CN106911950A - A kind of video synchronization method and system - Google Patents
A kind of video synchronization method and system Download PDFInfo
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- CN106911950A CN106911950A CN201510978990.0A CN201510978990A CN106911950A CN 106911950 A CN106911950 A CN 106911950A CN 201510978990 A CN201510978990 A CN 201510978990A CN 106911950 A CN106911950 A CN 106911950A
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- slave
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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
- H04N21/4302—Content synchronisation processes, e.g. decoder synchronisation
- H04N21/4305—Synchronising client clock from received content stream, e.g. locking decoder clock with encoder clock, extraction of the PCR packets
-
- 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
- H04N21/436—Interfacing a local distribution network, e.g. communicating with another STB or one or more peripheral devices inside the home
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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]
- H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
- H04N21/85—Assembly of content; Generation of multimedia applications
- H04N21/854—Content authoring
- H04N21/8547—Content authoring involving timestamps for synchronizing content
Abstract
The present invention discloses a kind of video synchronization method and system, and wherein method comprises the following steps：Main frame sets up communication connection with slave；Main frame sends video or video address to slave；Slave receives video or video address and plays video；Main frame plays video and sends the host time label of current video broadcasting to slave；Slave Receiving Host time tag simultaneously adjusts slave video playback progress according to host time label.It is different from prior art, the technical program can adjust playing progress rate by comparing time tag, slave according to time tag, reaches that slave playing progress rate is synchronous with main frame playing progress rate, so as to reaches the purpose of slave audio video synchronization.
Description
Technical field
Field, more particularly to a kind of video synchronization method and system are played the present invention relates to audio video synchronization.
Background technology
Same video is synchronously played on two or many hardware devices, be replicated using hardware more or same
When same video is played to solve, it is in direct one-to-two output same frame that wherein hardware replicates one kind
Hold, display source, not exclusively video content are switched when needed, overlay thereon is；Separately
One kind is by chip Real-time Collection and exports on another screen；Both of which has respective defect,
The overlay of different demands cannot be for example superimposed on respective screen, hardware cost etc. is increased.Using
A method for video is played simultaneously, and the two driving hardware of screen (such as Set Top Box) independent play-outs are same
One program source, synchronous effect may can be reached when hardware load is relatively low, once certain is hard
The load of part rises, and interim card occurs in broadcasting, and the playing progress rate on both sides will no longer be synchronized；And if central
There are more pause, recovery operation, also easily lead to both sides and play asynchronous.
The content of the invention
For this reason, it may be necessary to provide a kind of video synchronization method and system, existing two equipment or many equipment are solved
Between the nonsynchronous problem of video.
To achieve the above object, a kind of video synchronization method is inventor provided, main frame and slave is applied to
Between, comprise the following steps：
Main frame sets up communication connection with slave；
Main frame sends video or video address to slave；
Slave receives video or video address and plays video；
Main frame plays video and sends the host time label of current video broadcasting to slave；
Slave Receiving Host time tag simultaneously adjusts slave video playback progress according to host time label.
Further, step " slave adjusts slave video playback progress according to host time label " includes
Following steps：
Slave judge host time label and the slave time tag of current slave video playback difference whether
More than preset value；
If it is, slave adjusts slave video playback progress to host time label, and continue broadcasting and regard
Frequently；
Otherwise, slave continues to play video.
Further, also comprise the following steps：
Main frame receives Broadcast Control order；
Main frame changes main frame broadcast state and sends Broadcast Control order to slave according to Broadcast Control order；
Slave receives Broadcast Control order and changes slave broadcast state according to Broadcast Control order.
Further, step " slave adjustment slave video playback progress " comprises the following steps：
Slave sets host time label and decodes storehouse to the video of slave.
