CN111432251B - Video processing method, video processing device, electronic equipment and medium - Google Patents
Video processing method, video processing device, electronic equipment and medium Download PDFInfo
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- CN111432251B CN111432251B CN202010337722.1A CN202010337722A CN111432251B CN 111432251 B CN111432251 B CN 111432251B CN 202010337722 A CN202010337722 A CN 202010337722A CN 111432251 B CN111432251 B CN 111432251B
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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
- H04N21/25—Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
- H04N21/266—Channel or content management, e.g. generation and management of keys and entitlement messages in a conditional access system, merging a VOD unicast channel into a multicast channel
- H04N21/2662—Controlling the complexity of the video stream, e.g. by scaling the resolution or bitrate of the video stream based on the client capabilities
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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
- H04N21/25—Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
- H04N21/262—Content or additional data distribution scheduling, e.g. sending additional data at off-peak times, updating software modules, calculating the carousel transmission frequency, delaying a video stream transmission, generating play-lists
- H04N21/26208—Content or additional data distribution scheduling, e.g. sending additional data at off-peak times, updating software modules, calculating the carousel transmission frequency, delaying a video stream transmission, generating play-lists the scheduling operation being performed under constraints
- H04N21/26216—Content or additional data distribution scheduling, e.g. sending additional data at off-peak times, updating software modules, calculating the carousel transmission frequency, delaying a video stream transmission, generating play-lists the scheduling operation being performed under constraints involving the channel capacity, e.g. network bandwidth
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs
- H04N21/4402—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display
Abstract
The embodiment of the invention discloses a video processing method, a video processing device, electronic equipment and a medium. The method comprises the following steps: if a code stream switching trigger event is identified, determining a target video service from at least two video services; determining code stream switching control information of the target video service; sending the code stream switching control information to a management device so that the management device switches and sends the code stream of the target video service according to the code stream switching control information; and receiving the switched code stream of the target video service sent by the management equipment. By adopting the scheme, the video code stream from the stream sending end can be controlled, the problem that the network transmission bandwidth is insufficient due to the fact that the code rate of the received video code stream is too large and occupies too much transmission bandwidth is avoided, the problem that the video is blocked due to the fact that the transmission bandwidth is insufficient when the video code stream with large service volume is put on the wall is solved, and decoding resources and network transmission resources are utilized to the maximum extent.
Description
Technical Field
The embodiment of the invention relates to the technical field of data transmission, in particular to a video processing method, a video processing device, electronic equipment and a medium.
Background
With the popularization of television walls and the higher and higher supported resolution, more and more fields choose to adopt television walls to display video information. For example, a video wall is used in the field of surveillance to display surveillance video in real time.
At present, with increasingly stronger display requirements and display capabilities, the transmission capacity of a single portal has been upgraded from hundreds of megabits to gigabytes. For a decoding device, one network port usually needs to correspond to multiple output ports, and when a large video service needs to be processed, the actual transmission capability and the requirement of the bandwidth still have a large difference, which easily causes that a picture is jammed when the video data is displayed on the wall.
Disclosure of Invention
The embodiment of the invention provides a video processing method, a video processing device, electronic equipment and a video processing medium, which are used for controlling the code rate of a video code stream from an image data stream sending end to decoding equipment.
In a first aspect, an embodiment of the present invention provides a video processing method, where the method includes:
if a code stream switching trigger event is identified, determining a target video service from at least two video services; determining code stream switching control information of the target video service;
sending the code stream switching control information to a management device so that the management device switches and sends the code stream of the target video service according to the code stream switching control information to adjust the code rate of the code stream;
and receiving the switched code stream of the target video service sent by the management equipment.
In a second aspect, an embodiment of the present invention further provides a video processing apparatus, where the apparatus includes:
the switching information determining module is used for determining a target video service from at least two video services if a code stream switching trigger event is identified; determining code stream switching control information of the target video service;
a switching information sending module, configured to send the code stream switching control information to a management device, so that the management device switches and sends the code stream of the target video service according to the code stream switching control information, so as to adjust a code stream code rate;
and the video code stream receiving module is used for receiving the switched code stream of the target video service sent by the management equipment.
In a third aspect, an embodiment of the present invention further provides an electronic device, including:
one or more processors;
storage means for storing one or more programs;
the one or more programs are executed by the one or more processors such that the one or more processors implement a video processing method as provided in any embodiment of the invention.
In a fourth aspect, an embodiment of the present invention further provides a medium on which a computer program is stored, where the program, when executed by a processor, implements a video processing method as provided in any of the embodiments of the present invention.
The embodiment of the invention provides a video processing method, which is characterized in that under the condition that a code stream switching trigger event is determined, a target video service and code stream switching control information of the target video service are determined from a plurality of video services, and a management device switches a code stream of the target video service according to the code stream switching control information so as to adjust the code rate of a video code stream sent by the management device. By adopting the scheme, the video code stream from the stream sending end can be controlled, the problem of insufficient network transmission bandwidth caused by the fact that the code rate of the received video code stream is too large and occupies too much transmission bandwidth is avoided, the problem of video blocking caused by the fact that the transmission bandwidth is insufficient when the video code stream with large service volume is put on the wall is solved, and decoding resources and network transmission resources are utilized to the maximum extent.
