CN105245880A - Video file cutting method and distributed transcoding method - Google Patents
Video file cutting method and distributed transcoding method Download PDFInfo
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- CN105245880A CN105245880A CN201510605359.6A CN201510605359A CN105245880A CN 105245880 A CN105245880 A CN 105245880A CN 201510605359 A CN201510605359 A CN 201510605359A CN 105245880 A CN105245880 A CN 105245880A
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Abstract
The invention discloses a video file cutting method for distributed transcoding, and a distributed transcoding method. The method comprises the steps: receiving a source file; carrying out the de-multiplexing of the received source file, and obtaining a video file and an audio file; taking GOP as a unit to segment the video file, and obtaining segmented video files; calculating the time duration when a plurality of transcoding computers process the segmented video files; calculating the segmented video files according to the calculated time duration of each transcoding computer; and transmitting the segmented video files to the corresponding transcoding computers according to the calculation results. The methods provided by the invention enable each transcoding computer to complete transcoding as simultaneously as possible, save transcoding time, and improves the distributed transcoding efficiency.
Description
Technical field
The application relates to Video processing, more specifically, relates to a kind of video file cutting method for distributed trans-coding and distributed trans-coding method.
Background technology
In recent years, along with the development of high-definition audio and video, the kind of video format gets more and more.Due to the limitation that audio and video player is supported video format, need to use video format conversion software to carry out transcoding to the video file of different-format, can smooth and easy operation on a player.Video format conversion principle is decoded to video by video format coding criterion, then according to object format coding criterion recompile.Obtain better image quality to reduce data volume, more advanced coding techniques is used simultaneously, such as H.264 coding techniques.But the coding techniques of similar this advanced person needs to consume more operational capability, according to current high-end processors computing capability, separate unit processor can not the advanced compressed encoding of complete independently one road HD video.Usually, people can adopt the mode of hardware-compressed to solve the problem, and meet the requirement of real-time coding.But hardware encoding obviously not as soft coded system, can not meet in the application to the demand of efficient super real-time transcoding in the flexibility of application.Distributed coding technology is arisen at the historic moment, and it utilizes, and multiple processor is collaborative carries out data processing, achieves real-time coding ability flexibly, also for different application, can carry out efficient super real-time video code conversion.
Video file is carried out cutting by the first step exactly that implement distributed trans-coding, carries out collaborative transcoding in order to pass in other multiple processors.But if video file cutting obtains bad, the data volume distributing to each processor is different, transcoding is complete will to cause some processors, and other processor process must not complete the situation of transcoding more slowly and also, so make the overall end time of transcoding elongate, affect transcoding efficiency.
In view of this, the invention provides a kind of video file cutting method and distributed trans-coding method, to solve the problem.
Summary of the invention
The video file cutting method for distributed trans-coding of the application comprises: receive source file; Demultiplexing is carried out to the described source file received and obtains video file and audio file; In units of GOP, segmentation is carried out to described video file and obtain segmentation rear video file; Calculate the duration of the described segmentation rear video file that multiple stage transcoding computer processes respectively; According to the described duration of the described segmentation rear video file of the every platform transcoding computer disposal calculated, described segmentation rear video file is calculated; And according to described result of calculation, the video file after described segmentation is sent to corresponding transcoding computer.
Preferably, H.264 the form of described video file is.
Preferably, described multiple stage transcoding computer is N platform transcoding computer, n-th transcoding computer has the processor of CNn free time, the dominant frequency that each processor is corresponding is Fn, the duration of described video file is T, the described duration of the described segmentation rear video file of n-th transcoding computer disposal is Tn, wherein
1≤n≤N, N is positive integer, and CNn is positive integer.
Preferably, according to Tn, described segmentation rear video file in units of GOP is combined.
Preferably, in units of GOP, split to described video file the step obtaining described segmentation rear video file to comprise: split in units of GOP from the frame head of GOP.
The distributed trans-coding method of the application comprises: receive source file; Demultiplexing is carried out to the described source file received and obtains video file and audio file; In units of GOP, segmentation is carried out to described video file and obtain segmentation rear video file; Calculate the duration of the described segmentation rear video file that multiple stage transcoding computer processes respectively; According to the described duration of the described segmentation rear video file of the every platform transcoding computer disposal calculated, described segmentation rear video file is calculated; According to described result of calculation, the video file after described segmentation is sent to corresponding transcoding computer; Transcoding is carried out to described audio file and obtains the audio file after transcoding; The video file after transcoding is received from described multiple stage transcoding computer; And the video file after the audio file after described transcoding and described transcoding is carried out multiplexing, obtain output file.
