WO2020097857A1 - Procédé et appareil de traitement de flux multimédia, support de stockage, et produit programme - Google Patents

Procédé et appareil de traitement de flux multimédia, support de stockage, et produit programme Download PDF

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Publication number
WO2020097857A1
WO2020097857A1 PCT/CN2018/115660 CN2018115660W WO2020097857A1 WO 2020097857 A1 WO2020097857 A1 WO 2020097857A1 CN 2018115660 W CN2018115660 W CN 2018115660W WO 2020097857 A1 WO2020097857 A1 WO 2020097857A1
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Prior art keywords
media stream
structured information
web front
computer
frequency
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PCT/CN2018/115660
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English (en)
Chinese (zh)
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鲁学研
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北京比特大陆科技有限公司
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Priority to CN201880098342.8A priority Critical patent/CN112930687B/zh
Priority to PCT/CN2018/115660 priority patent/WO2020097857A1/fr
Publication of WO2020097857A1 publication Critical patent/WO2020097857A1/fr

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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

Definitions

  • This application relates to the field of media streaming, for example, to a media stream processing method and device, a storage medium, and a program product.
  • the transmission of data on the network is not limited to text or graphics, and the spread of media streams such as sound and film and television brings new enjoyment to people.
  • playing media streams on a browser generally depends on the way of browser controls or plug-ins. Specifically, install the plug-in in the browser, and directly pull the media stream through the plug-in, and decode the pulled media stream to obtain a frame picture. Then, use frame synchronization to draw structured information to achieve structured information and video Frames are played synchronously.
  • the existing media stream processing method requires that a plug-in be installed in the browser, and some browsers also have restrictions on the version of the plug-in. If the traditional plug-in is not used, other methods are needed to synchronize the structured information with the video frame. draw.
  • the embodiments of the present disclosure provide a media stream processing method and device, a storage medium, and a program product, which are used to provide a technical solution that can realize the simultaneous drawing of structured information and video frames without installing a plug-in.
  • the technical barrier of simultaneous drawing has high flexibility.
  • An embodiment of the present disclosure provides a media stream processing method, including:
  • the web front end pulls the media stream and obtains the structured information carried in the media stream;
  • the Web front end generates a display time stamp PTS of the structured information according to the frame structure of the media stream, and the display time stamp is aligned with the playback time of the media stream;
  • the Web front end encapsulates the format of the media stream, and uses the H5 player to play the encapsulated media stream;
  • the Web front end synchronously draws the structured information on the current playback screen according to the display time stamp.
  • An embodiment of the present disclosure also provides a media stream processing device, including:
  • An obtaining module used to pull a media stream and obtain structured information carried in the media stream
  • a generating module configured to generate a display time stamp PTS of the structured information according to the frame structure of the media stream, the display time stamp being aligned with the playing time of the media stream;
  • Play module used to format the media stream, and use the H5 player to play the encapsulated media stream;
  • the drawing module is configured to simultaneously draw the structured information on the current playback screen according to the display time stamp.
  • An embodiment of the present disclosure also provides a computer including the above-mentioned media stream processing device.
  • An embodiment of the present disclosure also provides a computer-readable storage medium that stores computer-executable instructions that are configured to perform the media stream processing method described above.
  • An embodiment of the present disclosure also provides a computer program product.
  • the computer program product includes a computer program stored on a computer-readable storage medium.
  • the computer program includes program instructions. When the program instructions are executed by a computer, the The computer executes the media stream processing method described above.
  • An embodiment of the present disclosure also provides an electronic device, including:
  • At least one processor At least one processor
  • a memory communicatively connected to the at least one processor; wherein,
  • the memory stores instructions executable by the at least one processor. When the instructions are executed by the at least one processor, the at least one processor executes the media stream processing method described above.
  • the technical solution provided by the embodiments of the present disclosure pulls the media stream through the Web front end and obtains the structured information of the media stream, and then uses the frame structure of the media stream to generate a display timestamp of the structured information, thereby using the H5 player
  • the aforementioned structured information is drawn synchronously according to the display timestamp.
  • the technical barriers to synchronous drawing cannot be achieved, and it has high flexibility.
  • this implementation takes up little CPU and does not have the problem of consuming CPU. It can achieve multi-channel video playback and avoid stuck problems.
  • FIG. 1 is a schematic flowchart of a media stream processing method according to an embodiment of the present disclosure
  • FIG. 2 is a schematic diagram of an interaction process of a media stream processing method according to an embodiment of the present disclosure
  • FIG. 3 is a schematic flowchart of another media stream processing method according to an embodiment of the present disclosure.
  • FIG. 4 is a schematic flowchart of another media stream processing method according to an embodiment of the present disclosure.
  • FIG. 5 is a schematic structural diagram of a media stream processing device according to an embodiment of the present disclosure.
  • FIG. 6 is a schematic structural diagram of a computer according to an embodiment of the present disclosure.
  • FIG. 7 is a schematic structural diagram of an electronic device provided by an embodiment of the present disclosure.
