WO2019062514A1 - 实现视频信息预览的方法、装置及客户端和存储介质 - Google Patents

实现视频信息预览的方法、装置及客户端和存储介质 Download PDF

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Publication number
WO2019062514A1
WO2019062514A1 PCT/CN2018/104412 CN2018104412W WO2019062514A1 WO 2019062514 A1 WO2019062514 A1 WO 2019062514A1 CN 2018104412 W CN2018104412 W CN 2018104412W WO 2019062514 A1 WO2019062514 A1 WO 2019062514A1
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WIPO (PCT)
Prior art keywords
poster
information
file
index
preview
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PCT/CN2018/104412
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English (en)
French (fr)
Inventor
朱兴昌
曹珈
梁国柱
孔建华
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中兴通讯股份有限公司
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Application filed by 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Priority to EP18860416.9A priority Critical patent/EP3691282A4/en
Priority to US16/626,333 priority patent/US11540020B2/en
Publication of WO2019062514A1 publication Critical patent/WO2019062514A1/zh

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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 or manipulating encoded video stream scene graphs
    • H04N21/2343—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements
    • H04N21/234363—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements by altering the spatial resolution, e.g. for clients with a lower screen resolution
    • 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
    • H04N21/431—Generation of visual interfaces for content selection or interaction; Content or additional data rendering
    • H04N21/4312—Generation of visual interfaces for content selection or interaction; Content or additional data rendering involving specific graphical features, e.g. screen layout, special fonts or colors, blinking icons, highlights or animations
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/47—End-user applications
    • H04N21/472—End-user interface for requesting content, additional data or services; End-user interface for interacting with content, e.g. for content reservation or setting reminders, for requesting event notification, for manipulating displayed content
    • H04N21/47202—End-user interface for requesting content, additional data or services; End-user interface for interacting with content, e.g. for content reservation or setting reminders, for requesting event notification, for manipulating displayed content for requesting content on demand, e.g. video on demand
    • 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 or manipulating encoded video stream scene graphs
    • H04N21/2343—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements
    • H04N21/23439—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements for generating different versions
    • 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
    • H04N21/431—Generation of visual interfaces for content selection or interaction; Content or additional data rendering
    • H04N21/4312—Generation of visual interfaces for content selection or interaction; Content or additional data rendering involving specific graphical features, e.g. screen layout, special fonts or colors, blinking icons, highlights or animations
    • H04N21/4316—Generation of visual interfaces for content selection or interaction; Content or additional data rendering involving specific graphical features, e.g. screen layout, special fonts or colors, blinking icons, highlights or animations for displaying supplemental content in a region of the screen, e.g. an advertisement in a separate window
    • 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
    • H04N21/435—Processing of additional data, e.g. decrypting of additional data, reconstructing software from modules extracted from the transport stream
    • 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
    • H04N21/442—Monitoring of processes or resources, e.g. detecting the failure of a recording device, monitoring the downstream bandwidth, the number of times a movie has been viewed, the storage space available from the internal hard disk
    • H04N21/44213—Monitoring of end-user related data
    • H04N21/44218—Detecting physical presence or behaviour of the user, e.g. using sensors to detect if the user is leaving the room or changes his face expression during a TV program
    • 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
    • H04N21/45—Management operations performed by the client for facilitating the reception of or the interaction with the content or administrating data related to the end-user or to the client device itself, e.g. learning user preferences for recommending movies, resolving scheduling conflicts
    • H04N21/462—Content or additional data management, e.g. creating a master electronic program guide from data received from the Internet and a Head-end, controlling the complexity of a video stream by scaling the resolution or bit-rate based on the client capabilities
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/47—End-user applications
    • H04N21/472—End-user interface for requesting content, additional data or services; End-user interface for interacting with content, e.g. for content reservation or setting reminders, for requesting event notification, for manipulating displayed content
    • H04N21/47217—End-user interface for requesting content, additional data or services; End-user interface for interacting with content, e.g. for content reservation or setting reminders, for requesting event notification, for manipulating displayed content for controlling playback functions for recorded or on-demand content, e.g. using progress bars, mode or play-point indicators or bookmarks
    • 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]
    • H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
    • H04N21/83—Generation or processing of protective or descriptive data associated with content; Content structuring
    • H04N21/845—Structuring of content, e.g. decomposing content into time segments
    • H04N21/8456—Structuring of content, e.g. decomposing content into time segments by decomposing the content in the time domain, e.g. in time segments

Definitions

  • the present disclosure relates to, but is not limited to, the field of multimedia technologies, and in particular, to a method, an apparatus, and a client and a storage medium for implementing video information preview.
  • OTT Over-The-Top
  • DVB digital video broadcasting
  • IPTV Internet Protocol Television
  • the OTT service is an abbreviation of the Over-the-Top service, which usually means that the content or service is built on the basic telecommunication service and does not require additional support from the network operator.
  • the user can drag and drop the progress of the video by dragging the progress bar.
  • the user can understand the video scene of the drag point by previewing the poster during the dragging process.
  • the video is switched to play where you are interested.
  • OTT services have implemented similar functions, but they are implemented through the application (APP) client and the content delivery network (CDN).
  • APP application
  • CDN content delivery network
  • the client follows the client.
  • the video stream is pulled from the CDN until the picture corresponding to the first I frame is solved from the code stream and displayed to the user to realize preview of the video poster.
  • the encoder uses the thumbnails function to extract posters from the content.
  • the posters are named according to the fragmentation rules or form a large poster.
  • the client locates the corresponding clip according to the currently played fragment when dragging the progress bar. Posters, then download posters from CDN for presentation to preview the video posters.
  • Thumbnails represents the situation thumbnail function, which is the industry standard term for encoders.
  • the client and the CDN are closely coordinated, and it needs to be implemented by the client's player.
