CN114666616A - Low-cost high-confidentiality live broadcast playback method - Google Patents

Low-cost high-confidentiality live broadcast playback method Download PDF

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Publication number
CN114666616A
CN114666616A CN202210259550.XA CN202210259550A CN114666616A CN 114666616 A CN114666616 A CN 114666616A CN 202210259550 A CN202210259550 A CN 202210259550A CN 114666616 A CN114666616 A CN 114666616A
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China
Prior art keywords
video
live
hand
playback
low
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Pending
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CN202210259550.XA
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Chinese (zh)
Inventor
于江虎
相生昌
顾君
张宏伟
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Tongfang Knowledge Network Digital Publishing Technology Co ltd
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Tongfang Knowledge Network Digital Publishing Technology Co ltd
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Priority to CN202210259550.XA priority Critical patent/CN114666616A/en
Publication of CN114666616A publication Critical patent/CN114666616A/en
Pending legal-status Critical Current

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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
    • H04N21/21—Server components or server architectures
    • H04N21/218—Source of audio or video content, e.g. local disk arrays
    • H04N21/2187—Live feed
    • 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
    • H04N21/231—Content storage operation, e.g. caching movies for short term storage, replicating data over plural servers, prioritizing data for deletion
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/234—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs
    • H04N21/23424—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs involving splicing one content stream with another content stream, e.g. for inserting or substituting an advertisement
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/234—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs
    • H04N21/2343—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements
    • H04N21/234309—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements by transcoding between formats or standards, e.g. from MPEG-2 to MPEG-4 or from Quicktime to Realvideo
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/234—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs
    • H04N21/2343—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 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, manipulating MPEG-4 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]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/234—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs
    • H04N21/2343—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements
    • H04N21/234381—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements by altering the temporal resolution, e.g. decreasing the frame rate by frame skipping
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/234—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs
    • H04N21/2347—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs involving video stream encryption
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/25—Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
    • H04N21/266—Channel or content management, e.g. generation and management of keys and entitlement messages in a conditional access system, merging a VOD unicast channel into a multicast channel
    • H04N21/26613—Channel or content management, e.g. generation and management of keys and entitlement messages in a conditional access system, merging a VOD unicast channel into a multicast channel for generating or managing keys in general
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—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

Abstract

The invention discloses a low-cost high-confidentiality live broadcast playback method, which comprises the following steps: when the cloud network is used for live broadcasting, live broadcasting videos are recorded to a local server in real time and backup is carried out; merging, trimming and transcoding the resolution of the local video which is backed up for processing, carrying out slice encryption on the transcoded video and generating a playback key in a video management platform; synchronizing the processed and encrypted local video data and the ciphertext thereof to the cloud end at the same time; live playback is provided for the user. The invention not only can save the flow cost, the transcoding cost and the encryption cost for the live broadcasting host (company/unit/individual), but also can process the abnormal and sensitive information in the live broadcasting process, and finally, the cost is very low to ensure the high-efficiency, safe and smooth operation of the live broadcasting playback service.

