CN113905258B - Video playing method, network device and storage medium - Google Patents
Video playing method, network device and storage medium Download PDFInfo
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- CN113905258B CN113905258B CN202111054093.2A CN202111054093A CN113905258B CN 113905258 B CN113905258 B CN 113905258B CN 202111054093 A CN202111054093 A CN 202111054093A CN 113905258 B CN113905258 B CN 113905258B
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/234—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs
- H04N21/2347—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs involving video stream encryption
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/236—Assembling of a multiplex stream, e.g. transport stream, by combining a video stream with other content or additional data, e.g. inserting a URL [Uniform Resource Locator] into a video stream, multiplexing software data into a video stream; Remultiplexing of multiplex streams; Insertion of stuffing bits into the multiplex stream, e.g. to obtain a constant bit-rate; Assembling of a packetised elementary stream
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/238—Interfacing the downstream path of the transmission network, e.g. adapting the transmission rate of a video stream to network bandwidth; Processing of multiplex streams
- H04N21/2389—Multiplex stream processing, e.g. multiplex stream encrypting
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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
- H04N21/438—Interfacing the downstream path of the transmission network originating from a server, e.g. retrieving MPEG packets from an IP network
- H04N21/4385—Multiplex stream processing, e.g. multiplex stream decrypting
- H04N21/43853—Multiplex stream processing, e.g. multiplex stream decrypting involving multiplex stream decryption
Abstract
The invention discloses a video playing method, which comprises the following steps: receiving a plurality of interest video requests sent by a plurality of clients, wherein the interest video requests are generated according to a first preset rule based on the requirement video information sent by a user; when a plurality of interest video requests meet preset conditions, acquiring target video files with video identifications matched with the interest video requests from a preset video library, wherein the video identifications in the preset video library are generated according to a first preset rule based on description information of the video files in the preset video library; and sending the target video file to a plurality of clients so that the clients play the target video file. The invention also discloses a network device and a computer readable storage medium. By using the method provided by the invention, the target video does not need to be repeatedly acquired from the preset video library for a plurality of times, so that the shunt pressure of the preset video library is reduced, and the jump balance of the preset video library is improved.
Description
Technical Field
The present invention relates to the field of streaming media processing technologies, and in particular, to a video playing method, a network device, and a computer readable storage medium.
Background
At present, the existing internet video on demand VOD streaming media playing function is mostly realized based on TCP/IP encapsulation, and is similar to IPTV, tremble sound and other applications. With the development of internet technology, the demands of users change, especially the application such as short video is emerging, resource acquisition is also facing to transition, and content is a necessary trend of internet development.
However, this trend makes the traditional TCP/IP network architecture face a serious challenge, which hinders the further development of the internet, and at present, the TCP/IP network mainly uses IP addresses as main components, and needs to establish links between the transceiver and the client before the content is transferred.
However, with the existing video playback method, the distribution pressure of the video traffic is large.
Disclosure of Invention
The invention mainly aims to provide a video playing method, network equipment and a computer readable storage medium, and aims to solve the technical problems that the existing video playing method is adopted and the distribution pressure of video flow is high in the prior art.
In order to achieve the above object, the present invention provides a video playing method, which includes the following steps:
receiving a plurality of interest video requests sent by a plurality of clients, wherein the interest video requests are generated according to a first preset rule based on the requirement video information sent by a user;
When a plurality of interest video requests meet preset conditions, acquiring target video files with video identifications matched with the interest video requests from a preset video library, wherein the video identifications in the preset video library are generated according to the first preset rule based on description information of the video files in the preset video library;
and sending the target video file to a plurality of clients so that the clients play the target video file.
Optionally, the target video file is encrypted; before the step of sending the target video file to the plurality of clients to enable the plurality of clients to play the target video file, the method further includes:
generating demand key information according to a second preset rule based on the target video identification of the target video file;
the key information is sent to a key server, so that the key server returns a target key with a key identification matched with the key information, and the key identification in the key server is generated according to a second preset rule based on the description information of the key in the key server;
the step of sending the target video file to a plurality of clients to enable the clients to play the target video file includes:
And sending the target video file and the target key to a plurality of clients so that the clients decrypt the target video file by using the target key and play the decrypted target video file.
Optionally, before the step of sending the target video file and the target key to the plurality of clients to enable the plurality of clients to decrypt the target video file by using the target key and play the decrypted target video file, the method further includes:
when receiving registration information sent by a plurality of clients, acquiring a root key based on the registration information;
transmitting the root key to a plurality of clients so that the plurality of clients store the root key;
encrypting the target key by using the root key to obtain an encryption key;
the step of sending the target video file and the target key to a plurality of clients so that the clients decrypt the target video file by using the target key and play the decrypted target video file includes:
transmitting the target video file and the encryption key to a plurality of clients so that the clients decrypt the encryption key by using the root key to obtain the target key, decrypt the target video file by using the target key, and play the decrypted target video file
Optionally, the target video file includes a plurality of diced video files, each of the diced video files being encrypted; the method further includes, before the steps of sending the target video file and the encryption key to the plurality of clients, so that the plurality of clients decrypt the encryption key by using the root key, obtain the target key, decrypt the target video file by using the target key, and play the decrypted target video file:
obtaining access credentials of a plurality of clients based on the registration information;
the step of sending the target video file and the encryption key to a plurality of clients so that the clients decrypt the encryption key by using the root key to obtain the target key, decrypt the target video file by using the target key, and play the decrypted target video file includes:
and if the access certificate is matched with the plurality of diced video files, sending the plurality of diced video files and the encryption key to a plurality of clients so that the plurality of clients decrypt the encryption key by using the root key to obtain the target key, decrypt the plurality of diced video files by using the target key to obtain decrypted plurality of diced video files, merging the decrypted plurality of diced video files into a playing video file, and playing the playing video file.
