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WO2018176816A1 - Procédé et dispositif de demande et lecture de vidéo - Google Patents

Procédé et dispositif de demande et lecture de vidéo Download PDF

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Publication number
WO2018176816A1
WO2018176816A1 PCT/CN2017/107056 CN2017107056W WO2018176816A1 WO 2018176816 A1 WO2018176816 A1 WO 2018176816A1 CN 2017107056 W CN2017107056 W CN 2017107056W WO 2018176816 A1 WO2018176816 A1 WO 2018176816A1
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WO
WIPO (PCT)
Prior art keywords
key value
video
target video
user terminal
server
Prior art date
Application number
PCT/CN2017/107056
Other languages
English (en)
Chinese (zh)
Inventor
周志刚
张文明
陈少杰
Original Assignee
武汉斗鱼网络科技有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 武汉斗鱼网络科技有限公司 filed Critical 武汉斗鱼网络科技有限公司
Publication of WO2018176816A1 publication Critical patent/WO2018176816A1/fr

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Classifications

    • 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
    • H04N21/26613—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 for generating or managing keys in general
    • 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
    • H04N21/254—Management at additional data server, e.g. shopping server, rights management server
    • H04N21/2541—Rights Management
    • 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
    • H04N21/258—Client or end-user data management, e.g. managing client capabilities, user preferences or demographics, processing of multiple end-users preferences to derive collaborative data
    • H04N21/25808—Management of client data
    • H04N21/25816—Management of client data involving client authentication
    • 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
    • H04N21/258—Client or end-user data management, e.g. managing client capabilities, user preferences or demographics, processing of multiple end-users preferences to derive collaborative data
    • H04N21/25866—Management of end-user data
    • H04N21/25875—Management of end-user data involving end-user authentication

