CN113891111B - Live broadcasting method, device, medium and equipment of billion pixel video - Google Patents

Live broadcasting method, device, medium and equipment of billion pixel video Download PDF

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Publication number
CN113891111B
CN113891111B CN202111149384.XA CN202111149384A CN113891111B CN 113891111 B CN113891111 B CN 113891111B CN 202111149384 A CN202111149384 A CN 202111149384A CN 113891111 B CN113891111 B CN 113891111B
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video stream
resolution
video
paths
camera
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CN113891111A (en
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赵月峰
袁潮
温建伟
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Beijing Zhuohe Technology Co Ltd
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Beijing Zhuohe Technology Co Ltd
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    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/234—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs
    • H04N21/23424—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs involving splicing one content stream with another content stream, e.g. for inserting or substituting an advertisement
    • H—ELECTRICITY
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    • 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
    • H04N21/23412—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs for generating or manipulating the scene composition of objects, e.g. MPEG-4 objects
    • H—ELECTRICITY
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    • 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
    • H04N21/234309—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 transcoding between formats or standards, e.g. from MPEG-2 to MPEG-4 or from Quicktime to Realvideo
    • H—ELECTRICITY
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    • 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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    • H04N21/239—Interfacing the upstream path of the transmission network, e.g. prioritizing client content requests
    • H04N21/2393—Interfacing the upstream path of the transmission network, e.g. prioritizing client content requests involving handling client requests
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    • H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs
    • H04N21/44012—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs involving rendering scenes according to scene graphs, e.g. MPEG-4 scene graphs
    • H—ELECTRICITY
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    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs
    • H04N21/44016—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs involving splicing one content stream with another content stream, e.g. for substituting a video clip
    • H—ELECTRICITY
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    • H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs
    • H04N21/4402—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display
    • H04N21/440218—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display by transcoding between formats or standards, e.g. from MPEG-2 to MPEG-4
    • H—ELECTRICITY
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    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs
    • H04N21/4402—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display
    • H04N21/440263—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display by altering the spatial resolution, e.g. for displaying on a connected PDA
    • 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
    • H04N21/47—End-user applications
    • H04N21/472—End-user interface for requesting content, additional data or services; End-user interface for interacting with content, e.g. for content reservation or setting reminders, for requesting event notification, for manipulating displayed content
    • H04N21/4728—End-user interface for requesting content, additional data or services; End-user interface for interacting with content, e.g. for content reservation or setting reminders, for requesting event notification, for manipulating displayed content for selecting a Region Of Interest [ROI], e.g. for requesting a higher resolution version of a selected region
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/222—Studio circuitry; Studio devices; Studio equipment
    • H04N5/262—Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects
    • H04N5/265—Mixing

Abstract

This document relates to a live method, apparatus, medium and device for billion pixel video. The method is applied to the server and comprises the following steps: acquiring multiple paths of camera videos shot by an array camera, wherein each path of camera video comprises a high-resolution video stream and a low-resolution video stream; decoding all low-resolution video streams in the multi-path camera video, and fusing and splicing the low-resolution video streams into a first video stream; receiving a play request of a client, wherein the play request comprises a play area and a play resolution; when the resolution of the first video stream corresponding to the playing area is smaller than the playing resolution, determining K paths of camera videos corresponding to the playing area, and determining the high-resolution video stream of N paths of camera videos from the K paths of camera videos as a target video stream; decoding a target video stream, and replacing the picture content of the first video stream corresponding to the playing area by using the picture content of the target video stream; and rendering the replaced picture, generating a second video stream, and sending the second video stream to the client. Video pictures of a live larger pixel camera can be realized under the condition of the existing decoding capability.

Description

Live broadcasting method, device, medium and equipment of billion pixel video
Technical Field
This document relates to the field of live video, and more particularly to a live method, apparatus, medium and device for billion pixel video.
Background
In the related art, a server acquires video streams shot by all cameras of an array camera, decodes all the video streams, then splices video frame images with the same time stamp to obtain large canvas images with hundred million-level pixels, generates the video streams based on the large canvas images, and provides the video streams for a client to watch.