Optionally, before the step of acquiring the target video file with the video identifier matching the interest video request from the preset video library, the method further includes:
when an original video file is obtained, performing format conversion on the original video file to obtain an intermediate video file;
cutting the intermediate video file into a plurality of preprocessed video files of a fixed size;
generating preset keys corresponding to a plurality of the preprocessed video files;
encrypting a plurality of the preprocessed video files by using the preset key to obtain a plurality of encrypted video files;
acquiring original video description information of the original video file and sequence information of a plurality of encrypted video files;
generating a plurality of preset video identifications of a plurality of encrypted video files by using the original video description information, the sequence information of the plurality of encrypted video files and the first preset rule, wherein one encrypted video file corresponds to one preset video identification;
acquiring the preset video library based on a plurality of the encrypted video files and a plurality of the preset video identifications;
acquiring preset description information of the preset secret key based on a plurality of preset video identifications;
Based on the preset description information, generating a preset key identifier of the preset key according to a second preset generation rule;
and sending the preset key and the preset key identification to the key server.
Optionally, the preset key includes a first key and a second key; the step of encrypting the plurality of preprocessed video files by using a preset key to obtain a plurality of encrypted video files comprises the following steps:
acquiring sequence information of a plurality of the preprocessed video files;
and encrypting the preprocessed video files with the sequence information being odd numbers by using the first key, and encrypting the preprocessed video files with the sequence information being even numbers by using the second key to obtain a plurality of encrypted video files.
Optionally, before the step of acquiring the target video file with the video identifier matching the interest video request from the preset video library, the method further includes:
acquiring a first network address of the preset video library and a second network address of the key server;
acquiring a network address conversion table based on the first network address, the second network address and preset description information;
The step of obtaining the target video file with the video identification matched with the interest video request from the preset video library comprises the following steps:
acquiring a target video file with a video identifier matched with the interest video request from a preset video library by using the network address conversion table;
the step of sending the required key information to a key server includes:
and transmitting the required key information to a key server by using the network address translation table.
Optionally, the plurality of clients, the preset video library and the key server are in an autonomous domain; after the step of obtaining the network address translation table based on the first network address, the second network address and the preset description information, the method further includes:
broadcasting the network address translation table to shared network devices of non-autonomous domains outside the autonomous domain, such that the shared network devices receive and store the network address translation table;
when receiving a network request sent by the shared network equipment by utilizing the network address translation table, extracting a plurality of new interest video requests from the network request, wherein the network request is sent through a tunneling protocol, and the network request is generated according to a third preset rule based on the plurality of new interest video requests of a plurality of related clients;
Updating a plurality of interest video requests with a plurality of new interest video requests, and updating a plurality of clients with a plurality of associated clients;
returning to the step of executing the target video file with the video identification matched with the interest video requests from a preset video library when the interest video requests meet the preset conditions until a new target video file is obtained;
generating a forwarding video file according to a third preset rule based on the new target video file;
and sending the forwarding video file to a plurality of related clients through the tunneling protocol, so that the plurality of related clients obtain a new playing video file corresponding to the new target video file based on the forwarding video file, and play the new playing video file.
In addition, to achieve the above object, the present invention also proposes a network device, including: the video playing system comprises a memory, a processor and a video playing program stored in the memory and running on the processor, wherein the video playing program realizes the steps of the video playing method according to any one of the above steps when being executed by the processor.
In addition, to achieve the above object, the present invention also proposes a computer-readable storage medium having stored thereon a video playback program that, when executed by a processor, implements the steps of the video playback method as set forth in any one of the above.
The technical scheme of the invention provides a video playing method, which is characterized in that a plurality of interest video requests sent by a plurality of clients are received, and the interest video requests are generated according to a first preset rule based on video information required to be sent by a user; when a plurality of interest video requests meet preset conditions, acquiring target video files with video identifications matched with the interest video requests from a preset video library, wherein the video identifications in the preset video library are generated according to the first preset rule based on description information of the video files in the preset video library; and sending the target video file to a plurality of clients so that the clients play the target video file.
