CN106131660A - video positioning playing method and device - Google Patents
video positioning playing method and device Download PDFInfo
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- CN106131660A CN106131660A CN201610556181.5A CN201610556181A CN106131660A CN 106131660 A CN106131660 A CN 106131660A CN 201610556181 A CN201610556181 A CN 201610556181A CN 106131660 A CN106131660 A CN 106131660A
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- slicing files
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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
- H04N21/434—Disassembling of a multiplex stream, e.g. demultiplexing audio and video streams, extraction of additional data from a video stream; Remultiplexing of multiplex streams; Extraction or processing of SI; Disassembling of packetised elementary stream
- H04N21/4343—Extraction or processing of packetized elementary streams [PES]
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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
- H04N21/47—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
-
- 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
- H04N21/83—Generation or processing of protective or descriptive data associated with content; Content structuring
- H04N21/845—Structuring of content, e.g. decomposing content into time segments
- H04N21/8456—Structuring of content, e.g. decomposing content into time segments by decomposing the content in the time domain, e.g. in time segments
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Databases & Information Systems (AREA)
- Human Computer Interaction (AREA)
- Television Signal Processing For Recording (AREA)
Abstract
Embodiments providing video positioning playing method and device, described method includes: according to the alteration command playing the moment for video received, determine the broadcasting moment after change；Obtain the TS slicing files belonging to the moment of the broadcasting after described change；Determine the PES bag carrying I frame corresponding with the broadcasting moment after described change in described TS slicing files；The I frame carried from the PES bag determined proceeds by broadcasting.In the embodiment of the present invention, can orient with change after play I frame corresponding to moment, be equivalent to position in units of I frame, it is greatly improved positioning precision, user can be reduced and change the probability playing the discrepancy such as moment rear video generation rollback or advance, so that user feels that after the moment is play in change video image remains seamless link, thus it is greatly promoted the experience of user.
Description
Technical field
The present invention relates to video display arts field, specifically, the present invention relates to a kind of video positioning playing method and
Device.
Background technology
Along with the progress of science and technology, Intelligent set top box, intelligent television, smart mobile phone, panel computer, notebook computer or desk-top
The terminal units such as computer are widely used.User generally utilizes these terminal units to play the video of the Streaming Media form on network.
Program server is generally according to stream media protocol based on HTTP, and (HTTP Live Streaming surpasses such as HLS
Text transfer protocol real-time streams) agreement, complete TS (Transport Stream, transmission stream) video file was cut according to the time
It is slit into multiple TS slicing files.Further, program server, according to the order of cutting, distributes burst sequence number for each TS slicing files,
File identification according to burst serial number gencration TS slicing files.Program server is complete TS video file creating index file
After (index file of the entitled m3u8 of such as suffix), indexed file records the file identification of each TS slicing files.
Existing video broadcasting method generally includes: the player in terminal unit gets the index literary composition of TS video file
After part, successively according to the file identification of TS slicing files each in index file, obtain the TS of correspondence one by one from program server end
Slicing files plays out, thus realizes broadcasting limit, limit and download.
Existing video positioning playing method is typically, and user specifies certain to play moment, example in video display process
As dragged forward progress bar；Player played out according to this broadcasting moment specified.
But, it was found by the inventors of the present invention that existing video positioning playing method, it is not the broadcasting specified from user
Moment commences play out, but plays the initial of the TS slicing files belonging to the moment or next TS slicing files from specify
Playing the moment commences play out, and there is bigger deviation, be easily caused currently playing video content with specify play the moment it
There is disconnection in the video content of front broadcasting.It is to say, existing video positioning playing method, to the precision of the location of video relatively
Low, the video content play before and after being easily caused location produces and disconnects, and greatly reduces user and watches the experience of video.
Summary of the invention
The shortcoming that the present invention is directed to existing mode, proposes a kind of video positioning playing method and device, existing in order to solve
There is the problem that video positioning precision is relatively low in technology.
Embodiments of the invention are according to an aspect, it is provided that a kind of video positioning playing method, including:
According to the alteration command playing the moment for video received, determine the broadcasting moment after change；
Obtain the TS slicing files belonging to the moment of the broadcasting after described change；
Determine the PES bag carrying I frame corresponding with the broadcasting moment after described change in described TS slicing files；
The I frame carried from the PES bag determined proceeds by broadcasting.
Embodiments of the invention, according to another aspect, additionally provide a kind of video positioning playing device, including:
Play moment change module, for according to the alteration command playing the moment for video received, determining
The broadcasting moment after change；
TS slicing files acquisition module, the TS slicing files belonging to the moment of the broadcasting after obtaining described change；
PES bag determines module, corresponding with the broadcasting moment after described change for determining in described TS slicing files
Carry the PES bag of I frame；
From described PES bag, playing module, for determining that the I frame the PES bag that module is determined proceeds by broadcasting.
In the embodiment of the present invention, determine the PES carrying I frame corresponding with the broadcasting moment after change in TS slicing files
Bag, illustrates to have oriented the I frame corresponding with the broadcasting moment after change, is equivalent to position in units of I frame, positioning precision
Can reach 0. more than zero second or several seconds of zero point, carry out positioning (positioning precision with existing in units of whole TS slicing files
For several seconds) compare, be greatly improved positioning precision, can be substantially reduced user change broadcasting moment rear video generation rollback or
The probability of the discrepancies such as advance, so that user feels that after the moment is play in change video image remains seamless link
, thus it is greatly promoted the experience of user.
Aspect and advantage that the present invention adds will part be given in the following description, and these will become from the following description
Obtain substantially, or recognized by the practice of the present invention.
