31results about How to "Reduce live broadcast delay" patented technology

The invention relates to a video stream processing method and apparatus. The method comprises the following steps: obtaining first audio stream data in live video stream data; performing voice recognition on the first audio stream data to obtain a voice recognition text; generating subtitle data comprising a subtitle text according to the voice recognition text; and adding the subtitle text to acorresponding image frame in the live video stream data according to time information to obtain processed live video stream data. By adoption of the scheme shown in the invention, in a live broadcastscene, the audio stream data in the live video stream data can be obtained, the voice recognition is performed on the audio stream data, the subtitle data are generated according to the recognition result, and the subtitle text in the subtitle data is added to the image frame of the corresponding subtitle text in the video stream according to the time information to obtain a live video stream containing the subtitle, in this way, accurate synchronization of the subtitle and the video image is achieved, meanwhile, as the subtitle data do not need to be manually inserted, the live broadcast delay can be effectively shortened.

The invention provides a system for distributing live broadcast contents. The system comprises a central node and at least one edge node, wherein the edge node is directly connected with the central node or is connected with the central node through one or more edge nodes; the central node is connected with a live broadcast source and is used for acquiring transport stream (TS) and sending the TS to the edge node; the edge node is used for encapsulating and storing the TS acquired from the central node, receiving a request from a client of the node and providing a live broadcast service. The invention also provides a method for distributing the live broadcast contents, in particular a method for distributing the live broadcast contents for large-scale commercial use.

The present invention discloses a method and an apparatus for pushing live stream media data. The method comprises the steps of determining a target server in a server cluster used as a live relay node; acquiring live source data from a preset server by the target server; and pushing the live stream media data to audience clients by the target server, wherein the live stream media data is stream media data obtained after the live source data is transcoded, and the live source data is multimedia data that is collected and uploaded to the preset server by an anchor client in live broadcast. According to the method, the server cluster used as the live relay node can share the service pressure of the preset server, so that stalling of the audience client is relieved, the live broadcast quality is improved, the method and apparatus are highly available, and the user experience is improved.

The invention provides a live broadcast data processing method and device, a live broadcast method and device and a live broadcast server, and relates to the field of Internet multimedia, comprising the following steps: slicing live broadcast transport stream (TS) data received in real time, and storing the obtained current TS slice in a storage area of the slice according to a preset rule; Updating the storage address of the TS slice in the preset m3u8 file into the storage address of the current TS slice; And when a live broadcast request of the client is received, sending the preset m3u8 file to the client, so that the client realizes live broadcast based on the storage address of the TS slice in the m3u8 file and a preset rule. According to the method, the client only needs to requestthe m3u8 file to the server once during live broadcast, so that the situation that an http request is repeatedly initiated to the server to update the m3u8 file is avoided, and the pressure of the server and the consumption of hardware resources are reduced.

The invention relates to a method for reducing the live broadcasting delay. The method comprises the steps of: S1, reducing the delay of a video coder; S2, optimizing a transmission network; S3, adaptively reducing the delay of the code rate of a flow pushing terminal; and S4, optimizing the delay of a playing terminal. The method disclosed by the invention has the advantages that: after various modules of a live broadcasting system are delayed and optimized, the live broadcasting delay of the system is nearly up to the minimum in the industry; in a weak network environment, too much cumulative delay cannot be generated through the technical scheme in the invention; and thus, the synchronism of a video and an interaction message can be ensured.

The invention discloses an audio and video stream direct broadcast method based on an HLS protocol. The method comprises a download thread and a play thread, wherein the download thread is used for managing a local cache directory, and requesting an m3u8 file and a video slice file for a content distribution end; the play thread is used for analyzing the m3u8 file in the cache directory, calculating slices needed to be played according to an EXMS value and a media serial number that has been played in the m3u8 file, and orderly playing; and the download thread and the play thread are executed asynchronously. The method of the invention guarantees the low delay of live broadcast, and increases the fluency of the live broadcast under the condition that the network environment is bad; besides, a management mechanism of a slice naming rule and the cache directory ensures that the local storage space occupation is less and no junk files are generated.

The present invention discloses a video file playing method and apparatus. The method comprises steps of scanning a current buffering value of a video player in a process in which the video player plays a video file; determining whether the current buffering value is greater than a preset buffering threshold; if it is determined that the current buffering value is greater than the buffering threshold, obtaining a jumping time length, wherein the jumping time length is obtained according to the current buffering value and a first play buffering value; and continuing to play a video file by jumping for the jumping time length from a frame freezing moment, wherein the frame freezing moment is a moment at which data in a buffer of the video player is finished playing. The method resolves a technical problem of delay accumulation caused by network congestion and frame freezing.

The embodiment of the invention discloses a media file playing method. The method comprises the following steps: performing encoding processing on a media file to obtain a multicast transport stream TS code stream and dynamic code rate adaptive HLS fragments; and providing multicast live broadcast service according to the multicast TS code stream, and providing time shift service according to the HLS fragments. The embodiment of the invention further discloses a server, a client and a media file playing system.