  • Web (Internet page) front-end It can be embodied as a Web front-end processor.
  • H5 HTML5, which was completed by the World Wide Web Consortium (W3C), and its goal is to replace the HTML4.01 and XHTML 1.0 standards that were formulated earlier, with a view to enabling online Standards meet the needs of contemporary online.
  • W3C World Wide Web Consortium
  • HTML5 in a broad sense, it actually refers to a set of technologies including Hyper Text Markup Language (HTML), Cascading Style Sheets (CSS), and JavaScript (a literal translation script language).
  • HTML5 Hyper Text Markup Language
  • CSS Cascading Style Sheets
  • JavaScript a literal translation script language
  • MSE Media Source Extensions
  • Web API Web API
  • MSE conforms to the W3C standard and allows JavaScript to dynamically build media streams for ⁇ video> and ⁇ audio>. It defines objects that allow JavaScript to transfer media stream fragments to an HTML Media (Element).
  • PTS (Presentation Time) Stamp the display time stamp, which can be used as the basis for the player to play information or media streams. For example, the player can determine when to display the frame corresponding to the display time stamp based on the display time stamp data.
  • RTSP Real Time Streaming Protocol
  • TCP Transmission Control Protocol
  • IP Internet Protocol
  • RTMP Real Time Messaging Protocol
  • Real-time message transmission protocol which is based on TCP, is a protocol family, including Real-Time Messaging Protocol (Real Time Messaging Protocol, RTMP) basic protocol and RTMPT / RTMPS / RTMPE and other variants.
  • RTMP is a network protocol designed for real-time data communication. It is mainly used for audio, video, and data communication between the Flash / AIR (Adobe Integrated Runtime) platform and media streaming / interaction servers that support the RTMP protocol.
  • Software supporting the agreement includes Adobe Media / Server / Ultrant Media / Server / red5, etc.
  • FLV FLASH VIDEO
  • FLV media stream format is a video format developed with the development of Flash MX technology. Due to the small file size and fast loading speed, it makes it possible to watch video files on the Internet. Its appearance effectively solves the problem that after the video file is imported into Flash, the exported SWF (shock wave flash, a kind of design software Flash The special format of the file) is huge in size and cannot be used well on the network.
  • http-flv flv media stream transmitted based on http protocol.
  • websocket-flv flv media stream transmitted based on websocket protocol.
  • NPAPI Netscape Plugin Application Programming Interface
  • Gecko engine browsers such as Netscape Navigator, Mozilla Suite, Mozilla SeaMonkey and Mozilla Firefox
  • webkit engine browsers such as Apple Safari and Google Chrome interface.
  • PPAPI PulpperPluginAPI: used for NPAPI with hidden security risks.
  • the embodiments of the present disclosure provide the following solution: the web front end pulls the media stream and obtains the structured information, and then, by adding a display time stamp to the structured information, the H5 player Synchronously draw structured information when playing media streams to achieve synchronous playback.
  • An embodiment of the present disclosure provides a media stream processing method. Please refer to Figure 1, the method includes:
  • the Web front end pulls the media stream and obtains the structured information carried in the media stream.
  • the Web front end generates a display time stamp PTS of the structured information according to the frame structure of the media stream, and the display time stamp is aligned with the playback time of the media stream.
  • the web front end formats the media stream, and uses the H5 player to play the encapsulated media stream;
  • the Web front end draws the structured information on the current playback screen synchronously according to the display time stamp.
  • the media streams involved in the foregoing S102 and S104 are http-flv streams or websocket-flv streams, where http and websocket are protocol names and flv is the format of the media stream.
  • the format encapsulation described in step S106 essentially converts the format of the media stream, so that the encapsulated media stream can meet the playback requirements of the H5 player.
  • the encapsulated media stream may be in FMP4 format.
  • the streaming media server Before the web front end pulls the data stream, that is, before performing step S102, the streaming media server also needs to push the aforementioned media stream, and the algorithm server also needs to calculate the structured information of the media stream.
  • the method further includes the following steps:
  • the streaming server pulls the RTSP stream of the real-time streaming protocol.
  • the streaming server decodes the RTSP stream to obtain the video frame unit.
  • the streaming media server sends the video frame unit to the algorithm server.
  • the algorithm server processes the video frame unit to obtain the structured information of the RTSP stream.
  • the algorithm server sends the structured information to the streaming server.
  • the streaming media server encapsulates the RTSP stream and the structured information to obtain a media stream.
  • the streaming media server, the algorithm server, and the web front end are integrated together, and the three may be independent of each other, or may be integrated into one device or device in at least two ways.
  • the prior art also relates to an H5 solution that does not rely on plug-ins to achieve media stream playback. Specifically, it transmits a low-encoding-rate stream in MPEG1 encoding format through websocket, and uses a central processing unit (Central Processing Unit, CPU). Soft decode the frame picture and draw it synchronously with canvas.
  • CPU Central Processing Unit
  • the frame image is softly decoded by the CPU, which results in a high occupation of the CPU, which results in a limited number of playback channels and does not support the mainstream h264 encoding scheme, which requires the streaming media server to convert the encoding to MPEG1.
  • the technical solution provided by the embodiments of the present disclosure is that the streaming media server decodes the RTSP stream to obtain the video frame unit, does not need to be decoded by the web front end, and does not occupy the CPU, so there is no There is a problem of CPU consumption performance. Therefore, multi-channel video playback is achieved, and the stuck problem is effectively solved.
  • the RTSP stream and the structured information are encapsulated in S1016, and the result of the encapsulation is to form the aforementioned http-flv stream or websocket-flv stream in the embodiment of the present disclosure.