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a video request, a video playing method, and a device.
  • the live video broadcast is performed by using the Internet and streaming media technology, and then the video content provider has the video stream address obtained by the third-party platform, so that the video can be directly viewed without going through the live website, that is, the video player bypassing the live website.
  • the video provided is also played.
  • there are some paid video content for the live website For example, the ticket room of the live website can only be viewed when the ticket is purchased.
  • the VIP member can purchase the VIP video, so If the video stream address is stolen, the user who has not purchased the ticket can directly view the ticket room, and the user who does not purchase the VIP member can directly watch the VIP video, and also brings the risk of personal information leakage to the user.
  • the prior art encrypts the video stream address to prevent the video stream address from being stolen, but only the encrypted video stream address is easily cracked, so the video stream address is low in security. Video is easily obtained illegally.
  • the embodiment of the invention solves the technical problem of low video stream address security in the prior art by providing a video request, a video playing method and a device.
  • an embodiment of the present invention provides a video playing method, which is applied to a server, where the method includes:
  • the method further includes:
  • the method further includes:
  • the received authentication key value is a terminal-side authentication key value for the target video.
  • the generating the server-side authentication key value for the target video based on the first key value, the second key value, and the request identification identifier group including:
  • the request identifies the identifier group, including:
  • the request identification identifier group further includes a room identification code where the target network live video is located, and the second key value includes a permission range of the viewing user.
  • the live type identification code and the room identification code of the live network video are included in the request identification identifier group.
  • an embodiment of the present invention provides a video requesting method, which is applied to a user terminal, and includes:
  • the generating, according to the first key value and the second key value, a terminal side authentication key value for the target video and sending To the server including:
  • a terminal side authentication key value for the target video is sent to the server.
  • the generating, by the first key value, the second key value, and the request identification identifier group, a terminal side authentication key value for the target video including:
  • the request identification identifier group carried in the video stream address request includes:
  • the request identification identifier group further includes a room identification code where the target network live video is located, and the second key value includes the permission range of the viewing user.
  • the video type identification code of each webcast video and the room identification code is not limited to the video type identification code.
  • an embodiment of the present invention provides a video playback device, which is applied to a server, where the video playback device includes:
  • An address request receiving module configured to receive a video stream address request for the target video sent by the user terminal
  • a Key value sending module configured to return, to the user terminal, a first Key value for characterizing a video type of the target video and for characterization if a viewing user corresponding to the user terminal has viewing rights to the target video Viewing a second Key value of a user's permission range;
  • a video returning module configured to: when receiving, by the user terminal, a terminal-side authentication key value for the target video generated by using the first key value and the second key value, returning to the user terminal The target video.
  • the device further includes:
  • the authority discriminating module is configured to determine, according to the correspondence between the user identification information and the permission range, whether the viewing user has viewing rights to the target video.
  • the device further includes:
  • An authentication key value generating module configured to generate a server side authentication key value for the target video based on the first key value, the second key value, and the request identification identifier group;
  • the authentication key value comparison module is configured to compare the received authentication key value with the server-side authentication key value of the target video, and if yes, the received authentication key value is The terminal side authentication key value of the target video.
  • the authentication key value generating module is specifically configured to:
  • the request identifies the identifier group, including:
  • the request identification identifier group further includes a room identification code where the target network live video is located, and the second key value includes a permission range of the viewing user.
  • the live type identification code and the room identification code of the live network video are included in the request identification identifier group.
  • an embodiment of the present invention provides a video requesting apparatus, which is applied to a user terminal, where the video requesting apparatus includes:
  • An address request sending module configured to send a video stream address request for the target video to the server
  • a Key value receiving module configured to receive a first Key value returned by the server for characterizing a video type of the target video, and a second Key value for characterizing a permission range of the viewing user;
  • An authentication key value obtaining module configured to generate, according to the first key value and the second key value, a terminal side authentication key value for the target video, and send the value to the server, so that the server receives Returning the target video to the user terminal when the terminal side authenticates the Key value of the target video;
  • a video receiving module configured to receive the target video from the server.
  • the authentication key value obtaining module includes:
  • the authentication key value generating unit is configured to generate a terminal side authentication key value for the target video based on the first key value, the second key value, and the request identification identifier group;
  • the authentication key value sending unit is configured to send the terminal side authentication key value for the target video to the server.
  • the authentication key value generating unit is specifically configured to:
  • the request identification identifier group carried in the video stream address request includes:
  • the request identification identifier group further includes a room identification code where the target network live video is located, and the second key value includes the permission range of the viewing user.
  • the video type identification code of each webcast video and the room identification code is not limited to the video type identification code.
  • the technical solution provided by the present invention is: receiving a video stream address request for a target video sent by a user terminal; and if the viewing user corresponding to the user terminal has viewing rights to the target video, returning a video for characterizing the target video to the user terminal a first Key value of the type and a second Key value for characterizing a permission range of the viewing user; receiving the terminal-side authentication Key value for the target video generated by the user terminal based on the first Key value and the second Key value Return the target video to the user terminal.
  • the video stream address is authenticated according to the video type of the target video and the permission range of the viewing user, so that different types of the target video and different viewing rights of the viewing user are calculated, and different server side and terminal side are calculated.
  • the server For the authentication KEY value for authenticating the video stream address, the server only returns the requested target video for the user terminal that generates the authentication KEY value based on the first and second KEY values, so only the viewing rights of the target video are actually available.
  • the user can obtain the target video from the server, otherwise the server will refuse to deliver the target video. Therefore, the accuracy of authenticating the video stream address is greatly enhanced, and the video stream address can be prevented from being illegally acquired, thereby improving the security of the video stream address.
  • the video stream address request carries the request identification identifier group, including the time identifier of the time when the user terminal sends the video stream address request, so that the generated authentication KEY values of the server side and the terminal side are dependent on non-repetitiveness and