However, as the number of cameras of the array camera increases, the resolution of the photographed video increases, and the decoding pressure of the server is required to be higher. However, the upper limit of the decoding capability of the video fusion server can only reach the level of hundred million pixels, and when the number of cameras of the array camera exceeds the number of videos corresponding to the upper limit of the decoding capability of the video fusion server, the video fusion server cannot provide corresponding services.
Under the prior art condition, the decoding pressure of the video fusion server is reduced, so that the video fusion server supports array cameras with more camera lenses under the same decoding condition, and the live broadcast of billions-level pixel video and even higher pixel video is a technical problem to be solved.
Disclosure of Invention
To overcome the problems in the related art, provided herein is a live method, apparatus, medium, and device for billion pixel video.
According to a first aspect herein, there is provided a live method of billion pixel video, for use in a server, comprising:
acquiring multiple paths of camera videos shot by an array camera, wherein each path of camera video comprises a high-resolution video stream and a low-resolution video stream;
decoding all low-resolution video streams in the multi-path camera video, and fusing and splicing the low-resolution video streams into a first video stream;
receiving a play request of a client, wherein the play request comprises a play area and a play resolution;
when the resolution of the first video stream corresponding to the playing area is smaller than the playing resolution, determining K paths of camera videos corresponding to the playing area, and determining the high-resolution video stream of N paths of camera videos from the K paths of camera videos as a target video stream;
decoding the target video stream, and replacing the picture content of the first video stream corresponding to the playing area with the picture content of the target video stream;
rendering the replaced picture, generating a second video stream, and sending the second video stream to the client, wherein N is more than or equal to 1 and less than or equal to K.
Based on the foregoing, in some embodiments, the live method of billion pixel video further comprises:
when the resolution of the first video stream corresponding to the playing area is larger than or equal to the playing resolution, cutting out the picture content corresponding to the playing area from the picture content of the first video stream, generating a third video stream and sending the third video stream to the client.
Based on the foregoing, in some embodiments, the live method of billion pixel video further comprises:
after receiving the play request of the client, starting a preset M paths of decoders, wherein M is more than or equal to 2, and the M paths of decoders are used for decoding the target video stream.
Based on the foregoing, in some embodiments, the determining, from the K paths of camera videos, the high-resolution video stream of the N paths of camera videos as the target video stream includes:
when K is less than or equal to M, determining the high-resolution video stream of the K paths of camera videos as a target video stream, wherein N=K;
and when K > M, determining the high-resolution video stream of M paths of camera videos from the K paths of camera videos as a target video stream, wherein N=M.
Based on the above scheme, in some embodiments, when K > M, determining, from the K-way camera videos, that the high-resolution video stream of the M-way camera video is the target video stream includes:
and determining the center point of the playing area according to the coordinates of the playing area, and determining the high-resolution video stream of M paths of camera videos with the closest video picture center point to the center point of the playing area as a target video stream.
Based on the above, in some embodiments, when n=m, all of the M decoders decode N paths of the target video;
and when N < M, decoding N paths of target videos by N paths of decoders in the M paths of decoders, and enabling the rest decoders to enter an idle state.
According to another aspect herein, there is provided a live video device for billions of pixels, comprising:
the camera video acquisition module is used for acquiring multiple paths of camera videos shot by the array camera, wherein each path of camera video comprises a high-resolution video stream and a low-resolution video stream;
the first video stream fusion module is used for decoding all low-resolution video streams in the multi-path camera video, and fusing and splicing the low-resolution video streams into a first video stream;
the system comprises a play request receiving module, a play request processing module and a play request processing module, wherein the play request receiving module is used for receiving a play request of a client, and the play request comprises a play area and a play resolution;
the target video stream determining module is used for determining K paths of camera videos corresponding to the playing area when the resolution of the first video stream corresponding to the playing area is smaller than the playing resolution, and determining high-resolution video streams of N paths of camera videos from the K paths of camera videos as target video streams;
a replacing module, configured to decode the target video stream, and replace the picture content of the first video stream corresponding to the playing area with the picture content of the target video stream;
and the sending module is used for carrying out fusion rendering on the replaced pictures, generating a second video stream and sending the second video stream to the client.