  • the Web front end can pull the media stream at its push stream address.
  • the embodiment of the present disclosure provides the following implementation manner of S102:
  • the web front end pulls media streams via XHR2 / Fetch or websocket.
  • XHR2 / Fetch or websocket are used as network requests to request binary data from the streaming server to obtain the media stream.
  • the location of the structured information encapsulated in the media stream may be different.
  • the structured information can be encapsulated into the supplemental enhancement information of the http-flv stream (Supplemental enhancement). information, SEI) unit.
  • H.264 is a digital video compression format jointly proposed by the International Organization for Standardization and the International Telecommunication Union.
  • the Web server performs the step of obtaining structured information
  • the Web front-end can obtain the media stream according to the protocol and format of the media stream. Structured information.
  • the protocol-format of the media stream is determined first, so that, according to the correspondence between the preset protocol-format and the packaging location, the packaging location of the purchase information is determined, and then, the structured information is obtained at the packaging location.
  • the structured information is obtained at the packaging location.
  • Plug-ins Existing media stream processing methods are implemented using plug-ins. Whether it is an NPAPI plug-in, a PPAPI plug-in, or an ADOBE FLASH plug-in, you need to decode the frame picture after pulling the media stream, and use frame synchronization to draw structured information. This not only requires The browser installs the plug-in, which decodes the frame picture, which further leads to an increase in the amount of calculation and a decrease in processing efficiency.
  • step S104 may be:
  • the web front end parses out the SEI unit of the structured data and the video frame unit of the media stream according to the frame structure of the media stream.
  • the Web front end generates a display timestamp for the SEI unit according to the playing time of the video frame unit, so that the SEI unit is aligned with the video frame unit.
  • the final presentation result is that the media stream and the structured information are played synchronously. Therefore, the display time stamp of the SEI unit is required to be aligned with the playback time of the video frame unit.
  • the SEI unit when generating the display time stamp of the SEI unit, the SEI unit can be generated at the interval of 40ms for each SEI unit.
  • the display timestamp of the playback time of the video frame unit corresponding to the SEI unit is consistent.
  • the embodiment of the present disclosure uses the H5 player to play the media stream, and at the same time, according to the display timestamp generated above, draws the structured information above the current playback screen to achieve synchronous playback.
  • the canvas is a browser DOM (document object model document object model) object, which presents the picture
  • the overlay is displayed on the current playback screen. That is, the picture displayed on the canvas is closer to the viewer than the picture played in the H5 player.
  • the two-dimensional image can be realized by canvas.
  • Canvas is a 2D (two-dimensional) drawing protocol, this drawing protocol is rendered pixel by pixel, and 2D image drawing is achieved through JavaScript. Therefore, in the aforementioned process, if the synchronous drawing of structured information is achieved through canvas, the canvas element can be added to the H5 player, so that the canvas can draw 2D images on the canvas through JavaScript.
  • the three-dimensional image can be drawn through the Web GL (Web Graphics Library) protocol.
  • Web GL is a 3D (three-dimensional) drawing protocol. This drawing protocol eliminates the trouble of developing a dedicated rendering plug-in for web pages. It can be used to create website pages with complex 3D structures and can even be used to design 3D web games Wait.
  • the Web front end can preset the frequency to retrieve the current time of the media stream, and then, based on the display timestamp, perform synchronous drawing of the structured information on the canvas and overlay and align the current playback screen.
  • the preset frequency can be set as needed, for example, it can be set to call the time at a frequency of 60 frames per second.
  • an embodiment of the present disclosure also provides a possible design as shown in FIG. 4 to implement the drawing structure.
  • the rectification process of the customized information ensures that it is drawn synchronously with the media stream.
  • the method further includes:
  • the Web front end performs correction processing on the drawing of the structured information according to the first frequency.
  • the first frequency is greater than the second frequency, and the second frequency is the frame playback frequency of the media stream.
  • the second frequency is the frame playback frequency of the media stream
  • the time interval is the frame interval of the media stream, which is related to the design of the frame structure of the media stream.
  • the first frequency is greater than the second frequency
  • the time interval of the first frequency is less than the time interval of the first frequency, that is, less than the frame interval of the media stream. That is, correcting the drawing of the structured information at a higher frequency, so that the played media stream and the structured information can be presented synchronously.
  • a time interval slightly larger than the specific operation time can be used for the correction process.
  • the correction process can be achieved through the MATH.ceil function.
  • the MATH.ceil function is a function of the lua function (lua function is a function in JavaScript), which is composed of: MATH.ceil (x) returns the smallest integer greater than or equal to the parameter x, that is, rounds up the floating point number. In the implementation scenario involved in the embodiment of the present disclosure, it can be expressed as: MATH.ceil (video.currentTime / 40) * 40 is aligned with PTS, where video.currentTime represents the current playing time of the media stream.
  • the frame playback interval of the media stream is 40 ms
  • 10 ms per frame may be used as the first frequency for the correction process.
  • the technical solution provided by the embodiments of the present disclosure does not need to install a plug-in in the browser, which can be adapted to the future development needs of browsers, and realizes synchronous drawing by displaying time stamps without the need of media streaming by the web front end Decode frame pictures, which can effectively reduce the amount of calculation, help shorten the processing time, and reserve more time for correction processing to ensure the synchronized playback and alignment of structured information and media streams.