In the existing method, when the plurality of interest video requests meet the preset condition, it is indicated that the target videos corresponding to the plurality of interest video requests are identical, the target video file needs to be repeatedly acquired from the preset video library for a plurality of times, and the target video files acquired for a plurality of times are respectively sent to a plurality of clients for playing, so that the distribution pressure of the preset video library is higher. When the plurality of interest video requests meet the preset conditions, the method only needs to acquire the target video file once from the preset video library, and respectively send the target video file to a plurality of clients for playing, and the target video does not need to be repeatedly acquired from the preset video library for a plurality of times, so that the shunt pressure of the preset video library is reduced, and the stream jumping balance of the preset video library is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a network device in a hardware operating environment according to an embodiment of the present invention;
FIG. 2 is a flowchart of a video playing method according to a first embodiment of the present invention;
fig. 3 is a block diagram of a first embodiment of a video playing device according to the present invention.
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, fig. 1 is a schematic diagram of a network device structure of a hardware running environment according to an embodiment of the present invention.
The network device may be a Mobile phone, a smart phone, a notebook computer, a digital broadcast receiver, a Personal Digital Assistant (PDA), a tablet computer (PAD), or other User Equipment (UE), a handheld device, an in-vehicle device, a wearable device, a computing device, or other processing device connected to a wireless modem, a Mobile Station (MS), or the like. The network device may be referred to as a user terminal, portable terminal, desktop terminal, etc.
Generally, a network device includes: at least one processor 301, a memory 302 and a video playback program stored on said memory and executable on said processor, said video playback program being configured to implement the steps of the video playback method as described above.
Processor 301 may include one or more processing cores, such as a 4-core processor, an 8-core processor, and the like. The processor 301 may be implemented in at least one hardware form of DSP (Digital Signal Processing ), FPGA (Field-Programmable Gate Array, field programmable gate array), PLA (Programmable Logic Array ). The processor 301 may also include a main processor, which is a processor for processing data in an awake state, also called a CPU (Central ProcessingUnit ), and a coprocessor; a coprocessor is a low-power processor for processing data in a standby state. In some embodiments, the processor 301 may integrate a GPU (Graphics Processing Unit, image processor) for rendering and drawing of content required to be displayed by the display screen. The processor 301 may also include an AI (Artificial Intelligence ) processor for processing related video playback method operations so that the video playback method model may be trained and learned autonomously, improving efficiency and accuracy.
Memory 302 may include one or more computer-readable storage media, which may be non-transitory. Memory 302 may also include high-speed random access memory, as well as non-volatile memory, such as one or more magnetic disk storage devices, flash memory storage devices. In some embodiments, a non-transitory computer readable storage medium in memory 302 is used to store at least one instruction for execution by processor 301 to implement the video playback method provided by the method embodiments of the present application.
In some embodiments, the terminal may further optionally include: a communication interface 303, and at least one peripheral device. The processor 301, the memory 302 and the communication interface 303 may be connected by a bus or signal lines. The respective peripheral devices may be connected to the communication interface 303 through a bus, signal line, or circuit board. Specifically, the peripheral device includes: at least one of radio frequency circuitry 304, a display screen 305, and a power supply 306.
The communication interface 303 may be used to connect at least one peripheral device associated with an I/O (Input/Output) to the processor 301 and the memory 302. In some embodiments, processor 301, memory 302, and communication interface 303 are integrated on the same chip or circuit board; in some other embodiments, either or both of the processor 301, the memory 302, and the communication interface 303 may be implemented on separate chips or circuit boards, which is not limited in this embodiment.
The Radio Frequency circuit 304 is configured to receive and transmit RF (Radio Frequency) signals, also known as electromagnetic signals. The radio frequency circuitry 304 communicates with a communication network and other communication devices via electromagnetic signals. The radio frequency circuit 304 converts an electrical signal into an electromagnetic signal for transmission, or converts a received electromagnetic signal into an electrical signal. Optionally, the radio frequency circuit 304 includes: antenna systems, RF transceivers, one or more amplifiers, tuners, oscillators, digital signal processors, codec chipsets, subscriber identity module cards, and so forth. The radio frequency circuitry 304 may communicate with other terminals via at least one wireless communication protocol. The wireless communication protocol includes, but is not limited to: metropolitan area networks, various generations of mobile communication networks (2G, 3G, 4G, and 5G), wireless local area networks, and/or WiFi (Wireless Fidelity ) networks. In some embodiments, the radio frequency circuitry 304 may also include NFC (Near Field Communication ) related circuitry, which is not limiting of the application.
The display screen 305 is used to display a UI (User Interface). The UI may include graphics, text, icons, video, and any combination thereof. When the display 305 is a touch screen, the display 305 also has the ability to collect touch signals at or above the surface of the display 305. The touch signal may be input as a control signal to the processor 301 for processing. At this point, the display 305 may also be used to provide virtual buttons and/or virtual keyboards, also referred to as soft buttons and/or soft keyboards. In some embodiments, the display 305 may be one, the front panel of an electronic device; in other embodiments, the display screen 305 may be at least two, respectively disposed on different surfaces of the electronic device or in a folded design; in still other embodiments, the display 305 may be a flexible display disposed on a curved surface or a folded surface of the electronic device. Even more, the display screen 305 may be arranged in an irregular pattern other than rectangular, i.e., a shaped screen. The display 305 may be made of LCD (LiquidCrystal Display ), OLED (Organic Light-Emitting Diode) or other materials.
