view video, and then can play the decoded first view video through the player for the user to watch.
In one embodiment, the terminal may perform decoding Processing on the first view video by calling a hardware decoder in a Central Processing Unit (CPU) or a hardware decoder in a Graphics Processing Unit (GPU) of the terminal.
When a user wants to view a video at a preset view angle other than the video at the first view angle in the multi-view video, the terminal needs to switch the video played by the player to the video at the preset view angle that the user wants to view.
In order to reduce the time delay of video playing when the user switches the view angle, in step S103, the terminal may obtain the first type of view angle video corresponding to the first view angle video in the multi-view angle video while obtaining the first view angle video. The first type of view video is a video of a preset view other than the first view video. When the terminal acquires the multi-view video playing instruction, the instruction for acquiring the first type of view video corresponding to the first view video can be triggered, so that the terminal can acquire the first view video and the first type of view video corresponding to the first view video from the server at the same time.
When a user watches a first view video, the user may want to view a video of a view angle within a view angle range adjacent to a view angle corresponding to the first view video, and therefore, in an embodiment, the first view video may be a video of a default view angle, the video of the default view angle may be, for example, a video of a front view angle, and the first type of view video may be a video of a view angle within a view angle range adjacent to the default view angle, which is predicted by the terminal and the user wants to view by the terminal. The terminal can predict the first type of view video according to the human eye view, for example, the single eye comfortable view of a human is 60 °, and then the terminal can acquire videos of preset views within 60 ° view ranges at left and right sides of a view corresponding to the first view video in the multi-view video as the first type of view video.
In another embodiment, a first type of view video corresponding to the first view video may be preset, and the terminal may acquire the first view video and the first type of view video when acquiring the multi-view video playing instruction. For example, the first-view video is a front-view video, the first-class view video corresponding to the first-view video is a right-view video and a left-view video, and when the terminal acquires the multi-view video playing instruction, the front-view video, the right-view video and the left-view video can be acquired simultaneously.
In step S104, when the user wants to view videos with preset viewing angles other than the first viewing angle video, a viewing angle switching instruction may be sent, and then the terminal may stop playing the first viewing angle video when acquiring the viewing angle switching instruction, and then play the second viewing angle video in the first type of viewing angle video through the player.
For example, the view switching instruction sent by the user is "switch to a left 45 ° view", which indicates that the user wants to watch a video with a left 45 ° view of a view corresponding to the first view video, if the first type of view video is a preset view video within 60 ° view ranges on left and right sides of the view corresponding to the first view video, when the terminal acquires the view switching instruction, the second view video corresponding to the view switching instruction may be determined from the first type of view video, and then the playing of the first view video is stopped, and the playing of the second view video is performed through the player, that is, the playing of the preset view video with a left 45 ° view of the view corresponding to the first view video is performed.
In one embodiment, the terminal is provided with a gyroscope sensor, and a user can send a view angle switching instruction by adjusting the orientation of the terminal; in another embodiment, the terminal has a touch display screen, and the user may issue the view angle switching instruction by sliding the touch display screen, which is reasonable and not limited in particular.
According to the scheme, the terminal can acquire the first type of visual angle videos in advance, when the visual angle switching instruction sent by the user is acquired, the terminal only needs to play the second visual angle video in the first type of visual angle videos through the established player, the player does not need to be established again, the playing time delay caused by the reconstruction of the player and the determination of the second visual angle video can be reduced, and the video watching experience of the user is improved.
As an implementation manner of the embodiment of the present invention, the step of acquiring a first type of view video corresponding to the first view video in the multi-view video may include:
acquiring a first type of visual angle video corresponding to a first visual angle video from the multi-visual angle video according to a preset video loading rule; and decoding the first type of visual angle video to obtain the decoded first type of visual angle video.
In order to reduce the time consumed for acquiring the second view video, a video loading rule may be preset, and the terminal may acquire the first type of view video corresponding to the first view video from the multi-view video according to the preset video loading rule while acquiring the first view video. The preset video loading rule can be used for representing the view angle range of the first type of view angle video to be loaded.