  • the drag control of the progress bar is implemented by the APP client page. Therefore, to implement the drag preview poster, the player must provide a private interface to the page, so that the client can obtain the slice and location currently played by the program. Since the player is generally a third-party commercial player or a system native player, such an implementation may cause difficulty in promoting the business; in addition, the current solution can only provide one size preview poster, and cannot accommodate multiple clients. The need for different sizes of pages to display.
  • the embodiments of the present disclosure provide a method, an apparatus, a client, and a storage medium for implementing video information preview, which can be independently implemented on a client end, and facilitate the promotion of services.
  • a method for implementing video information preview including:
  • the corresponding preview information is located from the description file according to the dragged position information, where the description file is used to describe the preview information;
  • the description file of the video played down from the server when the video is played, the description file of the video played down from the server;
  • the description file of the video played back from the server is detected when the progress bar is dragged.
  • the size of the thumbnail of the preview information includes one or more types.
  • the preview information index file includes one or more index files, wherein the one or more index files are used to describe primary index information and sub-index information.
  • the preview information includes a poster;
  • the preview information index file includes a poster main index file, a sub-index description file;
  • the sub-index description file is a sub-description index file corresponding to different resolutions in the poster main index file;
  • the thumbnail image is a thumbnail fragment of different time points corresponding to the resolution.
  • the method further includes: when the program is played, downloading the poster main index file of the program, and finding the sub-index description file that matches the client display from the poster main index file;
  • the locating the corresponding preview information from the description file according to the dragged location information includes:
  • a client including a processing module, a display module, and a storage module;
  • a storage module configured to store a description file, where the description file is used to describe the preview information
  • a processing module configured to: when the drag progress bar is detected, locate corresponding preview information from the description file according to the dragged position information;
  • a display module that displays the preview information that is targeted.
  • the client further includes: a pull-down module, configured to pull down the description file of the video played from a server when playing a video;
  • the preview information index file includes one or more index files, wherein the one or more index files are used to describe primary index information and sub-index information.
  • the preview information includes a poster;
  • the preview information index file corresponding to the preview information includes a poster main index file and a sub-index description file, and the processing module is configured to:
  • the poster main index file of the program is downloaded, and the sub-index description file matching the client display is found from the main index file of the poster;
  • the corresponding poster file name is parsed from the sub-index description file matching the client display according to the dragged position information, and the corresponding corresponding in the poster is downloaded according to the parsed poster file name. Size poster thumbnail.
  • a computer readable storage medium storing computer executable instructions for performing the method of implementing video information preview described above is stored.
  • an apparatus for implementing preview of video information comprising a processor, a memory, and a computer program stored on the memory and operable on the processor: when a drag progress bar is detected, Corresponding preview information is located from the description file according to the dragged position information, wherein the description file is used to describe the preview information; and the located preview information is displayed.
  • the corresponding preview information is located from the description file according to the dragged position information, where the description file is used to describe the preview information; Preview information.
  • the video information preview is independently completed on the client side, without the participation of the player and the CDN, which is beneficial to the promotion of the business.
  • some embodiments of the present disclosure satisfy the display needs of various clients by defining thumbnails of video preview information of different sizes.
  • FIG. 1 is a flowchart of a method for implementing video information preview in an embodiment of the present disclosure
  • FIG. 2 is a schematic structural diagram of a client in an embodiment of the present disclosure
  • FIG. 3 is a schematic diagram of a first embodiment of an architecture for implementing video information preview according to the present disclosure
  • FIG. 4 is a schematic flow chart of a first embodiment of a method for implementing video information preview according to the present disclosure
  • FIG. 5 is a schematic diagram of a second embodiment of an architecture for implementing video information preview according to the present disclosure
  • FIG. 6 is a schematic flowchart diagram of a second embodiment of a method for implementing video information preview according to the present disclosure
  • FIG. 7 is a schematic flowchart diagram of a third embodiment of a method for implementing video information preview according to the present disclosure.
  • FIG. 1 is a flowchart of a method for implementing video information preview according to an embodiment of the present disclosure. As shown in FIG. 1 , the method includes the following steps:
  • Step 100 When the drag progress bar is detected, the corresponding preview information is located from the description file according to the dragged position information, where the description file is used to describe the preview information.
  • the client can also pull down the description file of the video that is played back from the server to describe the preview information when the drag progress bar is detected.
  • the method further includes: describing the preview information by using a description file.
  • the content including the live stream
  • the content is injected into the CDN
  • Seconds) extracting preview information as an exemplary embodiment, in order to improve efficiency, the preview information is preferably extracted according to a key frame (I frame) position; the time stamp of the extracted preview information is recorded; and then, according to the extracted preview information, A cross-platform computer vision library (Opencv, Open Source Computer Vision Library) generates thumbnails of preview information.
  • FFmpeg is a free software that can run video, conversion and streaming functions in multiple formats of audio and video.
  • the preview information itself, the content unique identifier (CID) (storage external CID), time information such as the correspondence between the time stamp and the thumbnail are saved in the database, and a preview information index file of the program is generated.
  • CID content unique identifier
  • time information such as the correspondence between
  • the size of the thumbnail of the preview information may be a fixed one.
  • the size of the thumbnail of the preview information may also be a thumbnail of a plurality of sizes generated according to needs, and the thumbnails of different sizes correspond to virtual slice files of thumbnail data of different resolutions.
  • Some embodiments of the present disclosure satisfy the display needs of various clients by defining video preview information of different sizes.
  • the preview information may include a poster.
  • the preview information index file includes one or more index files, wherein the one or more index files are used to describe primary index information and sub-index information.
  • the preview information index file may include a poster main index file and a sub index description file.
  • main.zti is the main index file of the poster
  • other *.zti is the sub-description index file corresponding to different resolutions in the main index file main.zti
  • the *.ztd file is the corresponding time of the corresponding resolution.
  • the thumbnail slice of the point is the virtual slice file of the thumbnail data.
