CN103491333B - A kind of video distributing method being applied to one-to-many video broadcasting - Google Patents
A kind of video distributing method being applied to one-to-many video broadcasting Download PDFInfo
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- CN103491333B CN103491333B CN201310412375.4A CN201310412375A CN103491333B CN 103491333 B CN103491333 B CN 103491333B CN 201310412375 A CN201310412375 A CN 201310412375A CN 103491333 B CN103491333 B CN 103491333B
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Abstract
The invention discloses a kind of compatibility preferably, the video distributing method of network interference resistance, picture synchronization, video source server end is used uniformly across H264 coding and recompiles the video file needing broadcasting, the file of 1080P form is demoted, through decoding after media file to be played input, it is divided into two-way, one tunnel directly plays back in this locality, and the queue of a length of n when placement one is minimum on this path, the present invention is transmitted for different input videos, the video flowing producing unified specification.Thus improve the transmission compatibility to network environment.Terminal would only receive a kind of video flowing supporting specification simultaneously, thus improves terminal transparency.And the video source server in the present invention is in the video flowing of transmission, adds certain redundant data for the loss of data resisting in transmission.Thus possess preferable network interference resistance ability, and then improve the compatibility to various network environments.
Description
Technical field
The present invention relates to a kind of video broadcasting transmission scheme, especially a kind of compatible preferably, network interference resistance,
The video distributing method of picture synchronization.
Background technology
In current one-to-many video broadcasting scheme, video broadcasting, is led to video data by video source server
Cross multicast mode be pushed to terminal and play.Such broadcast mode is usually at teacher computer and the machine for student of multi-media classroom
Between carry out, but traditional multicast pushes mode and there is problems with, i.e. because hardware is joined between teacher computer and machine for student
The difference compatibility performance put is the best, and under wireless network environment, in transmission, network interferences ratio is more serious, audio/video file
Broadcasting is susceptible to Caton phenomenon.
And the network delay caused due to network transmission is inevitable, i.e. picture between teacher computer and machine for student
Can not synchronize, because it is to synchronize that the sound of teacher computer and picture determine, the when of so seeing picture on machine for student, sound
Sound has shifted to an earlier date, and picture sound asynchrony phenomenon is serious.
Summary of the invention
Goal of the invention: for the deficiencies in the prior art, applicant, through long-term practical exploration, devises one
Plant compatible preferable, the video distributing method of network interference resistance, picture synchronization.
Technical scheme: in order to realize foregoing invention purpose, the technical solution adopted in the present invention is: Yi Zhongjian
Capacitive is preferable, the video distributing method of network interference resistance, picture synchronization, is mainly used in one-to-many video broadcasting scheme,
Said method comprising the steps of:
1, media file to be played is screened by video source server end, separates video, audio frequency, is distinguished as
Audio file enters audio decoder step, and adds not limit for length's queue, carries out local audio output.Video source service at present
Device end and multimedia play terminal user are at one and close in space, thus can share video source service with everybody
The audio amplifier of device end, i.e. audio file can everybody can synchronize to receive without network transmission；If media to be played are civilian
Part is distinguished as video file and then enters next step.
2, first video file is carried out video decoding.Being divided into two-way after video decoding, a road is directly in this locality
Play out, and the queue of a length of n when placement one is minimum on this path, the data i.e. having just enter into queue need to wait
After n unit of time, just can submit to backward, one time delay n of artificial generation, then carry out local video output.
Another road video flowing utilizes efficient video coding to recompile, and current general H264 encodes, also
H265 can be used to encode, and the compression efficiency of H265 coding exceeds one times than H264 coding.Current video file is big
It is all 1080P even more high-resolution, so in addition to using unified digital video coding to recompile, also
The video file of high level format demoted, to be downgraded to unified 720P form, according to the restriction of actual hardware,
480P and 320P can also be downgraded to.Thus can produce the video flowing in the range of single Video coding, fixing code stream,
Network transmission is carried out to multimedia play terminal.
3, after multimedia play terminal network receives, FEC error correction is first carried out, by Real-time Transport Protocol
The Slave pattern of jifferbuffer, time delay is set to n, and then multimedia play terminal plays out.