Based on the foregoing, in some embodiments, the live device of billion pixel video further comprises:
and the decoder starting module is used for starting a preset M paths of decoders after the playing request of the client is received, wherein M is more than or equal to 2, and the M paths of decoders are used for decoding the target video stream.
According to another aspect herein, there is provided a computer readable storage medium having stored thereon a computer program which when executed performs the steps of a live method of billion pixel video.
According to another aspect herein, there is provided a computer apparatus comprising a processor, a memory and a computer program stored on the memory, the processor implementing the steps of a live method of billion pixel video when the computer program is executed.
The method comprises the steps of acquiring multiple paths of camera videos shot by an array camera, decoding low-resolution video streams in the multiple paths of camera videos, and fusing and splicing the low-resolution video streams into a first video stream; after receiving a playing request of a client, when the resolution of a first video stream corresponding to a playing area is smaller than the playing resolution, determining that a high-resolution video stream of N paths of camera videos is a target video stream from K paths of camera videos corresponding to the playing area, replacing picture content in the first video corresponding to the playing area by using the high-resolution target video stream, and then sending the picture content to the client. The method can realize live broadcasting of video pictures of a camera with larger pixels and even high-definition video pictures with billions of pixels under the condition of the existing decoding capability.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention as claimed.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure, illustrate and explain the disclosure, and do not constitute a limitation on the disclosure. In the drawings:
fig. 1 is a flow chart illustrating a method of live video of billions of pixels, according to an example embodiment.
Fig. 2 is a schematic diagram of a first video stream shown according to an exemplary embodiment.
Fig. 3 is a block diagram of a live device of billion pixel video, shown according to an example embodiment.
Fig. 4 is a block diagram of a live device of billion pixel video, shown according to an example embodiment.
FIG. 5 is a block diagram of a computer device for live video of billions of pixels, shown in accordance with an exemplary embodiment
Detailed Description
For the purposes of making the objects, technical solutions and advantages of the embodiments herein more apparent, the technical solutions in the embodiments herein will be clearly and completely described below with reference to the accompanying drawings in the embodiments herein, and it is apparent that the described embodiments are some, but not all, embodiments herein. All other embodiments, based on the embodiments herein, which a person of ordinary skill in the art would obtain without undue burden, are within the scope of protection herein. It should be noted that, without conflict, the embodiments and features of the embodiments herein may be arbitrarily combined with each other.
In order to support an array camera with more camera shots under the same decoding conditions by reducing the decoding pressure of the video fusion server under the prior art conditions, a live method of billion pixel video is provided herein.
Fig. 1 is a flow chart illustrating a method of live video of billions of pixels, according to an example embodiment. Referring to fig. 1, the live broadcasting method of billion pixel video at least includes steps S11 to S16, and is described in detail as follows:
in step S11, multiple paths of camera videos shot by the array camera are acquired, where each path of camera video includes a high resolution video stream and a low resolution video stream.
The array camera comprises a plurality of cameras, the cameras are arranged according to a certain arrangement sequence, high-definition videos of a part of areas in a target view field are respectively obtained, and finally a video fusion server fuses multiple paths of video streams obtained by the cameras into a large-scale high-definition video stream, and the large-scale high-definition video stream is provided for a client.
For example, in the existing live broadcast technology, the resolution of a video stream shot by a single camera can reach 4K; the resolution of the display device of the general client is 4K or lower, obviously, when the client requests to watch the content of the multi-channel video, the resolution after the requested multi-channel 4K video stream is fused is far greater than the display resolution of the client, so that the calculation capacity of the video fusion server is wasted; moreover, due to the limitation of the decoding capability of the video fusion server, the number of video streams which can be decoded by the video fusion server is limited, and video of the array camera with the fixed camera number can only be live broadcast under the condition that the video fusion server is not increased.
Thus, herein, the server obtains multiple paths of camera videos captured by the array camera, each path of camera video including a high resolution video stream and a low resolution video stream.
In an embodiment, when each camera in the array camera acquires the video content of the corresponding area, a high-resolution video stream and a low-resolution video stream with the same image content and different image resolutions can be generated simultaneously. For example, the high-resolution video stream is 4K (3840×2160), and the low-resolution video stream is 1080P (1920×1080). The server directly receives the high-resolution video stream and the low-resolution video stream of the multi-path camera video from the array camera, so that the load of the server is reduced.