Preferably, H.264 the form of described video file is.
Preferably, described multiple stage transcoding computer is N platform transcoding computer, n-th transcoding computer has the processor of CNn free time, the dominant frequency that each processor is corresponding is Fn, the duration of described video file is T, the described duration of the described segmentation rear video file of n-th transcoding computer disposal is Tn, wherein
1≤n≤N, N is positive integer, and CNn is positive integer.
Preferably, in units of GOP, split to described video file the step obtaining described segmentation rear video file to comprise: split in units of GOP from the frame head of GOP.
Preferably, this locality described audio file carried out transcoding obtain described transcoding after audio file.
The video file cutting method for distributed trans-coding that the present invention proposes and distributed trans-coding method, have the following advantages:
1) distribute the segmentation rear video file of its correspondence to every platform transcoding computer, every platform transcoding computer can be made as far as possible simultaneously to complete transcoding operation.
2) save the transcoding time, thus improve the transcoding efficiency of distributed trans-coding.
Certainly, the either method implementing the application must not necessarily need to reach above-described all technique effects simultaneously.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide further understanding of the present application, and form a application's part, the schematic description and description of the application, for explaining the application, does not form the improper restriction to the application.In the accompanying drawings:
Fig. 1 is the schematic flow sheet of the video file cutting method for distributed trans-coding of the application one embodiment;
Fig. 2 is the schematic flow sheet of the distributed trans-coding method of the application one embodiment.
Embodiment
As employed some vocabulary to censure specific components in the middle of specification and claim.Those skilled in the art should understand, and hardware manufacturer may call same assembly with different noun.This specification and claims are not used as with the difference of title the mode distinguishing assembly, but are used as the criterion of differentiation with assembly difference functionally." comprising " as mentioned in the middle of specification and claim is in the whole text an open language, therefore should be construed to " comprise but be not limited to "." roughly " refer to that in receivable error range, those skilled in the art can solve the technical problem within the scope of certain error, reach described technique effect substantially.Specification subsequent descriptions is implement the better embodiment of the application, and right described description is for the purpose of the rule that the application is described, and is not used to the scope limiting the application.The protection range of the application is when being as the criterion depending on the claims person of defining.
Fig. 1 is the schematic flow sheet of the video file cutting method for distributed trans-coding of the application one embodiment.As shown in Figure 1, comprise the following steps:
Step 101, receives source file.
In one embodiment of this invention, source file is comprise the video of H.264 form and the audio frequency of specific coding form.It is noted that the coded format of the present invention's not restricting audio, such as, in one embodiment of this invention, audio coding formats can be AAC-LC coded format.
Step 102, carries out demultiplexing to the source file received.
In one embodiment of this invention, demultiplexing is carried out to the source file received, obtain video file and audio file.Such as, when source file is the audio frequency comprising the video of H.264 form and AAC-LC coded format, what step 102 obtained is the video file of H.264 form and the audio file of AAC-LC coded format.
Step 103, carries out segmentation to video file and obtains segmentation rear video file in units of GOP.
In one embodiment of this invention, the video file of the H.264 form obtained of decoding is split, to be sent to multiple transcoding computer carrying out transcoding process.Particularly, with picture group (GroupofPictures, GOP) for unit is split video file.A GOP comprises one group of continuous print picture, containing I frame, P frame or B frame.When splitting the video file of H.264 form, segmentation need from the frame head of GOP, otherwise, will former frame be there will be can not carry out the situation of H.265 transcoding.For H.264 form, can frame head be searched, if frame type is shown as every IDR frame, be indicated as the frame head of GOP, from then on start to carry out splitting in units of GOP.
Step 104, calculates the duration of the segmentation rear video file that multiple stage transcoding computer processes respectively.
After video file is split in units of GOP, segmentation rear video file is sent to multiple transcoding computer and carries out distribution transcoding.Calculate function to make multiple transcoding and synchronously complete transcoding, the configuration according to transcoding computer is determined by the duration of its video file be assigned with.In one embodiment of this invention, the duration of treatable segmentation rear video file is calculated according to the configuring condition of the processor of the idle transcoding computer in local area network (LAN).
Such as, if there is the idle transcoding computer of N platform in local area network (LAN), n-th transcoding computer has the processor of CNn free time, the dominant frequency that each processor is corresponding is Fn, the decode duration of the video file obtained of step 102 is T, the duration of n-th transcoding computer treatable segmentation rear video file is Tn, wherein
1≤n≤N, N is positive integer, and CNn is positive integer.
As mentioned above, the duration that every platform transcoding computer can carry out the video file of transcoding process can calculate.