The power supply 306 is used to power the various components in the electronic device. The power source 306 may be alternating current, direct current, disposable or rechargeable. When the power source 306 comprises a rechargeable battery, the rechargeable battery may support wired or wireless charging. The rechargeable battery may also be used to support fast charge technology.
Those skilled in the art will appreciate that the architecture shown in fig. 1 is not limiting of the network device and may include more or fewer components than shown, or may combine certain components, or a different arrangement of components.
In addition, the embodiment of the application also provides a computer readable storage medium, wherein the computer readable storage medium stores a video playing program, and the video playing program realizes the steps of the video playing method when being executed by a processor. Therefore, a detailed description will not be given here. In addition, the description of the beneficial effects of the same method is omitted. For technical details not disclosed in the embodiments of the computer-readable storage medium according to the present application, please refer to the description of the method embodiments of the present application. As determined by way of example, the program instructions may be deployed to be executed on one network device or on multiple network devices located at one site or, alternatively, on multiple network devices distributed across multiple sites and interconnected by a communication network.
Those skilled in the art will appreciate that implementing all or part of the above-described methods may be accomplished by way of computer programs, which may be stored on a computer-readable storage medium, and which, when executed, may comprise the steps of the embodiments of the methods described above. The computer readable storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random access Memory (Random AccessMemory, RAM), or the like.
Based on the above hardware structure, an embodiment of the video playing method of the present invention is provided.
Referring to fig. 2, fig. 2 is a flowchart of a first embodiment of a video playing method according to the present invention, where the method is used for a network device, and the method includes the following steps:
step S11: and receiving a plurality of interest video requests sent by a plurality of clients, wherein the interest video requests are generated according to a first preset rule based on the requirement video information sent by the user.
It should be noted that the execution body of the present invention is a network device, the structure of the network device is described above with reference to the network device, and the network device installs a video playing program, and when the network device executes the video playing program, the steps of the video playing method of the present invention are implemented. The network devices may be routers, gateways, and the like.
In some embodiments, the execution subject of the present invention may also be an ingress server in a server cluster, where the ingress server communicates data directly with the client without a network device.
In the method of the present invention, the client may be a mobile terminal or a mobile terminal equipped with a client video playback program. The plurality of clients in step S11 may be in an autonomous domain, where the plurality of clients in the autonomous domain communicate with other servers in the server cluster through a network device or an ingress server, where the servers in the server cluster further include a key server, a video server (a server where the preset video library is located), and so on.
It is understood that the user transmits the desired video information even though the user wants to view the description information of the video, such as the video name, the video release date, and the key character information in the video. The first preset rule refers to a rule for generating an interest video request and generating a video identification, and the method for generating the interest video request and generating the video identification is similar, but has a difference, that is, the first preset rule is different for generating the interest video request and generating the video identification.
When generating an interest video request according to a first preset rule based on the requirement video information, it means that some special additional information is added to the requirement video information to obtain the interest video request, for example, the interest video request may be: for the case of/NDN/CN/AC/PCL/Video/XXX (Video file name), the first preset rule means to add fields of "/NDN/CN/AC/PCL/Video/" etc. before Video information is required.
Step S12: when a plurality of interest video requests meet preset conditions, acquiring target video files with video identifications matched with the interest video requests from a preset video library, wherein the video identifications in the preset video library are generated according to the first preset rule based on description information of the video files in the preset video library.
It should be noted that, when the required videos corresponding to the interest video requests are the same, the interest video requests satisfy a preset condition, which means that the videos that the clients want to see are the same. And then, acquiring a target video file with the video identification matched with the interest video request from a preset video library in the video server.
Specifically, the description information of the video file in the preset video library may also be the video name of the video file, the video release date and the key character information in the video. When the video identifier is generated according to the first preset rule based on the description information of the video file, additional characters can be added into the video description information, for example, the video identifier can be: the first preset rule is to add "/NDN/CN/AC/PCL/Video/" characters before Video description information and "/version=xxx/block=yyy" characters after Video description information, where version=xxx and block=yy represents the number of a certain slice of the same Video file (the steps related to the slice are specifically described below). It will be appreciated that the video information required and the video description information described above in the present invention are typically video names.
It will be appreciated that the Video identification matches the interest Video request, i.e. the Video identification is the same Video as the Video corresponding to the interest Video request, in that the identification Video identification is the same as key information in the interest Video request, i.e. the identification Video identification is the key information as "/NDN/CN/AC/PCL/Video/XXX (Video file name)" in the interest Video request, their key information is exactly the same, and the Video identification matches the interest Video request. And if the video identification of one video file is matched with the interest video request, the video file is a target video file.
It should be noted that the video server searches the preset video library directly by means of the longest naming proportion to obtain the target video file, and directly responds to the client. If the client has the appointed version, firstly searching the mapping relation between the video identification and the version number in the preset video library, confirming whether the appointed version exists, responding to NACK package response if not, otherwise, searching the target video file corresponding to the appointed version after finding the appointed version, responding to NACK package response if not, otherwise, directly responding to the target video file package to the client.