The above summary of the present invention is merely an overview of the technical solutions of the present invention, and the present invention can be implemented in accordance with the content of the description in order to make the technical means of the present invention more clearly understood, and the above and other objects, features, and advantages of the present invention will be more clearly understood.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the following detailed description of non-limiting embodiments thereof, made with reference to the accompanying drawings. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
fig. 1 is a flowchart of a video processing method provided in an embodiment of the present invention;
fig. 2 is a schematic transmission diagram of a video stream of a video service provided in an embodiment of the present invention;
fig. 3 is a flow chart of another video processing method provided in an embodiment of the present invention;
FIG. 4 is a schematic view of a window between video display windows provided in an embodiment of the present invention;
FIG. 5 is a schematic view of windows between video display windows in accordance with another embodiment of the present invention;
FIG. 6 is a schematic view of windows between video display windows of yet another type provided in an embodiment of the present invention;
fig. 7 is a block diagram of a video processing apparatus provided in an embodiment of the present invention;
fig. 8 is a schematic structural diagram of an electronic device provided in an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Before discussing exemplary embodiments in more detail, it should be noted that some exemplary embodiments are described as processes or methods depicted as flowcharts. Although a flowchart may describe the operations (or steps) as a sequential process, many of the operations can be performed in parallel, concurrently or simultaneously. In addition, the order of the operations may be re-arranged. The process may be terminated when its operations are completed, but may have additional steps not included in the figure. The processes may correspond to methods, functions, procedures, subroutines, and the like.
In order to better understand the technical scheme of the application, the related content of the decoding device in the actual scene is briefly analyzed to better find the defects therein. Generally, an encoding device may encode video data of a video service to obtain a video code stream, transmit the video code stream to a decoding device through a network or in another form for decoding, and finally display a decoded video signal on a display device. When a video code stream with small traffic is processed, the decoding device can decode normally, but when a video code stream with large traffic is processed, the network transmission bandwidth may be insufficient, so that the video code stream cannot be normally transmitted to the decoding device for decoding, and the decoding is blocked, thereby affecting subsequent display.
In combination with the above analysis of decoding defects occurring in the decoding device, the following embodiments and alternative technical solutions of the embodiments are provided to describe in detail a video processing method, an apparatus, an electronic device, and a medium.
Fig. 1 is a flowchart of a video processing method provided in an embodiment of the present invention. The embodiment of the invention can be suitable for reasonably controlling the video code stream from the stream sending end. The method can be executed by a video processing device, which can be implemented in software and/or hardware and integrated on any electronic equipment with network communication function. For example, the electronic device may include, but is not limited to, a decoding device, a computer device, a server, and the like. As shown in fig. 1, the video processing method provided in the embodiment of the present invention may include the following steps S110 to S130:
s110, if a code stream switching trigger event is identified, determining a target video service from at least two video services; and determining code stream switching control information of the target video service.
In this embodiment, fig. 2 is a schematic transmission diagram of a video stream of a video service provided in this embodiment of the present invention. Referring to fig. 2, the decoding device may receive the video stream from the encoding device sent by the management device, and display the video stream on the display device after decoding the video stream. The display device may include a television wall, for example, the television wall is an oversized television wall formed by splicing a plurality of large screens. The code stream switching trigger event can be used for indicating whether the management equipment carries out code stream switching on the video code stream sent to the decoding equipment. For example, for the case of insufficient network transmission bandwidth, the management device is instructed to perform code rate reduction on the video code stream sent to the decoding device through the code stream switching triggering event; and for the condition that the network transmission bandwidth is sufficient, indicating the management equipment to carry out code rate improvement or restore the initial code rate on the video code stream sent to the decoding equipment through the code stream switching triggering event.
In this embodiment, fig. 2 only shows a transmission schematic that a video stream of one video service is decoded and displayed on a display device, whereas for a decoding device in an actual scene, the decoding device usually processes video streams of multiple video services, not video streams of one video service. That is, the decoding device will usually decode the code streams of multiple video services, and display the decoded video signals of multiple video services on the display device. Therefore, after the code stream switching trigger event is identified, the decoding device does not control the management device to perform code stream switching on the video code streams of all the video services, and selects a target video service meeting the code stream switching requirement from at least two video services, so that the management device can switch the code stream of the target video service. The method has the advantages that purposeful code stream switching can be carried out according to actual requirements, and the phenomenon that video data of part of video services displayed on the display equipment does not meet requirements and the display effect is influenced after the code streams of the part of video services are switched is avoided.
In this embodiment, the decoding device needs to determine, in addition to the code stream of which video service of the at least two video services is to be switched, code stream switching control information of the target video service, that is, how to switch the code stream of the target video service. Optionally, the code stream switching control information is used to instruct to switch the code stream of the current code rate of the target video service to the code stream of the target code rate. For example, for the case of insufficient network transmission bandwidth, the set target code rate is smaller than the current code rate; namely, the code rate of the video code stream of the target video service is reduced, so that excessive network transmission bandwidth is not occupied in the transmission process. And for the condition that the network transmission bandwidth is sufficient, the set target code rate is greater than the current code rate, that is, the code rate of the video code stream of the target video service is increased, so that the code stream of the video service can bear enough data in the transmission process to ensure the definition and the fluency of the video.