Step 105, according to the duration of the every platform transcoding computer treatable segmentation rear video file calculated, calculates the segmentation rear video file after segmentation in units of GOP.
In one embodiment of this invention, in units of GOP, segmentation is carried out to video file and obtain segmentation rear video file, such as, the video file of the duration H.264 form of 45 minutes, after splitting in units of GOP, become the segmentation rear video file with M GOP unit time.Now, calculate the duration of every platform transcoding computer treatable segmentation rear video file, according to this duration, the segmentation rear video file with M GOP unit time is calculated, be combined into and respectively there is M1, M2 ... video file after N number of segmentation of MN GOP unit time, wherein N is the quantity of transcoding computer.
Step 106, is sent to corresponding transcoding computer according to result of calculation by the video file after segmentation.
So, distribute the segmentation rear video file of its correspondence to every platform transcoding computer, every platform transcoding computer can be made simultaneously to complete transcoding operation.
Fig. 2 is the schematic flow sheet of the distributed trans-coding method of the application one embodiment.As shown in Figure 2, comprise the following steps:
Step 201, receives source file.
In one embodiment of this invention, source file is comprise the video of H.264 form and the audio frequency of specific coding form.It is noted that the coded format of the present invention's not restricting audio, such as, in one embodiment of this invention, audio coding formats can be AAC-LC coded format.
Step 202, carries out demultiplexing to the source file received.
In one embodiment of this invention, demultiplexing is carried out to the source file received, obtain video file and audio file.Such as, when source file is the audio frequency comprising the video of H.264 form and AAC-LC coded format, what step 102 obtained is the video file of H.264 form and the audio file of AAC-LC coded format.
Step 203, carries out segmentation to video file and obtains segmentation rear video file in units of GOP.
In one embodiment of this invention, the video file of the H.264 form obtained of decoding is split, to be sent to multiple transcoding computer carrying out transcoding process.Particularly, with picture group (GroupofPictures, GOP) for unit is split video file.A GOP comprises one group of continuous print picture, containing I frame, P frame or B frame.When splitting the video file of H.264 form, segmentation need from the frame head of GOP, otherwise, will former frame be there will be can not carry out the situation of H.265 transcoding.For H.264 form, can frame head be searched, if frame type is shown as every IDR frame, be indicated as the frame head of GOP, from then on start to carry out splitting in units of GOP.
Step 204, calculates the duration of multiple stage transcoding computer treatable segmentation rear video file.
After video file is split in units of GOP, segmentation rear video file is sent to multiple transcoding computer and carries out distribution transcoding.Calculate function to make multiple transcoding and synchronously complete transcoding, the configuration according to transcoding computer is determined by the duration of its video file be assigned with.In one embodiment of this invention, the duration of treatable segmentation rear video file is calculated according to the configuring condition of the processor of the idle transcoding computer in local area network (LAN).
Such as, if there is the idle transcoding computer of N platform in local area network (LAN), n-th transcoding computer has the processor of CNn free time, the dominant frequency that each processor is corresponding is Fn, the decode duration of the video file obtained of step 102 is T, the duration of n-th transcoding computer treatable segmentation rear video file is Tn, wherein
1≤n≤N, N is positive integer.
As mentioned above, the duration that every platform transcoding computer can carry out the video file of transcoding process can calculate.
Step 205, according to the duration of the every platform transcoding computer treatable segmentation rear video file calculated, calculates the video file after segmentation in units of GOP.
In one embodiment of this invention, in units of GOP, segmentation is carried out to video file and obtain segmentation rear video file, such as, the video file of the duration H.264 form of 45 minutes, after splitting in units of GOP, become the segmentation rear video file with M GOP unit time.Now, calculate the duration of every platform transcoding computer treatable segmentation rear video file, according to this duration, the segmentation rear video file with M GOP unit time is calculated, be combined into and respectively there is M1, M2 ... video file after N number of segmentation of MN GOP unit time, wherein N is the quantity of transcoding computer.
Step 206, is sent to corresponding transcoding computer according to result of calculation by the video file after segmentation.
Step 207, carries out transcoding to audio file and obtains the audio file after transcoding.
In one embodiment of this invention, this locality audio file carried out transcoding obtain transcoding after audio file.
Step 208, receives the video file after transcoding from multiple stage transcoding computer.
In one embodiment of this invention, the process that transcoding computer carries out transcoding be to the segmentation received after video file H.264 decode, obtain yuv data, finally carry out x65 coding obtain the transcoding of H.265 form after video file.
Step 209, is undertaken multiplexing by the audio file after transcoding and the video file after transcoding, obtains output file.