For example, the preset video loading rules are: the preset visual angle video within the visual angle range of 90 degrees on the left side of the visual angle corresponding to the first visual angle video is determined as the first type of visual angle video, so that the terminal can acquire the first type of visual angle video within the visual angle range of 90 degrees on the left side of the visual angle corresponding to the first visual angle video while acquiring the first visual angle video.
After the first type of view videos are acquired, the terminal can decode the first type of view videos while playing the first type of view videos to obtain the decoded first type of view videos, so that when the terminal needs to play a certain preset view video in the first type of view videos, the decoded preset view video can be directly played, and the playing time delay caused by decoding the first type of view videos can be reduced.
In an embodiment, after the terminal acquires the first view video and the first type of view video corresponding to the first view video, the terminal may perform decoding processing on the first view video and the first type of view video corresponding to the first view video by calling a hardware decoder in a CPU or a hardware decoder in a GPU of the terminal. In another embodiment, it is reasonable to simultaneously and concurrently decode the first view video and the first type of view video corresponding to the first view video by calling a hardware decoder in the CPU and a hardware decoder in the GPU of the terminal, and when the decoding processing capabilities of the hardware decoder in the CPU and the hardware decoder in the GPU of the terminal are insufficient, preferentially decode the first view video.
Correspondingly, the step of playing the second view video of the first view videos by the player may include:
determining a target visual angle corresponding to the visual angle switching instruction; and acquiring a decoded second visual angle video corresponding to the target visual angle from the decoded first type of visual angle video, and playing the second visual angle video.
When a view switching instruction sent by a user is acquired, the terminal can determine a target view corresponding to the view switching instruction. For example, the view switching instruction is "switch to a left 45 ° view", which indicates that the video played by the player is switched from the first view video to the video with the left 45 ° view corresponding to the view of the first view video, and at this time, the terminal may determine that the target view corresponding to the view switching instruction is the left 45 ° view corresponding to the view of the first view video.
After the target view is determined, the terminal may obtain a decoded second view video corresponding to the target view from the decoded first type of view video, and play the second view video. Since the second view video is decoded by the terminal, the terminal can directly play the decoded second view video through the player, so that the play time delay of the second view video can be reduced.
Therefore, in the scheme provided by the embodiment of the invention, the terminal can acquire the first type of visual angle video corresponding to the first visual angle video from the multi-visual angle video according to the preset video loading rule; and decoding the first type of view video to obtain a decoded first type of view video, and then after the terminal determines a target view corresponding to the view switching instruction, acquiring a decoded second view video corresponding to the target view from the decoded first type of view video, and playing the second view video. Therefore, when the view switching instruction is acquired, the terminal does not need to decode the second view video, and can acquire and play the decoded second view video from the decoded first type of view video, so that the playing time delay of the second view video is further reduced.
As an implementation manner of the embodiment of the present invention, when playing the second-view video, the method may further include:
and acquiring a first type of visual angle video corresponding to a second visual angle video from the multi-visual angle video according to a video loading rule, and returning to the step of decoding the first type of visual angle video.
When a user watches a multi-view video, a habit of continuously switching playing angles to watch the multi-view video often exists, that is, when watching a second-view video played by a terminal, the user may want to continue to watch videos at other preset views, so that in order to reduce the time delay of video playing when the view angles are switched, when the terminal plays the second-view video, the terminal can acquire a first type of view angle video corresponding to the second-view video from the multi-view video according to a preset video loading rule.
For example, the video loading rules are: the method includes the steps that the preset visual angle videos corresponding to 60-degree visual angle ranges on the left side and the right side of a visual angle corresponding to the preset visual angle video played by a player at present are determined as first-class visual angle videos, and when the visual angle corresponding to the second visual angle video is the preset visual angle video corresponding to the 120-degree visual angle, the terminal can acquire the preset visual angle videos corresponding to 60-180-degree visual angle ranges from the multi-visual angle videos to serve as the first-class visual angle videos.