And the present invention also provides a kind of video synchronizing system, including main frame and slave, main frame is built with slave
Erect communication connection,
Main frame includes video sending module, host video playing module, time tag sending module；
Slave includes video reception module, slave video playback module, time tag receiver module, broadcasting
Progress adjustment module；
Wherein：
Video sending module is used to send video or video address to slave；
Video reception module is used to receive video or video address；
Slave video playback module is used for according to video or video address and plays video；
Host video playing module is used for main frame and plays video；
Time tag sending module is used to send the host time label of current video broadcasting to slave；
Time tag receiver module is used for Receiving Host time tag；
Playing progress rate adjusting module is used to adjust slave video playback progress according to host time label.
Further, playing progress rate adjusting module is additionally operable to judge host time label with current slave video
Whether the difference of the slave time tag of broadcasting is more than preset value；
If it is, adjustment slave video playback progress is to host time label, and continue to play video；
Otherwise, continue to play video.
Further, main frame includes Host Command receiver module, Host Command respond module, Host Command
Forwarding module；
Slave includes slave machine order receiver module, slave machine order respond module；
Host Command receiver module is used for main frame and receives Broadcast Control order；
Host Command respond module is used to change main frame broadcast state according to Broadcast Control order；
Host Command forwarding module is used to send Broadcast Control order to slave；
Slave machine order receiver module is used for slave and receives Broadcast Control order；
Slave machine order respond module is used to change slave broadcast state according to Broadcast Control order.
Further, playing progress rate adjusting module is additionally operable to set host time label to the video solution of slave
Code storehouse.
Prior art is different from, above-mentioned technical proposal sends video or video address by main frame to slave,
Can cause that the content that slave is played is identical with main frame.Main frame sends time tag to slave simultaneously,
Slave is by comparing time tag, you can adjusts slave playing progress rate with according to time tag, reaches slave
Playing progress rate is synchronous with main frame playing progress rate, simultaneously because the content that slave is played is identical, then
Reach the purpose of slave audio video synchronization.Slave of the invention can be further by judging time tag
It is no that more than preset value, so as to determine currently playing progress, whether difference is excessive with main frame playing progress rate,
Just further adjusted when difference is excessive, so on the basis of audio video synchronization, overfrequency can be avoided again
Slave playing progress rate is adjusted numerously and influences user to watch impression, while also avoiding excessively consuming slave treatment
Resource.
Brief description of the drawings
Fig. 1 is the method flow diagram of an embodiment of the present invention；
Fig. 2 is the system structure diagram of a real-time mode of the invention.
Description of reference numerals：
200th, main frame,
201st, main frame includes video sending module, 202, host video playing module,
203rd, time tag sending module, 204, Host Command receiver module,
205th, Host Command respond module, 206, Host Command forwarding module,
210th, slave,
211st, slave includes video reception module, 212, slave video playback module,
213rd, time tag receiver module, 214, playing progress rate adjusting module；
215th, slave machine order receiver module, 216, slave machine order respond module.
Specific embodiment
To describe technology contents, structural feature, the objects and the effects of technical scheme in detail, below
In conjunction with specific embodiments and accompanying drawing is coordinated to be explained in detail.
Refer to Fig. 1 to Fig. 2, the present embodiment provides a kind of video synchronization method first, be applied to main frame and
Between slave, main frame and slave in the present invention can be two electronic equipments, such as Set Top Box.Main frame and from
Machine all includes the communication module for setting up communication connection, can be wire communication module or wireless
Communication module, and slave can play video.Specifically, this method comprises the following steps：Step
S101 main frames set up communication connection with slave, and slave can be with direct communication according to communication connection.Then
Video or video address are sent to slave in step S102 main frames.Video is video file, and such as storage is in master
Video file on machine memory.Video address can be that video network address or video share address etc.,
The video source of video network address can be that on internet, the video source of the shared address of video can be office
In the network server of domain, main frame or slave can get corresponding video according to video address.