Please note that the operating sequence of the present invention's not conditioning step 207, according to design requirement, can be carried out before or after step 203,204,205,206,208 wherein any step.
As above, distribute the segmentation rear video file of its correspondence to every platform transcoding computer, every platform computer can be made simultaneously to complete transcoding operation, therefore can receive transcoding rear video file simultaneously, so save the transcoding time, thus improve the transcoding efficiency of distributed trans-coding.
Therefore compared to conventional method, the present invention has the following advantages:
1) distribute the segmentation rear video file of its correspondence to every platform transcoding computer, every platform transcoding computer can be made as far as possible simultaneously to complete transcoding operation.
2) save the transcoding time, thus 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, and the processor of transit code computer of the present invention can be CPU, general processor, digital signal processor etc.
It should be noted that, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thus make to comprise the process of a series of key element, method, commodity or system and not only comprise those key elements, but also comprise other key elements clearly do not listed, or also comprise by the intrinsic key element of this process, method, commodity or system.When not more restrictions, the key element limited by statement " comprising ... ", and be not precluded within process, method, commodity or the system comprising described key element and also there is other identical element.
The foregoing is only the embodiment of the application, be not limited to the application.To those skilled in the art, the application can have various modifications and variations.Any amendment done within all spirit in the application and principle, equivalent replacement, improvement etc., within the right that all should be included in the application.
Claims (10)
1., for a video file cutting method for distributed trans-coding, it is characterized in that, comprising:
Receive source file;
Demultiplexing is carried out to the described source file received and obtains video file and audio file;
In units of GOP, segmentation is carried out to described video file and obtain segmentation rear video file;
Calculate the average duration of the described segmentation rear video file that multiple stage transcoding computer processes respectively;
According to the described duration of the described segmentation rear video file of the every platform transcoding computer disposal calculated, described segmentation rear video file is calculated; And
According to described result of calculation, the video file after described segmentation is sent to corresponding transcoding computer.
2. video file cutting method as claimed in claim 1, it is characterized in that, H.264 the form of described video file is.
3. video file cutting method as claimed in claim 1, it is characterized in that, described multiple stage transcoding computer is N platform transcoding computer, n-th transcoding computer has the processor of CNn free time, the dominant frequency that each processor is corresponding is Fn, the duration of described video file is T, and the described duration of the described segmentation rear video file of n-th transcoding computer disposal is Tn, wherein
1≤n≤N, N is positive integer, and CNn is positive integer.
4. video file cutting method as claimed in claim 3, is characterized in that, is combined by described segmentation rear video file in units of GOP according to Tn.
5. video file cutting method as claimed in claim 1, is characterized in that, split the step obtaining described segmentation rear video file and comprise: split in units of GOP from the frame head of GOP in units of GOP to described video file.
6. a distributed trans-coding method, is characterized in that, comprising:
Receive source file;
Demultiplexing is carried out to the described source file received and obtains video file and audio file;
In units of GOP, segmentation is carried out to described video file and obtain segmentation rear video file;
Calculate the duration of the described segmentation rear video file that multiple stage transcoding computer processes respectively;
According to the described duration of the described segmentation rear video file of the every platform transcoding computer disposal calculated, described segmentation rear video file is calculated;
According to described result of calculation, the video file after described segmentation is sent to corresponding transcoding computer;
Transcoding is carried out to described audio file and obtains the audio file after transcoding;
The video file after transcoding is received from described multiple stage transcoding computer; And
Video file after audio file after described transcoding and described transcoding is carried out multiplexing, obtains output file.
7. distributed trans-coding method as claimed in claim 6, it is characterized in that, H.264 the form of described video file is.
8. distributed trans-coding method as claimed in claim 6, it is characterized in that, described multiple stage transcoding computer is N platform transcoding computer, n-th transcoding computer has the processor of CNn free time, the dominant frequency that each processor is corresponding is Fn, the duration of described video file is T, and the described duration of the described segmentation rear video file of n-th transcoding computer disposal is Tn, wherein
1≤n≤N, N is positive integer, and CNn is positive integer.
9. distributed trans-coding method as claimed in claim 6, is characterized in that, split the step obtaining described segmentation rear video file and comprise: split in units of GOP from the frame head of GOP in units of GOP to described video file.
10. distributed trans-coding method as claimed in claim 6, is characterized in that, this locality described audio file carried out transcoding obtain described transcoding after audio file.
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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 |
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| CN115174578A (en) * | 2022-07-25 | 2022-10-11 | 上海网达软件股份有限公司 | Kubernetes-based on-demand parallel transcoding method and device and storage medium |
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