After the first type of view videos are acquired, the terminal may return to the step of performing the decoding processing on the first type of view videos to obtain the decoded first type of view videos, and then when the user sends a view switching instruction again, the terminal may determine a target view corresponding to the view switching instruction sent again by the user, and acquire a decoded second view video corresponding to the target view from the decoded first type of view videos, so that the player may stop playing the currently played video and start playing the second view video. Therefore, the playing time delay caused by decoding the first type of visual angle video corresponding to the second visual angle video by the terminal can be reduced, the video playing consistency during continuous visual angle switching is ensured, and the user requirements are met.
As can be seen, in the scheme provided in the embodiment of the present invention, after the terminal plays the second view video, the first type of view video corresponding to the second view video may be acquired from the multi-view video according to the video loading rule, and the step of performing decoding processing on the first type of view video is returned. Therefore, when the terminal plays the second visual angle video, the first type of visual angle video corresponding to the second visual angle video can be obtained according to the video loading rule, the first type of visual angle video is decoded, when a user continuously sends a visual angle switching instruction, the continuity of video playing during continuous visual angle switching can be guaranteed, and the user needs are met.
As an implementation manner of the embodiment of the present invention, the step of acquiring, according to a preset video loading rule, a first type of view video corresponding to the first view video from the multi-view video may include:
determining a preset visual angle video of a visual angle within a preset angular range corresponding to the difference value of the visual angle of the first visual angle video as a first type of visual angle video; from the multi-view video, a first type of view video is acquired.
In an embodiment, a preset angle range may be preset, and the terminal may determine that a viewing angle, within the preset angle range, of a difference value between viewing angles corresponding to the first viewing angle video is the first type of viewing angle video. For example, the preset angle range is [ -60 °, 60 ° ], and when the viewing angle corresponding to the first-view-angle video is a 90 ° viewing angle, the terminal may determine that the preset-view-angle video within the 30 ° to 150 ° viewing angle range in the multi-view-angle video is the first-type viewing angle video. The preset angle range can be set according to the visual characteristics of people, the shooting angle range of the camera and other factors.
Therefore, after the first type of visual angle video is determined, the terminal can acquire the first type of visual angle video from the multi-visual angle video, the time required for acquiring the second visual angle video can be reduced, and the time delay of video playing when the user switches visual angles is further reduced.
Therefore, in the scheme provided by the embodiment of the invention, the terminal can determine that the preset visual angle video of the visual angle, of which the difference value of the visual angle corresponding to the first visual angle video is within the preset angular range, is the first type of visual angle video; from the multi-view video, a first type of view video is acquired. In this way, the terminal can accurately predict the first type of view videos that the user may want to view according to the preset angle range.
As an implementation manner of the embodiment of the present invention, the multi-view video is generated in advance by a preset server.
The multi-view video can be generated by a preset server by performing encoding processing and compression processing on videos of a plurality of preset views obtained by shooting by a plurality of cameras, wherein the preset server is a preset server for performing encoding processing and compression processing on the videos of the plurality of preset views.
For this case, as shown in fig. 2, the method for generating a multi-view video may include:
s201, shooting a target object through each camera at each preset visual angle to obtain a video at each preset visual angle;
in order to obtain a multi-view video, the target object can be shot simultaneously through each camera positioned at each preset view angle to obtain the video at each preset view angle, so that the video frames in the video at each preset view angle can be ensured to be synchronous video frames, and the problem of video frame discontinuity when the terminal switches view angles is avoided. The target object is an object in the multi-view video, for example, when the multi-view video is a video of a basketball game, the target object is a game scene of a player in the basketball game, that is, a basketball court and a basketball player therein.
The format of the video of each preset view angle obtained by the camera may be a YUV format, an HSL format, an HSV format, and the like, which is not specifically limited herein.
S202, constructing description information for representing the corresponding relation between the video of each preset visual angle and the visual angle thereof;
after obtaining the video of each preset view angle, the preset server may construct description information, where the description information may represent a correspondence between the video of each preset view angle and the view angle thereof. Thus, according to the description information, the terminal can determine the preset view video corresponding to each preset view.