In an embodiment, each camera in the array camera only outputs a video stream with original resolution, and the server samples the video stream with original resolution after receiving the video stream with original resolution to generate a low-resolution video stream corresponding to the video stream with original resolution. And receiving the video stream with the original resolution of the array camera, processing the video stream with the original resolution according to the specific setting of the video stream, generating a corresponding low-resolution video stream, and reducing the configuration work of the array camera.
In practice, the resolution of the low resolution video stream may be determined based on the decoding capability of the video server and the number of passes of the total camera video.
For example, the decoding capability of the video fusion server is 8K (7680×4320), and the number of cameras of the array camera is 16, and the resolution of the low resolution video stream can be set to 1080P. If the number of array cameras is 36, the resolution of the low resolution video stream can be set to 720P (1280×720).
Step S12, decoding all low-resolution video streams in the multi-path camera video, and fusing and splicing the low-resolution video streams into a first video stream.
After receiving the multi-path camera video, the server identifies and stores all high-resolution video streams. And decoding all the low-resolution videos, and fusing and splicing the low-resolution videos into a first video stream.
The first video stream comprises images of all view field contents, and the low-resolution video stream is used for fusion, so that the occupation of resources such as a video fusion server decoder, a video memory, a memory and the like can be effectively reduced.
In an embodiment, the video fusion server may provide the fused first video stream to the client, and the client displays the processed first video stream according to the performance of its own display device, and displays the content of all fields of view, so that the client user may select the region of interest. The processing performance of the client is exerted, and the pressure of the server is reduced.
In an embodiment, the video fusion server may determine, according to the information of the client, a performance of the client display device, downsample the first video stream, and provide the downsampled first video stream to the client. The requirement of the client on the display equipment is reduced, and the transmission speed of video data is improved.
Step S13, receiving a play request of the client, wherein the play request comprises a play area and a play resolution.
The client selects from the images of all view field contents according to the interested contents, and sends the selection result to the server, and requests the server to play the video in the selected area. In practical application, the aspect ratio of the area selected by the client can be limited, and the area selected by the client is the playing area; and determining an inscribed rectangle in the selected area of the client according to the selected area of the client, and determining a specific playing area.
The playback resolution may be the highest resolution supported by the client display device or may be a resolution specified by the client.
Step S14, if the resolution of the first video stream corresponding to the playing area is smaller than the playing resolution, determining K paths of camera videos corresponding to the playing area, and determining the high-resolution video stream of N paths of camera videos from the K paths of camera videos as a target video stream.
Fig. 2 is a schematic diagram of a first video stream shown according to an exemplary embodiment. Referring to fig. 2, the first video stream is a video stream obtained by fusing 16 low resolution video streams photographed by an array camera. The resolution of each low-resolution video stream is 1080P (1920×1080). Let the playback area requested by the client be as shown in fig. a, the playback resolution of the client be 4K (3840×2160).
When the playing area requested by the client is a, the pixel area corresponding to the area a is 3072×1728, that is, the resolution of the first video stream corresponding to the playing area is 3072×1728, which is smaller than the playing resolution 3840×2160. Obviously, the image content corresponding to the playing area in the first video stream cannot meet the requirement of the playing resolution, and the video content in the playing area needs to be replaced by the content of the high-resolution video stream to display clearer content to the client.
Referring to fig. 2, the playing area a corresponds to 9 paths of video streams, namely, video 1, video 2, video 3, video 5, video 6, video 7, video 9, video 10 and video 11. I.e. k=9.
And the high-resolution video stream corresponding to all K paths of camera videos can be used as a target video stream, all the K paths of high-resolution video streams are used for replacing all the contents in the playing area, for example, all 9 paths of video streams are decoded, and after fusion and splicing, the contents corresponding to the playing area are cut out and provided for a client.
