CN105208463B - The method and system of frame determination is carried out for m3u8 files - Google Patents
The method and system of frame determination is carried out for m3u8 files Download PDFInfo
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- CN105208463B CN105208463B CN201510549966.5A CN201510549966A CN105208463B CN 105208463 B CN105208463 B CN 105208463B CN 201510549966 A CN201510549966 A CN 201510549966A CN 105208463 B CN105208463 B CN 105208463B
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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
- H04N21/83—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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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/60—Network streaming of media packets
- H04L65/61—Network streaming of media packets for supporting one-way streaming services, e.g. Internet radio
- H04L65/612—Network streaming of media packets for supporting one-way streaming services, e.g. Internet radio for unicast
Abstract
This application discloses a kind of method and system that frame determination is carried out for m3u8 files, this method determines to be segmented where seek points according to the segmented mode of m3u8 files；Demultiplex, find out and the immediate front and rear key frame of seek points the starting keyframe of video where the seek points in segmentation, preserve code stream paragraph of the front and rear key frame nearest with the seek points for starting；Decoding is proceeded by from the starting keyframe of the code stream paragraph preserved, the solution frame code of not up to seek points is abandoned, until the solution frame code for reaching seek points then retains for Video Rendering.The present invention can solve the problem that when slider bar dragging is carried out in user video on-demand process, it is impossible to reach accurate time location, it is necessary to the problem of playing the relatively long time and can be only achieved precalculated position.
Description
Technical field
The present invention relates to streaming media communication technical field, to the fine control of seek operations more particularly in video request-program process
System.A kind of more particularly it relates to method and system that accurate frame determination is carried out for m3u8 files.
Background technology
OTT mobile video services based on open the Internet be in the future meet live (Live), program request (OnDemand) with
And one of best solution of many application demands such as time shift (TimeShift).OTTTV is the contracting of " OverTheTopTV "
Write, refer to the Video service based on open the Internet, playback terminal can be television set, computer, set top box, PAD, smart mobile phone
Etc..Mean to provide service on network, emphasize service and the independence of physical network.Common practice is according to one at present
Media data segmentation is packaged into different single files by fixed time interval, different media coding formats and code check size,
Referred to as it is segmented, all fragmented storages is then stored in one in service end, the information such as each segmentation and its time span
In M3U8 formatted files, M3U8 index files are a kind of defined description file, also referred to as M3U8 description texts in HLS protocol
Part, M3U8 files refer to the M3U files of UTF-8 coded formats.M3U files are to have recorded an index text-only file, M3U8
Media file is described with text mode for file, is made up of a series of labels, and playout software is not to play when opening it
It, but the network address of audio-video document is played online according to corresponding to being found its index；During broadcasting, service end will
The formatted file is transferred to client, and requirement (such as Seek behaviour is operated according to currently playing time location or user by client
Make) from the service end segmental file specified of request and broadcasting.
Ideally, M3U8 is an index file, when containing video playback file be that ts flows encapsulation format, pure audio can
Think adts encapsulation format, advantage live to Stochastic accessing can be brought using segmented mode.
But in actual conditions, M3U8 files may also be used for carrying out program request, turn when by the video format such as MP4, FLV file
Change into when, its segmental file may it is larger, such as one segmentation exist 20 seconds, when in user's on-demand process carry out slider bar dragging
When, it is impossible to reach accurate time location, it is necessary to playing the relatively long time can be only achieved precalculated position, influence user's body
Test.
The content of the invention
In view of this, technical problems to be solved in this application there is provided a kind of m3u8 files that are directed to and carry out frame determination
Method and system, when it can solve the problem that progress slider bar dragging in user video on-demand process, it is impossible to meta when reaching accurate
Put, it is necessary to the problem of playing the relatively long time and can be only achieved precalculated position, present invention seek to address that problems, were dragged
Journey can reach ideal position rapidly, be waited without user, improve Consumer's Experience.
In order to solve the above-mentioned technical problem, the application has following technical scheme：
A kind of method that frame determination is carried out for m3u8 files, comprises the following steps：
According to the segmented mode of m3u8 files, determine to be segmented where seek points；
Demultiplexed the starting keyframe of video where the seek points in segmentation, find out with seek points it is immediate before
Key frame afterwards, preserve code stream paragraph of the front and rear key frame nearest with the seek points for starting；
Decoding is proceeded by from the starting keyframe of the code stream paragraph preserved, the solution frame code of not up to seek points is lost
Abandon, until the solution frame code for reaching seek points then retains for Video Rendering.