  • the media stream processing device 500 includes:
  • the obtaining module 51 is used to pull the media stream and obtain the structured information carried in the media stream;
  • the generating module 52 is used to generate a display time stamp PTS of structured information according to the frame structure of the media stream, and the display time stamp is aligned with the playing time of the media stream;
  • the playback module 53 is used to format the media stream, and use the H5 player to play the encapsulated media stream;
  • the drawing module 54 is used to simultaneously draw structured information on the current playback screen according to the display time stamp.
  • the generating module 52 is specifically used for:
  • the SEI unit of the structured data and the video frame unit of the media stream are parsed
  • a display timestamp is generated for the SEI unit, so that the SEI unit is aligned with the video frame unit.
  • the media stream processing device further includes:
  • An error correction module (not shown in FIG. 5) is used to perform error correction processing on the drawing of the structured information according to the first frequency.
  • the first frequency is greater than the second frequency, and the second frequency is the frame playback frequency of the media stream.
  • drawing module 54 is specifically used for:
  • the display time stamp draw a three-dimensional image or a two-dimensional image on the canvas, where the canvas is displayed overlaid on the current playback screen.
  • the obtaining module 51 is specifically used for:
  • the media stream is: http-flv media stream or websocket-flv media stream.
  • the obtaining module 51 is specifically used for:
  • the media stream processing device 500 shown in FIG. 5 is provided at the front end of the Web.
  • an embodiment of the present disclosure also provides a computer. Please refer to FIG. 6.
  • the computer 600 includes the media stream processing device 500 described above.
  • Embodiments of the present disclosure also provide a computer-readable storage medium that stores computer-executable instructions that are configured to perform the media stream processing method described above.
  • An embodiment of the present disclosure also provides a computer program product.
  • the computer program product includes a computer program stored on a computer-readable storage medium.
  • the computer program includes program instructions. When the program instructions are executed by a computer, the The computer executes the above media stream processing method.
  • the aforementioned computer-readable storage medium may be a transient computer-readable storage medium or a non-transitory computer-readable storage medium.
  • An embodiment of the present disclosure also provides an electronic device, whose structure is shown in FIG. 7, the electronic device includes:
  • At least one processor (processor) 73 one processor 73 is taken as an example in FIG. 7; and the memory (memory) 71 may further include a communication interface (Communication Interface) 72 and a bus. Among them, the processor 73, the communication interface 72, and the memory 71 can complete communication with each other through the bus.
  • the communication interface 72 can be used for information transmission.
  • the processor 73 may call logical instructions in the memory 71 to execute the media stream processing method of the above embodiment.
  • logic instructions in the memory 71 described above can be implemented in the form of software functional units and sold or used as independent products, and can be stored in a computer-readable storage medium.
  • the memory 71 as a computer-readable storage medium may be used to store software programs and computer-executable programs, such as program instructions / modules corresponding to the methods in the embodiments of the present disclosure.
  • the processor 73 executes functional applications and media streams by running software programs, instructions, and modules stored in the memory 71, that is, implementing the media stream processing method in the foregoing method embodiments.
  • the memory 71 may include a storage program area and a storage data area, where the storage program area may store an operating system and application programs required for at least one function; the storage data area may store data created according to the use of a terminal device, and the like.
  • the memory 71 may include a high-speed random access memory, and may also include a non-volatile memory.
  • the technical solutions of the embodiments of the present disclosure may be embodied in the form of software products, which are stored in a storage medium and include one or more instructions to make a computer device (which may be a personal computer, server, or network) Equipment, etc.) to perform all or part of the steps of the method described in the embodiments of the present disclosure.
  • the aforementioned storage medium may be a non-transitory storage medium, including: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or optical disk, etc.
  • a medium that can store program codes may also be a transient storage medium.
  • first, second, etc. may be used in this application to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another.
  • the first element can be called the second element, and likewise, the second element can be called the first element, as long as all occurrences of the "first element” are consistently renamed and all occurrences of The “second component” can be renamed consistently.
  • the first element and the second element are both elements, but they may not be the same element.
  • the various aspects, implementations, implementations, or features in the described embodiments can be used alone or in any combination.
  • Various aspects in the described embodiments may be implemented by software, hardware, or a combination of software and hardware.
  • the described embodiments may also be embodied by a computer-readable medium that stores computer-readable code including instructions executable by at least one computing device.
  • the computer-readable medium can be associated with any data storage device capable of storing data, which can be read by a computer system.
  • Computer-readable media used for examples may include read-only memory, random access memory, CD-ROM, HDD, DVD, magnetic tape, optical data storage devices, and the like.
  • the computer-readable medium may also be distributed in computer systems connected through a network, so that computer-readable codes can be stored and executed in a distributed manner.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Information Transfer Between Computers (AREA)