Accompanying drawing explanation
The present invention above-mentioned and/or that add aspect and advantage will become from the following description of the accompanying drawings of embodiments
Substantially with easy to understand, wherein:
Fig. 1 is the schematic flow sheet of the video positioning playing method of the embodiment of the present invention；
Fig. 2 is the correction method of playing moment immediate TS bag relative with target in a cycle of the embodiment of the present invention
Schematic flow sheet；
Fig. 3 is the block schematic illustration of the internal structure of the video positioning playing device of the embodiment of the present invention；
Fig. 4 is the block schematic illustration that the PES bag of the embodiment of the present invention determines the internal structure of module.
Detailed description of the invention
Embodiments of the invention are described below in detail, and the example of described embodiment is shown in the drawings, the most from start to finish
Same or similar label represents same or similar element or has the element of same or like function.Below with reference to attached
The embodiment that figure describes is exemplary, is only used for explaining the present invention, and is not construed as limiting the claims.
Those skilled in the art of the present technique are appreciated that unless expressly stated, singulative used herein " ", "
Individual ", " described " and " being somebody's turn to do " may also comprise plural form.It is to be further understood that use in the description of the present invention arranges
Diction " including " refers to there is described feature, integer, step, operation, element and/or assembly, but it is not excluded that existence or adds
Other features one or more, integer, step, operation, element, assembly and/or their group.It should be understood that when we claim unit
Part is " connected " or during " coupled " to another element, and it can be directly connected or coupled to other elements, or can also exist
Intermediary element.Additionally, " connection " used herein or " coupling " can include wireless connections or wireless couple.Used herein arrange
Diction "and/or" includes that one or more list the whole of item or any cell being associated combines with whole.
Those skilled in the art of the present technique are appreciated that unless otherwise defined, and all terms used herein (include technology art
Language and scientific terminology), have with the those of ordinary skill in art of the present invention be commonly understood by identical meaning.Also should
Be understood by, those terms defined in such as general dictionary, it should be understood that have with in the context of prior art
The meaning that meaning is consistent, and unless by specific definitions as here, otherwise will not use idealization or the most formal implication
Explain.
Those skilled in the art of the present technique are appreciated that " terminal " used herein above, " terminal unit " had both included wireless communication
The equipment of number receptor, it only possesses the equipment of wireless signal receiver of non-emissive ability, includes again receiving and launching hardware
Equipment, its have on bidirectional communication link, can carry out two-way communication reception and launch hardware equipment.This equipment
May include that honeycomb or other communication equipments, it has single line display or multi-line display or does not has multi-line to show
The honeycomb of device or other communication equipments；PCS (Personal Communications Service, PCS Personal Communications System), it can
Process with combine voice, data, fax and/or its communication ability；PDA (PersonalDigital Assistant, individual
Digital assistants), it can include the access of radio frequency receiver, pager, the Internet/intranet, web browser, notepad, day
Go through and/or GPS (Global PositioningSystem, global positioning system) receptor；Conventional laptop and/or hand held
Computer or other equipment, its have and/or include the conventional laptop of radio frequency receiver and/or palmtop computer or other
Equipment." terminal " used herein above, " terminal unit " can be portable, can transport, be arranged on the vehicles (aviation, sea
Fortune and/or land) in, or be suitable for and/or be configured at local runtime, and/or with distribution form, operate in the earth
And/or any other position operation in space." terminal " used herein above, " terminal unit " can also is that communication terminal, on
Network termination, music/video playback terminal, such as, can be PDA, MID (Mobile Internet Device, mobile Internet
Equipment) and/or there is the mobile phone of music/video playing function, it is also possible to it is the equipment such as intelligent television, Set Top Box.
The inventors found that a kind of improved though for prior art is, shorten TS (Transport
Stream, transmission stream) playing duration of slicing files；But, so it is greatly increased the number of TS slicing files and corresponding
The content scale of index file；Bring white elephant to program server, cause service side to need program server of upgrading
Software and hardware or the number of increase program server, cause high cost.
Further, present inventor have further discovered that a kind of improved method, including: program server is each TS of video
A two field picture in slicing files generates thumbnail；When the video in terminal unit is advanced by user, user click on into
The thumbnail presented with queue form above degree bar, it is achieved the broadcasting of corresponding TS slicing files.It practice, in this improved method,
What thumbnail played is the effect positioning whole TS slicing files, the most still plays out in units of TS slicing files, depending on
The positioning precision of frequency there is no raising；And, program server needs to generate the thumbnail of magnanimity for substantial amounts of video, and burden is very
Heavy；Further, the player of terminal unit is also required to download extra thumbnail, causes taking extra system resource and net
The Internet resources such as network bandwidth.
Additionally, present inventor have further discovered that another kind of improved method: server end, when storing TS slicing files, is remembered
The record information recording each I frame includes the positional information of I frame, length information；By the institute comprised corresponding in a TS slicing files
There is the record information of I frame, form the I frame delineation information of this TS slicing files, be stored in the extended field of M3U8 index file；
When terminal unit obtains M3U8 file, obtain the I frame delineation information of each TS slicing files simultaneously, exist according to I frame delineation information
User interface display Seek (lookup) moment or the I frame that automatic sequence Seek is corresponding when advance/fast reverse operation are broadcast
Put.
The present inventor is it has furthermore been found that user the most only carries out moment lookup several times to a video, it is only necessary to
Determine that several moment search corresponding I frame when stopping, the most only needing the record information of several I frames in this video.