Preferably, wherein, demultiplexed the starting keyframe of the video where the seek points in segmentation, find out with
The immediate front and rear key frame of seek points, preserve where the front and rear key frame nearest with the seek points using key frame to originate
Code stream paragraph include：
Demultiplexed the first key frame where the seek points in segmentation, preserve the first key frame and the second key frame it
Between code stream paragraph；
Detect when running into the second key frame and finding to be not up to seek points, abandon the first key frame and the second key frame it
Between code stream paragraph, demultiplexed since the second key frame, preserve the code stream paragraph between the second key frame and the 3rd key frame,
Continue detection and run into whether follow-up key frame finds to reach seek points and whether abandon corresponding code stream paragraph,
Until finding to reach seek points, the front and rear key frame of the code stream paragraph for confirming finally to preserve be with the seek points recently before and after
Key frame.
Preferably, wherein, also comprise the following steps：
Demultiplexed since the start frame of the audio where seek points in segmentation, the audio code stream of not up to seek points is lost
Abandon, the audio code stream until reaching seek points is then preserved for audio decoder and rendered.
The invention also discloses a kind of system that frame determination is carried out for m3u8 files, it is characterised in that including：
Computing module, configure with the segmented mode according to m3u8 files, determine to be segmented where seek points；
Demultiplexing detection module, configure with since the starting keyframe of the video where identified seek points in segmentation
Demultiplexing, find out and the immediate front and rear key frame of seek points；
Memory module, configure to preserve code stream paragraph of the front and rear key frame nearest with the seek points as starting；
Decoder module, configure and decoding is proceeded by with the starting keyframe from the code stream paragraph preserved, by not up to
The solution frame code of seek points abandons, until the solution frame code for reaching seek points is then preserved for Video Rendering.
Preferably, wherein, the demultiplexing detection module and the memory module are configured to：The demultiplexing module is from
One key frame starts to demultiplex, and the memory module preserves the code stream paragraph between the first key frame and the second key frame, institute in advance
When stating demultiplexing detection module and detecting to run into the second key frame and find to be not up to seek points, the memory module abandons first and closed
Code stream paragraph between key frame and the second key frame, the demultiplexing detection module demultiplexes since the second key frame, described
Memory module preserves the code stream paragraph between the second key frame and the 3rd key frame, and the demultiplexing detection module continues detection and met
To follow-up key frame whether find to reach seek points and whether memory module abandons corresponding code stream paragraph, until finding
Reach seek points, the front and rear key frame for confirming the code stream paragraph that memory module finally preserves be with the seek points recently before and after
Key frame.
Preferably, wherein,
The demultiplexing detection module demultiplexes also configuring with the start frame of the audio where seek points in segmentation,
The audio code stream of not up to seek points is abandoned, the audio code stream until reaching seek points is then preserved for audio decoder and rendered；
The decoder module is also configured to decode the audio code stream of seek points.
Compared with prior art, method and system described herein, following effect has been reached：
Solves the problems, such as the specific accurate frame that can not be accurate to video by m3u8 in the prior art.Due to every segment
Ts stream files are smaller, are locally demultiplexed using the method for the present invention and the time of decoding can be ignored substantially, user is easy to drag
Dynamic (slip) bar that rolls reaches ideal point, finds desired video content.
Brief description of the drawings
Accompanying drawing described herein is used for providing further understanding of the present application, forms the part of the application, this Shen
Schematic description and description please is used to explain the application, does not form the improper restriction to the application.In the accompanying drawings：
Fig. 1 shows the flow chart of the method according to an embodiment of the invention that frame determination is carried out for m3u8 files；
Fig. 2 shows a kind of detailed execution figure of embodiment of the step S102 in the method in Fig. 1；
Fig. 3 shows the flow chart of the method according to another embodiment of the present invention that frame determination is carried out for m3u8 files；
Fig. 4 shows the flow chart for the method that frame determination is carried out for the m3u8 files containing pure audio；
Fig. 5 shows the schematic diagram of the method for the m3u8 files application present invention of a specific embodiment；
Fig. 6 shows the system that frame determination is carried out for m3u8 files according to the present invention.
Embodiment
Some vocabulary has such as been used to censure specific components among specification and claim.Those skilled in the art should
It is understood that hardware manufacturer may call same component with different nouns.This specification and claims are not with name
The difference of title is used as the mode for distinguishing component, but is used as the criterion of differentiation with the difference of component functionally.Such as logical
The " comprising " of piece specification and claim mentioned in is an open language, therefore should be construed to " including but do not limit
In ".Specification subsequent descriptions is implement the better embodiment of the application, and so the description is to illustrate the general original of the application
For the purpose of then, scope of the present application is not limited to.The protection domain of the application, which is worked as, regards appended claims institute defender
It is defined.
