CN105245880B - Video file cutting method and distributed trans-coding method - Google Patents
Video file cutting method and distributed trans-coding method Download PDFInfo
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Abstract
This application discloses a kind of video file cutting method and distributed trans-coding method.Video file cutting method for distributed trans-coding includes：Receive source file；The received source file is docked to be demultiplexed to obtain video file and audio file；The video file is split in units of GOP to obtain segmentation backsight frequency file；Calculate the duration for the segmentation backsight frequency file that more transcoding computers are handled respectively；According to the duration of the segmentation backsight frequency file for every transcoding computer disposal being calculated, the segmentation backsight frequency file is calculated；And the video file after the segmentation is sent to corresponding transcoding computer according to the result of calculation.The video file cutting method and distributed trans-coding method that the application proposes cause every transcoding computer as far as possible while complete transcoding operation, save the transcoding time, improve the transcoding efficiency of distributed trans-coding.
Description
Technical field
This application involves Video processing, more particularly, to a kind of video file cutting method and distributed trans-coding side
Method.
Background technology
In recent years, as the development of high-definition audio and video, the species of video format are more and more.Since audio and video player is to video
Limitation that form is supported, can, it is necessary to carry out transcoding to the video file of different-format using video format switching software
Enough operations smooth on a player.Video format transfer principle is that video is decoded by video format coding criterion, then
Recompiled according to object format coding criterion.More preferable image quality, more advanced volume are obtained at the same time in order to reduce data volume
Code technology is used, such as H.264 coding techniques.However, similar this advanced coding techniques needs to consume more computings
Ability, according to current high-end processors computing capability, separate unit processor is unable to the advanced pressure of complete independently HD video all the way
Reduce the staff code.In general, people can be solved the above problems by the way of hardware-compressed, meet the requirement of real-time coding.But hardware
Coding is obviously not so good as soft coding mode in the flexibility of application, can not meet in the application to the need of efficient super real-time transcoding
Ask.Distributed coding technology is come into being, it is cooperateed with using multiple processors and carries out data processing, realizes flexible volume in real time
Code ability, can also be directed to different applications, carry out efficiently super real-time video code conversion.
Video file is exactly carried out cutting by the first step for implementing distributed trans-coding, to pass in other multiple processors
Carry out collaboration transcoding.However, if video file cutting obtains bad, it is different to distribute to the data volume of each processor, may result in
Transcoding finishes some processors, and other processors handle relatively slow and do not complete the situation of transcoding also, so that
The overall end time of transcoding is elongated, and influences transcoding efficiency.
In view of this, the present invention provides a kind of video file cutting method and distributed trans-coding method, above-mentioned to solve
Problem.
The content of the invention
The video file cutting method of the application includes：Receive source file；The received source file is docked to be demultiplexed
With obtaining video file and audio file；The video file is split in units of GOP to obtain segmentation backsight frequency file；
Calculate the duration for the segmentation backsight frequency file that more transcoding computers are handled respectively；According to every transcoding meter being calculated
The duration of the segmentation backsight frequency file of calculation machine processing, the segmentation backsight frequency file is calculated；And foundation
Video file after the segmentation is sent to corresponding transcoding computer by the result of calculation.
Preferably, H.264 the form of the video file is.
Preferably, the more transcoding computers are N platform transcoding computers, and n-th transcoding computer has CNn free time
Processor, the corresponding dominant frequency of each processor is Fn, when a length of T of the video file, n-th transcoding computer disposal
It is described segmentation backsight frequency file it is described when a length of Tn, wherein1≤n≤N, N
For positive integer, CNn is positive integer.
Preferably, the segmentation backsight frequency file in units of GOP is combined according to Tn.
Preferably, the step of being split to obtain the segmentation backsight frequency file to the video file in units of GOP
Including：Split since the frame head of GOP in units of GOP.
The distributed trans-coding method of the application includes：Receive source file；The received source file is docked to be demultiplexed
Obtain video file and audio file；The video file is split in units of GOP to obtain segmentation backsight frequency file；Meter
Calculate the duration for the segmentation backsight frequency file that more transcoding computers are handled respectively；Calculated according to every transcoding being calculated
The duration of the segmentation backsight frequency file of machine processing, the segmentation backsight frequency file is calculated；According to the meter
Calculate result and the video file after the segmentation is sent to corresponding transcoding computer；Transcoding is carried out to the audio file to obtain
Audio file after transcoding；Video file after more transcoding computers reception transcoding；And by after the transcoding
Video file after audio file and the transcoding is multiplexed, and obtains output file.
Preferably, H.264 the form of the video file is.
Preferably, the more transcoding computers are N platform transcoding computers, and n-th transcoding computer has CNn free time
Processor, the corresponding dominant frequency of each processor is Fn, when a length of T of the video file, n-th transcoding computer disposal
It is described segmentation backsight frequency file it is described when a length of Tn, wherein1≤n≤N, N
For positive integer, CNn is positive integer.