But, server end is in the face of various users, it is impossible in the case of the prediction user required moment searched, to each video
In each I frame be required for recording its record information, this job demand server undertakes extra work, expends server
Substantial amounts of system resource.And, index file adds substantial amounts of I frame delineation information, transmits this index file and additionally take
Internet resources, increase network burden.Further, I frame delineation information is stored in the extended field of index file, and this causes terminal
The player not supporting the extended field of index file in equipment cannot use this another kind method, causes this improved method to be suitable for
Face is the narrowest, portable poor.
The present inventor continues to study the generation process of TS slicing files.
ES (Elementary Streams, primary flow) is directly from the encoded data stream of encoder output, example
As being the video data stream through H.264 encoding.Each ES is made up of several memory element (AU), and each AU is
Being made up of header data and coded data, the coded data in 1 AU is typically a frame video image.One frame video image is permissible
It is I frame, P frame or B frame.
I frame is intracoded frame.I frame represents key frame, and it is a full frame compressed coded frames.It is by full frame image information
It is compressed coding；Only use the data of I frame with regard to restructural complete image during decoding.
P frame is forward-predictive-coded frames.P frame describes this frame and an I frame before or the difference data of P frame, decoding
Time need to be superimposed with the data differences of this frame definition by the I that caches before or P frame data, generate final image data.
B frame is bi-directional predicted interpolation coding frame.B frame is two-way difference frame, record be this frame with I or P frame above, with
And and this frame P frame below between difference data；B frame to be decoded, I or the P frame of the caching before B frame to be obtained, also
Decode the P frame after this B frame, obtain final view data by front and back's frame data with superposing of these frame data.
PES (Packetized Elementary Streams, the primary flow of encapsulation), is that ES processes through PES wrapper
The data stream of rear formation, this processing procedure includes ES flow point group, encapsulates, adds the operation such as header packet information.PES's is the most single
Position is PES bag.PES bag is made up of packet header and load (payload).The AU that the load of PES bag is typically in ES, i.e. comprises
One frame (I frame, P frame or B frame) data.
Multichannel PES is combined into TS (Transport Stream, transmission stream).The ultimate unit of TS is the TS that length is fixing
Bag.TS bag is a Reseal to PES bag；Each TS includes packet header and load.Generally a PES bag is cut into multiple
Segmentation, respectively as the load of multiple TS bags.
The playing duration of TS slicing files is usually several seconds or tens seconds, per second generally comprises multiple frame (such as 24,25
Or 30 frames etc.), every frame typically requires again multiple TS bag and transmits.Therefore, TS slicing files generally comprises multiple TS bag, the most several
Hundred, thousand of or up to ten thousand TS bags.
Based on above-mentioned discovery and research, in the embodiment of the present invention, terminal unit is according to the broadcasting for video received
The alteration command in moment, determines the broadcasting moment after change；Obtain the TS burst literary composition play belonging to the moment after described change
Part；Determine the PES bag carrying I frame corresponding with the broadcasting moment after described change in described TS slicing files；To determine
PES bag in the I frame that carries play out as start frame.Visible, in the embodiment of the present invention, determine in TS slicing files with
Play the PES bag carrying I frame corresponding to moment after change, illustrate to have oriented with change after I frame corresponding to broadcasting moment,
Being equivalent to position in units of I frame, positioning precision can reach 0. more than zero second or several seconds of zero point, with existing with whole
TS slicing files is that unit carries out positioning (positioning precision is several seconds) and compares, and is greatly improved positioning precision, can be substantially reduced
User changes the probability playing the discrepancy such as moment rear video generation rollback or advance, and positioning precision can be with the regarding of the mankind
Feel that the residence time is comparable, so that user feels that after the moment is play in change video image remains seamless link, from
And it is greatly promoted the experience of user.
And, it is not necessary to change existing TS slicing files and index file, it is not necessary to existing program server is changed
Make, it is not necessary to program server undertakes generation thumbnail or index file the extra work load such as be extended, without
Terminal unit increases the support of the index file to extension, it is possible to implement embodiments of the invention.Visible, the enforcement of the present invention
Example, on the basis of promoting video positioning precision, also has good compatibility and portability, and the scope of application is wider.
The most specifically introduce the technical scheme of the embodiment of the present invention.
The application scenarios of embodiments of the invention is, the player of terminal unit receives user's broadcasting for a certain video
After putting instruction, download the index file (such as m3u8 index file) of this video to program server request, then according to this rope
Quotation part is downloaded each TS slicing files in order and is played out.
The schematic flow sheet of the video positioning playing method of embodiments of the invention is as it is shown in figure 1, comprise the steps:
S101: according to the alteration command playing the moment for video received, determine the broadcasting moment after change.
In the broadcasting moment of the video in the embodiment of the present invention, refer to the moment on the basis of the initial broadcasting moment of this video.
Such as, the playing duration of video is 60 minutes, this video initial broadcasting the moment be 0 point 0 second, the broadcasting moment is appointed as (example
As moment bar is dragged to) 6 points 4 seconds time, playing the moment is 6 points 4 seconds.
Player in terminal unit receive for video play the moment change operation after, determine receive for
The alteration command playing the moment of video；According to this alteration command, determine the broadcasting moment after change.
It is preferred that after the player in terminal unit receives the vernier drag operation of the progress bar for video, determine
Receive the alteration command playing the moment for video；According to this alteration command, determine the vernier of the moment bar after dragging
The broadcasting moment that stop position is corresponding.
Such as, the player in terminal unit receive by play the moment from 6 points within 4 seconds, be changed to 7 points of operations of 6 seconds after,
Determine to receive and the moment of playing of video is changed to 7 points of alteration commands of 6 seconds；According to this alteration command, after determining change
The broadcasting moment be 7 points 6 seconds.