  • the reproducible time identifier further ensures that the calculated authentication KEY value will not be imitated every time, so when a viewing user requests the correct address, it cannot be used by other viewing users because a video stream address can only be used. Use once.
  • FIG. 1 is a flowchart of a video playing method according to an embodiment of the present invention
  • FIG. 2 is a flowchart of a video request method according to an embodiment of the present invention.
  • FIG. 3 is a block diagram of a video playback apparatus according to an embodiment of the present invention.
  • FIG. 4 is a block diagram of a video requesting apparatus according to an embodiment of the present invention.
  • the embodiment of the present invention provides a video request, a video playing method, and a device.
  • the general idea is as follows:
  • the video stream address is authenticated according to the first Key value of the video type of the target video and the second Key value for characterizing the viewing range of the viewing user. Therefore, for different types of target videos and different permission ranges of the viewing users, different authentication KEY values for authenticating the video stream addresses on the server side and the terminal side are calculated, and the server is only based on the first and second servers.
  • the KEY value generates the target video of the user terminal that authenticates the KEY value, thereby greatly enhancing the accuracy of authenticating the video stream address, thereby preventing the video stream address from being illegally acquired, and improving the security of the video stream address. .
  • an embodiment of the present invention provides a video playing method, including the following steps:
  • S101 Receive a video stream address request for a target video that is sent by the user terminal.
  • the target video may be a live webcast video or a recorded video resource stored on a server.
  • the server is provided with a ticket system or a VIP authentication system for different video types.
  • Webcast video settings have different ticket types, and different video types are set for different video types.
  • the viewing user's permission range of the game ticket is all game-type live rooms, the viewing user with the game ticket has the viewing right for the game-like video; and the viewing range of the viewing user with the sports ticket
  • the viewing users who have game tickets have the right to watch sports videos; the viewing rights of the viewing users with variety tickets are the variety live rooms, and the viewing users with game tickets have watched the variety videos. Permissions.
  • the ticket system is configured to identify whether the viewing user corresponding to the user terminal that sends the video stream address request has a ticket of the video type to which the target video belongs, thereby determining whether the viewing user has viewing rights to the target video.
  • the video stream address request in order to determine whether the viewing user has the viewing right for the target video, carries the user identification information of the viewing user corresponding to the user terminal, such as a username and a password.
  • the server stores the permission range corresponding to each user identification information, so that the server determines whether the viewing user corresponding to the user terminal has the viewing right for the target video according to the correspondence between the user identification information and the permission range. If the viewing user does not have the viewing right for the target video, the server directly rejects the video stream address request of the user terminal, and does not return to the user terminal the first Key value for characterizing the video type of the target video and the permission range for characterizing the viewing user. The second key value. If the viewing user has viewing rights to the target video, the server returns to the user terminal a first Key value for characterizing the video type of the target video and a second Key value for characterizing the viewing range of the viewing user.
  • the ticket class KEY value corresponds to the video type one by one, and the ticket class KEY value may be a random string, then the first key value is A string representing the video type of the target video. For example, if the target video is a sports video, the first key value is specifically a character string indicating that the target video is a sports video. For example, if the target video is a game video, the first key value is specifically to represent the target video as a game video. String.
  • the second key value includes the live broadcast type identification code and the room identification code of each live webcast video within the scope of the user's permission.
  • the live type identification code and the room identification code of each live webcast video in the user's permission range are input into the MD5 algorithm, and the second KEY value is obtained by the operation:
  • KEY2 MD5.create(roomid+type)
  • the roomid is the room identification code of each webcast live video within the scope of the user's permission
  • the type is the live type identification code of each webcast live video within the scope of the user's permission.
  • the process proceeds to S103.
  • the target video is returned to the user terminal.
  • the terminal-side authentication key value of the target video is specifically generated by the user terminal according to the following manner:
  • the user terminal If the user terminal receives the first key value and the second key value from the server, the user terminal generates a terminal side authentication key value for the target video based on the first key value and the second key value, and sends the value to the server.
  • the video type of the target video and the permission range of the viewing user are used as the KEY value of the video stream address authentication, so that different authentication KEY values can be obtained for different video types and different permission ranges, and the same video stream address is sent.
  • Receiver The server and the user terminal can always maintain the same authentication KEY value, which can greatly improve the accuracy of video address authentication and avoid illegal acquisition.
  • the terminal side authentication key value for the target video is generated based on the first key value, the second key value, and the request identification identifier group.
  • the request identification identifier group includes a time identifier indicating a time when the user terminal sends the video stream address request, and a terminal feature of at least one type of user terminal: a token (Token) when the user logs in to the server, and a unique ID of the user terminal. (UDID, Unique Device Identifier), the current IP address of the user terminal. Therefore, the video stream address authentication is implemented depending on the time, so that the calculated video stream address is different each time, because the uniqueness of time makes a video stream address can be used only once, so when the viewing user requests the correct The video stream address is not available to others, further improving the security of the video stream address.
  • a token When the user logs in to the server, and a unique ID of the user terminal.
  • UDID Unique Device Identifier
  • the request identification identifier group carried in the video stream address request further includes the room identification code of the target network live video, thereby further improving the video stream address security of the webcast video.
  • the server side provides the following implementation process:
  • the server generates a server-side authentication key value for the target video based on the first key value, the second key value, and the request identification identifier group, and compares the received authentication key value with the server-side authentication key value for the target video. Whether it is consistent; if it is consistent, the received authentication key value is a terminal-side authentication key value for the target video generated by the user terminal based on the first key value and the second key value, and the server returns the target to the user terminal. Video; if it is inconsistent, the received authentication key value is sent by other terminals, and the target video is rejected.
  • MD5 messages digest Algorithms for algorithm and RSA encryption algorithms
  • first Key value and the second Key value are input into the MD5 algorithm to obtain an intermediate Key value:
  • NewKey MD5.Create(KEY1+KEY2)
  • NewKey is the intermediate Key value
  • KEY1 is the first Key value
  • KEY2 is the second Key value.
  • the intermediate key value and the request identification identifier group are input into the RSA encryption algorithm to calculate the server side authentication key value for the target video:
  • KEY RSA.encrypt(Token+Roomid+ID+IP+Time, NewKey);
  • the time parameter is the time identifier of the user terminal to send the video stream address request
  • the Token parameter is the token when the user logs in to the server
  • the ID parameter is the unique ID of the user terminal (UDID, Unique Device Identifier)
  • the IP parameter is the current state of the user terminal. IP address.
  • an embodiment of the present invention provides a video requesting method, which is applied to a user terminal corresponding to the foregoing video playing method.