Further, before the step of obtaining the target video file with the video identifier matching the interest video request from the preset video library, the method further includes: when an original video file is obtained, performing format conversion on the original video file to obtain an intermediate video file; cutting the intermediate video file into a plurality of preprocessed video files of a fixed size; generating preset keys corresponding to a plurality of the preprocessed video files; encrypting a plurality of the preprocessed video files by using the preset key to obtain a plurality of encrypted video files; acquiring original video description information of the original video file and sequence information of a plurality of encrypted video files; generating a plurality of preset video identifications of a plurality of encrypted video files by using the original video description information, the sequence information of the plurality of encrypted video files and the first preset rule, wherein one encrypted video file corresponds to one preset video identification; acquiring the preset video library based on a plurality of the encrypted video files and a plurality of the preset video identifications; acquiring preset description information of the preset secret key based on a plurality of preset video identifications; based on the preset description information, generating a preset key identifier of the preset key according to a second preset generation rule; and sending the preset key and the preset key identification to the key server.
The original video file may be purchased from the program copyrighter by a video server of the carrier and then converted (e.g., video.mp4) into intermediate video files of various formats under a certain streaming protocol, such as play.m3u8, xxx.m4s, iframe.m3u8, main.m3u8, init.mp4, etc. video files under HLS protocol.
Then, the video server cuts the intermediate video file into a plurality of preprocessed video files of a fixed size; continuing to generate a corresponding preset key (the preset key is used for encrypting a plurality of preprocessed video files corresponding to the original video file and can be any type of key) by the key server, and encrypting the plurality of preprocessed video files after cutting by the video server by using the preset key; meanwhile, the video server generates a plurality of video identifications of the encrypted video files, namely a plurality of preset video identifications, according to the first preset rule; the sequence information of the plurality of encrypted video files is the sequence number of an encrypted video file in the original video file (the sequence may be the playing time sequence of the video file). The step of generating the preset video identifier according to the first generation rule is described above, and will not be described again.
The second preset rule refers to a rule for generating the key identification and the required key information, which are similar in method but have differences, that is, the second preset rule is different for generating the key identification and the required key information
Meanwhile, the preset secret key used for encryption also needs to be processed, and for a plurality of encrypted video files obtained based on one original video file, preset description information of the preset secret key needs to be obtained based on the preset video identifier, wherein the preset description information represents the encrypted video file corresponding to the preset secret key, and for example, the preset description information of the preset secret key can be the secret key of the A video; and then generating a preset key identifier according to a second preset rule based on the preset description information, wherein the preset key identifier can be: the second preset rule is to add extra characters "/NDN/CN/AC/PCL/Video/" and "Keyid/" characters into preset description information when generating the key identification.
It can be understood that, if the same original video file corresponds to multiple different versions, the multiple versions corresponding to the original video file also need to be subjected to the steps of encrypting the video file and performing the key processing, which are not described herein, that is, version information version=xxx must be added in the video identifier and the key identifier. Meanwhile, the video identifier, the interest video request, the key identifier and the required key information all need to have version numbers so as to index corresponding information through the version numbers.
Step S13: and sending the target video file to a plurality of clients so that the clients play the target video file.
Specifically, as described above with reference to the target video file, the target video file is encrypted; before the step of sending the target video file to the plurality of clients to enable the plurality of clients to play the target video file, the method further includes: generating demand key information according to a second preset rule based on the target video identification of the target video file; the key information is sent to a key server, so that the key server returns a target key with a key identification matched with the key information, and the key identification in the key server is generated according to a second preset rule based on the description information of the key in the key server; correspondingly, the step of sending the target video file to a plurality of clients to enable the clients to play the target video file includes: and sending the target video file and the target key to a plurality of clients so that the clients decrypt the target video file by using the target key and play the decrypted target video file.
It will be appreciated that, with reference to the above description, for the target Video file, the corresponding target Video identifier may be/NDN/CN/AC/PCL/Video/XXX (Video file name)/version=xxx/block=yyy, and the required key information generated by using the second rule has a similar structure to the key identifier described above, and may be: NDN/CN/AC/PCL/Video/XXX (Video file name)/Keyid/version=xxx. For obtaining the required key information by using the target video identifier, the second preset rule is to change some characters in the target video identifier (delete/block=yyyy) and add a key identifier character (Keyid /).
It will be appreciated that the key identification matches the required key information, i.e. the key identification is the same key as the key corresponding to the required key information, e.g. the key identification is exactly the same as "/NDN/CN/AC/PCL/Video/XXX (Video file name)/Keyid/version=xxx" in the required key information, i.e. the identification Video identification matches the Video request of interest.
Further, with reference to the foregoing, before the step of sending the target video file and the target key to the plurality of clients, so that the plurality of clients decrypt the target video file using the target key and play the decrypted target video file, the method further includes: when receiving registration information sent by a plurality of clients, acquiring a root key based on the registration information; transmitting the root key to a plurality of clients so that the plurality of clients store the root key; encrypting the target key by using the root key to obtain an encryption key; the step of sending the target video file and the target key to a plurality of clients so that the clients decrypt the target video file by using the target key and play the decrypted target video file includes: and sending the target video file and the encryption key to a plurality of clients so that the clients decrypt the encryption key by using the root key to obtain the target key, decrypt the target video file by using the target key and play the decrypted target video file.