S102: obtain the TS slicing files belonging to the moment of the broadcasting after change.
The TS slicing files belonging to the moment of playing after player in terminal unit determines change has been buffered in this most
In equipment；The most directly obtain TS slicing files；Otherwise according to TS slicing files in the index file of the video obtained in advance
File identification, by download obtain TS slicing files.
Such as, the playing duration of each TS slicing files of video is 10 seconds, and the player in terminal unit can be true
Making, the moment 7 points of playing after change belongs to the broadcasting moment for 6 seconds from 7 points of 0 second to 7 points TS slicing files of 10 seconds；Determine this TS
Slicing files has been buffered in this equipment the most；The most directly obtain this TS slicing files；Otherwise according to regarding of obtaining in advance
The file identification of this TS slicing files in the index file of frequency, such as URL (Uniform Resource Locator, unified money
Source location device), download from program server and obtain this TS slicing files.
It is preferred that after terminal unit obtains TS slicing files, for each TS bag in this TS slicing files, can pass through
Detect the pid parameter in the packet header of this TS bag to determine the kind of the load (i.e. a part of content of PES bag) of this TS bag, load
Can be video data (a part of data of frame of video), voice data or other data.Such as, detect in TS packet header
When PID is 0x20, determine that the load of this TS bag is video data.In like manner, it may be determined that go out the TS bag that load is voice data.
S103: determine the PES bag carrying I frame corresponding with the broadcasting moment after change in TS slicing files.
Player in terminal unit determine change after broadcasting time be engraved in TS slicing files target relatively play
Moment.
It is preferred that the player in terminal unit determine change after (appointment) broadcasting moment, with in this video become
Relatively playing the moment on the basis of the initial broadcasting moment playing TS slicing files belonging to the moment after more, broadcasts relatively as target
Put the moment.Such as, the playing duration of each TS slicing files of video is 10 seconds, initial to play the moment be 0 second；If will broadcast
Putting the moment is altered to (being assigned to) some TS slicing files and initiates and play the 6th second after the moment, then (specifying after this change
) target in broadcasting moment (this TS slicing files) the broadcasting moment relatively is 6 seconds.
Determine and relative with target in TS slicing files play moment immediate PES bag.
Specifically, according to number and the average playing duration of the TS bag in TS slicing files, determine in TS slicing files
Relative with target play moment immediate TS bag.
Terminal unit, according to the amount of capacity of TS slicing files and the fixing amount of capacity of single TS bag, is determined
The number of the TS bag of this TS slicing files.It is preferred that terminal unit is according to the byte number of TS slicing files and single TS bag
Fixing byte number (such as 188 byte), determine the number of the TS bag of this TS slicing files.
Terminal unit is according to the number of the TS bag in the playing duration of TS slicing files and this TS slicing files, estimation
Go out the average playing duration of TS bag；And then determine and relative with target play moment immediate TS bag.
Such as, total playing duration of TS slicing files is 10 seconds, and this TS slicing files has altogether by 10000 TS packages
Becoming, the average playing duration of TS bag is 0.001 second, and the sequence number of TS bag is from the beginning of 1；The broadcasting moment is 3 seconds relatively；So terminal sets
The standby TS bag that can determine that serial number 3000 is relative with target to play moment immediate TS bag.
It is preferred that terminal unit can determine that and relative with target in TS slicing files plays moment corresponding setting model
Enclose interior TS bag；According to the PTS in the PES bag that TS bag each in set point each carries, each TS bag in determining set point
Reality relatively play the moment；Select actual relatively to play the moment and relative with target play the TS bag that between the moment, difference is minimum,
Moment immediate TS bag is play as relative with target.
Periodically revise play moment immediate TS bag relative with target, and then by involved by this TS bag revised
PES bag is defined as relative with target playing moment immediate PES bag；Concrete modification method will be discussed in detail the most not follow-up
Repeat again.
Relative with target play moment immediate PES bag for determine, determine in this PES bag whether carry I
The head of frame.Further, determine amended relative with target to play in moment immediate PES bag whether carry I frame
Head.
Such as, if detecting and the data of PES bag comprising mark 0x000001B, it is determined that this PES bag contains one
The head of I frame；Otherwise determine the head not comprising I frame in this PES bag.
If it is determined that immediate PES bag carries the head of I frame, then using this PES bag as with change after broadcasting
What the moment was corresponding carries the PES bag of I frame.
If it is determined that immediate PES bag does not carries the head of I frame, then according to the arrangement represented by pts value in PES bag
Sequentially, unwrap the beginning from the PES being close to immediate PES bag and search PES bag successively, until finding the PES of the head carrying I frame
Bag, as the PES bag that carry I frame corresponding with the broadcasting moment after change.
It is appreciated that PES bag carries complete frame, once finds a PES bag and carry the head of I frame, this is described
PES bag carries complete I frame.
Comprising parameter PTS (Presentation Time Stamp shows time labelling) in PES packet header, PTS is distributed in 5
In 33 positions of individual byte, can be scaled a numerical value, player is according to the pts value of PES bag belonging to each frame, each to cache
Frame is play after resequencing.It is to say, PTS is for showing the DISPLAY ORDER of the frame in PES bag.
According to following formula (1) PTS in PES packet header is scaled pts value:
Pts value=(PTS1&0x0e)<<29+ (PTS2&0xfffe)<<14+ (PTS3&0xfffe)>>1 ... .. (1)
In formula (1), PTS3 is the 0-14 position of PTS content in PES packet header；PTS2 is the 15-29 position of PTS content；PTS1
30-32 position for PTS content；<<with>>respectively move to left and move to right.