And meanwhile, decoding the K paths of high-resolution video streams, wherein the decoding capability of the server is possibly exceeded, the server can select N paths of the K paths of high-resolution video streams, and the corresponding contents in the N paths of high-resolution video streams are used for replacing the contents in the playing area. For example, the server may support decoding 4 video streams simultaneously, and may select a high resolution video stream corresponding to the 4 camera video, to replace content in the playing area. As shown, the high resolution video streams corresponding to video 6, video 7, video 10, and video 11 may be selected as the target video streams.
Step S15, decoding the target video stream, and replacing the picture content of the first video stream corresponding to the playing area with the picture content of the target video stream.
And decoding the target video stream, and replacing corresponding content in the playing area by using the high-resolution video stream of each path of video.
For example, referring to fig. 2, high-resolution video streams corresponding to video 6, video 7, video 10, and video 11 and low-resolution video streams corresponding to video 1, video 2, video 3, video 5, and video 9 are spliced and fused, and then video streams corresponding to a playing area a are cut out from the fused video.
And the high-resolution video streams corresponding to the video 6, the video 7, the video 10 and the video 11 can be cut according to the playing area, and the cut video streams are spliced and fused to replace the corresponding content in the first video stream in the playing area.
And step S16, rendering the replaced picture, generating a second video stream and sending the second video stream to the client.
And after the replaced picture is rendered, a second video stream can be generated, and the second video stream is sent to the client. And displaying the video picture corresponding to the playing area on the display equipment of the client. Therefore, when the resolution of the video picture of the first video stream corresponding to the playing area requested by the client is smaller than the playing resolution requested by the client, the image content of the high-resolution video stream is used for replacing the image content in the corresponding playing area, the user experience is improved, the decoding pressure of the server is reduced, and the live broadcasting of the billion-pixel video is realized under the condition that the existing server configuration is unchanged.
In an exemplary embodiment, the live method of billion pixel video further comprises: if the resolution of the first video stream corresponding to the playing area is greater than or equal to the playing resolution, cutting out the picture content corresponding to the playing area from the picture content of the first video stream, generating a third video stream and sending the third video stream to the client.
When the playing area includes multiple paths of video contents, the resolution of the first video stream corresponding to the playing area is greater than or equal to the playing resolution, for example, the playing area includes multiple paths of video contents, as shown in the playing area B in fig. 2, if the resolution of each path of low-resolution video stream is 1080P (1920×1080), the playing resolution of the client is 4K (3840×2160), the playing device of the client can only display the picture content of at most 4 paths of low-resolution video streams with 1080P (1920×1080), and if the area of the playing area is greater than or equal to the display area of 4 paths of video, the resolution of the first video stream corresponding to the playing area can be determined to be greater than or equal to the playing resolution, and at this time, only the fused first video streams need to be cut out, the content corresponding to the playing area is cut out, and a third video stream is generated and provided for the client.
It should be noted that the actual resolution of the second video stream or the third video stream may be greater than the playing resolution of the client, and the server or the client needs to perform downsampling processing on the second video stream or the third video stream, so that the resolution of the second video stream or the third video stream is adjusted to the playing resolution, so that all image contents corresponding to the playing area can be displayed on the client display device.
In an exemplary embodiment, the live method of billion pixel video further comprises:
after receiving a play request of a client, starting a preset M-path decoder, wherein M is more than or equal to 2, and the M-path decoder is used for decoding a target video stream.
Due to server performance limitation, when the number of high-resolution video streams to be decoded is relatively large, the decoding capability of the server is exceeded, and in order to provide better decoding service, the maximum number of paths of decoding can be preset according to the decoding capability of the server, for example, 2 paths, 4 paths, or more paths of decoders can be set. The preset decoder number of lanes is described herein as m=4 lanes.
After receiving the play request of the client, starting a preset 4-way decoder. When the resolution of the first video stream corresponding to the playing area is smaller than the playing resolution, determining K paths of camera videos corresponding to the playing area, and after determining the target video stream from the K paths of camera videos, decoding the target video stream by using a 4-path decoder which is opened in advance, so that the decoding speed is increased, the response time of a client request is shortened, and the user experience is improved. And when the client changes the playing area through operations such as translation, scaling and the like, the target video stream is changed, the target video stream can be decoded by the opened 4-way decoder all the time, multiplexing of the 4-way decoder is realized, the decoder does not need to be frequently switched on or off, after the target video stream is changed, the changed target video stream can be quickly switched, the decoding speed is increased, and the watching experience of the client is improved.