  • the index file may be described in a text format, and an example of the poster main index file is shown in Table 2:
  • the poster main index file shown in Table 2 includes two sub-description index files shown in Table 1, wherein the sub-description index file poster-1.zti gives a resolution of the picture or image of 160*120; The sub-description index file poster-2.zti gives the resolution of the picture or image as 1280*720.
  • the uniform resource locator (URL, Uniform Resoure Locator) of each segment fragment is the URL given by the SegmentTemplate, and the $range is replaced by the range parameter value (byte range) of the corresponding Segment in the SegmentList.
  • different thumbnails correspond to different time points under the sub-description index file.
  • the method may further include:
  • the poster main index file of the program is first downloaded, and the sub-index description file matching the client display resolution as the client display resolution requirement is found from the poster main index file; accordingly,
  • the step 100 specifically includes: when the preview poster needs to be displayed, for example, when the drag progress bar is detected, according to the position information of the preview, that is, the position information of the drag, the matching with the client display meets the requirements of the client display resolution.
  • the corresponding poster file name is parsed in the sub-index description file, and the poster thumbnail of the corresponding size in the poster is downloaded according to the parsed poster file name.
  • Step 101 Display the preview information that is located.
  • the video information preview is independently completed on the client side, without the participation of the player and the CDN, which is beneficial to the promotion of the service.
  • the embodiment of the present disclosure further provides a computer readable storage medium storing computer executable instructions for performing the method of implementing video information preview described in the above embodiments or exemplary embodiments.
  • the client includes at least a processing module, a display module, and a storage module.
  • a storage module configured to store a description file, where the description file is used to describe the preview information
  • a processing module configured to: when the drag progress bar is detected, locate corresponding preview information from the description file according to the dragged position information;
  • a display module that displays the preview information that is targeted.
  • the client of the embodiment of the present disclosure further includes: a pull-down module, configured to pull down the description file of the played video from the server when the video is played;
  • the preview server side includes at least a generation module for describing the preview information using the description file.
  • the preview information index file includes one or more index files, wherein the one or more index files are used to describe primary index information and sub-index information.
  • the preview information index file may include a poster main index file and a sub-index description file, and the processing module is configured to:
  • the poster main index file of the program is downloaded, and the sub-index description file matching the client display resolution is matched from the main index file of the poster;
  • a preview poster When a preview poster needs to be displayed, such as when a drag progress bar is detected, according to the position information of the preview, that is, the position information of the drag, from the sub-index description file that matches the client display resolution, such as meeting the client display resolution requirement.
  • the corresponding poster file name is parsed, and the poster thumbnail of the corresponding size in the poster is downloaded according to the parsed poster file name.
  • An embodiment of the present disclosure further provides an apparatus for previewing video information, including a processor, a memory, and a computer program stored on the memory and operable on the processor: when the drag progress bar is detected, according to the position of the drag The information locates corresponding preview information from the description file, wherein the description file is used to describe the preview information; and the located preview information is displayed.
  • the first embodiment is a VOD dragging poster.
  • FIG. 3 is a schematic diagram of a first embodiment of an architecture for implementing video information preview. As shown in FIG. 3, in the first embodiment, a video is notified through a content injection interface.
  • the device for information preview has new content injection, and the device for previewing the video information pulls down the newly-launched VOD program from the library, and extracts the poster and generates the poster thumbnail from the program according to a preset time interval such as 10s.
  • FIG. 4 is a schematic flowchart of a first embodiment of a method for implementing video information preview according to the present disclosure. As shown in FIG. 4, a method for implementing a poster preview when a client plays a VOD includes:
  • Step 400 The user plays the VOD program on the client and plays successfully.
  • Step 401 The client requests to download a poster main index file corresponding to the currently played VOD program.
  • the edge cache (Cache) node determines whether the poster main index file corresponding to the currently played VOD program is cached locally, and if not, directly returns the HTTP download from the device that implements the video information preview. It should be noted that the edge Cache node may be omitted.
  • Step 403 The client parses the downloaded poster main index file, and searches for a sub-description index file corresponding to the poster thumbnail of the size most suitable for the client according to the description in the poster main index file.
  • the resolution of the picture or image is given in the main index file of the poster. Therefore, according to the resolution, a sub-description index file corresponding to the poster thumbnail of the size most suitable for the client can be found.
  • Step 404 The client requests to download the corresponding sub-description index file.
  • the edge Cache node determines whether the corresponding sub-description index file obtained in step 403 is cached locally, and if not, directly returns the hypertext transfer protocol from the device that implements the video information preview (HTTP, HyperText). Transfer Protocol) download.
  • HTTP HyperText
  • Transfer Protocol HyperText
  • Step 406 to step 407 If it is detected that the user performs a VOD drag operation, the downloaded sub-description index file is parsed, and the corresponding poster thumbnail file is located according to the dragged position.
  • the uniform resource locator (URL, Uniform Resoure Locator) of each segment fragment is the URL given by the SegmentTemplate, and The $range is replaced by the range parameter value (byte range) of the corresponding Segment in the SegmentList.
  • different thumbnails correspond to different time points under the sub-description index file.
  • Step 408 Request to download the corresponding poster thumbnail file.
  • the edge Cache node determines whether a corresponding poster thumbnail file is cached locally, and if not, directly returns the HTTP download from the device that implements the video information preview.
  • Step 410 Display the thumbnail of the downloaded poster.
  • FIG. 5 is a schematic diagram of a second embodiment of an architecture for implementing video information preview.
  • the device for implementing video information preview is from a central node of IPTV&OTT.
  • Receive channel code stream such as Real Time Streaming Protocol (RTSP) or Real-time Transport Protocol (RTP), unicast, Internet Group Management Protocol (IGMP) multicast, HTTP Live stream (HLS, HTTP Live Streaming) unicast, dynamic adaptive streaming (DASH) unicast, etc.