Further, in another road video flowing transmission of described step 2, subsidiary forward error correction coding (FEC),
Often K video stream network bag of transmission, uses forward error correction coding, produces O error correction packets, i.e. K+O constitutes a biography
Defeated window.
Yet further, multimedia play terminal, in one transmission window, receives K-bag in K,
Receive O-bag in O, after K-and O-quantity reaches baseline required by FEC algorithm, i.e. recover whole K video
Stream packets.
Beneficial effect: compared with prior art, it provides the benefit that the present invention:
1, the present invention is transmitted for different input videos, the video flowing producing unified specification.Thus regard
The network transfer rate of frequency stream stable in the range of, improve the transmission compatibility to network environment.Terminal only can receive simultaneously
To a kind of video flowing supporting specification, thus improve terminal transparency.
2, the video source server in the present invention is in the video flowing of transmission, adds certain redundant data and is used for
Loss of data in opposing transmission.Thus possess preferable network interference resistance ability, and then improve various network environments
Compatibility.
3, the present invention is when video source server end carries out local broadcasting, thinks addition one etc. before picture
Treat duration n, it is ensured that video source server end be consistent on the broadcasting pictures sense organ of multimedia play terminal.
Accompanying drawing explanation
Fig. 1 is the structural representation of video source server end of the present invention.
Detailed description of the invention
Below by a most preferred embodiment, the technical program is described in detail, but the guarantor of the present invention
The scope of protecting is not limited to described embodiment.
As shown in Figure 1: a kind of compatibility is preferable, the video distributing method of network interference resistance, picture synchronization,
It is mainly used in one-to-many video broadcasting scheme, as a example by the video file by 1080P is play below, is specifically described the present invention
Work process.
Media file to be played is screened by video source server end, separates video, audio frequency, isolated
Audio file enters audio decoder step, adds not limit for length's queue after decoding, then waits that synchronous point and local video synchronize
Directly carry out audio frequency output.Video source server end and multimedia play terminal share the audio amplifier of video source server end, i.e.
Audio file does not carry out network transmission；Isolated video file then enters next step.
First video file is carried out video decoding.Being divided into two-way after video decoding, a road is directly entered in this locality
Row is play, and the queue of a length of n when placement one is minimum on this path, and the data i.e. having just enter into queue need waiting n
After individual unit of time, just can submit to backward, one time delay n of artificial generation, then carry out local video output；Another road
Use H264 Video coding recompile, and to video file demote, be downgraded to unified 720P
Form, thus produce the video flowing in the range of single Video coding, fixing code stream.
And after video data encodes again, it is packaged into RTP bag by RTP pay process, adds and do not limit
Long queue, adds forward error correction (FEC) according to transmission window and sends to network.In transmission, this video flowing is subsidiary
Forward error correction coding (FEC), often K video stream network bag of transmission, use forward error correction coding, produce O error correction
Bag, i.e. K+O constitutes a transmission window.Multimedia play terminal, in one transmission window, receives K-in K
Individual bag, receives O-bag in O, after K-and O-quantity reaches baseline required by FEC algorithm, i.e. recovers whole K
Individual video streaming data packet, thus greatly reduces network transmission packet loss, the phenomenon that video playback card pauses.
After multimedia play terminal network receives, first carry out FEC error correction, by Real-time Transport Protocol
The Slave pattern of jifferbuffer, time delay is set to n, and then multimedia play terminal plays out.
The above is only the preferred embodiment of the present invention, it should be pointed out that: common for the art
For technical staff, under the premise without departing from the principles of the invention, it is also possible to make some improvements and modifications, these improve
Also protection scope of the present invention is should be regarded as with retouching.
Claims (3)
1. the video distributing method being applied to one-to-many video broadcasting, it is characterised in that: described method includes following
Step:
Media file to be played is screened by a, video source server end, separates video, audio frequency, is distinguished as audio frequency literary composition
Part enters audio decoder step, and adds not limit for length's queue, carries out local audio output, is distinguished as video file and then enters
Step b；
First b, video file carry out video decoding；
Being divided into two-way after the decoding of c, video, a road directly plays out in this locality, and places a minimum on this path
The queue of Shi Changwei n, i.e. has just enter into after the data of queue need waiting n unit of time, just can submit to backward, artificially
Produce a time delay n, then carry out local video output；Another road uses unified digital video coding again to compile
Code, and the video file of high level format is demoted, it is downgraded to unified 720P form, thus produces single regarding
Video flowing in the range of frequency coding, fixing code stream, carries out network transmission to multimedia play terminal；
After d, multimedia play terminal network receive, first carry out FEC error correction, by jifferbuffer in Real-time Transport Protocol
Slave pattern, time delay is set to n, and then multimedia play terminal plays out.