  • the video requesting method includes:
  • S202 Receive a first Key value returned by the server for characterizing a video type of the target video, and a second Key value used to represent a permission range of the viewing user.
  • S203 Generate a terminal-side authentication key value for the target video according to the first key value and the second key value, and send the value to the server, so that the server returns the target video to the user terminal when receiving the terminal-side authentication key value for the target video. ;
  • S203 includes the following refinement steps:
  • an implementation manner of generating a terminal-side authentication key value for the target video is specifically:
  • the request identification identifier group carried in the video stream address request includes: a time identifier indicating a time at which the user terminal sends the video stream address request, and at least one terminal feature of the user terminal as follows: The token when the user logs in to the server, the unique ID of the user terminal, and the current IP address of the user terminal are viewed.
  • the request identification identifier group further includes a room identification code where the target network live video is located, and the second key value includes each part of the viewing user's permission range.
  • the video type identifier of the live webcast video and the room identification code is included in the request identification identifier group.
  • the video request method embodiment corresponds to the technical features in the implementation of the foregoing video playing method, Therefore, based on the video playing method introduced by the present invention, those skilled in the art can understand the implementation manner of the video requesting device, and thus will not be described herein.
  • an embodiment of the present invention provides a video playing device for implementing the foregoing video playing method, which is applied to a server.
  • the video playing device includes:
  • the address request receiving module 301 is configured to receive a video stream address request for the target video sent by the user terminal;
  • the Key value sending module 302 is configured to: if the viewing user corresponding to the user terminal has the viewing right to the target video, return a first Key value for characterizing the video type of the target video to the user terminal, and Characterizing a second Key value of the range of rights of the viewing user;
  • a video returning module 303 configured to receive, by the user terminal, a terminal-side authentication key value for the target video generated by the first key value and the second key value, to the user terminal Return to the target video.
  • the device further includes:
  • the authority discriminating module is configured to determine, according to the correspondence between the user identification information and the permission range, whether the viewing user has viewing rights to the target video.
  • the device further includes:
  • An authentication key value generating module configured to generate a server side authentication key value for the target video based on the first key value, the second key value, and the request identification identifier group;
  • the authentication key value comparison module is configured to compare the received authentication key value with the server-side authentication key value of the target video, and if yes, the received authentication key value is The terminal side authentication key value of the target video.
  • the authentication key value generating module is specifically configured to:
  • the request identifying the identifier group includes:
  • the request identification identifier group further includes a room identification code where the target network live video is located, and the second key value includes the viewing user.
  • the live type identification code of each webcast live video within the scope of the permission And the room identification code.
  • the video playback device is a device for implementing the foregoing video playback method according to the embodiment of the present invention. Therefore, based on the video playback method introduced by the present invention, those skilled in the art can understand the specific structure and deformation of the video playback device, and thus No longer. Any device used in the video playing method of the present invention is within the scope of the present invention.
  • an embodiment of the present invention further provides a video requesting apparatus for implementing the foregoing video requesting method, which is applied to a user terminal.
  • the video requesting apparatus includes:
  • An address request sending module 401 configured to send a video stream address request for the target video to the server;
  • the Key value receiving module 402 is configured to receive a first Key value returned by the server for characterizing a video type of the target video and a second Key value used to represent a permission range of the viewing user;
  • the authentication key value obtaining module 403 is configured to generate a terminal side authentication key value for the target video according to the first key value and the second key value, and send the value to the server, so that the server receives Returning the target video to the user terminal when the terminal side authentication key value is used for the target video;
  • the video receiving module 404 is configured to receive the target video from the server.
  • the authentication key value obtaining module 403 includes:
  • the authentication key value generating unit is configured to generate a terminal side authentication key value for the target video based on the first key value, the second key value, and the request identification identifier group;
  • the authentication key value sending unit is configured to send the terminal side authentication key value for the target video to the server.
  • the authentication key value generating unit is specifically configured to:
  • the request identification identifier group carried in the video stream address request includes:
  • the request identification identifier group further includes a room identification code where the target network live video is located, and the second key value includes the rights of the viewing user.
  • the present video requesting device is an electronic device used in the foregoing video requesting method according to the embodiment of the present invention. Therefore, those skilled in the art can understand the specific structure and deformation of the video requesting device based on the method described in the video requesting method embodiment of the present invention. Therefore, it will not be repeated here.
  • the apparatus used in the video request method of the present invention is within the scope of the present invention.
  • the technical solution provided by the present invention is: receiving a video stream address request for a target video sent by a user terminal; and if the viewing user corresponding to the user terminal has viewing rights to the target video, returning a video for characterizing the target video to the user terminal a first Key value of the type and a second Key value for characterizing a permission range of the viewing user; receiving the terminal-side authentication Key value for the target video generated by the user terminal based on the first Key value and the second Key value Return the target video to the user terminal.
  • the video stream address is authenticated according to the video type of the target video and the permission range of the viewing user, so that different types of the target video and different viewing rights of the viewing user are calculated, and different server side and terminal side are calculated.
  • the server For the authentication KEY value for authenticating the video stream address, the server only returns the requested target video for the user terminal that generates the authentication KEY value based on the first and second KEY values, so only the viewing rights of the target video are actually available.
  • the user can obtain the target video from the server, otherwise the server will refuse to deliver the target video. Therefore, the accuracy of authenticating the video stream address is greatly enhanced, and the video stream address can be prevented from being illegally acquired, thereby improving the security of the video stream address.
  • the video stream address request carries the request identification identifier group, including the time identifier of the time when the user terminal sends the video stream address request, so that the generated authentication KEY values of the server side and the terminal side are dependent on non-repetitiveness and
  • the reproducible time identifier further ensures that the calculated authentication KEY value will not be imitated every time, so when a viewing user requests the correct address, it cannot be used by other viewing users because a video stream address can only be used. Use once.
  • embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.
  • computer-usable storage media including but not limited to disk storage, CD-ROM, optical storage, etc.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