In step S112, slave receives video or video address and plays video.If slave is received
Be video, can be put into video data bag in Video Decoder and decode and play by slave, if slave
What is received is video address, and slave can be from obtaining video and be put into Video Decoder on video address
Decode and play.Now main frame will also play video in step s 103.Especially it is noted that main frame
The opportunity for playing video can be it is arbitrary, can before step S102 or in step s 103,
As long as before host time label is sent.Main frame sends what current video was played in step s 103
Host time label is to slave.Wherein, time tag is that pts (is the letter of Presentation time-stamp
Claim, represent Presentation Time Stamp), the progression time that time tag correspondence current video is played, time tag
Can be transmitted by above-mentioned communication connection.
After main frame sends host time label, into step S113 slave Receiving Host time tags.Then
Slave video playback progress is adjusted into step S114 and according to host time label.Step S114 is adjusted
Purpose be so that slave video playback time tag and host time label can it is consistent so that realize lead
Machine playing progress rate is synchronous with slave playing progress rate.
In step S114, slave adjusts slave video playback progress according to host time label has various tools
The implementation method of body, such as after slave receives host time label every time, just with host time label more
The playing progress rate of new slave, can so reach synchronous purpose, but presence needs more to consume at slave
Manage the problem of resource.And in certain embodiments, step S114 may include steps of：Slave judges
Whether host time label is more than preset value with the difference of the slave time tag of current slave video playback；
If it is, slave adjusts slave video playback progress to host time label, and continue to play video；
Otherwise, slave continues to play video.First judged before playing progress rate is updated, if the time difference
Away from smaller, less than preset value (such as 1ms or 10ms), then it is assumed that be synchronous, then do not play out
The action that progress updates, continues to play video.And if gap is larger, then it is assumed that it is asynchronous, then
Play out progress and update progress so that playing progress rate synchronization.So it is poor away from when, it is allowed to have one
Fixed small difference, but without frequently setting very much pts, then the synchronous effect of slave can be reached,
Caton phenomenon will not occur because of how frequently playing progress rate is updated again.Certainly, main frame can be at interval of
After one regular time, a host time label is just sent, to ensure the master in whole playing process
Slave playing progress rate synchronization.
In certain embodiments, user can play out control to the video display process of main frame, so that
Broadcast state can be changed, such as suspended, played, stopping playing control.In order to realize slave with
Main frame identical broadcast state, then also comprise the following steps：Step S104 main frames receive Broadcast Control order.Broadcast
Control is ordered and plays control command, and user can trigger Broadcast Control order by clicking on broadcasting control button, then
Main frame can receive Broadcast Control order.Then step S105 main frames change main frame broadcasting shape according to Broadcast Control order
State simultaneously sends Broadcast Control order to slave, and Broadcast Control order again may be by communication connection and be transmitted.Then
Step S115 slaves receive Broadcast Control order and change slave broadcast state according to Broadcast Control order in step S116.
So, after user clicks on pause at main frame, the playing progress rate of main frame can suspend, meanwhile, slave also can
Suspend playing progress rate after receiving broadcasting control, realize the synchronization of playing progress rate.
The mode of slave adjustment playing progress rate can have various in the present invention, such as can directly F.F. or fast
Fall back at host time label, such user seems to be unlikely to interim card.Or in certain embodiments,
Step " slave adjustment slave video playback progress " comprises the following steps：Slave sets host time label
Video to slave decodes storehouse, and the playing progress rate of such slave can quickly be adjusted to consistent with main frame.
To be below the embodiment of video and send is the embodiment of video address to the present invention with what is sent
It is further detailed.
Send be video embodiment in, slave can be Set Top Box, have two identicals can be only
The SoC hardware of vertical operation,, used as main frame, another is used as slave for one of them.Comprise the following steps that：
1. when the respective player of slave is initialized in addition to initializing player parameter, main frame is additionally initial
Change a link communicated with slave, that is, set up communication connection.
