CN107484009A - A kind of flow media playing method and device suitable for network direct broadcasting - Google Patents
A kind of flow media playing method and device suitable for network direct broadcasting Download PDFInfo
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- CN107484009A CN107484009A CN201710818019.0A CN201710818019A CN107484009A CN 107484009 A CN107484009 A CN 107484009A CN 201710818019 A CN201710818019 A CN 201710818019A CN 107484009 A CN107484009 A CN 107484009A
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/433—Content storage operation, e.g. storage operation in response to a pause request, caching operations
- H04N21/4331—Caching operations, e.g. of an advertisement for later insertion during playback
-
- 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
- H04N21/4302—Content synchronisation processes, e.g. decoder synchronisation
- H04N21/4307—Synchronising the rendering of multiple content streams or additional data on devices, e.g. synchronisation of audio on a mobile phone with the video output on the TV screen
-
- 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
- H04N21/439—Processing of audio elementary streams
-
- 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
- H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs
- H04N21/4402—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display
- H04N21/440281—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display by altering the temporal resolution, e.g. by frame skipping
Abstract
A kind of flow media playing method suitable for network direct broadcasting, received in the playback terminal of Streaming Media and play flow data in real time, de-packaging operation is carried out to the network packet received, and do caching process；Audio and video buffer data in network packet are checked, analysis extraction can be used for the parameter of audio playback rate control；Video data in audio and video buffer data is extracted, carries out video decoding, video sampling data is obtained and is shown for video；Audio and video buffer data sound intermediate frequency data are extracted, carry out audio decoder, audio sampling data is obtained, speed Control is done to audio according to the audio playback rate control parameter of acquisition, and play the audio sampling data after speed change；Audio is played and video shows and synchronizes processing.
Description
Technical field
The invention belongs to Internet technical field, more particularly to a kind of flow media playing method suitable for network direct broadcasting and
Device.
Background technology
It is live be a kind of real-time, it is interactive significantly by the media format of transmission on Internet content.At present, China
Mobile phone netizen's quantity has reached 6.56 hundred million, and the popularization of smart mobile phone, the standard configuration of smart mobile phone high-definition camera, 4G+Wifi are high
The access of fast network, the development of these technologies promote live quick outburst, make it is live want to broadcast whenever and wherever possible just broadcast, want to see just regard as
May.And under live scene, streaming media playing is different from local broadcasting, is influenceed by net network environment, inevitably exists
Play interim card problem.What it is due to broadcasting is real-time streams, therefore can have the problem of delay and interim card.Interim card and the shadow each other that is delayed
Ring, but it is conflicting, and it is also due to caused by shake of the real-time streams in playing process on network line to trace it to its cause.Fig. 1 is
Existing audio and video playing flow chart.
Generally playing interim card can be alleviated by increasing network data buffering area, but this solution method can increase broadcasting
Delay.And broadcast time-delay can solve by chasing after the method for frame, but so be made in network condition it is bad in the case of and can make
Into obvious interim card.
The content of the invention
The present invention provides a kind of flow media playing method and device suitable for network direct broadcasting, to solve in network direct broadcasting
The problem of streaming media playing interim card and delay.
A kind of flow media playing method suitable for network direct broadcasting, this method comprise the following steps：
Received in the playback terminal of Streaming Media and play flow data in real time, unpacking behaviour is carried out to the network packet received
Make, and do caching process；
Audio and video buffer data in network packet are checked, analysis extraction can be used for the parameter of audio playback rate control；
Video data in audio and video buffer data is extracted, carries out video decoding, video sampling data is obtained and is used for video
Display；
Audio and video buffer data sound intermediate frequency data are extracted, carry out audio decoder, audio sampling data are obtained, according to acquisition
Audio playback rate control parameter does speed Control to audio, and plays the audio sampling data after speed change；
Audio is played and video shows and synchronizes processing.
It is described shifting control method is done to audio to be：
If Streaming Media current playing rate is 1.0f, f refers to normal play speed；
Current video data buffering duration and voice data buffering duration are calculated, compares video data buffering duration and audio
Data buffering duration；
A length of K during larger buffering in selecting video data buffering duration and voice data buffering duration, if K>M, M are default
Duration, then current playing rate is improved, otherwise selecting video data buffering duration and voice data buffering duration in it is smaller
A length of K, then judges during buffering
If K<N, N are default duration, N<M, then current playing rate is reduced, otherwise current playing rate is constant；
Audio is played according to the playback rate after adjustment.