Moment immediate PES bag is play, according to the PES represented by the size of the pts value of PES bag for relative with target
Putting in order of bag, unwraps the beginning from the PES being close to this PES bag and searches PES bag one by one, both can look into along the direction that pts value increases
Look for, can search along the direction that pts value reduces again, until finding the PES bag of the head carrying I frame, as with change after
The PES bag carrying I frame that the broadcasting moment is corresponding.
S104: the I frame carried from the PES bag determined proceeds by broadcasting.
Player in terminal unit for after above-mentioned that determine and change play the moment corresponding carry I frame
PES bag, parses the I frame carried in this PES bag.
After determining I frame, can (Decoding Time Stamp, during decoding according to PTS and DTS in PES packet header
Between label) PCR (Program Clock Reference, program clock reference) parameter in parameter, and/or TS packet header, determine
Going out the audio frame of synchronization corresponding with I frame, concrete grammar is well known to those skilled in the art, and here is omitted.
Afterwards, the player in terminal unit analytically goes out I frame and proceeds by broadcasting.
In above-mentioned steps S102, periodically correction is relative with target plays in moment immediate TS bag, repairing of a cycle
The schematic flow sheet of just relative with the target concrete grammar playing moment immediate TS bag is as in figure 2 it is shown, comprise the steps:
S201: the PES bag each carried according to the first TS bag in TS slicing files and current immediate TS bag
PTS, determines that the reality of current immediate TS bag is play the moment relatively.
First TS bag in TS slicing files generally all carries the packet header of PES bag, therefore can obtain in first TS bag
The PTS of PES bag, and calculate pts value.
The packet header of TS bag includes parameter payload_unit_start_indicator, is used for showing to carry in this TS bag
PES bag be whether the beginning (i.e. the packet header of PES bag) of a PES bag.When payload_unit_start_indicator is 1
Time, it is determined that this TS bag carries the packet header of PES bag.
Terminal unit, according to the parameter in immediate TS packet header, determines whether TS bag carries the packet header of PES bag.If
Close TS bag carries the packet header of PES bag, then obtain the PTS in the packet header of this PES bag and calculate pts value.
Further, if immediate TS bag does not carries the packet header of PES bag, then unwrap the beginning one by one from adjacent next TS
Detection, until detecting the TS bag in the packet header carrying PES bag；Using the TS bag carrying PES packet header that detects as immediate
TS bag, obtains the PTS in the packet header of this PES bag and calculates pts value.
The pts value that terminal unit relates to according to the first TS bag in TS slicing files, and relative with target play the moment
The pts value that immediate TS bag relates to, calculates reality and relatively plays the moment.
Specifically, pts value indicates the serial number of the frame that PES bag carries, calculate pts value that first TS bag relates to and
The difference of the pts value that above-mentioned immediate TS bag relates to, this difference table understands the actual interval frame number between two frames.Assume one
The video frame rate of TS stream is 30, say, that within one second, can show 30 frame pictures, then interval time between adjacent two frames or
The time-consuming of the every frame of person just can use formula increament=1/30 to draw, unit is the second.And then calculate and target phase
The reality playing the PES bag (frame) that moment immediate TS bag relates to is play the moment relatively.
Such as, between the first TS bag in TS slicing files relates to frame and the frame that above-mentioned immediate TS bag relates to
Actual interval frame number is 75 frames, and the interval time between adjacent two frames is 1/30 second, between actual interval frame number with adjacent two frames
Interval time be multiplied, obtaining (frame that above-mentioned immediate TS bag relates to), actual relatively to play moment be 2.5 seconds.
It will be understood by those skilled in the art that I frame compression ratio is minimum, P frame takes second place, B frame is the highest.Such as, the compression ratio of I frame
Generally about 7, P frame is about 20, and B frame can reach about 50.And, also differ with the data volume between the frame of type
Sample.Therefore, the number carrying the TS bag required for a whole frame (the most complete PES bag) is different.It is to say, it is same
During the number of the PES bag entrained by TS bag of number different.Therefore, between actual broadcasting moment relatively and theoretical broadcasting moment
It is usually present difference.
S202: determine the actual moment difference of playing moment relative with target of broadcasting relatively, if less than the moment preset
Difference limen value；The most then perform S203；Otherwise perform step S204.
Terminal unit determines that above-mentioned reality plays the moment difference of playing moment relative with above-mentioned target relatively, if be less than
The time difference threshold value preset；The most then perform S203；Otherwise perform step S204.
Those skilled in the art can be according to historical data, experimental data, empirical data and/or practical situation, the most really
Make time difference threshold value；Such as time difference threshold value is set as 0. more than zero second or several seconds of zero point etc..
Such as, terminal unit determines that above-mentioned reality is relatively play 2.5 seconds moment and relative with above-mentioned target play the moment 3 seconds
Difference be 0.5 second, more than time difference threshold value, perform step S204.
S203: by the current PES bag play moment immediate TS bag involved by relative with target, be defined as and target phase
To playing moment immediate PES bag.
The packet header of TS bag includes parameter payload_unit_start_indicator, is used for showing to carry in this TS bag
PES bag be whether the beginning (i.e. the packet header of PES bag) of a PES bag.When payload_unit_start_indicator is 1
Time, it is determined that this TS bag carries the packet header of PES bag.
Terminal unit plays moment immediate TS bag for the most relative with target, can be according to this immediate TS bag
Parameter in Tou, determines whether this TS bag carries the packet header of PES bag.