Preferably, the step of being split to obtain the segmentation backsight frequency file to the video file in units of GOP
Including：Split since the frame head of GOP in units of GOP.
Preferably, the audio file after transcoding obtains the transcoding is carried out to the audio file in local.
Video file cutting method proposed by the present invention and distributed trans-coding method, have the following advantages：
1) its corresponding segmentation backsight frequency file is distributed to every transcoding computer, may be such that every transcoding computer to the greatest extent may be used
Transcoding operation can be completed at the same time.
2) the transcoding time is saved, so as to improve the transcoding efficiency of distributed trans-coding.
Certainly, implementing the either method of the application must be not necessarily required to reach all the above technique effect at the same time.
Brief description of the drawings
Attached 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 is the flow diagram of the video file cutting method for distributed trans-coding of one embodiment of the application；
Fig. 2 is the flow diagram of the distributed trans-coding method of one embodiment of the application.
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 " include but do not limit
In "." substantially " refer in receivable error range, those skilled in the art can be described within a certain error range solution
Technical problem, basically reaches the technique effect.Specification subsequent descriptions are so described to implement the better embodiment of the application
Description is for the purpose of the rule for illustrating the application, is not limited to scope of the present application.The protection domain of the application
When subject to appended claims institute defender.
Fig. 1 is the flow diagram of the video file cutting method of one embodiment of the application.As shown in Figure 1, including following
Step：
Step 101, source file is received.
In one embodiment of this invention, source file is the audio of the video comprising H.264 form and specific coding form.
It is noted that the present invention is not intended to limit the coded format of audio, for example, in one embodiment of this invention, audio coding lattice
Formula can be AAC-LC coded formats.
Step 102, received source file is docked to be demultiplexed.
In one embodiment of this invention, dock received source file to be demultiplexed, obtain video file and audio text
Part.For example, source file for the video comprising H.264 form and AAC-LC coded formats audio when, what step 102 obtained is
H.264 the video file of form and the audio file of AAC-LC coded formats.
Step 103, video file is split in units of GOP to obtain segmentation backsight frequency file.
In one embodiment of this invention, the video file of the H.264 form obtained to decoding is split, to send
Transcoding processing is carried out to multiple transcoding computers.Specifically, with picture group (Group of Pictures, GOP) for unit to regarding
Frequency file is split.One GOP includes one group of continuous picture, contains I frames, P frames or B frames.To the video of H.264 form
When file is split, segmentation need to be since the frame head of GOP, otherwise, it will the feelings that former frames cannot carry out H.265 transcoding occurs
Condition.For H.264 form, frame head can be searched, if frame type is shown as every IDR frame, is shown to be the frame head of GOP, from that point on
Split in units of GOP.
Step 104, the duration for the segmentation backsight frequency file that more transcoding computers are handled respectively is calculated.
After video file is split in units of GOP, segmentation backsight frequency file is sent to multiple transcoding computers
Carry out distribution transcoding.In order to enable multiple transcoding computer capacities synchronously complete transcoding, the duration of its allocated video file will
Depending on the configuration of transcoding computer.In one embodiment of this invention, according to the idle transcoding computer in LAN
The configuring condition of processor calculates the duration of treatable segmentation backsight frequency file.
If for example, there is N platform free time transcoding computers in LAN, n-th transcoding computer has CNn idle processing
Device, the corresponding dominant frequency of each processor are Fn, the when a length of T for the video file that step 102 decoding obtains, and n-th transcoding calculates
When a length of Tn of the treatable segmentation backsight frequency file of machine, wherein1≤n≤
N, N are positive integer, and CNn is positive integer.
As described above, the duration for the video file that every transcoding computer can carry out transcoding processing can be calculated.
Step 105, the duration according to the treatable segmentation backsight frequency file of every transcoding computer being calculated, will be with
GOP is that the segmentation backsight frequency file after unit segmentation is calculated.
In one embodiment of this invention, video file is split in units of GOP to obtain segmentation backsight frequency file,
For example, the video file of the duration H.264 form of 45 minutes, after being split in units of GOP, becomes with M GOP
The segmentation backsight frequency file of unit time.At this time, the treatable segmentation backsight frequency file of every transcoding computer has been calculated
Duration, according to the duration, the segmentation backsight frequency file with M GOP unit time is calculated, be combined into has respectively
Video file after N number of segmentation of MN GOP unit time of M1, M2 ..., wherein N are the quantity of transcoding computer.
Step 106, the video file after segmentation is sent to corresponding transcoding computer according to result of calculation.
In this way, distributing its corresponding segmentation backsight frequency file to every transcoding computer, every transcoding computer may be such that
Complete transcoding operation at the same time.