Further, a length of K when selecting video data buffering duration and voice data buffer larger buffering in duration, if K>
M, the M=10 second, then current playing rate is adjusted to 1.2f, when otherwise selecting video data buffering duration and voice data buffer
A length of K, then judges when in length compared with minibuffer
If K<N, the N=3 second, then current playing rate is adjusted to 0.85f, otherwise current playing rate is constant.
A kind of streaming medium playing device suitable for network direct broadcasting, described device include memory；And
It is coupled to the processor of the memory, the processor is configured as performing the journey being stored in the memory
Sequence, operate below the computing device：
Receiving stream media plays flow data in real time, carries out de-packaging operation to the network packet received, and do at caching
Reason；
Audio and video buffer data in network packet are checked, analysis extraction can be used for the parameter of audio playback rate control；
Video data in audio and video buffer data is extracted, carries out video decoding, video sampling data is obtained and is used for video
Display；
Audio and video buffer data sound intermediate frequency data are extracted, carry out audio decoder, audio sampling data are obtained, according to acquisition
Audio playback rate control parameter does speed Control to audio, and plays the audio sampling data after speed change；
Audio is played and video shows and synchronizes processing.
It is described audio is done speed Control operation be：
If Streaming Media current playing rate is 1.0f；
Current video data buffering duration and voice data buffering duration are calculated, compares video data buffering duration and audio
Data buffering duration；
A length of K during larger buffering in selecting video data buffering duration and voice data buffering duration, if K>M, M are default
Duration, then current playing rate is improved, otherwise selecting video data buffering duration and voice data buffering duration in it is smaller
A length of K, then judges during buffering
If K<N, N are default duration, N<M, then current playing rate is reduced, otherwise current playing rate is constant；
Audio is played according to the playback rate after adjustment.
Further, a length of K when selecting video data buffering duration and voice data buffer larger buffering in duration, if K>
M, the M=10 second, then current playing rate is adjusted to 1.2f, when otherwise selecting video data buffering duration and voice data buffer
A length of K, then judges when in length compared with minibuffer
If K<N, the N=3 second, then current playing rate is adjusted to 0.85f, otherwise current playing rate is constant.
The present invention solves the problems, such as delay and interim card under live scene using the method for variable playback, passes through client terminal playing
Device dynamically adjusts audio and video playing speed in playing process, come interim card and delay caused by balancing network fluctuation, obtains preferable
Consumer's Experience effect.
Brief description of the drawings
Detailed description below, above-mentioned and other mesh of exemplary embodiment of the invention are read by reference to accompanying drawing
, feature and advantage will become prone to understand.In the accompanying drawings, if showing the present invention's by way of example, and not by way of limitation
Dry embodiment, wherein：
Fig. 1 is existing player plays schematic flow sheet.
Fig. 2 is the streaming media playing schematic flow sheet of the present invention.
Fig. 3 is streamed audio speed Control schematic flow sheet in the embodiment of the present invention.
Embodiment
As shown in Fig. 2 the flow media playing method suitable for network direct broadcasting of the present invention, this method comprise the following steps：
Received in the playback terminal of Streaming Media and play flow data in real time, unpacking behaviour is carried out to the network packet received
Make, and do caching process；
Audio and video buffer data in network packet are checked, analysis extraction can be used for the parameter of audio playback rate control；
Video data in audio and video buffer data is extracted, carries out video decoding, video sampling data is obtained and is used for video
Display；
Audio and video buffer data sound intermediate frequency data are extracted, carry out audio decoder, audio sampling data are obtained, according to acquisition
Audio playback rate control parameter does speed Control to audio, and plays the audio sampling data after speed change；
Audio is played and video shows and synchronizes processing.
As shown in figure 3, by taking IJK players of increasing income as an example, the speed control of delay and interim card is balanced by variable playback
Algorithm flow chart.When buffering more generation delay, playback rate is improved to alleviate delay；When buffering less generation interim card,
Playback rate is reduced to reduce interim card probability.