When the user receives the registration information of the user, the user registration is successful, the root key is generated, one client corresponds to one user, and one client corresponds to one root key. The root key is used for protecting the target key and avoiding the leakage of the target key.
Further, as described above with reference to the target video file comprising a plurality of diced video files, each of the diced video files being encrypted; the method further includes, before the steps of sending the target video file and the encryption key to the plurality of clients, so that the plurality of clients decrypt the encryption key by using the root key, obtain the target key, decrypt the target video file by using the target key, and play the decrypted target video file: obtaining access credentials of a plurality of clients based on the registration information; the step of sending the target video file and the encryption key to a plurality of clients so that the clients decrypt the encryption key by using the root key to obtain the target key, decrypt the target video file by using the target key, and play the decrypted target video file includes: and if the access certificate is matched with the plurality of diced video files, sending the plurality of diced video files and the encryption key to a plurality of clients so that the plurality of clients decrypt the encryption key by using the root key to obtain the target key, decrypt the plurality of diced video files by using the target key to obtain decrypted plurality of diced video files, merging the decrypted plurality of diced video files into a playing video file, and playing the playing video file.
Meanwhile, when the user registration is successful, an access credential needs to be generated, one client corresponds to one user, and one client corresponds to one access credential. When the access credentials of a client match a plurality of the diced video files, this indicates that the client can access and view the plurality of diced video files, at which point the following steps are continued.
If the access certificate of a client is not matched with the plurality of segmented video files, the client cannot access or view the plurality of segmented video files, at the moment, no subsequent step is executed, feedback information is directly returned to the client, and the feedback information can be that you do not have permission.
The video obtained by the client is a plurality of video blocks, and the video blocks need to be combined to continue playing.
Further, the preset key comprises a first key and a second key; the step of encrypting the plurality of preprocessed video files by using a preset key to obtain a plurality of encrypted video files comprises the following steps: acquiring sequence information of a plurality of the preprocessed video files; and encrypting the preprocessed video files with the sequence information being odd numbers by using the first key, and encrypting the preprocessed video files with the sequence information being even numbers by using the second key to obtain a plurality of encrypted video files.
It will be appreciated that to enhance the fine-grained access control functionality and hardware usage of video we define both polarity keys (the first key and the second key) in parity, i.e. different preprocessed video files are encrypted using different symmetric keys; the serial numbers of the preprocessed Video files (the serial numbers are expressed as sequence information, a plurality of the preprocessed Video files are usually diced according to the playing time sequence of the Video, the playing time sequence of the preprocessed Video files with the prior sequence information is also prior), an odd key (yyyy% 2=1) is used when the serial numbers are odd numbers, otherwise, an even key (yyyyy% 2=0) is used, and at the moment, the corresponding key identification and the required key information are "/NDN/CN/AC/PCL/Video/XXX (Video file name)/Keyid
Version=xxx/block=yyy). It can be seen that in this embodiment, the key identifier and the required key information also have a mapping relationship with the version of the video file, i.e. the same video file of different versions, and the corresponding key identifier, required key information and key are all different.
Similarly, for the decryption process, the first key and the second key need to be acquired, decryption is performed by using the first key and the second key, so as to obtain a plurality of decrypted preprocessed video files, and then the plurality of decrypted preprocessed files are combined into a playing video file, and the client side continues to play the playing video file.
Further, before the step of obtaining the target video file with the video identifier matching the interest video request from the preset video library, the method further includes: acquiring a first network address of the preset video library and a second network address of the key server; acquiring a network address conversion table based on the first network address, the second network address and preset description information; correspondingly, the step of acquiring the target video file with the video identifier matched with the interest video request from the preset video library comprises the following steps: acquiring a target video file with a video identifier matched with the interest video request from a preset video library by using the network address conversion table; correspondingly, the step of sending the required key information to a key server includes: and transmitting the required key information to a key server by using the network address translation table.
In order to facilitate the network device to quickly acquire the target Video file and the target key, the network address translation table (NAT table) needs to be acquired, where the first network address and the second network address in the address translation table have a mapping relationship with preset description information, where the preset description information may be "/NDN/CN/AC/PCL/Video" characters, or the like, and the characters are used to represent Video service information. The address conversion table is used for determining corresponding selected service description information in the address conversion table by the network equipment by utilizing the service description information in the received interest video request and the requirement key information, and then determining a first network address and a second network address corresponding to the selected service description information as network addresses for acquiring the video file and the key.
For example, the preset description information in the address conversion table may be "/NDN/CN/AC/PCL/Video" character, where the first network address is 172.Xxx, and the mapping relationship of the data in the obtained network address conversion table is: [/NDN/CN/AC/PCL/Video:172.Xxx.
