CN105187689A - Method for synchronizing ultra-high-definition video played jointly by multiple terminals - Google Patents
Method for synchronizing ultra-high-definition video played jointly by multiple terminals Download PDFInfo
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- CN105187689A CN105187689A CN201510656132.4A CN201510656132A CN105187689A CN 105187689 A CN105187689 A CN 105187689A CN 201510656132 A CN201510656132 A CN 201510656132A CN 105187689 A CN105187689 A CN 105187689A
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Abstract
The invention discloses a method for synchronizing an ultra-high-definition video played jointly by multiple terminals. An ultra-high-definition video source is divided into different sub videos through a video cutting technology, and each terminal is in charge of playing a corresponding video and synchronization is performed; and the synchronization includes initialization synchronization and playing synchronization, wherein the initialization synchronization is used for ensuring that all the sub videos start to be played at the same time, and playing synchronization is used for ensuring that the videos are played synchronously in a playing process. The method performs physical division on the ultra-high-definition video, some part of sub videos are played on different terminals, and synchronization processing are performed on the videos, thereby ensuring consistency of video presentation, lowering requirements of video playing for terminal performance, and ensuring synchronization of the same ultra-high-definition video source played by multiple terminals.
Description
Technical field
The present invention relates to a kind of method utilizing multiple terminals jointly to play ultra high-definition video source, specifically a kind of multiple terminals plays the synchronous method of ultra high-definition video jointly.
Background technology
Current on multi-screen display systems displaying video, can only be supported on single terminal end and play a video source, when relating to multiple terminal plays unify video source, each terminal is due to the difference such as performance, system clock, the difference of video playout speed can be produced, different screens shows broadcasting asynchronous, affect bandwagon effect.Meanwhile, single terminal end is being play ultra high-definition video (resolution can reach pixel * more than 10000 more than thousand pixel) and when showing at multi-screen, can need professional image processing machine to process, and cost is also very large.
Summary of the invention
In order to overcome prior art Problems existing, the object of this invention is to provide the synchronous method that a kind of multiple terminals plays ultra high-definition video jointly, the method is by carrying out physical segmentation by ultra high-definition video, at the sub-video of different terminal plays parts, and these videos are synchronously processed, ensure the consistency that video represents, reduce the requirement of video playback to terminal capabilities, also ensure that the synchronism of same ultra high-definition video source is play in multiple terminals.
Object of the present invention is achieved through the following technical solutions:
Multiple terminals plays a synchronous method for ultra high-definition video jointly, it is characterized in that: the method is by ultra high-definition video source by video cutting technique, and be divided into different sub-videos, each terminal is responsible for playing corresponding video, and carries out synchronous; The described initial synchronization that is synchronously divided into is synchronous with broadcasting, and initial synchronization is used for ensureing that all sub-videos start to play simultaneously; Play and be synchronously then used for ensureing that in playing process, audio video synchronization is play, synchronous method is as follows:
1) initial synchronization; Select udp protocol, by udp broadcast between terminal, make each terminal the state of oneself can both be sent to other-end, inform which kind of state is other-end the machine be in; And other-end safeguards an overall SOT state of termination table, this state table is used for recording the situation of other-end, only has when in state table, and when every other terminal is all ready to start, the machine just starts startup; This communication mechanism of each terminal ensure that the connectivity of terminal, meanwhile, when each terminal starts displaying video, ensures that simultaneously each terminal starts displaying video by this communication mechanism, avoid start play just produce deviation;
2) play synchronously; In the process play, at special time, record the frame number that the machine video playback arrives, and be broadcast to other-end, every platform machine chooses that the fastest machine of broadcasting as synchronous base after receiving the video frame number of other machines broadcasting; In the synchronous time interval, adjust according to different situations, when set of terminal performance difference is not obvious, the sync interval time is long; When set of terminal performance difference is obvious, the sync interval time is short; Broadcasting is synchronously the process of dynamic synchronization, and choosing the fastest machine of broadcasting is benchmark.
In the present invention, first ultra high-definition video source is by video cutting technique, and be divided into different sub-videos, each terminal is responsible for playing corresponding video, and carries out synchronous.Each terminal is responsible for playing the process of sub-video and the broadcasting of common unit does not have difference, and it is synchronous that the difficult point of whole method is between different terminals between video.Synchronous for ensureing, need all subsystems to play at one time simultaneously, and also want to keep synchronous in the process play.Therefore, simultaneous techniques is divided into initial synchronization and plays synchronous, initial synchronization is used for ensureing that all sub-videos start to play simultaneously; Play and be synchronously then used for ensureing that in playing process, audio video synchronization is play.