As shown in figure 1, being the method that frame determination is carried out for m3u8 files according to one embodiment of the invention, this method is outstanding
It is applied to video file, and the method comprises the following steps：
S101:According to the segmented mode of m3u8 files, determine to be segmented where seek points.
With reference to Fig. 5 example for example, m3u8 files have 3 segmentation, be each segmented when a length of 20 seconds, then (0,
19), (20,39), (40,59) are respectively 3 segmentations, if user wants to be dragged at 53 seconds during playing video, basis point
Segmented mode, it may be determined that the seek points of 53 seconds are in the 3rd segmentation.
S102:Demultiplexed since the starting keyframe of the video where seek points in segmentation, find out and most connect with seek points
Near front and rear key frame, preserve the code stream section using key frame as starting where the front and rear key frame nearest with the seek points
Fall.
Reference picture 5, in the 3rd segmentation, 40,45,50,55 small flag represents the position where key frame respectively, specifically
The position of key frame is random in material, and this example is for reference only.From each key frame 40 of the 3rd segmentation, 45,50,55
Key frame 40 starts to demultiplex, and finds out and 53 immediate front and rear key frames 50,55, preservation GOP (50,54).
S103:Decoding is proceeded by from the starting keyframe of the code stream paragraph preserved, by the solution frame of not up to seek points
Code abandons, until the solution frame code for reaching seek points then retains for Video Rendering.
With reference to Fig. 5 example, video decodes to be started to decode from GOP (50, the 54) key frame of 50 seconds, by not up to 53 seconds
Decoding frame abandon, then start Video Rendering when reaching 53 seconds.
With continued reference to Fig. 2, on step S102 execution, following sub-step can be included:
S1021:Demultiplexed since the first key frame where seek points in segmentation, preserve the first key frame and second and close
Code stream paragraph between key frame；
S1022:Detect, when running into the second key frame discovery not up to seek points, to abandon the first key frame and second and close
Code stream paragraph between key frame, is demultiplexed since the second key frame, preserves the code between the second key frame and the 3rd key frame
Flow paragraph；
S1023:Continue detection and run into whether follow-up key frame finds to reach seek points and whether abandon corresponding code
Flow paragraph, until finding to reach seek points, the front and rear key frame of the code stream paragraph for confirming finally to preserve be with the seek points most
Near front and rear key frame.
For example with reference to Fig. 5, step S1021~S023 is for example shown as：
First, demultiplexed since 40 seconds of the 3rd segmentation, GOP (40,44) is preserved, from being found not yet after running into 45 seconds
To the seek points position of 53 seconds, then abandon GOP (40,44), demultiplexed since 45 seconds, preserve with the GOP of starting in 45 seconds (45,
49), found after running into 50 seconds, not yet to the seek points position of 53 seconds, then abandon GOP (45,49), demultiplexed since 50 seconds
With preserving with the GOP (50,54) of starting in 50 seconds, until finding to run into the seek points of 53 seconds, be located at GOP (50,54) interior, it is determined that looking for
It is immediate key frame to 50 and 54, traversal terminates.
Pass through above-mentioned Fig. 1 and Fig. 2, it is found that method of the invention is to first open beginning demultiplexing from section, preserves GOP, runs into
During new GOP, the GOP (now not yet reaching seek points) before abandoning, start to decode until reaching immediate key frame, therefore
Immediate GOP is only preserved, is decoded since this GOP key frame, the decoding frame before reaching seek points all abandons, until
Seek points start normally to render.Therefore, the time for demultiplexing and decoding is considerably less, can be ignored substantially, can be rapid
Ground reaches ideal point.
Reference picture 3, is the method that frame determination is carried out for m3u8 files according to another embodiment of the present invention, and this method is outstanding
It is applied to the file comprising video and audio simultaneously, comprises the following steps：
S201~S203:The implementation of this step is similar with above-mentioned S101~S103, will not be repeated here.
S202’：Demultiplexed since the start frame of the audio where seek points in segmentation, by the audio of not up to seek points
Code stream abandons, and the audio code stream until reaching seek points is then preserved for decoding and rendered.
With reference to Fig. 5 example, S202 ' is shown as：Demultiplexed since 40 seconds, by 40~52 code stream of not up to 53 seconds
Abandon, the code stream until reaching 53 seconds, recover normal decoding and render.
Reference picture 4, to carry out the flow chart of the method for frame determination for the m3u8 files containing pure audio.
In view of the particularity of pure audio files, each frame where seek points in segmentation can be considered as key frame.