For example, the preset angle video Y1 corresponds to an angle of view of 0 °, the preset angle video Y2 corresponds to an angle of view of 90 °, the preset angle video Y3 corresponds to an angle of view of 180 °, and the preset angle video Y4 corresponds to an angle of view of 270 °, and the preset server may construct the description information indicating the correspondence relationship as shown in the following table:
| preset viewing angle video | Angle of view |
| Y1 | 0 degree angle of view |
| Y2 | Angle of view of 90 deg |
| Y3 | Angle of view of 180 deg |
| Y4 | Angle of view of 270 deg |
The format of the description information may be a file in a format such as MPD, and is not specifically limited herein.
S203, compressing the video of each preset visual angle to obtain a path of video stream including the video of each preset visual angle;
the target object is shot through each camera, the video of each preset visual angle is obtained, and meanwhile the audio of the target object can be recorded through the audio acquisition equipment. In order to avoid the problem of audio discontinuity when the terminal switches the view angles, after the video of each preset view angle is obtained, the preset server can align the video frames in the video of each preset view angle, and encode the video of each preset view angle by using the audio, that is, the video of each preset view angle is encoded by using the same audio, so as to obtain the video of each preset view angle after encoding. Therefore, the video frames in the video of each preset visual angle after the coding processing can be ensured to be synchronous video frames, and the problems of video frame incoherence and audio incoherence when the terminal switches the visual angles are avoided.
After the video of each preset visual angle after the coding processing is obtained, the preset server can compress the video of each preset visual angle to obtain one path of video stream including each preset visual angle video, namely, the multi-visual angle video, so that the multi-visual angle video including each preset visual angle video can be conveniently stored in the same CDN server by the preset server, when the terminal needs to acquire the preset visual angle video in the multi-visual angle video from the CDN server, the preset visual angle video does not need to be acquired from a plurality of CDN servers, and the time for downloading the preset visual angle video from the CDN server can be reduced.
The specific mode of the compression process may be a mode of a video coding standard such as h.264, h.265, etc., and is not limited specifically herein. The format of each preset view video after the compression processing may be fmp4 format, TS format, webm format, etc., and is not limited in particular.
And S204, storing the description information and the video stream to a Content Delivery Network (CDN) server.
After the description information and one path of video stream including the video of each preset view are obtained, the preset server can store the description information and the video stream into the CDN server, so that when the terminal needs to play the preset view video in the multi-view video, the description information and the video of the preset view can be obtained from the same CDN server, and time required for downloading the preset view video from the CDN server can be reduced.
Therefore, in the scheme provided by the embodiment of the invention, the multi-view video is generated in advance by the preset server, and the target object can be shot by each camera at each preset view angle at the same time to obtain the video at each preset view angle; constructing description information for representing the corresponding relation between the video of each preset visual angle and the visual angle; compressing the video of each preset visual angle to obtain a path of video stream comprising the video of each preset visual angle; and storing the description information and the video stream to a Content Delivery Network (CDN) server. Therefore, when the terminal needs to acquire the preset view angle video, the preset view angle video does not need to be acquired from the plurality of CDN servers, and the time for downloading the preset view angle video from the CDN servers can be reduced.
As an implementation manner of the embodiment of the present invention, the step of acquiring the second view video corresponding to the target view from the decoded first view video may include:
determining a second visual angle video corresponding to the target visual angle according to the corresponding relation represented by the description information; and acquiring a second visual angle video from the decoded first visual angle video.
When the multi-view video is acquired, the terminal may acquire description information indicating a corresponding relationship between a video of each preset view and a view thereof from the CDN server, so that after the target view is determined, the terminal may determine a second view video corresponding to the target view according to the description information.