In an example, the preset M-way decoder may be started after the target video stream is determined, so as to avoid the waste of server performance caused by starting the M-way decoder when the client does not need to watch the high-definition video content of the specific area.
In an exemplary embodiment, in step S14, determining the high-resolution video stream of the N-way camera video as the target video stream from the K-way camera video includes:
when K is less than or equal to M, determining the high-resolution video stream of the K paths of camera videos as a target video stream, wherein N=K;
and when K > M, determining the high-resolution video stream of M paths of camera videos from the K paths of camera videos as a target video stream, wherein N=M.
If K is less than or equal to M, namely the number of the camera videos corresponding to the playing area is less than or equal to the decoding number of the preset M paths of decoders, the preset M paths of decoders can decode the high-resolution video streams of all K paths of camera videos, at the moment, the high-resolution video streams of all K paths of camera videos are used as target video streams, the high-resolution video streams of all camera videos corresponding to the playing area are decoded, and all low-resolution video streams in the playing area are replaced, so that high-definition playing of video contents in the playing area is realized.
If K > M, namely the number of the camera video corresponding to the playing area exceeds the decoding number of the preset M-path decoder, the decoding capability of the preset M-path decoder is exceeded. M paths of high-resolution video streams are selected from the high-resolution video streams of the K paths of camera videos and serve as target video streams, the selected target video streams are decoded, the corresponding low-resolution video streams in the playing area are replaced, and high-definition playing of video contents in the playing area is achieved.
In an exemplary embodiment, when n=m, all decoders of the M-way decoders decode the N-way target video;
when N < M, the N-way decoder in the M-way decoders decodes the N-way target video, and the rest decoders enter an idle state.
In the live broadcast process, if the number of paths of the target video stream is equal to the number of decoding paths of a preset decoder, decoding is carried out by using all preset M paths of decoders; if the number of paths of the target video stream is smaller than the number of decoding paths of the preset decoder, decoding N paths of target video by N paths of decoders in the M paths of decoders, and enabling the rest decoders to enter an idle state. The preset M paths of decoders are guaranteed to be always in an on state, when a client changes a playing area through operations such as translation and scaling to change a target video stream, the preset M paths of decoders can decode the changed target video stream at any time, and decoding speed is improved.
In an exemplary embodiment, when K > M, determining the high resolution video stream of the M-way camera video as the target video stream from the K-way camera video comprises:
and determining the center point of the playing area according to the coordinates of the playing area, and determining the high-resolution video stream of M paths of camera videos with the closest distance from the center point of the video picture to the center point of the playing area as a target video stream.
Referring to fig. 2, assuming that a current play area is an area a, a center point of the area a may be determined according to coordinates of the play area. The camera video corresponding to the playing area a is video 1, video 2, video 3, video 5, video 6, video 7, video 9, video 10, video 11, and as can be seen from the figure, the center point of the picture of video 6, video 7, video 10, video 11 is closest to the center point of the playing area, so when M is 4, the high resolution video stream corresponding to video 6, video 7, video 10, video 11 is taken as the target video stream. Therefore, in the generated second video stream, the picture contents corresponding to the video 6, the video 7, the video 10 and the video 11 in the playing area are the picture contents of the high-resolution video stream, and are displayed as high-definition images, while the picture contents corresponding to the rest of videos are still the picture contents of the low-resolution video stream.
Through the embodiment, the low-resolution videos of the multiple paths of camera videos are fused into the first video stream in advance, the preset M paths of decoders are started, when the resolution of the first video stream corresponding to the playing area requested by the client is smaller than the playing resolution, the high-resolution video stream of the N paths of camera videos is determined to be the target video stream from the K paths of camera videos corresponding to the playing area, N is smaller than or equal to M, accordingly, the aim video stream is guaranteed to be continuously decoded by the opened preset M paths of decoders in the live broadcast process, the image content of the low-resolution video stream is replaced in the high-resolution video corresponding to the target video stream, the problem of the decoding capability bottleneck of the video fusion server is solved, and video pictures of live broadcast cameras with larger pixels and even high-definition video pictures with ten-level pixels are realized under the same decoding capability condition.