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  • Engineering & Computer Science (AREA)
  • Databases & Information Systems (AREA)
  • Computer Security & Cryptography (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Computer Graphics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)

Abstract

L'invention concerne un procédé et un dispositif de demande et lecture de vidéo, appliqués au domaine des technologies de télécommunication. Le procédé de lecture de vidéo comprend les étapes consistant à : recevoir une demande d'adresse de flux vidéo émanant d'un terminal d'utilisateur et concernant une vidéo cible ; si un spectateur correspondant au terminal d'utilisateur détient l'autorisation de visualiser la vidéo cible, renvoyer au terminal d'utilisateur une première valeur de clé représentant un type de la vidéo cible et une seconde valeur de clé représentant une plage d'autorisations du spectateur ; et renvoyer la vidéo cible au terminal d'utilisateur à réception, côté terminal, d'une valeur de clé d'authentification de la vidéo cible générée sur la base de la première valeur de clé et de la seconde valeur de clé et envoyée par le terminal d'utilisateur. L'invention résout le problème technique de faible sécurité d'une adresse de flux vidéo de l'état de la technique, et ainsi améliore nettement la précision d'authentification de l'adresse de flux vidéo et empêche l'acquisition illégale de l'adresse de flux vidéo, améliorant ainsi la sécurité de l'adresse de flux vidéo.
PCT/CN2017/107056 2017-03-31 2017-10-20 Procédé et dispositif de demande et lecture de vidéo WO2018176816A1 (fr)

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CN201710206554.0A CN107426589B (zh) 2017-03-31 2017-03-31 一种视频请求、视频播放方法及装置
CN201710206554.0 2017-03-31

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