For example, the correspondence represented by the description information is shown in the following table:
| preset viewing angle video | Angle of view |
| Y*1 | Angle of view of 45 deg |
| Y*2 | Angle of view of 135 deg |
| Y*3 | Angle of view of 225 ° |
| Y*4 | 315 deg. angle of view |
In general, the first view video may correspond to a view of 0 °. When the view switching instruction received by the terminal is "switching to a view with a view difference of 45 degrees corresponding to the first view video", it indicates that the video played by the player is switched from the first view video to a video with a view difference of 45 degrees corresponding to the first view video, the terminal may determine that the target view is a view of 45 degrees according to the 0 degree view corresponding to the first view video and the view switching instruction, and then the terminal may determine that the second view corresponding to the target view is the preset view video Y1 according to the correspondence shown in the above table.
Therefore, after the second view video is determined, the terminal can accurately acquire the second view video from the decoded first view video.
It can be understood that the first type of view video is also obtained from the multi-view video by the terminal according to the correspondence indicated by the description information, and the specific obtaining manner is the same as the manner of obtaining the second view video, and is not described herein again.
Therefore, in the scheme provided by the embodiment of the present invention, the terminal may determine the second view video corresponding to the target view according to the corresponding relationship indicated by the description information, and further acquire the second view video from the decoded first type of view video. Therefore, the terminal can quickly and accurately determine the first type of view angle video and the second type of view angle video according to the corresponding relation represented by the description information.
As an implementation manner of the embodiment of the present invention, the multi-view video may be downloaded in advance from a CDN server for a terminal and cached locally.
The terminal can download the multi-view video from the CDN server in advance and buffer the multi-view video in the local, so that when a multi-view video playing instruction sent by a user is received, the terminal does not need to acquire the first view video and the first type of view video from the CDN server, and only needs to acquire the first view video and the first type of view video from the multi-view video cached in the local, thereby reducing the time required for acquiring the first view video and the first type of view video, further reducing the time delay of video playing when the user switches view angles, and improving the watching experience of the user.
Therefore, in the scheme provided by the embodiment of the invention, the terminal can download the multi-view video from the CDN server in advance and cache the multi-view video in the local, so that the terminal only needs to acquire the first view video and the first type of view video from the locally cached multi-view video, which can reduce the time required for acquiring the first view video and the first type of view video, thereby reducing the time delay of video playing when the user switches views, and improving the viewing experience of the user.
The following describes a playing method of a multi-view video provided by an embodiment of the present invention with reference to fig. 3. As shown in fig. 3, in order to generate a multi-view video, a shooting target may be shot by cameras located at a plurality of preset views, and videos at a plurality of preset views are obtained, and the video streams YUV1, YUV2, and YUV3 … YUVn in the YUV format are described as an example in fig. 3. After the videos of the multiple preset views are obtained, the videos of the multiple preset views are encoded and compressed by an encoder in a preset server, so that one path of video stream including the video of each preset view is obtained, and the format of the one path of video stream may be a CMAF format or other formats. Then, one path of video stream can be stored in the CDN server, when a user sends a multi-view video playing instruction, a data download engine in the terminal can obtain the first view video and the first type of view video corresponding to the first view video from the CDN server, then decode the first view video and the first type of view video by a decoding engine of the terminal, and render and play the decoded video by a rendering engine of the terminal for the user to watch.
Corresponding to the playing method of the multi-view video, the embodiment of the invention also provides a playing device of the multi-view video. The following describes a playing device for multi-view video provided by an embodiment of the present invention.
As shown in fig. 4, a playing apparatus of a multi-view video, the apparatus comprising:
a player creating module 401, configured to create a player when a multi-view video playing instruction is obtained, and obtain, by the player, a first view video in a multi-view video corresponding to the multi-view video playing instruction;
wherein the multi-view video includes videos of a plurality of preset views.
A video playing module 402, configured to decode the first view video, and play the decoded first view video through the player;
a first alternative video acquiring module 403, configured to acquire a first type of view video corresponding to the first view video in the multi-view video while acquiring the first view video;
the view switching module 404 is configured to stop playing the first view video when a view switching instruction is obtained, and play a second view video in the first type of view video through the player.