Abstract

L'invention concerne un procédé et un appareil de traitement de flux multimédia, un support de stockage, et un produit programme. Le procédé comporte les étapes suivantes : Un frontal web Internet extrait un flux multimédia et obtient des informations structurées portées dans le flux multimédia (S102); ensuite, le frontal web Internet génère une estampille temporelle d'affichage des informations structurées selon la structure de trame du flux multimédia, l'estampille temporelle d'affichage étant alignée avec le point temporel de lecture du flux multimédia (S104); puis, le frontal web Internet encapsule le flux multimédia dans un format, et lit le flux multimédia encapsulé à l'aide d'un lecteur H5 (S106); en outre, le frontal web Internet dessine de manière synchrone les informations structurées sur l'image de lecture courante selon l'estampille temporelle d'affichage (S108). Le procédé fournit une solution technique pour un dessin synchrone d'informations structurées et de trames vidéo sans installer un module d'extension, élimine la barrière technique selon laquelle un dessin synchrone ne peut pas être mis en oeuvre sans extension, et a une flexibilité élevée.
PCT/CN2018/115660 2018-11-15 2018-11-15 Procédé et appareil de traitement de flux multimédia, support de stockage, et produit programme WO2020097857A1 (fr)

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PCT/CN2018/115660 WO2020097857A1 (fr) 2018-11-15 2018-11-15 Procédé et appareil de traitement de flux multimédia, support de stockage, et produit programme

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CN114697303A (zh) * 2022-03-16 2022-07-01 北京金山云网络技术有限公司 一种多媒体数据处理方法、装置、电子设备及存储介质
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CN114745361A (zh) * 2022-03-25 2022-07-12 朗新数据科技有限公司 一种用于html5浏览器的音视频播放方法及系统
CN114745361B (zh) * 2022-03-25 2024-05-14 朗新数据科技有限公司 一种用于html5浏览器的音视频播放方法及系统
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