It is described shifting control method is done to audio to be：
If Streaming Media current playing rate is 1.0f；
Current video data buffering duration and voice data buffering duration are calculated, compares video data buffering duration and audio
Data buffering duration；
A length of K during larger buffering in selecting video data buffering duration and voice data buffering duration, if K>M, M=10
Second, then current playing rate is adjusted to 1.2f, otherwise selecting video data buffering duration and voice data buffering duration in compared with
A length of K, then judges during minibuffer
If K<N, the N=3 second, then current playing rate is adjusted to 0.85f, otherwise current playing rate is constant；
Audio is played according to the playback rate after adjustment.
Solution of the present invention for interim card and delay can determine parameter according to Consumer's Experience on line.According to test experience,
Locally buffered data are defined as being delayed more than 8s, improve player plays speed.Locally buffered data define less than 3.5s
For interim card may occur, player plays speed is reduced.The present invention finally ensures buffered data stable convergence between 4~8s,
Interim card and the contradiction of delay are preferably balanced,
When the audio after playing speed change, audio speed changing, which plays, to be needed to use audio speed changing algorithm.
Audio speed changing algorithm refers to changing speed of sound invariable tone, i.e. voice duration is regular, refers to the sound for not changing former speaker
Tune and semantic information, only change the word speed of speaker.Audio speed changing algorithm has many kinds, such as may be referred to Ffmpeg generations of increasing income
Realized in code based on the audio filter of WSOLA algorithms：
https://github.com/FFmpeg/FFmpeg/blob/master/libavfilter/af_atempo.c
This is a kind of way of realization of overlapping superposition algorithm in audio speed changing algorithm.Principle is the time domain from input audio stream
For the sample information of space replicating original to the audio stream of output, this duplication, which operates, enters the crude sampling information for inputting audio stream
The overlapping filling of row.For WSOLA algorithms as a kind of audio speed changing algorithm, purpose is also to realize that audio plays speed-variation sound.Audio
Becoming the short-cut counting method has many kinds, and WSOLA is one of which.As an example, it is therefore an objective to realized with the method for audio speed changing
The variable playback of player
The identifying code of sound intermediate frequency speed Control of the present invention is as follows：
What deserves to be explained is although foregoing teachings describe the essence of the invention by reference to some embodiments
God and principle, it should be appreciated that, the present invention is not limited to disclosed embodiment, the also unawareness of the division to each side
The feature that taste in these aspects can not combine, and this division is merely to the convenience of statement.It is contemplated that cover appended power
Included various modifications and equivalent arrangements in the spirit and scope that profit requires.
Claims (6)
1. a kind of flow media playing method suitable for network direct broadcasting, it is characterised in that this method comprises the following steps：
Received in the playback terminal of Streaming Media and play flow data in real time, de-packaging operation is carried out to the network packet received, and
Do caching process；
Audio and video buffer data in network packet are checked, analysis extraction can be used for the parameter of audio playback rate control；
Video data in audio and video buffer data is extracted, carries out video decoding, video sampling data is obtained and is shown for video；
Audio and video buffer data sound intermediate frequency data are extracted, carry out audio decoder, audio sampling data are obtained, according to the audio of acquisition
Playback rate control parameter does speed Control to audio, and plays the audio sampling data after speed change；
Audio is played and video shows and synchronizes processing.
2. it is applied to the flow media playing method of network direct broadcasting as claimed in claim 1, it is characterised in that described done to audio becomes
Speed control method is：
If Streaming Media current playing rate is 1.0f, f refers to normal play speed；
Current video data buffering duration and voice data buffering duration are calculated, compares video data buffering duration and voice data
Buffer duration；
A length of K during larger buffering in selecting video data buffering duration and voice data buffering duration, if K>When M, M are default
It is long, then current playing rate is improved, otherwise selecting video data buffering duration and voice data are buffered in duration compared with minibuffer
Shi Changwei K, then judge
If K<N, N are default duration, N<M, then current playing rate is reduced, otherwise current playing rate is constant；
Audio is played according to the playback rate after adjustment.
3. it is applied to the flow media playing method of network direct broadcasting as claimed in claim 2, it is characterised in that
A length of K during larger buffering in selecting video data buffering duration and voice data buffering duration, if K>M, the M=10 second, then
Current playing rate is adjusted to 1.2f, otherwise selecting video data buffering duration and voice data are buffered in duration compared with minibuffer
Shi Changwei K, then judge
If K<N, the N=3 second, then current playing rate is adjusted to 0.85f, otherwise current playing rate is constant.