As can be seen, in the scheme provided by the embodiment of the present invention, when a multi-view video playing instruction is obtained, a terminal may create a player, and obtain, by the player, a first view video in the multi-view video corresponding to the multi-view video playing instruction, where the multi-view video includes videos at a plurality of preset views; decoding the first visual angle video, and playing the decoded first visual angle video through a player; the method comprises the steps that when a first visual angle video is obtained, a first type of visual angle video corresponding to the first visual angle video in the multi-visual angle video is obtained; and when the visual angle switching instruction is acquired, stopping playing the first visual angle video, and playing a second visual angle video of the first type of visual angle video through the player.
The terminal can establish a player when acquiring a multi-view video playing instruction, and simultaneously acquire a first type of view angle video when acquiring a first view angle video, and the terminal does not need to reestablish the player when receiving a view angle switching instruction, and can acquire a first type of view angle video corresponding to the first view angle video in the multi-view angle video from an established player second view angle video without reestablishing the player.
As an implementation manner of the embodiment of the present invention, the first alternative video obtaining module 403 may include:
an alternative video determining submodule (not shown in fig. 4) configured to obtain, according to a preset video loading rule, a first type of view video corresponding to the first view video from the multi-view video;
a video decoding sub-module (not shown in fig. 4) configured to perform decoding processing on the first type of view video to obtain a decoded first type of view video;
the view switching module 404 may include:
a target view angle determining sub-module (not shown in fig. 4) configured to determine a target view angle corresponding to the view angle switching instruction;
and a target video determining sub-module (not shown in fig. 4) configured to acquire a decoded second view video corresponding to the target view from the decoded first view video, and play the second view video.
As an implementation manner of the embodiment of the present invention, the apparatus may further include:
a second alternative video obtaining module (not shown in fig. 4) configured to, when the second view video is played, obtain, according to the video loading rule, a first type of view video corresponding to the second view video from the multi-view video, and return to the decoding process on the first type of view video.
As an implementation manner of the embodiment of the present invention, the alternative video determination sub-module may include:
an alternative video determining unit (not shown in fig. 4) configured to determine, as a first type of view video, a preset view video corresponding to a view whose difference between views corresponding to the first view video is within a preset angle range;
an alternative video acquiring unit (not shown in fig. 4) configured to acquire the first type of view video from the multi-view video.
As an implementation manner of the embodiment of the present invention, the multi-view video is generated in advance by a multi-view video generating module (not shown in fig. 4) by a preset server;
as shown in fig. 5, the multi-view video generation module may include:
the video shooting submodule 501 is configured to shoot a target object through each camera located at each preset view angle at the same time, so as to obtain a video at each preset view angle;
a description information construction sub-module 502, configured to construct description information used for representing a corresponding relationship between the video of each preset view and its view;
the video compression submodule 503 is configured to compress the video of each preset view to obtain a video stream including the video of each preset view;
and a video storage sub-module 504, configured to store the description information and the video stream to a content delivery network CDN server.
As an implementation manner of the embodiment of the present invention, the target video determination sub-module includes:
a target video determining unit (not shown in fig. 4) configured to determine, according to the correspondence relationship indicated by the description information, a second view video corresponding to the target view;
and a target video acquiring unit (not shown in fig. 4) configured to acquire the second view video from the decoded first view video.
As an implementation manner of the embodiment of the present invention, the multi-view video is downloaded by the terminal from a CDN server in advance and cached locally.
The embodiment of the present invention further provides a terminal, as shown in fig. 6, including a processor 601, a communication interface 602, a memory 603, and a communication bus 604, where the processor 601, the communication interface 602, and the memory 603 complete mutual communication through the communication bus 604,
a memory 603 for storing a computer program;
the processor 601 is configured to implement the steps of the method for playing the multi-view video according to any of the embodiments when executing the program stored in the memory 503.