2. main frame reads the program data of video during player plays, and program data is sent into slave,
And the bottom decoding storehouse of oneself is sent to, video playback is realized on main frame.
3. after slave receives the program data that main frame is sent, the bottom decoding storehouse of oneself is sent to, is decoded simultaneously
Play.
4. main frame obtains the pts information of current hosts by another thread, and the pts information of main frame is sent out
Give slave.
5. slave receives the pts that main frame is sent, compared with the pts of oneself, think if gap is larger from
Machine is asynchronous with main frame, and the pts that will now receive is set to the decoding storehouse of oneself, and both can be synchronous.
6. after the player of main frame receives Broadcast Control order, Broadcast Control order is sent to slave, and change accordingly
Become the broadcast state of oneself.
7. after slave receives the Broadcast Control order of main frame, directly follow-up Broadcast Control order changes the broadcast state of oneself,
Can reach and main frame identical state.
Send be video address embodiment in, the program source of slave as main frame, each to clothes
Business device asks same program source, and this program source is the corresponding video of video address, is comprised the following steps：
1. when the respective player of slave is initialized in addition to initializing player parameter, main frame is additionally initial
Change a link communicated with slave, that is, set up communication connection.
2. play start when main frame according to video address to server request program source, while send messages to from
Machine, tells the address of slave program source.
3 slaves receive the program source address that main frame is sent, to server request data.
4. after slave each receives program data, data are sent to respective bottom decoding storehouse, according to video
Address carries out video playback.
5. main frame obtains the pts information of current hosts by another thread, and the pts information of main frame is sent out
Give slave.
6. slave receives the pts that main frame is sent, compared with the pts of oneself, think if gap is larger from
Machine is asynchronous with main frame, and the pts that will now receive is set to the decoding storehouse of oneself, and both can be synchronous.
7. after the player of main frame receives Broadcast Control order, slave is sent commands to, and changed accordingly certainly
Oneself broadcast state.
8. after slave receives the Broadcast Control order of main frame, directly follow-up order changes the broadcast state of oneself, you can
Reach and main frame identical state.
And the present invention also provides a kind of video synchronizing system, as shown in Fig. 2 including main frame 200 and from
Machine 210, main frame sets up communication connection with slave, and main frame includes video sending module 201, host video
Playing module 202, time tag sending module 203；Slave is regarded including video reception module 211, slave
Frequency playing module 212, time tag receiver module 213, playing progress rate adjusting module 214.
Wherein：Video sending module is used to send video or video address to slave；Video reception module is used
In reception video or video address；Slave video playback module is used for according to video or video address and plays
Video；Host video playing module is used for main frame and plays video；Time tag sending module is used to send works as
The host time label of preceding video playback is to slave；Time tag receiver module is marked for the Receiving Host time
Sign；Playing progress rate adjusting module is used to adjust slave video playback progress according to host time label so that
Slave time tag is consistent with slave time tag, that is, realize the video playback progress one of main frame and slave
Cause, realize the synchronization of broadcasting.In certain embodiments, the time tag of main frame can be network delay
Time and the sum of video playback time label, can cause the synchronous more accurate of slave.Network delay
Time can by obtaining slave between after ping time delays except being obtained in two.
In certain embodiments, playing progress rate adjusting module be additionally operable to judge host time label with currently from
Whether the difference of the slave time tag of machine video playback is more than preset value；If it is, adjustment slave is regarded
Frequency playing progress rate continues to play video to host time label；Otherwise, continue to play video.So
Process resource can be saved without frequent updating playing progress rate.
In order to realize play control synchronization, further, main frame include Host Command receiver module 204,
Host Command respond module 205, Host Command forwarding module 206；Slave includes slave machine order receiver module
215th, slave machine order respond module 216；Host Command receiver module is used for main frame and receives Broadcast Control order；It is main
Machine command response module is used to change main frame broadcast state according to Broadcast Control order；Host Command forwarding module is used
In transmission Broadcast Control order to slave；Slave machine order receiver module is used for slave and receives Broadcast Control order；Slave is ordered
Respond module is made for changing slave broadcast state according to Broadcast Control order.