Initial synchronization.That wants between support terminal is synchronous, and must have the communication of individual mechanism between them, this method have selected the less udp protocol of expense.By udp broadcast between terminal, make each terminal the state of oneself can both be sent to other-end, inform which kind of state is other-end the machine be in.And other-end needs the overall SOT state of termination table of maintenance one, this state table is used for recording the situation of other-end, only has when in state table, and when every other terminal is all ready to start, the machine just starts startup.This communication mechanism of each terminal ensure that the connectivity of terminal, meanwhile, when each terminal starts displaying video, also needs this mechanism to ensure that each terminal starts displaying video simultaneously, avoid start play just produce deviation.
Play synchronous.In video playback, each terminal is due to differences such as performances, and video playback has the difference of speed, is embodied on multi-screen, is exactly the asynchronous of each screen.Therefore in the process play, need at special time, record the frame number that the machine video playback arrives, and be broadcast to other-end, every platform machine chooses that the fastest machine of broadcasting as synchronous base after receiving the video frame number of other machines broadcasting.In the synchronous time interval, have adjustment according to different situations.When set of terminal performance difference is not obvious, sync interval can arrange greatly a bit; When set of terminal performance difference is obvious, sync interval needs to diminish.Playing is synchronously the process of dynamic synchronization, is not synchronously with a certain machine for fixed reference, but to choose the fastest machine of broadcasting be dynamically benchmark.
Distributional concept is introduced video playback by the present invention, multiple terminals is made to coact to play same ultra high-definition video, this method is by carrying out physical segmentation by ultra high-definition video, at the sub-video of different terminal plays parts, and these videos are synchronously processed, ensure the consistency that video represents.Both reduced the requirement of video playback to terminal capabilities, also ensure that the synchronism of same ultra high-definition video source was play in multiple terminals.
Accompanying drawing explanation
Fig. 1 is flow chart of the present invention.
Embodiment
Below in conjunction with accompanying drawing 1 and specific embodiment, handling process of the present invention is elaborated further, for intelligent display platform ultra high-definition video playback.
Multiple terminals plays a synchronous method for ultra high-definition video jointly, and by ultra high-definition video source by video cutting technique, be divided into different sub-videos, each terminal is responsible for playing corresponding video, and carries out synchronous; The described initial synchronization that is synchronously divided into is synchronous with broadcasting, and initial synchronization is used for ensureing that all sub-videos start to play simultaneously; Play and be synchronously then used for ensureing that in playing process, audio video synchronization is play, concrete steps are as follows:
Step 1: use video cutting software, is cut into sub-video by a complete video, sets the sub-video that each terminal is responsible for playing;
Step 2: terminal carries out initial work.Each terminal sets up SOT state of termination table, and each terminal, after oneself initialization completes, broadcasts a UDP message, and the state of notice other-end oneself is ready state;
Step 3: terminal wait accepts other UDP messages, until all terminals are all ready in local terminal state table display local area network (LAN), starts displaying video;
Step 4: in video display process, the frame number that recording of video is play, the timing synchronization interval that this platform is arranged is 100ms, and after namely often playing 100ms, the broadcasting frame number of oneself is gone out by udp broadcast by each terminal, skips to step 5 and processes.If finished, skip to step 6 and end process;
Step 5: terminal, after receiving the video playback frame number of other-end, picks out the frame number that broadcasting is the fastest, if the frame number that the machine is play is little, video skips to the fastest frame number and plays; If the frame number that the machine is play is large, then do not carry out frame-skipping process.Skip to step 4 circular treatment;
Step 6: each terminal broadcast video playback terminates, if video is loop play, skips to step 2 and carry out initialization process, otherwise video playback terminates, releasing resource.
The present invention, by ultra high-definition video is carried out physical segmentation, at the sub-video of different terminal plays parts, and synchronously processes these videos, ensures the consistency that video represents.Both reduced the requirement of video playback to terminal capabilities, also ensure that the synchronism of same ultra high-definition video source was play in multiple terminals.