Therefore, in the scheme provided by the embodiment of the invention, when the terminal acquires the multi-view video playing instruction, the player can be created, and the player acquires the first view angle video in the multi-view video corresponding to the multi-view video playing instruction, wherein the multi-view video comprises videos of a plurality of preset view angles; decoding the first visual angle video, and playing the decoded first visual angle video through a player; the method comprises the steps that when a first visual angle video is obtained, a first type of visual angle video corresponding to the first visual angle video in the multi-visual angle video is obtained; and when the visual angle switching instruction is acquired, stopping playing the first visual angle video, and playing a second visual angle video in the first type of visual angle videos through the player.
The terminal can establish a player when acquiring a multi-view video playing instruction, and simultaneously acquire a first type of view angle video when acquiring a first view angle video, and the terminal does not need to reestablish the player when receiving a view angle switching instruction, and can acquire a first type of view angle video corresponding to the first view angle video in the multi-view angle video from an established player second view angle video without reestablishing the player.
The communication bus mentioned in the above terminal may be a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. The communication bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown, but this does not mean that there is only one bus or one type of bus.
The communication interface is used for communication between the terminal and other equipment.
The Memory may include a Random Access Memory (RAM) or a non-volatile Memory (non-volatile Memory), such as at least one disk Memory. Optionally, the memory may also be at least one memory device located remotely from the processor.
The Processor may be a general-purpose Processor, and includes a Central Processing Unit (CPU), a Network Processor (NP), and the like; the device can also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, a discrete Gate or transistor logic device, or a discrete hardware component.
In another embodiment of the present invention, there is also provided a computer-readable storage medium, having stored therein instructions, which when run on a computer, cause the computer to execute the method for playing a multiview video according to any one of the above embodiments.
As can be seen, in the solution provided in the embodiment of the present invention, when a computer program stored in a computer-readable storage medium is executed by a processor, a player may be created when a multi-view video playing instruction is obtained, and a first view video in the multi-view video corresponding to the multi-view video playing instruction is obtained through the player, where the multi-view video includes videos at a plurality of preset views; decoding the first visual angle video, and playing the decoded first visual angle video through a player; the method comprises the steps that when a first visual angle video is obtained, a first type of visual angle video corresponding to the first visual angle video in the multi-visual angle video is obtained; and when the visual angle switching instruction is acquired, stopping playing the first visual angle video, and playing a second visual angle video in the first type of visual angle videos through the player.
The terminal can establish a player when acquiring a multi-view video playing instruction, and simultaneously acquire a first type of view angle video when acquiring a first view angle video, and the terminal does not need to reestablish the player when receiving a view angle switching instruction, and can acquire a first type of view angle video corresponding to the first view angle video in the multi-view angle video from an established player second view angle video without reestablishing the player.
In another embodiment of the present invention, there is also provided a computer program product containing instructions, which when run on a computer, causes the computer to execute the method for playing a multi-view video according to any one of the above embodiments.
As can be seen, in the scheme provided in the embodiment of the present invention, when a computer program product including an instruction runs on a computer, a player may be created when a multi-view video playing instruction is obtained, and a first view video in the multi-view video corresponding to the multi-view video playing instruction is obtained through the player, where the multi-view video includes videos at a plurality of preset views; decoding the first visual angle video, and playing the decoded first visual angle video through a player; the method comprises the steps that when a first visual angle video is obtained, a first type of visual angle video corresponding to the first visual angle video in the multi-visual angle video is obtained; and when the visual angle switching instruction is acquired, stopping playing the first visual angle video, and playing a second visual angle video corresponding to the visual angle switching instruction in the first type of visual angle video through the player.
The terminal can establish a player when acquiring a multi-view video playing instruction, and simultaneously acquire a first type of view angle video when acquiring a first view angle video, and the terminal does not need to reestablish the player when receiving a view angle switching instruction, and can acquire a first type of view angle video corresponding to the first view angle video in the multi-view angle video from an established player second view angle video without reestablishing the player.
In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the invention to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website site, computer, server, or data center to another website site, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., floppy Disk, hard Disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., Solid State Disk (SSD)), among others.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
All the embodiments in the present specification are described in a related manner, and the same and similar parts among the embodiments may be referred to each other, and each embodiment focuses on the differences from the other embodiments.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.