As a kind of alternative embodiment, playing progress rate adjusting module be additionally operable to set host time label to from
The video decoding storehouse of machine, it is to change over main frame that host time label is set to video decoding storehouse rear video progress
Time tag.
It should be noted that herein, such as first and second or the like relational terms are used merely to
One entity or operation are made a distinction with another entity or operation, and is not necessarily required or is implied
There is any this actual relation or order between these entities or operation.And, term " including ",
"comprising" or any other variant thereof is intended to cover non-exclusive inclusion, so that being including one
The process of row key element, method, article or terminal device not only include those key elements, but also including not having
There are other key elements being expressly recited, or also include being set for this process, method, article or terminal
Standby intrinsic key element.In the absence of more restrictions, by sentence " including ... " or " including ... "
The key element of restriction, it is not excluded that in the process including the key element, method, article or terminal device
Also there is other key element.Additionally, herein, " being more than ", " being less than ", " exceeding " etc. are interpreted as not
Including this number；" more than ", " below ", " within " etc. be interpreted as including this number.
It should be understood by those skilled in the art that, the various embodiments described above can be provided as method, device or meter
Calculation machine program product.These embodiments can be using complete hardware embodiment, complete software embodiment or knot
Close the form of the embodiment in terms of software and hardware.Whole or portion in the method that the various embodiments described above are related to
The hardware of correlation can be instructed step by step to complete by program, described program can be stored in calculating
In the storage medium that machine equipment can read, for performing all or part described in the various embodiments described above method
Step.The computer equipment, including but not limited to：Personal computer, server, all-purpose computer,
Special-purpose computer, the network equipment, embedded device, programmable device, intelligent mobile terminal, intelligent family
Occupy equipment, wearable intelligent equipment, vehicle intelligent equipment etc.；Described storage medium, including but do not limit
In：RAM, ROM, magnetic disc, tape, CD, flash memory, USB flash disk, mobile hard disk, storage card, note
Recall rod, webserver storage, network cloud storage etc..
The various embodiments described above are with reference to the method according to embodiment, equipment (system) and computer program
The flow chart and/or block diagram of product is described.It should be understood that flow can be realized by computer program instructions
Each flow in figure and/or block diagram and/or the stream in square frame and flow chart and/or block diagram
The combination of journey and/or square frame.Can provide these computer program instructions to computer equipment processor with
Produce a machine so that produce for realizing in stream by the instruction of the computing device of computer equipment
The function of being specified in one flow of journey figure or multiple one square frame of flow and/or block diagram or multiple square frames
Device.
These computer program instructions may be alternatively stored in the meter that computer equipment can be guided to work in a specific way
In calculation machine equipment readable memory so that instruction of the storage in the computer equipment readable memory is produced
Manufacture including command device, the command device realize one flow of flow chart or multiple flow and/
Or the function of being specified in one square frame of block diagram or multiple square frames.
These computer program instructions can be also loaded on computer equipment so that held on a computing device
Row series of operation steps is to produce computer implemented treatment, so that the finger for performing on a computing device
Order is provided for realizing in one flow of flow chart or multiple one square frame of flow and/or block diagram or multiple
The step of function of being specified in square frame.
Although being described to the various embodiments described above, those skilled in the art once learn
Basic creative concept, then can make other change and modification, so above institute to these embodiments
Only embodiments of the invention are stated, scope of patent protection of the invention is not thereby limited, it is every using this
Equivalent structure or equivalent flow conversion that description of the invention and accompanying drawing content are made, or directly or indirectly use
In other related technical fields, similarly it is included within scope of patent protection of the invention.