The embodiment of the invention provides a network live broadcast system and method. The system comprises a live broadcast source, a request processing unit, a central processing unit, a plurality ofclients and a plurality of CDN nodes, wherein the central processing unit is connected with the live broadcast source, the request processing unit and the plurality of CDN nodes; the request processing unit is connected with the client; the live broadcast source is used for sending live broadcast data to the central processing unit, and the request processing unit is used for receiving a live broadcast request sent by any client and obtaining request content based on the live broadcast request; and the central processing unit selects specified live broadcast data from the live broadcast data based on the request content, selects an optimal CDN node from the plurality of CDN nodes, and sends the specified live broadcast data to the client through the optimal CDN node. According to the system and the method provided by the embodiment of the invention, the live broadcast time delay is effectively reduced, the live broadcast playing quality is improved, and the user experience of live broadcast audiences is optimized.

The embodiment of the invention relates to the technical field of communication, and discloses a video slicing method, a terminal and a storage medium. The method comprises the following steps of determining the scene information of an encoded video; determining the slicing length according to the scene information; and slicing the coded video according to the slicing length, so that the live broadcast time delay is reduced, at the same time, the waste of system resources can be reduced.

The invention discloses an HLS streaming media playing method, system and device and a storage medium. The method comprises: when a playlist request is received, selecting a TS slice length corresponding to the playlist request through a file name of the playlist request sent by a user, and then detecting whether a playlist corresponding to the TS slice length exists in a slice module or not; whenthe playlist does not exist, extracting a video frame in a preset buffer streaming media; generating a target playlist according to the video frame and the TS slice length, and uploading the target playlist to a client corresponding to the playlist request for the user to watch. Since the playlist is generated according to the TS slice lengths corresponding to different playlist requests, the shorter the TS slice length is, the shorter the delay of watching the streaming media live broadcast by the user is, so that the live broadcast delay is effectively reduced, streaming media transmissionis carried out through an HLS protocol, and the convenience of streaming media plug-in-free playing is reserved.

The invention discloses a program processing system which comprises a server, a first data device, a second data device, a gateway device and a live broadcast device, wherein the server is used for acquiring program playing data sent by the live broadcast device, determining hot-broadcast programs and common programs according to the program playing data, sending a list of the common programs to the first data device, and sending a list of the hot-broadcast programs to the second data device; the first data device is used for receiving the list of the common programs and converting the video data of the common programs in the list of the common programs into ethernet data signals; the second data device is used for receiving the list of the hot-broadcast programs and converting the video data of the hot-broadcast programs in the list of the hot-broadcast programs into a digital video broadcast DVB signal; the gateway device is used for acquiring the lists of the hot-broadcast programsand the common programs, pre-caching the video data of each hot-broadcast program in the list of the hot-broadcast programs, receiving a playing request sent by the live broadcast device, and sendingthe video data to the live broadcast device according to the playing request; and the live broadcast device is used for playing the hot-broadcast programs and the common programs.

The invention relates to a mobile terminal low-latency streaming media player, which comprises a HTTP protocol analyzing module, a media stream pre-processing module, a local caching module, a media analyzing module, an audio decoding module, a video decoding module and a media echo module, wherein a network data input end of the HTTP protocol analyzing module is used for accessing a media server,a media file output end of the HTTP protocol analyzing module is connected with a media file input end of the media stream pre-processing module, a media stream output end of the media stream pre-processing module is connected with a media stream input end of the local caching module, and a media stream communication end of the local caching module is connected with a media stream communication end of the media analyzing module. According to the player and the playing method, downloading of an flv media stream is realized based on an HTTP protocol, an flv parser is implemented, the audio dataand the video data are extracted from the flv parser, and the original media data are restored through corresponding decoding; and the original media data are echoed through equipment, so that related media-on-demand and live-broadcast watching services are provided for the user.

The embodiment of the invention discloses a method and system for reducing live time delay and a terminal. The method comprises: a media stream slice is downloaded from a server through a terminal; a network bandwidth B connected with a server is detected, when the network bandwidth B is larger a preset bandwidth, a play probe is pointed to the position of the media stream slice corresponding to the network bandwidth to perform play to reach the purpose of reducing the live time delay and effectively improve the user experience with no need for adding extra hardware device and in the condition of without changing of the original streaming media network device.

The invention provides a Hash algorithm-based low-delay live broadcast caching method, apparatus and device, and a medium. The method comprises the steps of establishing a bidirectional signaling channel; initiating media scheduling based on the bidirectional signaling channel, and generating a media scheduling result; synchronizing all levels of cache servers based on a media scheduling result; obtaining a time shift access request, analyzing the time shift access request, calculating cache time information, and generating a cache time result; on the basis of the cache time result, cache keyword information is obtained, hash operation is carried out on the cache keyword information, and a cache keyword result is generated; caching the media information by using a consistent Hash caching mode based on the caching keyword result; and searching the cache media information, and generating a time shifting service result. The invention relates to the technical field of audio and video caching, time shifting and live broadcast contents are cached through a Hash algorithm, and large-range hit of time shifting caching is ensured, so that the pressure of accessing a time shifting request of a source station is reduced to the greatest extent, and the live broadcast time delay is reduced.