The above method comprises the following steps：
S301:According to the segmented mode of m3u8 files, determine to be segmented where seek points.The implementation of the step and above-mentioned S101
It is similar, it will not be repeated here.
S302:Demultiplexed since the start frame in each frame where seek points in segmentation, by the code of not up to seek points
Stream abandons, and the code stream until reaching seek points is then preserved for decoding and rendered.
Similarly, with reference to Fig. 5 example, show as：Demultiplexed since 40 seconds, by 40~52 code of not up to 53 seconds
Stream abandons, the code stream until reaching 53 seconds, recovers normal decoding and renders.
The above method of the present invention, it is original if wanting to drag at 53 seconds during client playing compared to prior art
Method be it is direct reach at the 3rd segmentation, i.e., at 40 seconds decode and play, until broadcast point reached at 53 seconds, that is, need
The time of 13 seconds (53-40) such as clients is allowed to get to preferable broadcast point, the operation that method of the invention determines for frame
More accurate, video and audio can quickly reach ideal point.
The above-mentioned method relevant with embodiment shown in Fig. 1, reference picture 6, can be practiced with the system according to the present invention.
System for carrying out frame determination in m3u8 files, including：
Computing module, configure with the segmented mode according to m3u8 files, determine to be segmented where seek points；
Demultiplexing detection module, configure with since the starting keyframe of the video where identified seek points in segmentation
Demultiplexing, find out and the immediate front and rear key frame of seek points；
Memory module, configure to preserve code stream paragraph of the front and rear key frame nearest with the seek points as starting；
Decoder module, configure and decoding is proceeded by with the starting keyframe from the code stream paragraph preserved, by not up to
The solution frame code of seek points abandons, until the solution frame code for reaching seek points is then preserved for Video Rendering.
Wherein, for the configuration relation between memory module and demultiplexing detection module, such as can be further configured to：
The demultiplexing module demultiplexes since the first key frame, and the memory module preserves the first key frame and the second key frame in advance
Between code stream paragraph, it is described when the demultiplexing detection module detects to run into the second key frame and finds to be not up to seek points
Memory module abandons the code stream paragraph between the first key frame and the second key frame, and the demultiplexing detection module is crucial from second
Frame starts to demultiplex, and the memory module preserves the code stream paragraph between the second key frame and the 3rd key frame, the demultiplexing
Detection module continues whether the follow-up key frame that detection runs into finds whether reach seek points and the memory module abandons
Corresponding code stream paragraph, until finding to reach seek points, confirm the front and rear key frame for the code stream paragraph that memory module finally preserves
For the front and rear key frame nearest with the seek points.
The above-mentioned method relevant for the embodiment shown in Fig. 3, can the following system of the present invention be practiced (such as can be with
Reference picture 6).
System for carrying out frame determination in m3u8 files, including：
Computing module, configure with the segmented mode according to m3u8 files, determine to be segmented where seek points；
Demultiplexing detection module, configure with：The starting keyframe of video where from identified seek points in segmentation is opened
Begin demultiplexing, finds out the front and rear key frame with the immediate video of seek points；The starting of audio where from seek points in segmentation
Frame starts to demultiplex, and the audio code stream of not up to seek points is abandoned, until the audio code stream for reaching seek points is then preserved for
Decoding；
Memory module, configure to preserve the code stream section with the front and rear key frame of the nearest video of the seek points as starting
Fall；
Decoder module, configure and decoding is proceeded by with the starting keyframe from the video code flow paragraph preserved, will not reach
Solution frame code to seek points abandons, until the solution frame code for reaching seek points is then preserved for Video Rendering；Decode the sound of seek points
Frequency code stream.
Wherein, if the operation object of system is pure audio files, the demultiplexing detection module of system can be configured to only
Demultiplexed since the start frame of the audio where seek points in segmentation, the audio code stream of not up to seek points is abandoned, until
The audio code stream for reaching seek points is then preserved for decoding；The memory module of system can not work, and decoder module can configure
Into the audio code stream for only decoding seek points.
It should be understood by those skilled in the art that, embodiments herein can be provided as method, apparatus or computer program
Product.Therefore, the application can use the reality in terms of complete hardware embodiment, complete software embodiment or combination software and hardware
Apply the form of example.Moreover, the application can use, in one or more, which includes the computer of computer usable program code
The computer program production that usable storage medium is implemented on (including but is not limited to magnetic disk storage, CD-ROM, optical memory etc.)
The form of product.
Some preferred embodiments of the application have shown and described in described above, but as previously described, it should be understood that the application
Be not limited to form disclosed herein, be not to be taken as the exclusion to other embodiment, and available for various other combinations,
Modification and environment, and above-mentioned teaching or the technology or knowledge of association area can be passed through in the scope of the invention is set forth herein
It is modified., then all should be in this Shen and the change and change that those skilled in the art are carried out do not depart from spirit and scope
Please be in the protection domain of appended claims.