Fig. 2 is the flow diagram of the distributed trans-coding method of one embodiment of the application.As shown in Fig. 2, including following step
Suddenly：
Step 201, source file is received.
In one embodiment of this invention, source file is the audio of the video comprising H.264 form and specific coding form.
It is noted that the present invention is not intended to limit the coded format of audio, for example, in one embodiment of this invention, audio coding lattice
Formula can be AAC-LC coded formats.
Step 202, received source file is docked to be demultiplexed.
In one embodiment of this invention, dock received source file to be demultiplexed, obtain video file and audio text
Part.For example, source file for the video comprising H.264 form and AAC-LC coded formats audio when, what step 102 obtained is
H.264 the video file of form and the audio file of AAC-LC coded formats.
Step 203, video file is split in units of GOP to obtain segmentation backsight frequency file.
In one embodiment of this invention, the video file of the H.264 form obtained to decoding is split, to send
Transcoding processing is carried out to multiple transcoding computers.Specifically, with picture group (Group of Pictures, GOP) for unit to regarding
Frequency file is split.One GOP includes one group of continuous picture, contains I frames, P frames or B frames.To the video of H.264 form
When file is split, segmentation need to be since the frame head of GOP, otherwise, it will the feelings that former frames cannot carry out H.265 transcoding occurs
Condition.For H.264 form, frame head can be searched, if frame type is shown as every IDR frame, is shown to be the frame head of GOP, from that point on
Split in units of GOP.
Step 204, the duration of the treatable segmentation backsight frequency file of more transcoding computers is calculated.
After video file is split in units of GOP, segmentation backsight frequency file is sent to multiple transcoding computers
Carry out distribution transcoding.In order to enable multiple transcoding computer capacities synchronously complete transcoding, the duration of its allocated video file will
Depending on the configuration of transcoding computer.In one embodiment of this invention, according to the idle transcoding computer in LAN
The configuring condition of processor calculates the duration of treatable segmentation backsight frequency file.
If for example, there is N platform free time transcoding computers in LAN, n-th transcoding computer has CNn idle processing
Device, the corresponding dominant frequency of each processor are Fn, the when a length of T for the video file that step 102 decoding obtains, and n-th transcoding calculates
When a length of Tn of the treatable segmentation backsight frequency file of machine, wherein1≤n≤
N, N are positive integer.
As described above, the duration for the video file that every transcoding computer can carry out transcoding processing can be calculated.
Step 205, the duration according to the treatable segmentation backsight frequency file of every transcoding computer being calculated, will be with
GOP is that the video file after unit segmentation is calculated.
In one embodiment of this invention, video file is split in units of GOP to obtain segmentation backsight frequency file,
For example, the video file of the duration H.264 form of 45 minutes, after being split in units of GOP, becomes with M GOP
The segmentation backsight frequency file of unit time.At this time, the treatable segmentation backsight frequency file of every transcoding computer has been calculated
Duration, according to the duration, the segmentation backsight frequency file with M GOP unit time is calculated, be combined into has respectively
Video file after N number of segmentation of MN GOP unit time of M1, M2 ..., wherein N are the quantity of transcoding computer.
Step 206, the video file after segmentation is sent to corresponding transcoding computer according to result of calculation.
Step 207, the audio file after transcoding obtains transcoding is carried out to audio file.
In one embodiment of this invention, the audio file after transcoding obtains transcoding is carried out to audio file in local.
Step 208, from the video file after more transcoding computers reception transcodings.
In one embodiment of this invention, the process that transcoding computer carries out transcoding is the video after the received segmentation of docking
H.264, file is decoded, and obtains yuv data, and finally progress x65 encodes to obtain the video file after the H.265 transcoding of form.
Step 209, the video file after the audio file and transcoding after transcoding is multiplexed, obtains output file.
It may be noted that the present invention is not intended to limit the operation order of step 207, according to design requirement, can in step 203,
204th, carried out before or after 205,206,208 wherein any one steps.
As above, its corresponding segmentation backsight frequency file is distributed to every transcoding computer, may be such that every computer at the same time
Transcoding operation is completed, therefore transcoding backsight frequency file can be received at the same time, so saves the transcoding time, so as to improve distributed turn
The transcoding efficiency of code.
Therefore had the following advantages compared to conventional method, the present invention：
1) its corresponding segmentation backsight frequency file is distributed to every transcoding computer, may be such that every transcoding computer to the greatest extent may be used
Transcoding operation can be completed at the same time.
2) the transcoding time is saved, so as to improve the transcoding efficiency of distributed trans-coding.
It should be noted that the transcoding computer in the present invention is any equipment with transcoding computing capability, in the present invention
The processor of transcoding computer can be central processing unit, general processor, digital signal processor etc..