The embodiment of the invention provides a streaming media data transmission method, equipment and device, and a computer storage medium. The method is applied to a Package, and comprises the following steps: generating at least one streaming media data file containing file fragments of chunk sub-fragments, wherein each file fragment comprises one or more chunk sub-fragments, and each chunk sub-fragment is a file capable of being played independently; when a request for obtaining the chunk sub-fragments from a content delivery network CDN edge node is received, sending the corresponding chunksub-fragments to the CDN edge node according to the request for obtaining the chunk sub-fragments.

The invention provides a live broadcast method and device, a network node and a storage medium. The method comprises the following steps: collecting a live broadcast content request of a first client, wherein the live broadcast content request is used for requesting live broadcast fragment files; according to the live broadcast content request, obtaining a packaged file block, and sending the packaged file block to the first client; and continuously obtaining the newly packaged file block, and sending the newly packaged file block to the first client until the live broadcast fragmented file is sent completely. After receiving the live broadcast content request of the first client, the network node can transmit the live broadcast content to the first client by transmitting the file blocks of the live broadcast fragmented file, that is, the content of the live broadcast fragmented file can be distributed in the generation process of the live broadcast fragmented file; and the live broadcast fragment file does not need to be transmitted to the first client after the whole live broadcast fragment file is completely generated, so that the end-to-end live broadcast time delay in the live broadcast process is greatly reduced.

The invention provides a processing method for improving real-time performance of MPEG-DASH, which is characterized in that a plurality of paths of code rates is generated at a server side, corresponding playlists are created, and a player side selects the playlist corresponding to the code rate according to network bandwidth. According to the invention, the real-time problem of the MPEG-DASH service is solved, the live broadcast delay of the MPEG-DASH protocol can be reduced, and the minimum delay can reach about 1 second.

The invention discloses an audio and video stream direct broadcast method based on an HLS protocol. The method comprises a download thread and a play thread, wherein the download thread is used for managing a local cache directory, and requesting an m3u8 file and a video slice file for a content distribution end; the play thread is used for analyzing the m3u8 file in the cache directory, calculating slices needed to be played according to an EXMS value and a media serial number that has been played in the m3u8 file, and orderly playing; and the download thread and the play thread are executed asynchronously. The method of the invention guarantees the low delay of live broadcast, and increases the fluency of the live broadcast under the condition that the network environment is bad; besides, a management mechanism of a slice naming rule and the cache directory ensures that the local storage space occupation is less and no junk files are generated.

The invention discloses a live broadcast data processing method, a computing device and a readable storage medium, and the method comprises the steps: determining the cumulative number of picture lagging in a first preset period when a lagging event is monitored, determining a target playing restoration mode corresponding to the cumulative number of picture lagging, and restoring the target playing restoration mode according to the target playing restoration mode. The data duration in the buffer area corresponding to each playing recovery mode corresponds to the accumulated number of times of picture lagging, judging whether a frame chasing strategy is started or not, if yes, determining a target frame chasing mode according to the data duration in the buffer area at the current moment, and continuing to play the live broadcast data in the buffer area in the target frame chasing mode according to the target playing recovery mode, and if not, continuing to play the live broadcast data in the buffer area in the target frame chasing mode. The playing rate of each frame chasing mode is positively correlated with the data size in the buffer area, and if the frame chasing strategy is not started, continuing to play the live broadcast data in the buffer area at the normal playing rate according to the target playing recovery mode. Therefore, when the lag occurs, the balance of the image lag and the live broadcast delay is realized through the playing recovery strategy and the frame chasing strategy.

The invention discloses an ultra-high-definition multi-channel live broadcast display processing method and system, an intelligent terminal and a medium, and the method comprises the steps: obtaining a multi-channel live broadcast instruction, and enabling a display device to initiate an access request; the acquisition device monitors the access request according to the IP information of the sixth version IPv6 address of the Internet protocol; and if the communication handshake between the display device and the corresponding acquisition device succeeds, a 5G network direct connection channel is established, and the acquisition device acquires video data in real time and sends the video data acquired in real time to the display device through the 5G network direct connection channel. According to the invention, multi-channel ultra-high-definition acquisition and multi-channel ultra-high-definition display collaborative live broadcast application can be realized; the control surface is completed through the cooperative service of the cloud server, and the data surface realizes transmission through 5G and IPv6 direct connection; the data does not need to be distributed through a server, thereby greatly shortening the network transmission path of the video data, and effectively reducing the live broadcast delay. And meanwhile, the server only needs to perform cooperative scheduling, so that the load can be effectively reduced, and the cost is reduced.