Claims (4)
1. a kind of method that frame determination is carried out for m3u8 files, comprises the following steps：
According to the segmented mode of m3u8 files, determine to be segmented where seek points；
Demultiplex, find out and the immediate front and rear pass of seek points since the starting keyframe of the video where seek points in segmentation
Key frame, preserve code stream paragraph of the front and rear key frame nearest with the seek points for starting：
Demultiplex, preserved between the first key frame and the second key frame since the first key frame where seek points in segmentation
Code stream paragraph；
Detect, when running into the second key frame discovery not up to seek points, to abandon between the first key frame and the second key frame
Code stream paragraph, demultiplexed since the second key frame, preserve the code stream paragraph between the second key frame and the 3rd key frame,
Continue detection and run into whether follow-up key frame finds to reach seek points and whether abandon corresponding code stream paragraph, Zhi Daofa
Now reach seek points, the front and rear key frame for the code stream paragraph for confirming finally to preserve is the front and rear key nearest with the seek points
Frame；
Decoding is proceeded by from the starting keyframe of the code stream paragraph preserved, the solution frame code of not up to seek points is abandoned, directly
The solution frame code for reaching seek points then retains for Video Rendering.
2. according to the method for claim 1, it is characterised in that also comprise the following steps：
Demultiplexed since the start frame of the audio where seek points in segmentation, the audio code stream of not up to seek points abandoned,
Audio code stream until reaching seek points is then preserved for audio decoder and rendered.
A kind of 3. system that frame determination is carried out for m3u8 files, it is characterised in that including：
Computing module, configure with the segmented mode according to m3u8 files, determine to be segmented where seek points；
Demultiplexing detection module, demultiplexed configuring with the starting keyframe of the video where identified seek points in segmentation
With finding out and the immediate front and rear key frame of seek points；
Memory module, configure to preserve code stream paragraph of the front and rear key frame nearest with the seek points as starting；
The demultiplexing detection module and the memory module are configured to：The demultiplexing module demultiplexes since the first key frame
With the memory module preserves the code stream paragraph between the first key frame and the second key frame, the demultiplexing detection module in advance
When detecting that running into the second key frame finds to be not up to seek points, the memory module abandons the first key frame and the second key frame
Between code stream paragraph, the demultiplexing detection module demultiplexes since the second key frame, and the memory module preserves second
Code stream paragraph between key frame and the 3rd key frame, the demultiplexing detection module continue the follow-up key frame that detection runs into
Whether discovery reaches seek points and whether memory module abandons corresponding code stream paragraph, until finding to reach seek points, confirms to deposit
The front and rear key frame for the code stream paragraph that storage module finally preserves is the front and rear key frame nearest with the seek points；
Decoder module, configure and decoding is proceeded by with the starting keyframe from the code stream paragraph preserved, by not up to seek points
Solution frame code abandon, until the solution frame code for reaching seek points is then preserved for Video Rendering.
4. system according to claim 3, it is characterised in that
The demultiplexing detection module demultiplexes also configuring with the start frame of the audio where seek points in segmentation, will not
The audio code stream for reaching seek points abandons, and the audio code stream until reaching seek points is then preserved for audio decoder and rendered；It is described
Decoder module is also configured to decode the audio code stream of seek points.
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| CN108833968B (en) * | 2018-05-29 | 2021-09-07 | 武汉斗鱼网络科技有限公司 | Method for caching video and related equipment |
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| CN108924630B (en) * | 2018-05-29 | 2022-02-22 | 武汉斗鱼网络科技有限公司 | Method for displaying cache progress and playing device |
| CN110545459A (en) * | 2018-05-29 | 2019-12-06 | 武汉斗鱼网络科技有限公司 | method for caching video and related equipment |
| CN111436004B (en) * | 2019-01-11 | 2023-02-21 | 腾讯科技（深圳）有限公司 | Video playing method, device and equipment and computer readable storage medium |
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| CN110324727A (en) * | 2019-07-16 | 2019-10-11 | 浙江大华技术股份有限公司 | Computer readable storage medium, server and its method for responding playing request |
| CN115225970A (en) * | 2021-04-16 | 2022-10-21 | 海信视像科技股份有限公司 | Display device and video skipping method thereof |
| CN113395581B (en) * | 2021-06-15 | 2023-07-25 | 北京字跳网络技术有限公司 | Audio playing method and device, electronic equipment and storage medium |
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