It should be noted that term " comprising ", "comprising" or its any other variant are intended to the bag of nonexcludability
Contain, so that process, method, commodity or system including a series of elements not only include those key elements, but also including
Other elements that are not explicitly listed, or further include as this process, method, commodity or the intrinsic key element of system.
In the absence of more restrictions, the key element limited by sentence "including a ...", it is not excluded that including the key element
Process, method, also there are other identical element in commodity or system.
The foregoing is merely embodiments herein, is not limited to the application.For those skilled in the art
For, the application can have various modifications and variations.All any modifications made within spirit herein and principle, be equal
Replace, improve etc., it should be included within the scope of claims hereof.
Claims (10)
- A kind of 1. video file cutting method, it is characterised in that including：Receive source file；The received source file is docked to be demultiplexed to obtain video file and audio file；The video file is split in units of GOP to obtain segmentation backsight frequency file；Calculate the duration for the segmentation backsight frequency file that more transcoding computers are handled respectively；According to the duration of the segmentation backsight frequency file for every transcoding computer disposal being calculated, by the segmentation Backsight frequency file is calculated；AndThe video file after the segmentation is sent to corresponding transcoding computer according to the result of calculation.
- 2. video file cutting method as claimed in claim 1, it is characterised in that the H.264 form of the video file is.
- 3. video file cutting method as claimed in claim 1, it is characterised in that the more transcoding computers turn for N platforms Code computer, n-th transcoding computer have the processor of CNn free time, and the corresponding dominant frequency of each processor is Fn, described to regard When a length of T of frequency file, the segmentation backsight frequency file of n-th transcoding computer disposal it is described when a length of Tn, wherein1≤n≤N, N are positive integer, and CNn is positive integer.
- 4. video file cutting method as claimed in claim 3, it is characterised in that foundation Tn is by described in units of GOP Segmentation backsight frequency file is combined.
- 5. video file cutting method as claimed in claim 1, it is characterised in that to the video file in units of GOP Split to include the step of obtaining the segmentation backsight frequency file：Split since the frame head of GOP in units of GOP.
- A kind of 6. distributed trans-coding method, it is characterised in that including：Receive source file；The received source file is docked to be demultiplexed to obtain video file and audio file；The video file is split in units of GOP to obtain segmentation backsight frequency file；Calculate the duration for the segmentation backsight frequency file that more transcoding computers are handled respectively；According to the duration of the segmentation backsight frequency file for every transcoding computer disposal being calculated, by the segmentation Backsight frequency file is calculated；The video file after the segmentation is sent to corresponding transcoding computer according to the result of calculation；The audio file after transcoding obtains transcoding is carried out to the audio file；Video file after more transcoding computers reception transcoding；AndAudio file after the transcoding and the video file after the transcoding are multiplexed, obtain output file.
- 7. distributed trans-coding method as claimed in claim 6, it is characterised in that the H.264 form of the video file is.
- 8. distributed trans-coding method as claimed in claim 6, it is characterised in that the more transcoding computers are N platform transcodings Computer, n-th transcoding computer have the processor of CNn free time, and the corresponding dominant frequency of each processor is Fn, the video When a length of T of file, the segmentation backsight frequency file of n-th transcoding computer disposal it is described when a length of Tn, wherein1≤n≤N, N are positive integer, and CNn is positive integer.
- 9. distributed trans-coding method as claimed in claim 6, it is characterised in that in units of GOP to the video file into Row segmentation obtain it is described segmentation backsight frequency file the step of include：Split since the frame head of GOP in units of GOP.
- 10. distributed trans-coding method as claimed in claim 6, it is characterised in that turn in local to the audio file Code obtains the audio file after the transcoding.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105763886A (en) * | 2016-03-01 | 2016-07-13 | 深圳市茁壮网络股份有限公司 | Distributed transcoding method and apparatus |
| CN106101710A (en) * | 2016-08-26 | 2016-11-09 | 珠海迈科智能科技股份有限公司 | A kind of distributed video transcoding method and device |
| CN107071449B (en) * | 2017-05-18 | 2019-12-03 | 北京数码视讯软件技术发展有限公司 | A kind of trans-coding system and method |
| CN107197295B (en) * | 2017-05-18 | 2019-11-29 | 北京数码视讯软件技术发展有限公司 | A kind of coded system and method |
| KR102006449B1 (en) | 2017-11-29 | 2019-08-01 | 네이버 주식회사 | Distributed transcoding method and distributed transcoding system |
| CN111246243A (en) * | 2020-01-15 | 2020-06-05 | 天脉拓道(北京)科技有限公司 | File encoding and decoding method and device, terminal and storage medium |
| CN115174578B (en) * | 2022-07-25 | 2023-10-20 | 上海网达软件股份有限公司 | Kubernetes-based on-demand parallel transcoding method, device and storage medium |
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