A kind of video distributing method being applied to one-to-many video broadcasting the most according to claim 1, its feature exists
In: in another road video flowing transmission of described step c, subsidiary forward error correction coding (FEC), often K video of transmission
Flow network bag, uses forward error correction coding, produces O error correction packets, i.e. K+O constitutes a transmission window.
A kind of video distributing method being applied to one-to-many video broadcasting the most according to claim 2, its feature exists
In: multimedia play terminal, in one transmission window, receives K-bag in K, receives O-bag, K-in O
After reaching baseline required by FEC algorithm with O-quantity, i.e. recover whole K video streaming data packet.
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| CN201310412375.4A CN103491333B (en) | 2013-09-11 | 2013-09-11 | A kind of video distributing method being applied to one-to-many video broadcasting |
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| CN201310412375.4A CN103491333B (en) | 2013-09-11 | 2013-09-11 | A kind of video distributing method being applied to one-to-many video broadcasting |
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| CN103491333B true CN103491333B (en) | 2017-01-04 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105657467A (en) * | 2015-12-30 | 2016-06-08 | 深圳市讯方技术股份有限公司 | Stream media file control method and system based on cloud desktop |
| CN105959778B (en) * | 2016-04-29 | 2019-06-11 | 广州视睿电子科技有限公司 | Multimedia file sharing method and device |
| CN111726669B (en) * | 2019-03-18 | 2022-12-23 | 浙江宇视科技有限公司 | Distributed decoding equipment and audio and video synchronization method thereof |
| CN115314731B (en) * | 2022-06-23 | 2024-06-25 | 浙江大华技术股份有限公司 | Video processing system, method, computer device, and storage medium |
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| CN101083718A (en) * | 2006-05-31 | 2007-12-05 | 北京汉辰科技有限公司 | LCD terminal information publish platform system |
| CN200997661Y (en) * | 2007-01-24 | 2007-12-26 | 赵季伟 | Decoder/encoder composite combined engineering apparatus |
| CN102572547A (en) * | 2010-12-15 | 2012-07-11 | 中兴通讯股份有限公司 | Synchronous method, synchronous device and terminal for quickly accessing into multicast group |
| CN102802024A (en) * | 2012-08-28 | 2012-11-28 | 曙光信息产业(北京)有限公司 | Transcoding method and transcoding system realized in server |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US8311101B2 (en) * | 2008-02-28 | 2012-11-13 | Lsi Corporation | Rate control for real time transcoding of subtitles for application with limited memory |
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| CN101083718A (en) * | 2006-05-31 | 2007-12-05 | 北京汉辰科技有限公司 | LCD terminal information publish platform system |
| CN200997661Y (en) * | 2007-01-24 | 2007-12-26 | 赵季伟 | Decoder/encoder composite combined engineering apparatus |
| CN102572547A (en) * | 2010-12-15 | 2012-07-11 | 中兴通讯股份有限公司 | Synchronous method, synchronous device and terminal for quickly accessing into multicast group |
| CN102802024A (en) * | 2012-08-28 | 2012-11-28 | 曙光信息产业(北京)有限公司 | Transcoding method and transcoding system realized in server |
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Inventor after: Zhang Fuxin Inventor after: Wang Rui Inventor after: Wei Hairui Inventor after: Wu Shaogang Inventor before: Zhang Fuxin Inventor before: Chen Jie Inventor before: Wang Rui Inventor before: Wu Shaogang Inventor before: Zhang Bin Inventor before: Yan Hua |
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Effective date of registration: 20170606 Address after: 215500 Changshou City, Jiangsu Province, Dream Road, No., No. 8 Patentee after: Jiangsu Aerospace dragon dream Information Technology Co., Ltd. Address before: 215500 Jiangsu city of Suzhou province Changshou City Yushan Town Menglan Village Patentee before: Jiangsu Lemote Technology Corporation Limited |