And S120, sending code stream switching control information to the management equipment so that the management equipment switches and sends the code stream of the target video service according to the code stream switching control information.
In this embodiment, referring to fig. 2, the encoding device does not directly send the encoded video code stream of each video service to the decoding device, but first sends the encoded video code stream to the management device, and then the management device forwards the received code stream of each video service to the decoding device. On the basis, the decoding device can send the determined code stream switching control information of the target video service to the management device, and then the management device can realize the switching operation of the video code stream according to the code stream switching control information, so that the aim of adjusting the code rate of the transmitted code stream is fulfilled.
In this embodiment, the management device may switch the code stream required to be continuously transmitted by the target video service from the code stream with the current code rate to the code stream with the target code rate according to the code stream type information of the switched code stream indicated by the code stream switching control information, for example, the code stream type information may be the code rate of the switched code stream, and then continuously transmit the switched code stream to the decoding device, so that the code rate of the video code stream of the target video service transmitted to the decoding device may be controlled. Wherein, for the condition of insufficient network transmission bandwidth, the target code rate is less than the current code rate; and for the condition that the network transmission bandwidth is sufficient, the target code rate is greater than the current code rate.
It should be noted that, the solution of the present application does not limit the bandwidth inside the decoding device to allocate different transmission bandwidths. According to the scheme, the method for limiting the bandwidth in the decoding device only limits the bandwidth of the decoding device, the transmission bandwidth of a stream sending end (such as an encoding device) cannot be controlled, and data can be sent and cannot be effectively controlled. Therefore, the scheme of the application controls the video code stream of each video service from the source of the video data, and avoids the blockage in the decoding process caused by insufficient transmission bandwidth under the video service with large service volume.
In the present embodiment, when the stream switching control information is transmitted to the management device, since there are many video services that may be involved, the required stream switching control information is expressed as briefly as possible at the time of delivery. Optionally, the following format is adopted on the transmission format: <? 1.0 encoding? < ScreenGroupCode > String </ScreenGroupCode > and < WindowsGroup > WindowID: StreamType, WindowID: StreamType … … </WindowsGroup >. Wherein, the management platform needs to be informed in the protocol: the ScreenGroupCode indicates which group of screens is controlled, the WindowsGroup indicates which window lists are to be controlled, and the StreamType indicates what code stream type needs to be switched to. By adopting the transmission format, the related control information of the management equipment can be simply and concisely informed in a simple expression mode, and the method is convenient and concise.
And S130, receiving the switched code stream of the target video service sent by the management equipment.
In this embodiment, referring to fig. 2, the decoding device may receive the switched video code stream of the target video service. Therefore, the transmission bandwidth occupied by the code stream received by the decoding equipment can be effectively controlled, and the problem of decoding blockage caused by insufficient network transmission bandwidth due to overlarge transmission bandwidth required by the video code stream sent to the decoding equipment is avoided, so that the transmission bandwidth occupied by the video service is ensured to be in a reasonable range, and the decoding resources and the network transmission resources of the decoding equipment can be utilized to the maximum extent.
In an optional manner of this embodiment, receiving the post-switching code stream of the target video service sent by the management device may include the following steps:
receiving a switched code stream of a target video service sent by management equipment by adopting a target transmission channel; the target transmission channel comprises a reusable transmission channel between the management device and the decoding device before code stream switching.
In this embodiment, when the management device receives the code stream switching control information notified by the decoding device, the management platform switches the code stream of the target video service to be sent to the decoding device according to the code stream switching control information, switches from the code stream before the current code rate is switched to the code stream after the target code rate is switched, and then sends the code stream after the target code rate is switched. In addition, in order to ensure that video pictures are not blocked due to transmission interruption of transmitted video data in the code stream switching process, the management device does not disconnect the transmission channel established between the management device and the decoding device in the code stream switching process, but directly multiplexes a target transmission channel between the management device and the decoding device before code stream switching to transmit the switched code stream. Therefore, when the code stream is switched, the original target transmission channel can be directly adopted to continuously transmit the switched code stream without waiting for the reestablishment of the transmission channel, so that the interruption of video transmission caused by reestablishment of the transmission channel is avoided.
In this embodiment, optionally, referring to fig. 2, for the same video service, a plurality of channel connections with different code rates may be respectively established between the management device and the encoding device. For example, channel connections of different code rates between the management device and the encoding device may be established based on socket communication. In this way, the management device can adopt a plurality of channel connections with different code rates between the management device and the coding device, and simultaneously acquire the code stream before switching, the code stream after switching and the code streams with other code rates of the target video service from the coding device. For example, when accessing the coding device, the management device may establish a plurality of channel connections with different code rates for the coding channel of each video service, including a communication connection of a main code stream, a communication connection of an auxiliary code stream, and a communication connection of a third code stream, where the code rate of the main code stream is greater than the code rate of the auxiliary code stream, and the code rate of the auxiliary code stream is greater than the code rate of the third code stream. On the basis, the management equipment can simultaneously acquire video code stream data of all code rates of the coding equipment, when the code stream needs to be switched, only another code stream to be switched and meeting the switching requirement needs to be written into the target transmission channel, then the target transmission channel is multiplexed to continuously send the switched code stream of the target video service to the decoding equipment, and the video code stream data does not need to be acquired from the coding equipment again.