  • RTSP Real Time Streaming Protocol
  • RTP Real-time Transport Protocol
  • IGMP Internet Group Management Protocol
  • HLS HTTP Live stream
  • HTTP Live Streaming unicast
  • DASH dynamic adaptive streaming
  • FIG. 6 is a schematic flowchart of a second embodiment of a method for previewing video information according to the present disclosure. As shown in FIG. 6 , the method for previewing a poster of a client live broadcast time shift includes:
  • Step 600 The user switches the channel on the client and plays successfully.
  • Step 601 The client requests to download a poster main index file of the currently playing channel.
  • the edge Cache node determines whether the poster main index file corresponding to the current playing channel is cached locally, and if not, directly returns the HTTP download from the device that implements the video information preview. It should be noted that the edge Cache node may be omitted.
  • Step 603 The client parses the downloaded poster main index file, and searches for a sub-description index file corresponding to the poster thumbnail of the size most suitable for the client according to the description in the poster main index file.
  • Step 604 When the user cuts in the channel time shifting station, the client requests to download the corresponding sub-description index file, and carries the time-shift range parameter in the request.
  • the edge Cache node determines whether the corresponding sub-description index file obtained in step 604 is cached locally, and if not, directly returns the HTTP download from the device that implements the video information preview.
  • Step 606 It is detected that the user performs a time shifting operation.
  • Step 607 Parse the downloaded sub-description index file, and locate the corresponding poster thumbnail file according to the dragged position.
  • Step 608 Request to download the corresponding poster thumbnail file.
  • the edge Cache node determines whether a corresponding poster thumbnail file is cached locally, and if not, directly returns the HTTP download from the device that implements the video information preview.
  • Step 610 Display the thumbnail of the downloaded poster.
  • FIG. 7 is a schematic flowchart of a third embodiment of a method for implementing video information preview according to the present disclosure. As shown in FIG. 7, a method for implementing a poster preview when a client plays a TVOD includes:
  • Step 700 The user plays the TVOD program on the client and plays successfully.
  • Step 701 The client requests to download a poster main index file corresponding to the channel of the currently played TVOD program.
  • the edge cache (Cache) node determines whether the poster main index file corresponding to the channel of the currently played TVOD program is cached locally, and if not, directly returns the HTTP download from the device that implements the video information preview. It should be noted that the edge Cache node may be omitted.