Further, the plurality of clients, the preset video library and the key server are in an autonomous domain; after the step of obtaining the network address translation table based on the first network address, the second network address and the preset description information, the method further includes: broadcasting the network address translation table to shared network devices of non-autonomous domains outside the autonomous domain, such that the shared network devices receive and store the network address translation table; when receiving a network request sent by the shared network equipment by utilizing the network address translation table, extracting a plurality of new interest video requests from the network request, wherein the network request is sent through a tunneling protocol, and the network request is generated according to a third preset rule based on the plurality of new interest video requests of a plurality of related clients; updating a plurality of interest video requests with a plurality of new interest video requests, and updating a plurality of clients with a plurality of associated clients; returning to the step of executing the target video file with the video identification matched with the interest video requests from a preset video library when the interest video requests meet the preset conditions until a new target video file is obtained; generating a forwarding video file according to a third preset rule based on the new target video file; and sending the forwarding video file to a plurality of related clients through the tunneling protocol, so that the plurality of related clients obtain a new playing video file corresponding to the new target video file based on the forwarding video file, and play the new playing video file.
It can be understood that the forwarding video file is the same as the target video file, and includes a plurality of diced video files, and each diced video file is encrypted, and the decryption and splicing processes are performed by a specific client, which is not described herein.
And the other autonomous domains outside the autonomous domain are the non-autonomous domains, and the clients in the non-autonomous domains are the relevant clients. The method for installing the client side comprises the steps that a related client side obtains a new interest video request; and packaging the new video request into a network request in the form of an IP header, a UDP/TCP header, an extensible option and a new interest video request, namely generating the network request according to a third preset rule, and similarly packaging the new target video file into a data packet in the form of the IP header, the UDP/TCP header, the extensible option and the new target video file, namely generating the forwarding video file according to the third preset rule. It will be appreciated that the third preset rule is different for the processing of new interest video requests and new target video files.
Network devices in different autonomous domains store network address conversion tables broadcasted mutually, so that each network device can acquire video files in servers corresponding to other network devices through the network address conversion tables. The transmission of video files in different autonomous domains is realized.
The technical scheme of the invention provides a video playing method, which is characterized in that a plurality of interest video requests sent by a plurality of clients are received, and the interest video requests are generated according to a first preset rule based on video information required to be sent by a user; when a plurality of interest video requests meet preset conditions, acquiring target video files with video identifications matched with the interest video requests from a preset video library, wherein the video identifications in the preset video library are generated according to the first preset rule based on description information of the video files in the preset video library; and sending the target video file to a plurality of clients so that the clients play the target video file.
In the existing method, when the plurality of interest video requests meet the preset condition, it is indicated that the target videos corresponding to the plurality of interest video requests are identical, the target video file needs to be repeatedly acquired from the preset video library for a plurality of times, and the target video files acquired for a plurality of times are respectively sent to a plurality of clients for playing, so that the distribution pressure of the preset video library is higher. When the plurality of interest video requests meet the preset conditions, the method only needs to acquire the target video file once from the preset video library, and respectively send the target video file to a plurality of clients for playing, and the target video does not need to be repeatedly acquired from the preset video library for a plurality of times, so that the shunt pressure of the preset video library is reduced, and the stream jumping balance of the preset video library is improved.
Referring to fig. 3, fig. 3 is a block diagram showing a first embodiment of a video playing apparatus according to the present invention, the apparatus being used for a network device, the apparatus comprising:
the receiving module 10 is configured to receive a plurality of interest video requests sent by a plurality of clients, where the interest video requests are generated according to a first preset rule based on video information required to be sent by a user;
the obtaining module 20 is configured to obtain, when the plurality of interest video requests meet a preset condition, a target video file with a video identifier matched with the interest video request from a preset video library, where the video identifier in the preset video library is generated according to the first preset rule based on description information of the video file in the preset video library;
and the sending module 30 is configured to send the target video file to a plurality of the clients, so that the plurality of clients play the target video file.
It should be noted that, since the steps executed by the apparatus of this embodiment are the same as those of the foregoing method embodiment, specific implementation manners and technical effects that can be achieved of the apparatus of this embodiment may refer to the foregoing embodiment, and will not be repeated herein.
The foregoing description is only of the optional embodiments of the present invention, and is not intended to limit the scope of the invention, and all the equivalent structural changes made by the description of the present invention and the accompanying drawings or the direct/indirect application in other related technical fields are included in the scope of the invention.
Claims (8)
1. A video playing method for an NDN network, the method comprising the steps of:
receiving a plurality of interest video requests sent by a plurality of clients, wherein the interest video requests are generated according to a first preset rule based on the requirement video information sent by a user; the interest video request is an NDN interest packet;
when a plurality of interest video requests meet preset conditions, acquiring target video files with video identifications matched with the interest video requests from a preset video library, wherein the video identifications in the preset video library are generated according to the first preset rule based on description information of the video files in the preset video library;
sending the target video file to a plurality of clients so that the clients play the target video file;
before the step of obtaining the target video file with the video identifier matched with the interest video request from the preset video library, the method further includes:
When an original video file is obtained, performing format conversion on the original video file to obtain an intermediate video file;
cutting the intermediate video file into a plurality of preprocessed video files of a fixed size;
generating preset keys corresponding to a plurality of the preprocessed video files;
encrypting a plurality of the preprocessed video files by using the preset key to obtain a plurality of encrypted video files;
acquiring original video description information of the original video file and sequence information of a plurality of encrypted video files;
generating a plurality of preset video identifications of a plurality of encrypted video files by using the original video description information, the sequence information of the plurality of encrypted video files and the first preset rule, wherein one encrypted video file corresponds to one preset video identification;
acquiring the preset video library based on a plurality of the encrypted video files and a plurality of the preset video identifications;
acquiring preset description information of the preset secret key based on a plurality of preset video identifications;
based on the preset description information, generating a preset key identifier of the preset key according to a second preset generation rule;
transmitting the preset key and the preset key identification to a key server;
The preset key comprises a first key and a second key; the step of encrypting the plurality of preprocessed video files by using a preset key to obtain a plurality of encrypted video files comprises the following steps:
acquiring sequence information of a plurality of the preprocessed video files;
and encrypting the preprocessed video files with the sequence information being odd numbers by using the first key, and encrypting the preprocessed video files with the sequence information being even numbers by using the second key to obtain a plurality of encrypted video files so as to enhance the fine granularity access control function of the target video.