The alternative scheme has the advantages that the management equipment can directly multiplex the original transmission channel to transmit the switched video code stream, directly replace the code stream data of the current code rate with the switched code stream data and write the code stream data into the existing target transmission channel, and can avoid the phenomenon that the transmitted code stream is interrupted due to reestablishment of the transmission channel to cause the blockage of the subsequent pictures displayed on the display equipment. Meanwhile, the management platform acquires code streams of all code rate types of the coding equipment, so that video code stream data does not need to be acquired from the coding equipment when the code streams are switched, and seamless code stream switching is realized.
The embodiment of the invention provides a video processing method, and by adopting the scheme, the video code stream from a stream sending end can be controlled, the problem of insufficient network transmission bandwidth caused by overlarge code rate of the received video code stream occupying too much transmission bandwidth is avoided, the problem of video blockage caused by insufficient transmission bandwidth when a large-traffic video code stream is put on the wall is solved, and the decoding resources and the network transmission resources of decoding equipment are utilized to the maximum extent.
On the basis of the above embodiment, optionally, before determining the target video service from the at least two video services, the following steps a1-a2 may be further included:
step A1, determining the remaining transmission bandwidth of the network according to the transmission bandwidth required by each of at least two video services.
In this embodiment, referring to fig. 2, for each video service on the decoding device, the decoding device may obtain the resolution and the frame rate of the video code stream of each video service; and then, calculating the transmission bandwidth required to be occupied by each video service according to the resolution and the frame rate of each video code stream and a preset transmission bandwidth calculation mode. For example, the transmission bandwidth of a video stream of a video service is calculated as follows: if the resolution of the video code stream of the video service is 1080P and the frame rate is 30fps, the transmission bandwidth required by the video service is 4 Mbps; if the resolution of the video code stream of the video service is 1080P and the frame rate is 60fps, the transmission bandwidth required by the video service is 8 Mbps; if the resolution of the video stream of the video service is 720P and the frame rate is 30fps, the transmission bandwidth required by the video service is 2 Mbps.
In this embodiment, after determining the transmission bandwidth required by each of the at least two video services, the total transmission bandwidth required to be occupied by the at least two video services may be counted. And calculating to obtain the residual transmission bandwidth in the network transmission bandwidth between the management equipment and the decoding equipment according to the total transmission bandwidth occupied by the at least two video services. Alternatively, considering that theoretical data transmission can reach 1Gbps for a gigabit network port, the actual transmission optimal condition may only reach 500Mbps, and thus when calculating the remaining transmission bandwidth in the network transmission bandwidth between the management device and the decoding device, the remaining transmission bandwidth in the network transmission bandwidth may be counted according to 500Mbps which can be reached by the actual transmission optimal condition.
Step A2, if the residual transmission bandwidth is less than the preset bandwidth lower limit threshold, determining that the network transmission bandwidth between the management device and the decoding device is insufficient, and triggering code stream switching operation.
In this embodiment, a bandwidth threshold may be preset as a lower limit threshold, and if it is detected that the remaining transmission bandwidth is smaller than the preset bandwidth lower limit threshold, it is determined that the occupied transmission bandwidth of each video service is too large, which results in insufficient network transmission bandwidth between the management device and the decoding device, and at this time, it may be considered that the first-type code stream switching trigger event is identified, and an operation of reducing the code rate of the video code stream of the video service needs to be performed.
In this embodiment, optionally, another bandwidth threshold may be preset as an upper threshold, and if it is detected that the remaining transmission bandwidth is greater than the preset upper threshold, it is determined that the occupied transmission bandwidth of each video service is relatively small, and the network transmission bandwidth between the management device and the decoding device is sufficient, at this time, it may be considered that the second-type code stream switching trigger event is identified, and an operation of increasing or recovering the code rate of the video code stream of the video service may be performed. In addition, optionally, if it is detected that the remaining transmission bandwidth is greater than the preset bandwidth lower limit threshold and less than the preset bandwidth upper limit threshold, it is determined that the transmission bandwidth occupied by each video service is just suitable, and at this time, it indicates that the code stream switching trigger event is not identified.
The method has the advantages that the transmission bandwidth occupied by each received video service can be detected in real time, if the transmission bandwidth occupied by each video service is detected to be overlarge, the transmission bandwidth occupied by the video service is controlled in time, and the problem that the decoding equipment is blocked due to the overlarge transmission bandwidth occupied by the video service is solved from the source; meanwhile, the time for recovering the code rate of the code stream of the video service can be timely known through real-time detection, so that the display effect of the video signal on the display equipment is ensured.
Fig. 3 is a flowchart of another video processing method provided in an embodiment of the present invention, and the embodiment of the present invention further optimizes the step of S110 in the foregoing embodiment on the basis of the foregoing embodiment, and the embodiment of the present invention may be combined with various alternatives in one or more embodiments. As shown in fig. 3, the video processing method provided in this embodiment may include the following steps S310 to S340:
s310, if the code stream switching trigger event is identified, determining a target video display window from at least two video display windows according to the window attribute information of the at least two video display windows on the display equipment.