  • Step 703 The client parses the downloaded poster main index file, and searches for a sub-description index file corresponding to the poster thumbnail of the size most suitable for the client according to the description in the poster main index file. At the same time, the start time and end time of the TVOD are obtained.
  • Step 704 The client requests to download a corresponding sub-description index file, where the request carries the start time and end time obtained in step 703.
  • the edge Cache node determines whether the corresponding sub-description index file obtained in step 703 is cached locally, and if not, directly returns the hypertext transfer protocol from the device that implements the video information preview (HTTP, HyperText). Transfer Protocol) download.
  • HTTP HyperText
  • Transfer Protocol HyperText
  • Step 706 to step 707 If it is detected that the user performs a TVOD drag operation, parsing the downloaded sub-description index file, and positioning the corresponding poster thumbnail file according to the dragged position.
  • Step 708 Request to download the corresponding poster thumbnail file.
  • the edge Cache node determines whether the corresponding poster thumbnail file is cached locally, and if not, directly returns the HTTP download from the device that implements the video information preview.
  • Step 710 Display the thumbnail of the downloaded poster.
  • modules or steps of the present disclosure described above can be implemented by a general-purpose computing device that can be centralized on a single computing device or distributed across a network of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein.
  • the steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps thereof are fabricated as a single integrated circuit module. As such, the disclosure is not limited to any specific combination of hardware and software.
  • the corresponding preview information is located from the description file according to the dragged position information, where the description file is used to describe the preview information; Preview information.
  • the video information preview is realized independently on the client side, without the participation of the player and the CDN, which is beneficial to the promotion of the business and has good industrial applicability.

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Abstract

本公开提供了一种实现视频信息预览的方法、装置及客户端和存储介质。该实现视频信息预览的方法包括：当检测到拖动进度条时，根据拖动的位置信息从描述文件中定位出对应的预览信息，其中，描述文件用于描述预览信息；展示定位出的预览信息。通过本公开实施例，实现了视频信息预览在客户端的独立完成，而不需要播放器和CDN的参与，利于业务的推广。

Description

实现视频信息预览的方法、装置及客户端和存储介质 技术领域
本公开涉及但不限于多媒体技术领域，尤其涉及一种实现视频信息预览的方法、装置及客户端和存储介质。
背景技术
随着移动互联网的快速发展，Over-The-Top(OTT)业务发展很迅速，传统的数字视频广播(DVB)以及网络协议电视(IPTV，Internet Protocol Television)也逐步向纯OTT业务演进。其中，OTT业务是Over-the-Top业务的缩写，通常指内容或服务建构在基础电信服务之上从而不需要网络运营商额外的支持。在用户观看视频时，用户可以通过拖动进度条的方式实现视频的拖动播放，为了提高用户的体验，在拖动过程中通过预览海报的方式可以让用户了解拖动点的视频场景，将视频切换到自己感兴趣的位置播放。
当前很多OTT业务已经实现了类似的功能，但是都是通过应用(APP)客户端和内容分发网络(CDN，Content Delivery Network)的私有方式实现，比如：当用户拖动进度条时，客户端按照拖动所在的时间点从CDN拉视频码流，直到从码流中解出第一个I帧对应的图片并展示给用户，以实现视频海报的预览。再如：在制作内容时，编码器利用thumbnails功能，从内容中抽取海报，海报按照分片规则命名或者形成一个超大海报，客户端在拖动进度条时根据当前播放的分片定位出对应的海报，然后从CDN下载海报进行展示以实现视频海报的预览。其中，Thumbnails表示局势缩略图功能，是编码器的行业标准用语。