Determine after this TS bag carries packet header of PES bag, determine the PES bag that TS bag relates to: determine and carry PES
After the TS bag in the packet header of bag, unwrap the beginning from adjacent next TS and detect one by one, until the detection next one carries the bag of PES bag
The TS bag of head；Previously determined go out the TS bag that carries PES packet header and its with after determine carry PES packet header
TS bag between TS bag, the complete PES bag jointly carried, be previously determined go out the TS bag carrying PES packet header
The PES bag related to, the PES bag related to by this TS bag plays moment immediate PES bag as relative with target.
If immediate TS bag does not carries the packet header of PES bag, then unwrap the beginning from adjacent next TS and detect one by one, directly
To the TS bag packet header carrying PES bag being detected；Using the TS bag carrying PES packet header that detects as immediate TS bag, will
The PES bag that this TS bag relates to plays moment immediate PES bag as relative with target.
S204: relatively play the moment difference of playing moment relative with target according to reality, redefine relative with target
After playing progress rate immediate TS bag, carry out the correction of next cycle.
Terminal unit plays the moment difference of playing moment relative with above-mentioned target and above-mentioned TS relatively according to above-mentioned reality
The average playing duration of TS bag in slicing files, determines the number of TS bag corresponding to this difference.
According to the number of TS bag corresponding to above-mentioned difference, redefine with target relative to playing progress rate immediate TS bag.
Specifically, currently with target relative to the sequence number of playing progress rate immediate TS bag on the basis of, increase above-mentioned difference
The number of the TS bag that value is corresponding, redefines out with target relative to the immediate TS of playing progress rate.
Such as, terminal unit determines that above-mentioned reality is relatively play 2.5 seconds moment and relative with above-mentioned target play the moment 3 seconds
Difference be 0.5 second, corresponding 500 TS bags；Current is that affiliated TS burst is civilian with target relative to playing progress rate immediate TS bag
3000th TS bag in part；By the 3500th TS bag, relative with target play moment immediate TS bag as redefine.
Redefine with target relative to playing progress rate immediate TS bag after, carry out the correction of next cycle.
Based on above-mentioned video locating method, the embodiment of the present invention additionally provides a kind of video positioning playing device, this device
Being positioned in the terminal unit of the embodiment of the present invention, the block schematic illustration of the internal structure of this device is as it is shown on figure 3, include: play
Moment change module 301, TS slicing files acquisition module 302, PES bag determine module 303 and playing module 304.
Wherein, play moment change module 301 and be used for according to the alteration command playing the moment for video received,
Determine the broadcasting moment after change.
TS slicing files acquisition module 302 is for obtaining the broadcasting after playing the change that moment change module 301 is determined
TS slicing files belonging to moment.Specifically, belonging to the TS slicing files acquisition module 302 broadcasting moment after determining change
TS slicing files be the most buffered in this equipment；The most directly obtain TS slicing files；Otherwise basis obtains in advance
The file identification of TS slicing files in the index file of video, obtains TS slicing files by downloading.
PES bag determine module 303 for determining in the TS slicing files that TS slicing files acquisition module 302 obtains and
The PES bag carrying I frame corresponding to moment is play after change.
From PES bag, playing module 304 is for determining that the I frame the PES bag that module 303 is determined proceeds by broadcasting.
More excellent, PES bag in the embodiment of the present invention determines block schematic illustration such as Fig. 4 institute of the internal structure of module 303
Show, relatively play the moment including: target and determine unit 331, determine unit 332 closest to PES bag and take I frame PES bag and determine list
Unit 333.
Wherein, target is relatively play the moment and is determined the unit 331 broadcasting moment after determining change, with TS burst literary composition
Relatively playing the moment on the basis of the initial broadcasting moment of part, plays the moment relatively as target.
Determine that unit 332 is for determining that relative with target in TS slicing files to play the moment closest closest to PES bag
PES bag.Specifically, determine that unit 332 is for the playing duration according to TS slicing files and the number of TS bag closest to PES bag
Mesh, determines and relative with target in TS slicing files plays moment immediate TS bag；Periodically revise immediate TS bag；Its
In the correction in a cycle include: each carry according to the first TS bag in TS slicing files and current immediate TS bag
The PTS of PES bag, determine that the reality of current immediate TS bag is play the moment relatively；Determine actual relatively play the moment with
Target plays the difference in moment relatively, if less than the time difference threshold value preset；That the most current immediate TS bag is the most involved
And PES bag, be defined as relative with target playing moment immediate PES bag；Otherwise according to above-mentioned difference, redefine and connect most
After near TS bag, carry out the correction of next cycle.
Take I frame PES bag and determine that unit 333 is not for if it is determined that carry the head of I frame, then root in immediate PES bag
According to putting in order represented by pts value in PES bag, unwrap the beginning from the PES packing tightly neighbour with immediate PES and search other successively
PES bag, until finding the PES bag of the head carrying I frame, as the PES that carry I frame corresponding with the broadcasting moment after change
Bag.
It is preferred that determine unit 332 to be additionally operable to according to reality closest to PES bag relatively to play that the moment relative with target plays
The average playing duration of the difference in moment and TS bag, determines the number of TS bag corresponding to this difference；Corresponding according to this difference
The number of TS bag, redefines immediate TS bag.
It is preferred that determine that unit 332 is specifically for play the moment closest for currently the most relative with target closest to PES bag
TS bag, however, it is determined that go out the packet header carrying PES bag in this TS bag, then the PES bag related to by this TS bag is as relative with target
Play moment immediate PES bag；Detect the TS bag closed on the most one by one, until the TS bag in the packet header carrying PES bag being detected,
The PES bag involved by TS bag that will detect plays moment immediate PES bag as relative with target.