In this embodiment, referring to fig. 2, the video data of each video service is displayed on the display device in the form of a video display window. Wherein, on the display device, one video display window correspondingly displays the video data of one video service. At this time, the window attribute information of the video display window associated with each video service on the display device can be determined, and the target video service can be determined according to the window attribute information of the video display window associated with each video service. Optionally, the window attribute information may include: one or more of occluded information of the video display window, size information of the video display window, and position information of the video display window. Therefore, when the network transmission bandwidth pressure is detected to be large, the decoding device can select a target video display window from a plurality of video display windows according to multiple dimensions, and further select a proper target video service to switch the code stream.
S320, taking the video service associated with the target video display window as a target video service; and determining code stream switching control information of the target video service.
In the present embodiment, for each video display window displayed on the display device, one or more video services are associated with each video display window. The decoding device decodes the code stream of the video service related to the decoding device and sends the decoded video data to the display device. The display device can display the decoded video data of the video service associated with the display device through the video display window.
In an optional manner of this embodiment, determining the target video display window from the at least two video display windows according to the window attribute information of the at least two video display windows on the display device may include the following steps B1-B2:
and step B1, if the occluded video display window exists in the at least two video display windows, determining the size of the occluded area of the occluded video display window.
In this embodiment, fig. 4 is a schematic view of windows between video display windows provided in an embodiment of the present invention. Referring to fig. 4, on the display device, most of the area of the video display window 1 is covered by the video display window 2, and only a small area of the video display window 2 is covered by the video display window 3. For such cases, because most of the area of the video display window 1 is blocked, the video information of the window itself is not paid attention by the user, so that the bitrate of the code stream of the video service corresponding to the part of the video display window can be optionally reduced. Based on the analysis, the target video display window needing code stream switching can be determined according to the shielding coverage condition among the video display windows on the display equipment.
In this embodiment, whether an occluded video display window exists in at least two video display windows displayed on the display device can be detected in real time. If yes, continuing to determine the size of the shielded area of the shielded video display window so as to determine whether the shielded video display window is taken as the target video display window by using the size of the shielded area; and if the attribute information does not exist, determining the target video display window by adopting the next attribute information according to the priority order of each attribute information in the window attribute information.
And step B2, determining a target video display window from the occluded video display windows according to the size of the occluded area of the occluded video display window.
In this embodiment, optionally, the occluded video display windows may be sorted from large to small according to the size of the occluded area of each occluded video display window, and a preset video display window sorted in the front is selected as the target video display window. Optionally, a window occlusion region threshold may be preset, and if it is detected that the size of the occluded region of the occluded video display window is greater than the preset window occlusion region threshold, the occluded video display window is used as the target video display window; otherwise, the window is not displayed as the target video. And if the target video display window cannot be obtained according to the size of the shielded area of the shielded video display window, screening and determining the target video display window by adopting the next attribute information according to the priority order of each attribute information in the window attribute information or screening the target video display window by adopting a previous selectable shielded area size sorting scheme.
On the basis of the above embodiment, optionally, when it is determined whether the video display window displayed on the display device can reduce the code rate level of the code stream, if the video display window is not covered by other video display windows and the video display window is displayed by splicing a plurality of large screens, the video display window is used as a special window that cannot reduce the code rate of the code stream.
In another optional manner of this embodiment, determining the target video display window from the at least two video display windows according to the window attribute information of the at least two video display windows on the display device may include:
and if the video display window with the scaled size exists in the at least two video display windows, determining a target video display window from the video display windows with the scaled size.
In this embodiment, fig. 5 is a schematic view of windows between video display windows provided in this embodiment of the present invention. Referring to fig. 5, on the display device, the window sizes of the respective video display windows may not be uniform, for example, the window size of the video display window 1 is small, and the windows of the video display window 2 and the video display window 3 are large. For such cases, the video display window with a larger size may focus more details, and the video display window with a smaller size may ignore the details relatively, so that the bitrate of the code stream of the video service corresponding to the video display window with the reduced size may be optionally reduced.
In this embodiment, it is possible to detect in real time whether there is a video display window that is scaled in size among at least two video display windows displayed on the display device. If so, determining a target video display window from the video display windows with the scaled sizes; and if the attribute information does not exist, screening and determining the target video display window by adopting the next attribute information according to the priority order of each attribute information in the window attribute information.
In this embodiment, optionally, the video display windows with different sizes may be sorted from small to large according to the window sizes of the video display windows with different sizes, and the video display window with the preset size that is sorted before is selected as the target video display window. Still alternatively, the number of pixels each size-scaled video display window occupies on the display device and the resolution of the video data corresponding to each size-scaled video display window may be separately determined. If the number of pixels occupied by the video display window with the scaled size on the display device is smaller than the resolution of the video data corresponding to the video display window with the scaled size, taking the video display window with the scaled size as a target video display window; otherwise, the window is not displayed as the target video. And if the target video display window cannot be obtained according to the window size of the video display window with the scaled size, screening and determining the target video display window by adopting the next attribute information or screening the target video display window by adopting a previous optional window size sorting scheme according to the priority order of each attribute information in the window attribute information.
In yet another alternative of this embodiment, determining the target video display window from the at least two video display windows according to the window attribute information of the at least two video display windows on the display device may include the following steps C1-C2:
and step C1, if the window number of the at least two video display windows is determined to exceed the preset number, determining the video display window concerned according to the window positions of the at least two video display windows.