4. a kind of streaming medium playing device suitable for network direct broadcasting, it is characterised in that described device includes memory；And
It is coupled to the processor of the memory, the processor is configured as performing the program being stored in the memory, the place
Manage device and perform following operate：
Receiving stream media plays flow data in real time, carries out de-packaging operation to the network packet received, and do caching process；
Audio and video buffer data in network packet are checked, analysis extraction can be used for the parameter of audio playback rate control；
Video data in audio and video buffer data is extracted, carries out video decoding, video sampling data is obtained and is shown for video；
Audio and video buffer data sound intermediate frequency data are extracted, carry out audio decoder, audio sampling data are obtained, according to the audio of acquisition
Playback rate control parameter does speed Control to audio, and plays the audio sampling data after speed change；
Audio is played and video shows and synchronizes processing.
5. it is applied to the streaming medium playing device of network direct broadcasting as claimed in claim 4, it is characterised in that described done to audio becomes
Fast control operation is：
If Streaming Media current playing rate is 1.0f；
Current video data buffering duration and voice data buffering duration are calculated, compares video data buffering duration and voice data
Buffer duration；
A length of K during larger buffering in selecting video data buffering duration and voice data buffering duration, if K>When M, M are default
It is long, then current playing rate is improved, otherwise selecting video data buffering duration and voice data are buffered in duration compared with minibuffer
Shi Changwei K, then judge
If K<N, N are default duration, N<M, then current playing rate is reduced, otherwise current playing rate is constant；
Audio is played according to the playback rate after adjustment.
6. it is applied to the streaming medium playing device of network direct broadcasting as claimed in claim 5, it is characterised in that
A length of K during larger buffering in selecting video data buffering duration and voice data buffering duration, if K>M, the M=10 second, then
Current playing rate is adjusted to 1.2f, otherwise selecting video data buffering duration and voice data are buffered in duration compared with minibuffer
Shi Changwei K, then judge
If K<N, the N=3 second, then current playing rate is adjusted to 0.85f, otherwise current playing rate is constant.
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| CN201710818019.0A CN107484009A (en) | 2017-09-12 | 2017-09-12 | A kind of flow media playing method and device suitable for network direct broadcasting |
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| CN201710818019.0A CN107484009A (en) | 2017-09-12 | 2017-09-12 | A kind of flow media playing method and device suitable for network direct broadcasting |
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Family
ID=60584862
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| CN201710818019.0A Pending CN107484009A (en) | 2017-09-12 | 2017-09-12 | A kind of flow media playing method and device suitable for network direct broadcasting |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108366299A (en) * | 2018-03-29 | 2018-08-03 | 上海七牛信息技术有限公司 | A kind of media playing method and device |
| CN108540855A (en) * | 2018-04-18 | 2018-09-14 | 王健 | A kind of adaptive low delay streaming media playing software suitable under network direct broadcasting scene |
| CN108712658A (en) * | 2018-05-15 | 2018-10-26 | 安徽天卓信息技术有限公司 | Sound screen delay adjustment system is played based on BS structural networks live streaming user terminal |
| CN109194975A (en) * | 2018-11-02 | 2019-01-11 | 深圳市云威物联科技有限公司 | Audio-video live streaming chases after stream method and device |
| CN109963184A (en) * | 2017-12-14 | 2019-07-02 | 阿里巴巴集团控股有限公司 | A kind of method, apparatus and electronic equipment of audio-video network broadcasting |
| CN111294634A (en) * | 2020-02-27 | 2020-06-16 | 腾讯科技（深圳）有限公司 | Live broadcast method, device, system, equipment and computer readable storage medium |
| CN112562719A (en) * | 2020-11-30 | 2021-03-26 | 清华珠三角研究院 | Method, system, device and storage medium for matching synthesized voice and original video |
| CN113727186A (en) * | 2021-08-26 | 2021-11-30 | 百果园技术(新加坡)有限公司 | Video playing method and system for real-time video call |
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| CN112562719A (en) * | 2020-11-30 | 2021-03-26 | 清华珠三角研究院 | Method, system, device and storage medium for matching synthesized voice and original video |
| CN112562719B (en) * | 2020-11-30 | 2024-03-19 | 清华珠三角研究院 | Method, system, device and storage medium for matching synthesized voice with original video |
| CN113727186A (en) * | 2021-08-26 | 2021-11-30 | 百果园技术(新加坡)有限公司 | Video playing method and system for real-time video call |
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Application publication date: 20171215 |