相关技术中，无论哪种实现方案，都存在客户端和CDN紧密配合的问题，而且需要通过客户端的播放器来实现。而进度条的拖动控制是APP客户端页面实现的，因此，要实现拖动预览海报，播放器必须给页面提供私有的接口，让客户端能够获得节目当前播放的分片和位置。由于播放器 一般是第三方商业播放器或系统原生播放器，这样的实现方式会导致业务的推广很困难；另外，当前的解决方案只能提供一种尺寸的预览海报，不能适应多种客户端页面不同尺寸展示的需要。
公开内容
为了解决上述技术问题，本公开实施例提供了一种实现视频信息预览的方法、装置及客户端和存储介质，能够在客户端独立实现，利于业务的推广。
根据本公开的一个实施例，提供了一种实现视频信息预览的方法，包括：
当检测到拖动进度条时，根据拖动的位置信息从描述文件中定位出对应的预览信息，其中，描述文件用于描述预览信息；
展示定位出的预览信息。
作为一种示例性实施例，当播放视频时，从服务器下拉播放的所述视频的所述描述文件；
或者，当检测到拖动所述进度条时，从服务器下拉播放的视频的所述描述文件。
作为一种示例性实施例，所述预览信息的缩略图的尺寸包括一种或一种以上。
作为一种示例性实施例，所述预览信息索引文件包括一个或多个索引文件，其中，所述一个或多个索引文件用于描述主索引信息和子索引信息。
作为一种示例性实施例，所述预览信息包括海报；所述预览信息索引文件包括海报主索引文件、子索引描述文件；
其中，子索引描述文件为海报主索引文件中对应不同分辨率的子描述索引文件；所述缩略图为对应分辨率的不同时间点的缩略图分片。
作为一种示例性实施例，所述方法还包括：播放节目时，下载节目的所述海报主索引文件，从海报主索引文件中找到和客户端展示匹配的所述 子索引描述文件；
所述根据拖动的位置信息从描述文件中定位出对应的预览信息包括：
根据所述拖动的位置信息，从与该客户端展示匹配的子索引描述文件中解析出对应的海报文件名；
根据解析出的海报文件名下载该海报中对应尺寸的海报缩略图。
根据本公开的另一个实施例，还提供了一种客户端，包括处理模块、展示模块、存储模块；其中，
存储模块，用于存储描述文件，其中，描述文件用于描述预览信息；
处理模块，用于在检测到拖动进度条时，根据拖动的位置信息从描述文件中定位出对应的预览信息；
展示模块，用于展示定位出的预览信息。
作为一种示例性实施例，所述客户端还包括：下拉模块，用于当播放视频时，从服务器下拉播放的所述视频的所述描述文件；
或者，用于当检测到拖动所述进度条时，从服务器下拉播放的视频的所述描述文件。
作为一种示例性实施例，所述预览信息索引文件包括一个或多个索引文件，其中，所述一个或多个索引文件用于描述主索引信息和子索引信息。
作为一种示例性实施例，所述预览信息包括海报；所述预览信息对应的预览信息索引文件包括海报主索引文件、子索引描述文件，所述处理模块用于：
处理模块自身所在客户端播放节目时，下载节目的海报主索引文件，从海报主索引文件中找到和客户端展示匹配的子索引描述文件；
当需要展示预览海报时，根据所述拖动的位置信息，从与该客户端展示匹配的子索引描述文件中解析出对应的海报文件名，并根据解析出的海报文件名下载该海报中对应尺寸的海报缩略图。
根据本公开的再一个实施例，提供了一种计算机可读存储介质，存储 有计算机可执行指令，所述计算机可执行指令用于执行上述的实现视频信息预览的方法。
根据本公开的再一个实施例，还提供了一种实现视频信息预览的装置，包括处理器、存储器以及存储在存储器上可在处理器上运行的计算机程序：当检测到拖动进度条时，根据拖动的位置信息从描述文件中定位出对应的预览信息，其中，描述文件用于描述预览信息；展示定位出的预览信息。
根据本公开的实施例中所述的方案，当检测到拖动进度条时，根据拖动的位置信息从描述文件中定位出对应的预览信息，其中，描述文件用于描述预览信息；展示定位出的预览信息。通过该方案，实现了视频信息预览在客户端的独立完成，而不需要播放器和CDN的参与，利于业务的推广。
进一步地，本公开的部分实施例通过定义不同尺寸的视频预览信息的缩略图，满足了各种客户端的展示需要。
本公开实施例的其它特征和优点将在随后的说明书中阐述，并且，部分地从说明书中变得显而易见，或者通过实施本公开的实施例而了解。本公开实施例的目的和其他优点可通过在说明书、权利要求书以及附图中所特别指出的结构来实现和获得。
附图说明
附图用来提供对本公开技术方案的进一步理解，并且构成说明书的一部分，与本公开的实施例一起用于解释本公开的技术方案，并不构成对本公开技术方案的限制。
图1为本公开实施例中实现视频信息预览的方法的流程图；
图2为本公开实施例中客户端的组成结构示意图；
图3为本公开实现视频信息预览的架构的第一实施例示意图；
图4为本公开实现视频信息预览的方法的第一实施例流程示意图；
图5为本公开实现视频信息预览的架构的第二实施例示意图；
图6为本公开实现视频信息预览的方法的第二实施例流程示意图；
图7为本公开实现视频信息预览的方法的第三实施例流程示意图。
具体实施方式
下文中将参考附图并结合实施例来详细说明本公开。需要说明的是，在不冲突的情况下，本公开中的实施例及实施例中的特征可以相互组合。
需要说明的是，本公开的说明书和权利要求书及上述附图中的术语“第一”、“第二”等是用于区别类似的对象，而不必用于描述特定的顺序或先后次序。
为使本公开实施例的目的、技术方案和优点更加清楚明白，下文中将结合附图对本公开的实施例进行详细说明。需要说明的是，在不冲突的情况下，本公开中的实施例及实施例中的特征可以相互任意组合。
图1为本公开实施例中实现视频信息预览的方法的流程图，如图1所示，包括以下步骤：
步骤100：当检测到拖动进度条时，根据拖动的位置信息从描述文件中定位出对应的预览信息，其中，描述文件用于描述预览信息。
客户端可以在播放视频时，从服务器下拉播放的视频的用于描述预览信息的描述文件；
客户端也可以在检测到拖动进度条时，从服务器下拉播放的视频的用于描述预览信息的描述文件。
相应地，在预览服务器端，还包括：利用描述文件描述预览信息。
在内容(包括直播码流)注入到CDN时，首先，从片库下载视频点播(VOD，Video On Demand)节目或接收直播频道码流；接着，通过FFmpeg实时(比如每隔预设时长如10秒钟)抽取预览信息，作为一种示例性实施例，为了提高效率，预览信息最好按照关键帧(I帧)位置抽取；记录抽取预览信息的时间戳；然后，根据抽取的预览信息，通过跨平台的计算 机视觉库(Opencv，Open Source Computer Vision Library)生成预览信息的缩略图。其中，FFmpeg是一个自由软件，可以运行音频和视频多种格式的录影、转换、流功能。生成预览信息后，将预览信息本身、内容唯一标识(CID)(存储外部CID)、时间信息如时间戳和缩略图的对应关系保存在数据库中，并生成节目的预览信息索引文件。
作为一种示例性实施例，预览信息的缩略图的尺寸可以是固定的一种。
作为一种示例性实施例，预览信息的缩略图的尺寸也可以是根据需要生成的多种尺寸的缩略图，不同尺寸的缩略图对应不同分辨率的缩略图数据的虚拟切片文件。本公开部分实施例通过定义不同尺寸的视频预览信息，满足了各种客户端的展示需要。
作为一种示例性实施例，预览信息可以包括海报。
作为一种示例性实施例，所述预览信息索引文件包括一个或多个索引文件，其中，所述一个或多个索引文件用于描述主索引信息和子索引信息。例如，预览信息索引文件可以包括海报主索引文件、子索引描述文件。
描述文件的存储格式举例如表1所示：
Figure PCTCN2018104412-appb-000001
表1