2. The method of claim 1, wherein the target video file is encrypted; before the step of sending the target video file to the plurality of clients to enable the plurality of clients to play the target video file, the method further includes:
generating demand key information according to a second preset rule based on the target video identification of the target video file;
the key information is sent to a key server, so that the key server returns a target key with a key identification matched with the key information, and the key identification in the key server is generated according to a second preset rule based on the description information of the key in the key server;
The step of sending the target video file to a plurality of clients to enable the clients to play the target video file includes:
and sending the target video file and the target key to a plurality of clients so that the clients decrypt the target video file by using the target key and play the decrypted target video file.
3. The method of claim 2, wherein the step of transmitting the target video file and the target key to a plurality of the clients to cause the plurality of the clients to decrypt the target video file using the target key and play the decrypted target video file is preceded by the step of:
when receiving registration information sent by a plurality of clients, acquiring a root key based on the registration information;
transmitting the root key to a plurality of clients so that the plurality of clients store the root key;
encrypting the target key by using the root key to obtain an encryption key;
the step of sending the target video file and the target key to a plurality of clients so that the clients decrypt the target video file by using the target key and play the decrypted target video file includes:
And sending the target video file and the encryption key to a plurality of clients so that the clients decrypt the encryption key by using the root key to obtain the target key, decrypt the target video file by using the target key and play the decrypted target video file.
4. The method of claim 3, wherein the target video file comprises a plurality of diced video files, each of the diced video files being encrypted; the method further includes, before the steps of sending the target video file and the encryption key to the plurality of clients, so that the plurality of clients decrypt the encryption key by using the root key, obtain the target key, decrypt the target video file by using the target key, and play the decrypted target video file:
obtaining access credentials of a plurality of clients based on the registration information;
the step of sending the target video file and the encryption key to a plurality of clients so that the clients decrypt the encryption key by using the root key to obtain the target key, decrypt the target video file by using the target key, and play the decrypted target video file includes:
And if the access certificate is matched with the plurality of diced video files, sending the plurality of diced video files and the encryption key to a plurality of clients so that the plurality of clients decrypt the encryption key by using the root key to obtain the target key, decrypt the plurality of diced video files by using the target key to obtain decrypted plurality of diced video files, merging the decrypted plurality of diced video files into a playing video file, and playing the playing video file.
5. The method of claim 2, wherein prior to the step of retrieving from a preset video library a target video file having a video identification matching the video request of interest, the method further comprises:
acquiring a first network address of the preset video library and a second network address of the key server;
acquiring a network address conversion table based on the first network address, the second network address and preset description information;
the step of obtaining the target video file with the video identification matched with the interest video request from the preset video library comprises the following steps:
acquiring a target video file with a video identifier matched with the interest video request from a preset video library by using the network address conversion table;
The step of sending the required key information to a key server includes:
and transmitting the required key information to a key server by using the network address translation table.
6. The method of claim 5, wherein a plurality of the clients, the pre-set video library, and the key server are within an autonomous domain; after the step of obtaining the network address translation table based on the first network address, the second network address and the preset description information, the method further includes:
broadcasting the network address translation table to shared network devices of non-autonomous domains outside the autonomous domain, such that the shared network devices receive and store the network address translation table;
when receiving a network request sent by the shared network equipment by utilizing the network address translation table, extracting a plurality of new interest video requests from the network request, wherein the network request is sent through a tunneling protocol, and the network request is generated according to a third preset rule based on the plurality of new interest video requests of a plurality of related clients;
updating a plurality of interest video requests with a plurality of new interest video requests, and updating a plurality of clients with a plurality of associated clients;
Returning to the step of executing the target video file with the video identification matched with the interest video requests from a preset video library when the interest video requests meet the preset conditions until a new target video file is obtained;
generating a forwarding video file according to a third preset rule based on the new target video file;
and sending the forwarding video file to a plurality of related clients through the tunneling protocol, so that the plurality of related clients obtain a new playing video file corresponding to the new target video file based on the forwarding video file, and play the new playing video file.
7. A network device, the network device comprising: a memory, a processor and a video playback program stored on the memory and running on the processor, which when executed by the processor implements the steps of the video playback method of any one of claims 1 to 6.
8. A computer readable storage medium, characterized in that the computer readable storage medium has stored thereon a video playback program which, when executed by a processor, implements the steps of the video playback method of any one of claims 1 to 6.
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