Claims (10)
1. A method for playing a multi-view video, the method comprising:
when a multi-view video playing instruction is acquired, a player is created, and a first view video in the multi-view video corresponding to the multi-view video playing instruction is acquired through the player, wherein the multi-view video comprises videos of a plurality of preset views;
decoding the first visual angle video, and playing the decoded first visual angle video through the player;
acquiring a first type of visual angle video corresponding to the first visual angle video in the multi-visual angle video while acquiring the first visual angle video;
and when a visual angle switching instruction is acquired, stopping playing the first visual angle video, and playing a second visual angle video in the first type of visual angle videos through the player.
2. The method according to claim 1, wherein the step of obtaining the first type of view video corresponding to the first view video in the multi-view video comprises:
acquiring a first type of visual angle video corresponding to the first visual angle video from the multi-visual angle video according to a preset video loading rule;
decoding the first type of view video to obtain a decoded first type of view video;
the step of playing, by the player, a second view video of the first view videos includes:
determining a target visual angle corresponding to the visual angle switching instruction;
and acquiring a decoded second visual angle video corresponding to the target visual angle from the decoded first type of visual angle video, and playing the second visual angle video.
3. The method of claim 2, wherein when playing the second-view video, the method further comprises:
and acquiring a first type of view video corresponding to the second view video from the multi-view video according to the video loading rule, and returning to the step of decoding the first type of view video.
4. The method according to claim 2 or 3, wherein the step of obtaining the first type of view video corresponding to the first view video from the multi-view video according to a preset video loading rule comprises:
determining a preset visual angle video corresponding to a visual angle of which the difference value of the visual angle corresponding to the first visual angle video is within a preset angular range as a first type of visual angle video;
and acquiring the first type of visual angle video from the multi-visual angle video.
5. The method according to claim 2 or 3, wherein the multi-view video is pre-generated by a preset server;
the method for generating the multi-view video comprises the following steps:
shooting a target object through each camera positioned at each preset visual angle simultaneously to obtain a video of each preset visual angle;
constructing description information for representing the corresponding relation between the video of each preset visual angle and the visual angle thereof;
compressing the video of each preset visual angle to obtain a path of video stream comprising the video of each preset visual angle;
and storing the description information and the video stream to a Content Delivery Network (CDN) server.
6. The method according to claim 5, wherein the step of obtaining the second view video corresponding to the target view from the decoded first view video comprises:
determining a second visual angle video corresponding to the target visual angle according to the corresponding relation represented by the description information;
and acquiring the second visual angle video from the decoded first visual angle video.
7. The method of any of claims 1-3, wherein the multi-view video is downloaded by the terminal from a CDN server in advance and cached locally.
8. A device for playing a multi-view video, the device comprising:
the device comprises a player creating module, a playing module and a playing module, wherein the player creating module is used for creating a player when a multi-view video playing instruction is obtained, and obtaining a first view video in the multi-view video corresponding to the multi-view video playing instruction through the player, wherein the multi-view video comprises videos of a plurality of preset views;
the video playing module is used for decoding the first visual angle video and playing the decoded first visual angle video through the player;
the first alternative video acquisition module is used for acquiring a first type of view videos corresponding to the first view video in the multi-view videos while acquiring the first view video;
and the visual angle switching module is used for stopping playing the first visual angle video when a visual angle switching instruction is acquired, and playing a second visual angle video in the first type of visual angle videos through the player.
9. A terminal is characterized by comprising a processor, a communication interface, a memory and a communication bus, wherein the processor and the communication interface are used for realizing the communication between the processor and the memory through the communication bus;
a memory for storing a computer program;
a processor for implementing the method steps of any of claims 1 to 7 when executing a program stored in the memory.
10. A computer-readable storage medium, characterized in that a computer program is stored in the computer-readable storage medium, which computer program, when being executed by a processor, carries out the method steps of any one of claims 1 to 7.
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