如表1所示，main.zti为海报主索引文件，其他*.zti为海报主索引文件main.zti中对应不同分辨率的子描述索引文件，*.ztd文件则为对应分辨率的不同时间点的缩略图分片即缩略图数据的虚拟切片文件。
本公开实施例中，索引文件可以采用文本格式来描述，其中，海报主 索引文件的示例如表2所示：
Figure PCTCN2018104412-appb-000002
表2
如表2所示的海报主索引文件中包括表1中所示的两个子描述索引文件，其中，子描述索引文件poster-1.zti中给出了图片或映像的分辨率为160*120；子描述索引文件poster-2.zti中给出了图片或映像的分辨率为1280*720。
子描述索引文件的示例如表3所示：
Figure PCTCN2018104412-appb-000003
表3
如表3所示，以子描述索引文件poster-1.zti为例，每个缩略图(segment)分片的统一资源定位符(URL，Uniform Resoure Locator)为SegmentTemplate给定的URL，将其中的$range替换为SegmentList中对应Segment的range参数值(字节范围)。比如表3所示的示例中，如果想请求第二个缩略图，则对应分片的URL为poster-1.ztd？zbytes＝101-200。其中，不同的缩略图与其所在的子描述索引文件下的不同的时间点对应。
作为一种示例性实施例，当预览信息索引文件包括海报主索引文件、子索引描述文件时，本步骤100之前，还可以包括：
客户端播放节目时，首先下载节目的海报主索引文件，从海报主索引文件中找到和客户端展示匹配如满足客户端显示分辨率要求的子索引描 述文件；相应地，
步骤100具体包括：当需要展示预览海报时，比如当检测到拖动进度条时，根据预览的时间点即拖动的位置信息，从与该客户端展示匹配如满足客户端显示分辨率要求的子索引描述文件中解析出对应的海报文件名，并根据解析出的海报文件名下载该海报中对应尺寸的海报缩略图。
步骤101：展示定位出的预览信息。
通过本公开实施例，实现了视频信息预览在客户端的独立完成，而不需要播放器和CDN的参与，利于业务的推广。
本公开实施例还提供一种计算机可读存储介质，存储有计算机可执行指令，所述计算机可执行指令用于执行以上各实施例或示例性实施例中所述的实现视频信息预览的方法。
图2为本公开实施例中客户端的组成结构示意图，如图2所示，该客户端至少包括处理模块、展示模块、存储模块；其中，
存储模块，用于存储描述文件，其中，描述文件用于描述预览信息；
处理模块，用于在检测到拖动进度条时，根据拖动的位置信息从描述文件中定位出对应的预览信息；
展示模块，用于展示定位出的预览信息。
本公开实施例所述的客户端还包括：下拉模块，用于当播放视频时，从服务器下拉播放的视频的所述描述文件；
或者，用于当检测到拖动进度条时，从服务器下拉播放的视频的所述描述文件。
相应地，预览服务器端会至少包括生成模块，用于利用描述文件描述预览信息。
作为一种示例性实施例，所述预览信息索引文件包括一个或多个索引文件，其中，所述一个或多个索引文件用于描述主索引信息和子索引信息。
作为一种示例性实施例，预览信息索引文件可以包括海报主索引文件、 子索引描述文件，处理模块用于：
处理模块自身所在客户端播放节目时，下载节目的海报主索引文件，从海报主索引文件中找到和客户端展示匹配如满足客户端显示分辨率要求的子索引描述文件；
当需要展示预览海报时，比如当检测到拖动进度条时，根据预览的时间点即拖动的位置信息，从与该客户端展示匹配如满足客户端显示分辨率要求的子索引描述文件中解析出对应的海报文件名，并根据解析出的海报文件名下载该海报中对应尺寸的海报缩略图。
本公开实施例还提供了一种实现视频信息预览的装置，包括处理器、存储器以及存储在存储器上可在处理器上运行的计算机程序：当检测到拖动进度条时，根据拖动的位置信息从描述文件中定位出对应的预览信息，其中，描述文件用于描述预览信息；展示定位出的预览信息。
下面结合具体实施例对实现视频信息预览的方法进行详细描述。
第一实施例，以VOD拖动海报为例，图3为本公开实现视频信息预览的架构的第一实施例示意图，如图3所示，第一实施例中，通过内容注入接口通知实现视频信息预览的装置有新内容注入，实现视频信息预览的装置从片库下拉新上线的VOD节目，从节目中按照预先设置的时间间隔如10s抽取海报和生成海报缩略图。
图4为本公开实现视频信息预览的方法的第一实施例流程示意图，如图4所示，客户端播放VOD时实现海报预览的方法包括：
步骤400：客户端上用户播放VOD节目并播放成功。
步骤401：客户端请求下载当前播放的VOD节目对应的海报主索引文件。
可选地，步骤402：边缘缓存(Cache)节点判断本地是否缓存有当前播放的VOD节目对应的海报主索引文件，如果没有，则直接从实现视频信息预览的装置回源HTTP下载。需要说明的是，边缘Cache节点可以省略。
步骤403：客户端解析下载到的海报主索引文件，根据海报主索引文件中的描述，寻找与客户端最适配的尺寸的海报缩略图对应的子描述索引文件。
由于不同尺寸的缩略图对应不同分辨率的缩略图数据的虚拟切片文件，而海报主索引文件中给出了图片或映像的分辨率。因此，根据该分辨率即可找到与客户端最适配的尺寸的海报缩略图对应的子描述索引文件。
步骤404：客户端请求下载对应的子描述索引文件。
可选地，步骤405：边缘Cache节点会判断本地是否缓存有步骤403中得到的对应的子描述索引文件，如果没有，则直接从实现视频信息预览的装置回源超文本传输协定(HTTP，HyperText Transfer Protocol)下载。
步骤406～步骤407：如果检测到用户进行VOD拖动操作，解析下载到的子描述索引文件，根据拖动的位置定位出对应的海报缩略图文件。
如上文表3所示，以子描述索引文件poster-1.zti为例，每个缩略图(segment)分片的统一资源定位符(URL，Uniform Resoure Locator)为SegmentTemplate给定的URL，将其中的$range替换为SegmentList中对应Segment的range参数值(字节范围)。比如表3所示的示例中，如果想请求第二个缩略图，则对应分片的URL为poster-1.ztd？zbytes＝101-200。其中，不同的缩略图与其所在的子描述索引文件下的不同的时间点对应。
步骤408：请求下载对应的海报缩略图文件。
可选地，步骤409：边缘Cache节点会判断本地是否缓存有对应的海报缩略图文件，如果没有，则直接从实现视频信息预览的装置回源HTTP下载。
步骤410：展示下载到的海报缩略图。
第二实施例，以直播时移拖动海报为例，图5为本公开实现视频信息预览的架构的第二实施例示意图，如图5所示，实现视频信息预览的装置从IPTV&OTT的中心节点接收频道码流，如实时流协议(RTSP，Real Time Streaming Protocol)或实时传输协议(RTP，Real-time Transport Protocol) 单播、网络群组管理协议(IGMP，Internet Group Management Protocol)组播、HTTP直播流(HLS，HTTP Live Streaming)单播、动态自适应流送(DASH)单播等，从频道码流中按照预先设置的时间间隔如10s抽取海报和生成海报缩略图。
图6为本公开实现视频信息预览的方法的第二实施例流程示意图，如图6所示，客户端直播时移海报预览的方法包括：