Fig. 3 is a block diagram of a live device of billion pixel video, shown according to an example embodiment. Referring to fig. 3, a live device of billion pixel video includes: the system comprises a camera video acquisition module 301, a first video stream fusion module 302, a play request receiving module 303, a target video stream determining module 304, a replacing module 305 and a sending module 306.
The camera video acquisition module 301 is configured to acquire multiple paths of camera videos captured by an array camera, wherein each path of camera video includes a high resolution video stream and a low resolution video stream.
The first video stream fusion module 302 is configured to decode all low resolution video streams in the multi-path camera video and fuse and splice into a first video stream.
The play request receiving module 303 is configured to receive a play request of a client, the play request including a play area and a play resolution.
The target video stream determining module 304 is configured to determine K paths of camera videos corresponding to the playing area when the resolution of the first video stream corresponding to the playing area is smaller than the playing resolution, and determine the high-resolution video stream of the N paths of camera videos as the target video stream from the K paths of camera videos.
The replacing module 305 is configured to decode the target video stream, and replace the picture content of the first video stream corresponding to the playing area with the picture content of the target video stream;
the sending module 306 is configured to perform fusion rendering on the replaced picture, generate a second video stream, and send the second video stream to the client.
The sending module 306 is further configured to cut out the picture content corresponding to the playing area from the picture content of the first video stream when the resolution of the first video stream corresponding to the playing area is greater than or equal to the playing resolution, and generate a third video stream to send to the client.
Fig. 4 is a block diagram of a live device of billion pixel video, shown according to an example embodiment. Referring to fig. 4, the live device of billion pixel video further includes: the decoder starts the module 401.
The decoder activation module 401 is configured to activate, after receiving a play request from a client, a preset M-way decoder, where M is equal to or greater than 2, for decoding a target video stream.
The target video stream determination module 304 is further configured to determine a high resolution video stream of the K-way camera video as a target video stream, n=k, when k+.m;
when K > M, determining the high-resolution video stream of M paths of camera videos from the K paths of camera videos as a target video stream, where n=m.
When K > M, determining the high resolution video stream of the M paths of camera videos as the target video stream from the K paths of camera videos comprises:
and determining the center point of the playing area according to the coordinates of the playing area, and determining the high-resolution video stream of M paths of camera videos with the closest video picture center point to the center point of the playing area as a target video stream.
Fig. 5 is a block diagram illustrating a computer device 500 for live video of billions of pixels, according to an example embodiment. For example, the computer device 500 may be provided as a server. Referring to fig. 5, the computer apparatus 500 includes a processor 501, and the number of processors may be set to one or more as needed. The computer device 500 further comprises a memory 502 for storing instructions, such as application programs, executable by the processor 501. The number of the memories can be set to one or more according to the requirement. Which may store one or more applications. The processor 501 is configured to execute instructions to perform the live method of billion pixel video described above.
It will be apparent to one of ordinary skill in the art that embodiments herein may be provided as a method, apparatus (device), or computer program product. Accordingly, the present disclosure may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present disclosure may take the form of a computer program product embodied on one or more computer-usable storage media having computer-usable program code embodied therein. Computer storage media includes volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data, including, but not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital Versatile Disk (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can be accessed by a computer. Furthermore, as is well known to those of ordinary skill in the art, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media.
The description herein is with reference to flowchart illustrations and/or block diagrams of methods, apparatus (devices) and computer program products according to embodiments herein. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
In this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that an 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 article or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of additional identical elements in an article or apparatus that comprises the element.
While preferred embodiments herein have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. It is therefore intended that the following claims be interpreted as including the preferred embodiments and all alterations and modifications as fall within the scope herein.
It will be apparent to those skilled in the art that various modifications and variations can be made herein without departing from the spirit and scope of the disclosure. Thus, given that such modifications and variations herein fall within the scope of the claims herein and their equivalents, such modifications and variations are intended to be included herein.