Claims (2)
1. multiple terminals plays a synchronous method for ultra high-definition video jointly, it is characterized in that: the method is by ultra high-definition video source by video cutting technique, and be divided into different sub-videos, each terminal is responsible for playing corresponding video, and carries out synchronous; The described initial synchronization that is synchronously divided into is synchronous with broadcasting, and initial synchronization is used for ensureing that all sub-videos start to play simultaneously; Play and be synchronously then used for ensureing that in playing process, audio video synchronization is play, synchronous method is as follows:
1) initial synchronization; Select udp protocol, by udp broadcast between terminal, make each terminal the state of oneself can both be sent to other-end, inform which kind of state is other-end the machine be in; And other-end safeguards an overall SOT state of termination table, this state table is used for recording the situation of other-end, only has when in state table, and when every other terminal is all ready to start, the machine just starts startup; This communication mechanism of each terminal ensure that the connectivity of terminal, meanwhile, when each terminal starts displaying video, ensures that simultaneously each terminal starts displaying video by this communication mechanism, avoid start play just produce deviation;
2) play synchronously; In the process play, at special time, record the frame number that the machine video playback arrives, and be broadcast to other-end, every platform machine chooses that the fastest machine of broadcasting as synchronous base after receiving the video frame number of other machines broadcasting; In the synchronous time interval, adjust according to different situations, when set of terminal performance difference is not obvious, the sync interval time is long; When set of terminal performance difference is obvious, the sync interval time is short; Broadcasting is synchronously the process of dynamic synchronization, and choosing the fastest machine of broadcasting is benchmark.
2. multiple terminals according to claim 1 plays the synchronous method of ultra high-definition video jointly, it is characterized in that the method concrete steps are as follows:
Step 1: use video cutting software, is cut into sub-video by a complete video, sets the sub-video that each terminal is responsible for playing;
Step 2: terminal carries out initial work; Each terminal sets up SOT state of termination table, and each terminal, after oneself initialization completes, broadcasts a UDP message, and the state of notice other-end oneself is ready state;
Step 3: terminal wait accepts other UDP messages, until all terminals are all ready in local terminal state table display local area network (LAN), starts displaying video;
Step 4: in video display process, the frame number that recording of video is play, the timing synchronization interval that this platform is arranged is 100ms, and after namely often playing 100ms, the broadcasting frame number of oneself is gone out by udp broadcast by each terminal, skips to step 5 and processes; If finished, skip to step 6 and end process;
Step 5: terminal, after receiving the video playback frame number of other-end, picks out the frame number that broadcasting is the fastest, if the frame number that the machine is play is little, video skips to the fastest frame number and plays; If the frame number that the machine is play is large, then do not carry out frame-skipping process;
Skip to step 4 circular treatment;
Step 6: each terminal broadcast video playback terminates, if video is loop play, skips to step 2 and carry out initialization process, otherwise video playback terminates, releasing resource.
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| CN105739935A (en) * | 2016-01-22 | 2016-07-06 | 厦门美图移动科技有限公司 | Multi-terminal combined display method, apparatus and system |
| CN107027066A (en) * | 2017-03-24 | 2017-08-08 | 深圳市环球数码科技有限公司 | A kind of high-resolution digital cinema player method and system |
| CN107566877A (en) * | 2017-09-28 | 2018-01-09 | 惠州Tcl移动通信有限公司 | A kind of more video clip player method, storage medium and intelligent terminals |
| CN108259966A (en) * | 2018-04-11 | 2018-07-06 | 大连理工大学 | A kind of multimedia large-size screen monitors synchronous broadcast method based on GPS time services |
| CN109922230A (en) * | 2017-12-12 | 2019-06-21 | 阿里巴巴集团控股有限公司 | Synchronous broadcast method, control method for playing back and the device of dynamic content |
| CN112217960A (en) * | 2020-10-14 | 2021-01-12 | 四川长虹电器股份有限公司 | Method for synchronously displaying multi-screen playing pictures |
| CN112770164A (en) * | 2020-12-22 | 2021-05-07 | 上海幻维数码创意科技股份有限公司 | Video synchronous playing method |
| CN113115016A (en) * | 2021-04-08 | 2021-07-13 | 浙江大学 | Overlay type virtual imaging video display control system |
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| CN112770164A (en) * | 2020-12-22 | 2021-05-07 | 上海幻维数码创意科技股份有限公司 | Video synchronous playing method |
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Application publication date: 20151223 |