步骤600：客户端上用户切换频道并播放成功。
步骤601：客户端请求下载当前播放频道的海报主索引文件。
可选地，步骤602：边缘Cache节点判断本地是否缓存有当前播放频道对应的海报主索引文件，如果没有，则直接从实现视频信息预览的装置回源HTTP下载。需要说明的是，边缘Cache节点可以省略。
步骤603：客户端解析下载到的海报主索引文件，根据海报主索引文件中的描述，寻找与客户端最适配的尺寸的海报缩略图对应的子描述索引文件。
步骤604：用户切入频道时移转台，客户端请求下载对应的子描述索引文件，在请求中携带有时移范围参数。
可选地，步骤605：边缘Cache节点会判断本地是否缓存有步骤604中得到的对应的子描述索引文件，如果没有，则直接从实现视频信息预览的装置回源HTTP下载。
步骤606：检测到用户进行时移拖动操作。
步骤607：解析下载到的子描述索引文件，根据拖动的位置定位出对应的海报缩略图文件。
步骤608：请求下载对应的海报缩略图文件。
可选地，步骤609：边缘Cache节点会判断本地是否缓存有对应的海报缩略图文件，如果没有，则直接从实现视频信息预览的装置回源HTTP下载。
步骤610：展示下载到的海报缩略图。
第三实施例，以TVOD节目海报预览为例，TVOD的海报生成和频道一致，采用的就是频道时移的海报缩略图。图7为本公开实现视频信息预览的方法的第三实施例流程示意图，如图7所示，客户端播放TVOD时实现海报预览的方法包括：
步骤700：客户端上用户播放TVOD节目并播放成功。
步骤701：客户端请求下载当前播放的TVOD节目的频道对应的海报主索引文件。
可选地，步骤702：边缘缓存(Cache)节点判断本地是否缓存有当前播放的TVOD节目的频道对应的海报主索引文件，如果没有，则直接从实现视频信息预览的装置回源HTTP下载。需要说明的是，边缘Cache节点可以省略。
步骤703：客户端解析下载到的海报主索引文件，根据海报主索引文件中的描述，寻找与客户端最适配的尺寸的海报缩略图对应的子描述索引文件。同时获取TVOD的开始时间和结束时间。
步骤704：客户端请求下载对应的子描述索引文件，在请求中携带有步骤703中获得的开始时间和结束时间。
可选地，步骤705：边缘Cache节点会判断本地是否缓存有步骤703中得到的对应的子描述索引文件，如果没有，则直接从实现视频信息预览的装置回源超文本传输协定(HTTP，HyperText Transfer Protocol)下载。
步骤706～步骤707：如果检测到用户进行TVOD拖动操作，解析下载到的子描述索引文件，根据拖动的位置定位出对应的海报缩略图文件。
步骤708：请求下载对应的海报缩略图文件。
可选地，步骤709：边缘Cache节点会判断本地是否缓存有对应的海报缩略图文件，如果没有，则直接从实现视频信息预览的装置回源HTTP下载。
步骤710：展示下载到的海报缩略图。
以上所述，仅为本公开的较佳实例而已，并非用于限定本公开的保护范围。凡在本公开的原则之内，所做的任何修改、等同替换、改进等，均应包含在本公开的权利要求书所限定的保护范围之内。
显然，本领域的技术人员应该明白，上述的本公开的各模块或各步骤可以用通用的计算装置来实现，它们可以集中在单个的计算装置上，或者分布在多个计算装置所组成的网络上，可选地，它们可以用计算装置可执行的程序代码来实现，从而，可以将它们存储在存储装置中由计算装置来执行，并且在某些情况下，可以以不同于此处的顺序执行所示出或描述的步骤，或者将它们分别制作成各个集成电路模块，或者将它们中的多个模块或步骤制作成单个集成电路模块来实现。这样，本公开不限制于任何特定的硬件和软件结合。
工业实用性
根据本公开的实施例中所述的方案，当检测到拖动进度条时，根据拖动的位置信息从描述文件中定位出对应的预览信息，其中，描述文件用于描述预览信息；展示定位出的预览信息。通过该方案，实现了视频信息预览在客户端的独立完成，而不需要播放器和CDN的参与，利于业务的推广，具有较好的工业实用性。

Claims (12)

  1. 一种实现视频信息预览的方法，包括：
    当检测到拖动进度条时，根据拖动的位置信息从描述文件中定位出对应的预览信息，其中，描述文件用于描述预览信息；
    展示定位出的预览信息。
  2. 根据权利要求1所述的方法，其中，所述方法还包括：
    当播放视频时，从服务器下拉播放的所述视频的所述描述文件；
    或者，当检测到拖动所述进度条时，从服务器下拉播放的视频的所述描述文件。
  3. 根据权利要求1所述的方法，其中，所述预览信息的缩略图的尺寸包括一种或一种以上。
  4. 根据权利要求1或2所述的方法，其中，所述预览信息索引文件包括一个或多个索引文件，其中，所述一个或多个索引文件用于描述主索引信息和子索引信息。
  5. 根据权利要求4所述的方法，其中，所述预览信息包括海报；所述所述预览信息索引文件包括海报主索引文件、子索引描述文件；
    其中，子索引描述文件为海报主索引文件中对应不同分辨率的子描述索引文件；所述缩略图为对应分辨率的不同时间点的缩略图分片。
  6. 根据权利要求5所述的方法，其中，所述方法还包括：播放节目时，下载节目的所述海报主索引文件，从海报主索引文件中找到和客户端展示匹配的所述子索引描述文件；
    所述根据拖动的位置信息从描述文件中定位出对应的预览信息包括：
    根据所述拖动的位置信息，从与该客户端展示匹配的子索引描述 文件中解析出对应的海报文件名；
    根据解析出的海报文件名下载该海报中对应尺寸的海报缩略图。
  7. 一种客户端，包括处理模块、展示模块、存储模块；其中，
    所述存储模块，用于存储描述文件，其中，描述文件用于描述预览信息；
    所述处理模块，用于在检测到拖动进度条时，根据拖动的位置信息从描述文件中定位出对应的预览信息；
    所述展示模块，用于展示定位出的预览信息。
  8. 根据权利要求7所述的客户端，其中，所述客户端还包括：下拉模块，用于当播放视频时，从服务器下拉播放的所述视频的所述描述文件；
    或者，用于当检测到拖动所述进度条时，从服务器下拉播放的视频的所述描述文件。
  9. 根据权利要求7或8所述的客户端，其中，所述预览信息索引文件包括一个或多个索引文件，其中，所述一个或多个索引文件用于描述主索引信息和子索引信息。
  10. 根据权利要求9所述的客户端，其中，所述预览信息包括海报；所述预览信息对应的预览信息索引文件包括海报主索引文件、子索引描述文件，所述处理模块用于：
    处理模块自身所在客户端播放节目时，下载节目的海报主索引文件，从海报主索引文件中找到和客户端展示匹配的子索引描述文件；
    当需要展示预览海报时，根据所述拖动的位置信息，从与该客户端展示匹配的子索引描述文件中解析出对应的海报文件名，并根据解析出的海报文件名下载该海报中对应尺寸的海报缩略图。
  11. 一种计算机可读存储介质，存储有计算机可执行指令，所述计算机可执行指令用于执行权利要求1～权利要求6任一项所述的实现视频信息预览的方法。
  12. 一种实现视频信息预览的装置，包括处理器、存储器以及存储在存储器上可在处理器上运行的计算机程序：当检测到拖动进度条时，根据拖动的位置信息从描述文件中定位出对应的预览信息，其中，描述文件用于描述预览信息；展示定位出的预览信息。
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