It is preferred that determine that unit 332 is specifically for determining relative with target in TS slicing files broadcasting closest to PES bag
TS bag in the set point that moment is corresponding；According to the PTS in the PES bag that TS bag each in set point each carries, determine
In going out set point, the reality of each TS bag is play the moment relatively；Select actual relatively play the moment relative with target play the moment it
Between the minimum TS bag of difference, play moment immediate TS bag as relative with target.
It is preferred that take I frame PES bag to determine that unit 333 is additionally operable to if it is determined that carry I frame in immediate PES bag
Head, then using this PES bag as the PES bag that carry I frame corresponding with the broadcasting moment after change.
In actual applications, the video positioning playing device of the embodiment of the present invention can be arranged at the end of the embodiment of the present invention
In the player of end equipment；Further, it is possible to exist as a plug-in unit of player, in order to install and transplant.
Change of above-mentioned broadcasting moment module 301, TS slicing files acquisition module 302, PES bag determine module 303 and play
Module 304, and PES bag determines that the target in module 303 is relatively play the moment and determined unit 331, determines list closest to PES bag
Unit 332 and take the implementation method that I frame PES bag determines the function of unit 333, is referred to the flow process as shown in above-mentioned Fig. 1-2 and walks
Rapid particular content, here is omitted.
In the embodiment of the present invention, determine the PES carrying I frame corresponding with the broadcasting moment after change in TS slicing files
Bag, illustrates to have oriented the I frame corresponding with the broadcasting moment after change, is equivalent to position in units of I frame, positioning precision
Can reach 0. more than zero second or several seconds of zero point, carry out positioning (positioning precision with existing in units of whole TS slicing files
For several seconds) compare, be greatly improved positioning precision, can be substantially reduced user change broadcasting moment rear video generation rollback or
The probability of the discrepancies such as advance, positioning precision can be comparable with the persistence of vision time of the mankind, so that user is becoming
Feel after more playing the moment that video image remains seamless link, thus be greatly promoted the experience of user.
And, it is not necessary to change existing TS slicing files and index file, it is not necessary to existing program server is changed
Make, it is not necessary to program server undertakes generation thumbnail or index file the extra work load such as be extended, without
Terminal unit increases the support of the index file to extension, it is possible to implement embodiments of the invention.Visible, the enforcement of the present invention
Example, on the basis of promoting video positioning precision, also has good compatibility and portability, and the scope of application is wider.
Those skilled in the art of the present technique are appreciated that the present invention includes relating to perform in operation described herein
One or more equipment.These equipment can be required purpose and specialized designs and manufacture, or can also include general
Known device in computer.These equipment have storage computer program within it, and these computer programs are optionally
Activate or reconstruct.Such computer program can be stored in equipment (such as, computer) computer-readable recording medium or be stored in
In being suitable to store e-command and be coupled to any kind of medium of bus respectively, described computer-readable medium include but not
Be limited to any kind of dish (including floppy disk, hard disk, CD, CD-ROM and magneto-optic disk), ROM (Read-Only Memory, only
Read memorizer), RAM (Random Access Memory, memorizer immediately), EPROM (Erasable Programmable
Read-Only Memory, Erarable Programmable Read only Memory), EEPROM (Electrically Erasable
Programmable Read-Only Memory, EEPROM), flash memory, magnetic card or light line card
Sheet.It is, computer-readable recording medium includes by equipment (such as, computer) with the form storage that can read or any Jie of transmission information
Matter.
Those skilled in the art of the present technique be appreciated that can with computer program instructions realize these structure charts and/or
The combination of the frame in each frame in block diagram and/or flow graph and these structure charts and/or block diagram and/or flow graph.This technology is led
Field technique personnel be appreciated that these computer program instructions can be supplied to general purpose computer, special purpose computer or other
The processor of programmable data processing method realizes, thus by computer or the process of other programmable data processing methods
Device performs the scheme specified in structure chart disclosed by the invention and/or block diagram and/or the frame of flow graph or multiple frame.
Those skilled in the art of the present technique be appreciated that the various operations discussed in the present invention, method, in flow process
Step, measure, scheme can be replaced, changed, combined or deleted.Further, there is discussed in the present invention each
Other steps in kind operation, method, flow process, measure, scheme can also be replaced, changed, reset, decomposed, combined or deleted.
Further, of the prior art have and the step in the various operations disclosed in the present invention, method, flow process, measure, scheme
Can also be replaced, changed, reset, decomposed, combined or deleted.
The above is only the some embodiments of the present invention, it is noted that for the ordinary skill people of the art
For Yuan, under the premise without departing from the principles of the invention, it is also possible to make some improvements and modifications, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (10)
1. a video positioning playing method, it is characterised in that including:
According to the alteration command playing the moment for video received, determine the broadcasting moment after change；
Obtain the TS slicing files belonging to the moment of the broadcasting after described change；
Determine the PES bag carrying I frame corresponding with the broadcasting moment after described change in described TS slicing files；
The I frame carried from the PES bag determined proceeds by broadcasting.
Method the most according to claim 1, it is characterised in that described in determine in described TS slicing files with described change
After play the PES bag carrying I frame corresponding to moment, including:
Determine the broadcasting moment after described change, the relative broadcasting on the basis of the initial broadcasting moment of described TS slicing files
In the moment, relatively play the moment as target；
Determine and relative with described target in described TS slicing files play moment immediate PES bag；
If it is determined that described immediate PES bag does not carries the head of I frame, then according to the arrangement represented by pts value in PES bag
Sequentially, unwrapping the beginning from the PES packing tightly neighbour with described immediate PES and search other PES bags successively, carrying I frame until finding
The PES bag of head, as with play the PES bag carrying I frame corresponding to moment after described change.