Description

Low-cost high-confidentiality live broadcast playback method
Technical Field
The invention relates to the technical field of network live broadcast, in particular to a low-cost and high-confidentiality live broadcast playback method.
Background
The academic live broadcast is one of network live broadcasts, and is used for academic spread and communication in a live broadcast mode. Interested users can participate in live interactive communication on line, and can also watch live playback after live broadcasting is finished. But a general company/unit/organization network is not enough to support a high concurrency scene, and when the fans of the live broadcast room reach a certain amount, a bandwidth problem occurs, and a cloud network can be used for solving the bandwidth problem. The following problems are faced during the live playback phase by using the cloud network (storing video data in the cloud):
1. if the live video is not transcoded, all the users see that the live playback is the original video in the live broadcasting process, and the video size and the video length are the same as those of the live broadcasting link, so that companies/units/organizations need to pay expensive flow cost to the cloud (for example, 1G broadband enterprises rent about 70-80 ten thousand per year);
2. transcoding live video (different sizes) using a cloud network transcoding service, a user watching live playback will save a part of traffic cost, but companies/units/organizations need to pay extra transcoding cost to the cloud (transcoding cost is generally calculated in minutes);
3. if the live video is not encrypted, the video is easy to steal by a client user;
4. live video, if encrypted, companies/units/agencies need to pay the cloud additional encryption fees.
Disclosure of Invention
In order to solve the above technical problems, the present invention aims to provide a low-cost and high-security live playback method.
The purpose of the invention is realized by the following technical scheme:
a low-cost high-security live playback method comprises the following steps:
A. when the cloud network is used for live broadcasting, live video is recorded to a local server in real time and is backed up;
B. merging, trimming and transcoding the resolution of the local video which is backed up for processing, carrying out slice encryption on the transcoded video and generating a playback key in a video management platform;
C. synchronizing the processed and encrypted local video data and the ciphertext thereof to the cloud end at the same time;
D. live playback is provided for the user.
One or more embodiments of the present invention may have the following advantages over the prior art:
compared with the prior art, the scheme can not only save flow cost, transcoding cost and encryption cost for live broadcasting hosts (companies/units/individuals), but also can process abnormal and sensitive information in the live broadcasting process, and finally cost is low to ensure that live broadcasting playback service is efficiently, safely and smoothly carried out.
Drawings
Fig. 1 is a flow chart of a low-cost high-security live playback method.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the following embodiments and accompanying drawings.
As shown in fig. 1, a low-cost and high-security live playback method flow and a system diagram implemented by the method are provided, where the method includes:
step 10, when the live broadcast is carried out by using a cloud network, recording the live broadcast video to a local server in real time and carrying out backup;
the backup adopts double backup, namely v _ backup and v _ hand, wherein v _ backup is used for storage, and v _ hand is used for processing.
Step 20, merging, trimming and transcoding the local video backed up for processing, carrying out slice encryption on the transcoded video and generating a playback key in a video management platform;
the backup processing for processing v _ hand video data comprises the following steps:
b1, merging the v _ hand fragments to obtain an mp4 file v _ hand _ new _ mp 4;
1) transcoding v _ hand into a plurality of videos v _ hand _ new with uniform resolution;
2) converting v _ hand _ new into a plurality of mts files v _ hand _ new _ mts _ set;
3) merging the v _ hand _ new _ mts _ set into an mts file v _ hand _ new _ mts;
4) the v _ hand _ new _ mts is converted into the H264 encoded mp4 file v _ hand _ new _ mp 4.
B2, trimming the mp4 file v _ hand _ new _ mp4 to obtain a file v _ hand _ mp 4;
1) watching the merged mp4 file in a video processing platform, and marking the start and stop time of the debugging video in the platform;
2) marking start-stop time after the live broadcast is finished;
3) marking video start-stop time with disputes or graphic error and voice error in the live broadcast process;
4) marking the start-stop time of the video with other problems in the live broadcast process;
5) and pruning all marked video clips to obtain a processed file v _ enhanced _ mp 4.
B3, transcoding the trimmed video v _ finished _ mp4 into three videos, namely v _ finished _ mp4_ ted, of high definition, standard definition and normal definition { "high definition": h _ mp4, "standard definition": s _ mp4, "Puqing": g _ mp4 };
b4, slicing and encrypting the processed three definition videos v _ enhanced _ mp4_ ted to obtain v _ enhanced _ mp4_ s { "high definition": h _ mp4, "standard definition": s _ mp4, "Puqing": g _ mp4}, and generating a playback key uuid in the video management platform for the current live broadcast, wherein the specific flow comprises the following steps:
1) generating a key for live playback video, comprising:
1.1) generating a 32-bit UUID and intercepting 16 characters in [8,23] in the UUID;
1.2) carrying out Base64 encoding on the characters in the 1.1) to generate a plaintext uuid.key;
1.3) carrying out 3des encryption on the uuid.key and the 16 characters to generate a ciphertext uuid.key;
2) and (5) slicing the videos with three definitions by using a plaintext uuid.
Step 30, synchronizing the processed and encrypted local video data and the ciphertext thereof to the cloud end at the same time;
synchronizing the processed encrypted video segment v _ enhanced _ mp4_ s and the ciphertext uuid.key to the cloud end at the same time, and simultaneously distributing the video segment v _ enhanced _ mp4_ s and the ciphertext uuid.key to a CDN network for video acceleration;
step 40 providing live playback for a user;
and playing the video by using a video player with a decryption key, and providing a video playback service.
The above embodiment is embodied as follows:
scene: a known expert a makes a 90 minute live broadcast of "thesis integrity and academic thesis writing", and it is expected that the number of people watching the live broadcast reaches 1 million people, and the number of people watching the playback video reaches 2 million people and can watch the playback video completely.
And (3) analyzing the cost: the video bit rate of the live video is 2500 Kbps, and the rented cloud bandwidth is 1 block of money according to the condition that each person watches the live video every hour
1) Conventional methods watch playback: 2 ten thousand people watch the playback, utilize the cloud server, and do not carry on video processing and do not produce the transcoding expense and calculate, produce the expense of 1 yuan per hour for each person, cost 30000 yuan altogether.
2) The method comprises the following steps: the two videos compressed into 720P and 480P are provided to a pc end user for watching and a mobile phone end user for watching, wherein the ratio of the videos to the videos is 50%, and the calculation rule is as follows:
the 720P video bit rate is reduced to 625 Kbps, the hourly cost of each person is 0.25 yuan, and the viewing of the playback video is 3750 yuan;
the bit rate of 480P video is 400 Kbps, the hourly production cost of each person is 0.16 yuan, and the watching of playback video is 2400 yuan;
the total cost is as follows: the price for viewing the played back video is 6150 yuan.
3) The invention can save 80% (1-6150/30000) of the cost for company/unit/organization for the whole playback process.
The task requirements are as follows: the method has the advantages that the live broadcast is guaranteed to be smooth, and the live broadcast cost is maximally compressed when the playback service is provided after the live broadcast is finished.
The treatment method comprises the following steps:
1) recording live video in real time: firstly, a cloud network is used for ensuring smooth live broadcast, and simultaneously, live broadcast video is shunted to a local server to perform double backup to be v _ backup for storage and v _ hand for processing;
2) processing the v _ hand video data:
a) merging v _ hand (a plurality of fragments);
b) clipping (manual intervention) the mp4 file v _ hand _ new _ mp 4: bad and sensitive data can be removed;
c) transcoding the trimmed video v _ enhanced _ mp4, and converting the video v _ enhanced _ mp4_ ted into three videos of high definition, standard definition and common definition { "high definition": h _ mp4, "standard definition": s _ mp4, "Puqing": g _ mp4 }: the cloud transcoding cost and the cloud flow cost can be saved;
d) slicing and encrypting the processed video v _ enhanced _ mp4_ ted with three resolutions to obtain v _ enhanced _ mp4_ s { "high definition": h _ mp4, "standard definition": s _ mp4, "Puqing": g _ mp4}, and generates a playback key uuid. key for this live play in the video management platform: the cloud encryption cost can be saved, and smooth playback can be ensured;
3) synchronizing the local video to the cloud: synchronizing the processed encrypted video segment v _ enhanced _ mp4_ s and the ciphertext uuid.key to the cloud end at the same time, and simultaneously distributing the video segment v _ enhanced _ mp4_ s and the ciphertext uuid.key to a CDN network for video acceleration;
4) and providing live playback service for the user, namely playing videos by using a video player with a decryption key, and providing the video playback service.
Although the embodiments of the present invention have been described above, the above descriptions are only for the convenience of understanding the present invention, and are not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (8)