Claims (8)
1. a kind of video synchronization method, is applied between main frame and slave, it is characterised in that including following step
Suddenly：
Main frame sets up communication connection with slave；
Main frame sends video or video address to slave；
Slave receives video or video address and plays video；
Main frame plays video and sends the host time label of current video broadcasting to slave；
Slave Receiving Host time tag simultaneously adjusts slave video playback progress according to host time label.
2. a kind of video synchronization method according to claim 1, it is characterised in that step " slave
Slave video playback progress is adjusted according to host time label " comprise the following steps：
Slave judge host time label and the slave time tag of current slave video playback difference whether
More than preset value；
If it is, slave adjusts slave video playback progress to host time label, and continue broadcasting and regard
Frequently；
Otherwise, slave continues to play video.
3. a kind of video synchronization method according to claim 1 and 2, it is characterised in that also include
Following steps：
Main frame receives Broadcast Control order；
Main frame changes main frame broadcast state and sends Broadcast Control order to slave according to Broadcast Control order；
Slave receives Broadcast Control order and changes slave broadcast state according to Broadcast Control order.
4. a kind of video synchronization method according to claim 1 and 2, it is characterised in that step " from
Machine adjustment slave video playback progress " comprises the following steps：
Slave sets host time label and decodes storehouse to the video of slave.
5. a kind of video synchronizing system, including main frame and slave, main frame set up communication connection with slave,
It is characterized in that：
Main frame includes video sending module, host video playing module, time tag sending module；
Slave includes video reception module, slave video playback module, time tag receiver module, broadcasting
Progress adjustment module；
Wherein：
Video sending module is used to send video or video address to slave；
Video reception module is used to receive video or video address；
Slave video playback module is used for according to video or video address and plays video；
Host video playing module is used for main frame and plays video；
Time tag sending module is used to send the host time label of current video broadcasting to slave；
Time tag receiver module is used for Receiving Host time tag；
Playing progress rate adjusting module is used to adjust slave video playback progress according to host time label.
6. a kind of video synchronizing system according to claim 5, it is characterised in that playing progress rate is adjusted
Mould preparation block is additionally operable to judge the difference of host time label and the slave time tag of current slave video playback
Whether preset value is more than；
If it is, adjustment slave video playback progress is to host time label, and continue to play video；
Otherwise, continue to play video.
7. a kind of video synchronizing system according to claim 5 or 6, it is characterised in that main frame bag
Include Host Command receiver module, Host Command respond module, Host Command forwarding module；
Slave includes slave machine order receiver module, slave machine order respond module；
Host Command receiver module is used for main frame and receives Broadcast Control order；
Host Command respond module is used to change main frame broadcast state according to Broadcast Control order；
Host Command forwarding module is used to send Broadcast Control order to slave；
Slave machine order receiver module is used for slave and receives Broadcast Control order；
Slave machine order respond module is used to change slave broadcast state according to Broadcast Control order.
8. a kind of video synchronizing system according to claim 5 or 6, it is characterised in that play into
Degree adjusting module is additionally operable to set host time label to the video decoding storehouse of slave.
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| TWI660628B (en) * | 2018-02-05 | 2019-05-21 | 佳世達科技股份有限公司 | Method for playback synchronization of media among devices |
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| CN110677611A (en) * | 2019-08-16 | 2020-01-10 | 厦门亿联网络技术股份有限公司 | Multi-device recording synchronization method and system and conference system |
| CN111314751A (en) * | 2020-02-28 | 2020-06-19 | 深圳市创维群欣安防科技股份有限公司 | Multi-screen linkage playing method and device, intelligent terminal and storage medium |
| CN111628916A (en) * | 2019-02-27 | 2020-09-04 | 华为技术有限公司 | Method for cooperation of intelligent sound box and electronic equipment |
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| CN110677611A (en) * | 2019-08-16 | 2020-01-10 | 厦门亿联网络技术股份有限公司 | Multi-device recording synchronization method and system and conference system |
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