Method the most according to claim 2, it is characterised in that described in determine in described TS slicing files with described target
Relatively play moment immediate PES bag, specifically include:
Playing duration according to described TS slicing files and the number of TS bag, determine in described TS slicing files with described target
Relatively play moment immediate TS bag；
Periodically revise described immediate TS bag；The described correction in one of them cycle includes:
The PES bag each carried according to the first TS bag in described TS slicing files and presently described immediate TS bag
PTS, determines that the reality of presently described immediate TS bag is play the moment relatively；
Determine that described reality plays the moment difference of playing moment relative with described target relatively, if less than the time difference preset
Threshold value；The most then by the PES bag involved by presently described immediate TS bag, it is defined as relative with described target playing the moment
Immediate PES bag；After otherwise redefining described immediate TS bag according to described difference, carry out the described of next cycle
Revise.
Method the most according to claim 3, it is characterised in that described according to immediate TS described in described difference correction
Bag, specifically includes:
According to the average playing duration of described difference Yu described TS bag, determine the number of TS bag corresponding to described difference；
According to the number of TS bag corresponding to described difference, redefine described immediate TS bag.
Method the most according to claim 3, it is characterised in that described by involved by presently described immediate TS bag
PES bag, is defined as relative with described target playing moment immediate PES bag, specifically includes:
For described presently described immediate TS bag, however, it is determined that go out the packet header carrying PES bag in this TS bag, then by this TS bag
The PES bag related to plays moment immediate PES bag as relative with described target；Detect the TS bag closed on the most one by one, directly
To the TS bag in the packet header carrying PES bag being detected, the PES bag involved by TS bag that will detect is broadcast as relative with described target
Put moment immediate PES bag.
Method the most according to claim 3, it is characterised in that described in determine in described TS slicing files with described target
Relatively play moment immediate TS bag, specifically include:
Determine the TS bag play moment corresponding set point in relative with described target in described TS slicing files；
According to the PTS in the PES bag that TS bag each in described set point each carries, each TS bag in determining described set point
Reality relatively play the moment；
Select actual relatively to play the moment and relative with described target play the TS bag that between the moment, difference is minimum, as with described mesh
Mark plays moment immediate TS bag relatively.
7. according to the method described in any one of claim 1-6, it is characterised in that the broadcasting moment after the described change of described acquisition
Affiliated TS slicing files, including:
Determine that the TS slicing files belonging to the moment of playing after described change has been buffered in this equipment the most；The most direct
Obtain described TS slicing files；Otherwise according to the file of TS slicing files described in the index file of the described video obtained in advance
Mark, obtains described TS slicing files by downloading.
8. a video positioning playing device, it is characterised in that including:
Play moment change module, for according to the alteration command playing the moment for video received, determining change
After the broadcasting moment；
TS slicing files acquisition module, the TS slicing files belonging to the moment of the broadcasting after obtaining described change；
PES bag determines module, for determine in described TS slicing files with after described change play the moment corresponding carry I
The PES bag of frame；
From described PES bag, playing module, for determining that the I frame the PES bag that module is determined proceeds by broadcasting.
Device the most according to claim 8, it is characterised in that described PES bag determines that module includes:
Target is relatively play the moment and is determined unit, and the broadcasting moment after determining described change, with described TS slicing files
Initial broadcasting the moment on the basis of relatively play the moment, relatively play the moment as target；
Determine unit closest to PES bag, be used for determining and relative with described target in described TS slicing files play the moment and connect most
Near PES bag；
Take I frame PES bag and determine unit, for if it is determined that described immediate PES bag does not carries the head of I frame, then basis
Putting in order represented by pts value in PES bag, unwraps the beginning from the PES packing tightly neighbour with described immediate PES and searches other successively
PES bag, until finding the PES bag of the head carrying I frame, carries I frame as corresponding with the broadcasting moment after described change
PES bag.
Device the most according to claim 9, it is characterised in that
Described closest to PES bag determine unit specifically for the playing duration according to described TS slicing files and the number of TS bag,
Determine and relative with described target in described TS slicing files play moment immediate TS bag；Periodically revise described closest
TS bag；The described correction in one of them cycle includes: according to the first TS bag in described TS slicing files and presently described
The PTS of the PES bag that immediate TS bag each carries, determines when the reality of presently described immediate TS bag is play relatively
Carve；Determine that described reality plays the moment difference of playing moment relative with described target relatively, if less than the time difference preset
Threshold value；The most then by the PES bag involved by presently described immediate TS bag, it is defined as relative with described target playing the moment
Immediate PES bag；Otherwise according to described difference, after redefining described immediate TS bag, carry out the institute of next cycle
State correction.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610556181.5A CN106131660B (en) | 2016-07-15 | 2016-07-15 | Video location playback method and device |
Applications Claiming Priority (1)
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|---|---|---|---|
| CN201610556181.5A CN106131660B (en) | 2016-07-15 | 2016-07-15 | Video location playback method and device |
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| CN106131660B CN106131660B (en) | 2019-08-09 |
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| CN108769830A (en) * | 2018-05-29 | 2018-11-06 | 武汉斗鱼网络科技有限公司 | A kind of method and relevant device of buffered video |
| CN109120989A (en) * | 2018-10-08 | 2019-01-01 | 四川长虹电器股份有限公司 | The method of retrospect positioning when TS stream broadcasting |
| CN110445954A (en) * | 2019-07-26 | 2019-11-12 | 腾讯科技（深圳）有限公司 | Image-pickup method, device and electronic equipment |
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| CN115002505A (en) * | 2022-08-02 | 2022-09-02 | 广州市千钧网络科技有限公司 | Time shift control method and device for interrupting reconnected live stream |
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