1. A low-cost high-security live broadcast playback method is characterized by comprising the following steps:
A. when the cloud network is used for live broadcasting, live broadcasting videos are recorded to a local server in real time and backup is carried out;
B. merging, trimming and transcoding the resolution of the local video which is backed up for processing, carrying out slice encryption on the transcoded video and generating a playback key in a video management platform;
C. synchronizing the processed and encrypted local video data and the ciphertext thereof to the cloud end at the same time;
D. live playback is provided for the user.
2. The low-cost high-privacy live playback method of claim 1, wherein the a specifically comprises: the live video recording method includes the steps that live video of live broadcast is recorded in real time, and double backup is carried out by distributing the live video recorded in real time to a local server while live broadcast is carried out through a cloud network: v _ backup and v _ hand, wherein v _ backup is used for storage and v _ hand is used for processing.
3. The low-cost, high-security live playback method of claim 1, wherein backing up the elaboration process for elaboration process (v _ hand) video data in B comprises:
b1, merging the v _ hand fragments to obtain an mp4 file v _ hand _ new _ mp 4;
b2, trimming the mp4 file v _ hand _ new _ mp4 to obtain a file v _ hand _ mp 4;
b3, transcoding the trimmed video v _ finished _ mp4 into three videos, namely v _ finished _ mp4_ ted, of high definition, standard definition and normal definition { "high definition": h _ mp4, "standard definition": s _ mp4, "Puqing": g _ mp4 };
b4, slicing and encrypting the three videos v _ modified _ mp4_ ted to obtain v _ modified _ mp4_ s { "high definition": h _ mp4, "standard definition": s _ mp4, "Puqing": g _ mp4, and generating a playback key uuid.
4. The low-cost high-privacy live playback method of claim 3, wherein the B1 specifically comprises:
1) transcoding the v _ hand into a plurality of videos v _ hand _ new with uniform resolution;
2) converting v _ hand _ new into a plurality of mts files v _ hand _ new _ mts _ set;
3) merging the v _ hand _ new _ mts _ set into an mts file v _ hand _ new _ mts;
4) the v _ hand _ new _ mts is converted into the H264 encoded mp4 file v _ hand _ new _ mp 4.
5. The low-cost high-privacy live playback method of claim 3, wherein the B2 specifically comprises:
1) watching the merged mp4 file in a video processing platform, and marking the start and stop time of the debugging video in the platform;
2) marking start-stop time after the live broadcast is finished;
3) marking video start-stop time with disputes or graphic error and voice error in the live broadcast process;
4) marking the start-stop time of videos with other problems in the live broadcasting process;
5) and pruning all marked video clips to obtain a processed file v _ enhanced _ mp 4.
6. The low-cost high-privacy live playback method of claim 3, wherein the B4 comprises:
1) generating a key of a live playback video, specifically comprising:
1.1) generating a 32-bit UUID and intercepting 16 characters in [8,23] in the UUID;
1.2) carrying out Base64 encoding on the characters in the 1.1) to generate a plaintext uuid.key;
1.3) carrying out 3des encryption on the uuid.key and the 16 characters to generate a ciphertext uuid.key;
2) and (5) slicing the videos with three definitions by using a plaintext uuid.
7. The low-cost high-security live playback method of claim 1, wherein in the step C, the processed encrypted video clip v _ enhanced _ mp4_ s and the playback key uuid.
8. The low-cost high-security live playback method of claim 1, wherein a video player with a decryption key is used in D for video playing and video playback services are provided.
CN202210259550.XA 2022-03-16 2022-03-16 Low-cost high-confidentiality live broadcast playback method Pending CN114666616A (en)