In this embodiment, fig. 6 is a schematic view of windows between video display windows according to still another embodiment of the present invention. Referring to fig. 6, the number of windows of the video display windows displayed on the display device may be very large, and the attention degrees of the respective video display windows for different positions are different, that is, some positions focus heavily and some positions focus less. For example, referring to fig. 6, the positions of the video display window 1, the video display window 4, the video display window 9, the video display window 12, and the like are in the corners of the display device, and from a use perspective, the more concerned video service is placed in the middle position, so that the actual details of the video in the video display window can be conveniently concerned, and from this perspective, the bitrate of the video stream of such windows placed in the corners can be reduced.
Based on the above thought, it is possible to detect in real time whether the number of windows of the video display windows on the display device exceeds a preset number. If the number of the video display windows exceeds the preset number, determining the concerned video display window according to the window positions of at least two video display windows displayed on the display equipment; otherwise, the process is not performed or a default video display window is taken as the video display window of interest. For example, a video display window focused on by a user may be determined by a visual tracking technique, or a video display window at a preset position may be taken as a video display window focused on.
And step C2, taking the other video display windows except the video display window concerned in the at least two video display windows as the target video display window.
In the present embodiment, after the video display window focused on the display device is determined, other video display windows displayed on the display device other than the video display window focused on may be taken as the target video display window.
S330, sending the code stream switching control information to the management equipment so that the management equipment switches and sends the code stream of the target video service according to the code stream switching control information to adjust the code rate of the code stream.
And S340, receiving the switched code stream of the target video service sent by the management equipment.
On the basis of the above embodiment, when determining whether to perform the code stream switching, one or more selectable modes are selected from the three selectable modes to respectively form a complete code stream switching scheme under two conditions of insufficient network transmission bandwidth and sufficient network transmission bandwidth, and the video code stream switching operation is respectively performed by sequentially adopting the code stream switching schemes of the selectable modes according to the priority order of the selected selectable modes.
For a better understanding of the above-described combination scheme, the following exemplifies a combination example of the above-described alternatives:
when the network transmission bandwidth between the management device and the decoding device is insufficient, the following exemplary schemes are included:
in an optional example, when the network transmission bandwidth is insufficient, the decoding device instructs the management device to perform first time code stream switching on the code stream of the target video service by using a code stream switching scheme in a first optional mode so as to reduce the code rate of the code stream, and receives the switched code stream; when the code stream is switched for the first time and the network transmission bandwidth is still insufficient, the decoding equipment adopts a second optional mode of code stream switching scheme to instruct the management equipment to perform second time code stream switching on the code stream of another target video service so as to reduce the code stream code rate and receive the switched code stream; and when the code stream is switched for the second time and the network transmission bandwidth is still insufficient, the decoding equipment adopts a code stream switching scheme of a third optional mode to instruct the management equipment to carry out third time code stream switching on the code stream of the other target video service so as to reduce the code stream code rate, and receives the switched code stream.
In another optional example, when the network transmission bandwidth is insufficient, the decoding device instructs the management device to perform first time code stream switching on the code stream of the target video service by using a code stream switching scheme of one of the three optional modes to reduce the code stream code rate, and receives the switched code stream; when the code stream is switched for the first time and the network transmission bandwidth is still insufficient, the decoding device adopts a code stream switching scheme of another optional mode of the three optional modes to instruct the management device to perform second-time code stream switching on the code stream of another target video service so as to reduce the code rate of the code stream, and receives the switched code stream.
When the network transmission bandwidth between the management device and the decoding device is sufficient, the process of recovering the code rate of the code stream through code stream switching is just opposite to the sequence under the condition of insufficient network transmission bandwidth.
The embodiment of the invention provides a video processing method, and by adopting the scheme, the target video display window can be determined purposefully according to the display condition of the video display window on the display equipment, then the code stream of the video service corresponding to the target video display window is switched, so that the phenomenon that the video data of the part of the video service displayed on the display equipment does not meet the requirement and the display effect is influenced after the code stream of the video service of the part of the video display window is switched is avoided. In addition, by controlling the video code stream from the stream sending end, the problem of insufficient network transmission bandwidth caused by overlarge code rate of the received video code stream occupying too much transmission bandwidth can be avoided, the problem of video blockage caused by insufficient transmission bandwidth when the video code stream with large service volume is on the wall is solved, and the decoding resources and the network transmission resources of the decoding equipment are utilized to the maximum extent.
Fig. 7 is a block diagram of a video processing apparatus provided in the embodiment of the present invention. The embodiment of the invention can be suitable for reasonably controlling the video code stream from the stream sending end. The device can be implemented in software and/or hardware and integrated on any electronic equipment with network communication function. As shown in fig. 7, the video processing apparatus provided in the embodiment of the present invention may include the following components: a switching information determining module 710, a switching information transmitting module 720 and a video stream receiving module 730. Wherein:
a switching information determining module 710, configured to determine a target video service from the at least two video services if a code stream switching trigger event is identified; determining code stream switching control information of the target video service;
a switching information sending module 720, configured to send the code stream switching control information to a management device, so that the management device switches and sends the code stream of the target video service according to the code stream switching control information, so as to adjust a code stream code rate;
a video code stream receiving module 730, configured to receive the switched code stream of the target video service sent by the management device.