Claims (6)

1. A live method of billion pixel video, for use with a server, comprising:
acquiring multiple paths of camera videos shot by an array camera, wherein each path of camera video comprises a high-resolution video stream and a low-resolution video stream;
decoding all low-resolution video streams in the multi-path camera video, and fusing and splicing the low-resolution video streams into a first video stream;
receiving a play request of a client, wherein the play request comprises a play area and a play resolution;
when the resolution of the first video stream corresponding to the playing area is smaller than the playing resolution, determining K paths of camera videos corresponding to the playing area, and determining the high-resolution video stream of N paths of camera videos from the K paths of camera videos as a target video stream;
decoding the target video stream, and replacing the picture content of the first video stream corresponding to the playing area with the picture content of the target video stream;
rendering the replaced picture, generating a second video stream, and sending the second video stream to the client, wherein N is more than or equal to 1 and less than or equal to K;
after receiving a play request of a client, starting a preset M-path decoder, wherein M is more than or equal to 2, and the M-path decoder is used for decoding the target video stream;
the determining that the high-resolution video stream of the N paths of camera videos is the target video stream from the K paths of camera videos comprises:
when K is less than or equal to M, determining the high-resolution video stream of the K paths of camera videos as a target video stream, wherein N=K;
when K > M, determining the high-resolution video stream of M paths of camera videos from the K paths of camera videos as a target video stream, wherein N=M;
when K > M, determining that the high-resolution video stream of the M-path camera video is the target video stream from the K-path camera video includes:
and determining the center point of the playing area according to the coordinates of the playing area, and determining the high-resolution video stream of M paths of camera videos with the closest video picture center point to the center point of the playing area as a target video stream.
2. A method of live video of billions of pixels as in claim 1 further comprising:
when the resolution of the first video stream corresponding to the playing area is larger than or equal to the playing resolution, cutting out the picture content corresponding to the playing area from the picture content of the first video stream, generating a third video stream and sending the third video stream to the client.
3. A method of live video of billions of pixels as claimed in claim 1,
when n=m, all decoders in the M-way decoders decode N-way target video;
and when N < M, decoding N paths of target videos by N paths of decoders in the M paths of decoders, and enabling the rest decoders to enter an idle state.
4. A live video device of billion pixels, comprising:
the camera video acquisition module is used for acquiring multiple paths of camera videos shot by the array camera, wherein each path of camera video comprises a high-resolution video stream and a low-resolution video stream;
the first video stream fusion module is used for decoding all low-resolution video streams in the multi-path camera video, and fusing and splicing the low-resolution video streams into a first video stream;
the system comprises a play request receiving module, a play request processing module and a play request processing module, wherein the play request receiving module is used for receiving a play request of a client, and the play request comprises a play area and a play resolution;
the target video stream determining module is used for determining K paths of camera videos corresponding to the playing area when the resolution of the first video stream corresponding to the playing area is smaller than the playing resolution, and determining high-resolution video streams of N paths of camera videos from the K paths of camera videos as target video streams;
a replacing module, configured to decode the target video stream, and replace the picture content of the first video stream corresponding to the playing area with the picture content of the target video stream;
the sending module is used for carrying out fusion rendering on the replaced pictures, generating a second video stream and sending the second video stream to the client;
the decoder starting module is used for starting a preset M paths of decoders after the playing request of the client is received, wherein M is more than or equal to 2;
the determining that the high-resolution video stream of the N paths of camera videos is the target video stream from the K paths of camera videos comprises:
when K is less than or equal to M, determining the high-resolution video stream of the K paths of camera videos as a target video stream, wherein N=K;
when K > M, determining the high-resolution video stream of M paths of camera videos from the K paths of camera videos as a target video stream, wherein N=M;
when K > M, determining that the high-resolution video stream of the M-path camera video is the target video stream from the K-path camera video includes:
and determining the center point of the playing area according to the coordinates of the playing area, and determining the high-resolution video stream of M paths of camera videos with the closest video picture center point to the center point of the playing area as a target video stream.
5. A computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when executed, implements the steps of the method according to any of claims 1-3.
6. A computer device comprising a processor, a memory and a computer program stored on the memory, characterized in that the processor implements the steps of the method according to any of claims 1-3 when the computer program is executed.
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