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CN105959716A (en) * 2016-05-13 2016-09-21 武汉斗鱼网络科技有限公司 Method and system for automatically recommending definition based on user equipment
CN106804000A (en) * 2017-02-28 2017-06-06 北京小米移动软件有限公司 Direct playing and playback method and device
CN108111876A (en) * 2017-12-21 2018-06-01 北京四达时代软件技术股份有限公司 A kind of LAN video contents of streaming media method for security protection, terminal and server
CN108881205A (en) * 2018-06-08 2018-11-23 西安理工大学 A kind of safety broadcasting system and playback method of HLS Streaming Media
CN110138716A (en) * 2018-02-09 2019-08-16 网宿科技股份有限公司 A kind of offer of key, video broadcasting method, server and client
CN113727144A (en) * 2021-09-02 2021-11-30 中国联合网络通信集团有限公司 High-definition live broadcast system and streaming media method based on mixed cloud

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104935854A (en) * 2013-12-30 2015-09-23 恩智浦有限公司 Method for video recording and editing assistant
CN105959716A (en) * 2016-05-13 2016-09-21 武汉斗鱼网络科技有限公司 Method and system for automatically recommending definition based on user equipment
CN106804000A (en) * 2017-02-28 2017-06-06 北京小米移动软件有限公司 Direct playing and playback method and device
CN108111876A (en) * 2017-12-21 2018-06-01 北京四达时代软件技术股份有限公司 A kind of LAN video contents of streaming media method for security protection, terminal and server
CN110138716A (en) * 2018-02-09 2019-08-16 网宿科技股份有限公司 A kind of offer of key, video broadcasting method, server and client
CN108881205A (en) * 2018-06-08 2018-11-23 西安理工大学 A kind of safety broadcasting system and playback method of HLS Streaming Media
CN113727144A (en) * 2021-09-02 2021-11-30 中国联合网络通信集团有限公司 High-definition live broadcast system and streaming media method based on mixed cloud

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