On the basis of the foregoing embodiment, optionally, the handover information determining module 710 includes:
the display window determining unit is used for determining a target video display window from at least two video display windows according to window attribute information of the at least two video display windows on the display equipment; the window attribute information includes: one or more combination information of the shielded information of the video display window, the size information of the video display window and the position information of the video display window;
and the video service determining unit is used for taking the video service associated with the target video display window as the target video service.
On the basis of the foregoing embodiment, optionally, the display window determining unit includes:
if the at least two video display windows have the shielded video display window, determining the size of the shielded area of the shielded video display window;
and determining a target video display window from the occluded video display windows according to the size of the occluded area.
On the basis of the foregoing embodiment, optionally, the display window determining unit includes:
and if the video display windows with the scaled sizes exist in the at least two video display windows, determining a target video display window from the video display windows with the scaled sizes.
On the basis of the foregoing embodiment, optionally, the display window determining unit includes:
if the window number of the at least two video display windows is determined to exceed the preset number, determining the concerned video display window according to the window positions of the at least two video display windows;
and taking other video display windows except the concerned video display window in the at least two video display windows as the target video display window.
On the basis of the foregoing embodiment, optionally, the video stream switching control information is used to instruct to switch the code stream of the current code rate of the target video service to the code stream of the target code rate, where the target code rate is smaller than the current code rate.
On the basis of the foregoing embodiment, optionally, the triggering of the code stream switching trigger event includes the following operations:
determining the residual transmission bandwidth of the network according to the transmission bandwidth required by each video service in the at least two video services;
and if the residual transmission bandwidth is smaller than a preset bandwidth lower limit threshold, determining that the transmission bandwidth of the network is insufficient, and triggering code stream switching operation.
On the basis of the foregoing embodiment, optionally, the video stream receiving module 730 includes:
receiving the switched code stream of the target video service sent by the management equipment by adopting a target transmission channel; wherein the target transmission channel comprises: before code stream switching, a reusable transmission channel between the management device and the decoding device is used.
On the basis of the above embodiment, optionally, a plurality of channel connections with different code rates are established between the management device and the encoding device, and the management device obtains the pre-switching code stream and the post-switching code stream of the target video service from the encoding device through the plurality of channel connections with different code rates.
The video processing apparatus provided in the embodiment of the present invention may execute the video processing method provided in any embodiment of the present invention, and has corresponding functions and beneficial effects for executing the video processing method, and for a detailed process, reference is made to related operations of the video processing method in the foregoing embodiments.
Fig. 8 is a schematic structural diagram of an electronic device provided in an embodiment of the present invention. As shown in fig. 8, the electronic device provided in the embodiment of the present invention includes: one or more processors 810 and storage 820; the processor 810 in the electronic device may be one or more, and fig. 8 illustrates one processor 810 as an example; storage 820 is used to store one or more programs; the one or more programs are executed by the one or more processors 810, such that the one or more processors 810 implement the video processing method according to any of the embodiments of the present invention.
The electronic device may further include: an input device 830 and an output device 840.
The processor 810, the storage device 820, the input device 830 and the output device 840 in the electronic apparatus may be connected by a bus or other means, and fig. 8 illustrates an example of connection by a bus.
The storage device 820 in the electronic device is used as a computer-readable storage medium for storing one or more programs, which may be software programs, computer-executable programs, and modules, such as program instructions/modules corresponding to the video processing method provided in the embodiment of the present invention. The processor 910 executes various functional applications and data processing of the electronic device by executing software programs, instructions and modules stored in the storage 820, so as to implement the video processing method in the above method embodiment.
The storage device 820 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created according to use of the electronic device, and the like. Further, storage 820 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device. In some examples, storage 820 may further include memory located remotely from processor 810, which may be connected to devices over a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The input device 830 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the electronic apparatus. The output device 840 may include a display device such as a display screen.
And, when the one or more programs included in the electronic device are executed by the one or more processors 810, the programs perform the following operations:
if a code stream switching trigger event is identified, determining a target video service from at least two video services; determining code stream switching control information of the target video service;
sending the code stream switching control information to a management device so that the management device switches and sends the code stream of the target video service according to the code stream switching control information to adjust the code rate of the code stream;
and receiving the switched code stream of the target video service sent by the management equipment.
Of course, it will be understood by those skilled in the art that when one or more programs included in the electronic device are executed by the one or more processors 810, the programs may also perform operations related to the video processing method provided in any embodiment of the present invention.
An embodiment of the present invention provides a medium having a computer program stored thereon, the program being executed by a processor to perform a video processing method, the method including:
if a code stream switching trigger event is identified, determining a target video service from at least two video services; determining code stream switching control information of the target video service;
sending the code stream switching control information to a management device so that the management device switches and sends the code stream of the target video service according to the code stream switching control information to adjust the code rate of the code stream;
and receiving the switched code stream of the target video service sent by the management equipment.
Optionally, the program, when executed by the processor, may be further configured to perform a video processing method provided in any of the embodiments of the present invention.
The computer-readable media of embodiments of the invention may take any combination of one or more computer-readable media. The computer readable medium may be a computer readable signal medium or a computer readable storage medium. A computer readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples (a non-exhaustive list) of the computer readable storage medium would include the following: an electrical connection having one or more wires, a portable computer diskette, a hard disk, a Random Access Memory (RAM), a Read Only Memory (ROM), an Erasable Programmable Read Only Memory (EPROM), a flash Memory, an optical fiber, a portable CD-ROM, an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. A computer readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.
A computer readable signal medium may include a propagated data signal with computer readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated data signal may take a variety of forms, including, but not limited to: an electromagnetic signal, an optical signal, or any suitable combination of the foregoing. A computer readable signal medium may also be any computer readable medium that is not a computer readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.
Program code embodied on a computer readable medium may be transmitted using any appropriate medium, including but not limited to: wireless, wire, fiber optic cable, Radio Frequency (RF), etc., or any suitable combination of the foregoing.
Computer program code for carrying out operations for aspects of the present invention may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, Smalltalk, C + + or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer through any type of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or the connection may be made to an external computer (for example, through the Internet using an Internet service provider).
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
It is to be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (11)
1. A method of video processing, the method comprising:
if a code stream switching trigger event is identified, determining a target video service from at least two video services; determining code stream switching control information of the target video service; determining a target video service from at least two video services, comprising: determining a target video display window from at least two video display windows according to window attribute information of the at least two video display windows on display equipment; wherein the window attribute information includes: one or more combination information of the shielded information of the video display window, the size information of the video display window and the position information of the video display window; taking the video service associated with the target video display window as the target video service;
sending the code stream switching control information to a management device so that the management device switches and sends the code stream of the target video service according to the code stream switching control information;
and receiving the switched code stream of the target video service sent by the management equipment.
2. The method of claim 1, wherein determining a target video display window from at least two video display windows on a display device based on window attribute information of the at least two video display windows comprises:
if the at least two video display windows have the shielded video display window, determining the size of the shielded area of the shielded video display window;
and determining a target video display window from the occluded video display windows according to the size of the occluded area.
3. The method of claim 1, wherein determining a target video display window from at least two video display windows on a display device based on window attribute information of the at least two video display windows comprises:
and if the video display windows with the scaled sizes exist in the at least two video display windows, determining a target video display window from the video display windows with the scaled sizes.
4. The method of claim 1, wherein determining a target video display window from at least two video display windows on a display device based on window attribute information of the at least two video display windows comprises:
if the window number of the at least two video display windows is determined to exceed the preset number, determining the concerned video display window according to the window positions of the at least two video display windows;
and taking other video display windows except the concerned video display window in the at least two video display windows as the target video display window.
5. The method of claim 1, wherein the code stream switching control information is used to instruct to switch a code stream of a current code rate of the target video service to a code stream of a target code rate, and the target code rate is smaller than the current code rate.
6. The method according to any one of claims 1 to 5, wherein the codestream switching trigger event includes the following operations:
determining the residual transmission bandwidth of the network according to the transmission bandwidth required by each video service in the at least two video services;
and if the residual transmission bandwidth is smaller than a preset bandwidth lower limit threshold, determining that the transmission bandwidth of the network is insufficient, and triggering code stream switching operation.
7. The method according to any one of claims 1 to 5, wherein receiving the post-switching codestream of the target video service sent by the management device comprises:
receiving the switched code stream of the target video service sent by the management equipment by adopting a target transmission channel; wherein the target transmission channel comprises: before code stream switching, a reusable transmission channel between the management device and the decoding device is used.
8. The method according to claim 7, wherein a plurality of channel connections with different code rates are provided between the management device and the encoding device, and the management device connects the pre-switching code stream and the post-switching code stream of the target video service acquired from the encoding device through the plurality of channel connections with different code rates.
9. A video processing apparatus, characterized in that the apparatus comprises:
the switching information determining module is used for determining a target video service from at least two video services if a code stream switching trigger event is identified; determining code stream switching control information of the target video service;
the switching information sending module is used for sending the code stream switching control information to the management equipment so that the management equipment switches and sends the code stream of the target video service according to the code stream switching control information;
a video code stream receiving module, configured to receive the switched code stream of the target video service sent by the management device;
wherein, the switching information determining module comprises: the display window determining unit is used for determining a target video display window from at least two video display windows according to window attribute information of the at least two video display windows on the display equipment; the window attribute information includes: one or more combination information of the shielded information of the video display window, the size information of the video display window and the position information of the video display window; and the video service determining unit is used for taking the video service associated with the target video display window as the target video service.
10. An electronic device, comprising:
one or more processors;
storage means for storing one or more programs;
when executed by the one or more processors, cause the one or more processors to implement the video processing method of any of claims 1-8.
11. A medium on which a computer program is stored, which program, when being executed by a processor, is adapted to carry out the video processing method of any one of claims 1 to 8.
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| CN111901663A (en) * | 2020-08-13 | 2020-11-06 | 北京仁光科技有限公司 | Video transmission system, method and computer readable storage medium |
| CN112583814A (en) * | 2020-12-07 | 2021-03-30 | 三星电子（中国）研发中心 | Multi-terminal equipment merging playing method |
| CN113438512A (en) * | 2021-05-28 | 2021-09-24 | 福州市拾联信息科技有限公司 | Control system and control method for fast switching image quality and low code stream of video data |
| CN114422735B (en) * | 2022-01-28 | 2023-12-01 | 杭州海康威视数字技术股份有限公司 | Video recorder, video data processing method and device and electronic equipment |
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