CN105959687A - Video coding method and device - Google Patents
Video coding method and device Download PDFInfo
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- CN105959687A CN105959687A CN201610461704.8A CN201610461704A CN105959687A CN 105959687 A CN105959687 A CN 105959687A CN 201610461704 A CN201610461704 A CN 201610461704A CN 105959687 A CN105959687 A CN 105959687A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
- H04N19/169—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding
- H04N19/17—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the coding unit, i.e. the structural portion or semantic portion of the video signal being the object or the subject of the adaptive coding the unit being an image region, e.g. an object
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/20—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using video object coding
- H04N19/23—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using video object coding with coding of regions that are present throughout a whole video segment, e.g. sprites, background or mosaic
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/42—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals characterised by implementation details or hardware specially adapted for video compression or decompression, e.g. dedicated software implementation
- H04N19/436—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals characterised by implementation details or hardware specially adapted for video compression or decompression, e.g. dedicated software implementation using parallelised computational arrangements
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Computing Systems (AREA)
- Theoretical Computer Science (AREA)
- Compression Or Coding Systems Of Tv Signals (AREA)
Abstract
The invention discloses a video coding method and device. The method comprises the following steps: all sequence frame image files of a video to be coded are divided into a plurality of sections of sequence frame image files; each section of the sequence frame image files is assigned to a computing node in a cluster, and the computing nodes carry out parallel video coding of the sections of the sequence frame image files so as to form a plurality of sections of video files; the sections of the video files form a complete video file through synthesis. The video coding method and device adopting the technical scheme have the advantages that the video coding efficiency and accuracy are improved.
Description
Technical field
The present invention relates to technical field of video coding, particularly to a kind of method for video coding and device.
Background technology
Frame is unit minimum in animation, and sequence frame refers to the two field picture file of one group of order, is used for representing one section of continuous print
Video.By sequence frame image is carried out Video coding, the video file for playing can be formed.After film
In phase manufacturing process, the storage mode of sequence frame file can be used, it is simple to carry out editor's reprocessing.After completing,
Again sequence frame coding is become video, be used for playing.
At present, the sequence frame coded method of main flow, it is to use the later stage to process software, all sequences frame is loaded into, completes
After the arranging of coded format etc., order performs, and is finally completed the coding work of whole video.
As a example by a conventional film, the most a length of 90 minutes, 24 frames per second, then there is the sequence of about 130,000
Row two field picture.If directly carrying out Video coding, owing to sequence frame is more, on the one hand, use unit to perform, can be with
The increase of group/cording quantity, coding rate declines, and operational efficiency is relatively low；On the other hand, may be in an encoding process
Mistake occur, once failure, needs to re-execute whole cataloged procedure.
Therefore, existing method for video coding, code efficiency and accuracy rate are low.
Summary of the invention
Embodiments provide a kind of method for video coding, in order to improve efficiency and the accuracy rate of Video coding, should
Method includes:
The all sequences two field picture file of video to be encoded is divided into multistage sequence frame image file；
Every section of sequence frame image file is distributed to the calculating node in a cluster, calculates node to multistage sequence frame
Image file carries out parallel video coding, forms multistage video file；
Described multistage video file is synthesized complete video file.
Embodiments provide a kind of video coding apparatus, in order to improve efficiency and the accuracy rate of Video coding.Should
Device includes:
Segmenting unit, for being divided into multistage sequence frame image file by all sequences two field picture file of video to be encoded；
Coding unit, for every section of sequence frame image file is distributed to the calculating node in a cluster, calculates node
Multistage sequence frame image file is carried out parallel video coding, forms multistage video file；
Synthesis unit, for synthesizing complete video file by described multistage video file.
Compared with prior art, the technical scheme that the present invention provides, by by all sequences frame figure of video to be encoded
As file is divided into multistage sequence frame image file, every section of sequence frame image file is distributed to the calculating joint in a cluster
Point, calculates node and multistage sequence frame image file carries out parallel video coding, form multistage video file, by described
Multistage video file synthesizes complete video file, is calculated by segment encoding, utilizes Distributed Parallel Computing technology,
Being rapidly completed the process of Video coding: in the case of encoding unsuccessfully, user has only to check the problem under this segmentation,
And re-execute this segmentation subtask and can complete, it is not necessary to again whole sequence frame file is recompiled, only need
The sequence frame image file of this section is recompiled, relative to the disposable all sequences frame to video file
For image file disposably encodes, the present invention passes through segment encoding, improves the efficiency of coding, the most also
Improve the accuracy rate of Video coding.
Accompanying drawing explanation
Accompanying drawing described herein is used for providing a further understanding of the present invention, constitutes the part of the application, not
Constitute limitation of the invention.In the accompanying drawings:
Fig. 1 is the schematic flow sheet of method for video coding in the embodiment of the present invention；
Fig. 2 is the schematic flow sheet of method for video coding in another embodiment of the present invention；
Fig. 3 is the structural representation of video coding apparatus in the embodiment of the present invention.
Detailed description of the invention
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with embodiment and accompanying drawing,
The present invention is described in further details.Here, the exemplary embodiment of the present invention and explanation thereof are used for explaining this
Bright, but not as a limitation of the invention.
Fig. 1 is the schematic flow sheet of method for video coding in the embodiment of the present invention, as it is shown in figure 1, the method include as
Lower step:
Step 101: all sequences two field picture file of video to be encoded is divided into multistage sequence frame image file；
Step 102: every section of sequence frame image file is distributed to the calculating node in a cluster, calculates joint point-to-points
Section sequence frame image file carries out parallel video coding, forms multistage video file；
Step 103: multistage video file is synthesized complete video file.
Compared with prior art, the technical scheme that the present invention provides, by by all sequences frame of video to be encoded
Image file is divided into multistage sequence frame image file, and every section of sequence frame image file is distributed to the meter in a cluster
Operator node, calculates node and multistage sequence frame image file carries out parallel video coding, form multistage video file,
Described multistage video file is synthesized complete video file, is calculated by segment encoding, be rapidly completed video and compile
The process of code: in the case of encoding unsuccessfully, user has only to check the problem under this segmentation, and re-executes this
Segmentation subtask can complete, it is not necessary to again recompiles whole sequence frame file, only need to be to the sequence of this section
Row two field picture file carries out recompiling, relative to the disposable all sequences two field picture file to video file
For disposably encoding, the present invention passes through segment encoding, improves the efficiency of coding, also improves simultaneously
The accuracy rate of Video coding.
When being embodied as, the invention provides a kind of distributed video coding method towards sequence frame image, will wait to compile
After all sequences two field picture file of code film is divided into multistage sequence frame image file, specifically can be by every section of sequence frame
Image file distributes to the calculating node in a cluster, and every section of sequence frame image file is carried out by each calculating node
Video coding, forms multistage video file, finally, described multistage video file is synthesized complete video file.
So process of the sequence frame of each segmentation, video, all by the distribution of distributed type assemblies, only by a logic
Vertical calculating node has performed, and by a large-scale cluster, can quick, parallel execution complete to own
Task, the present invention saves the scramble time from sequence frame to video, utilizes cluster distributed calculating, promotes coding effect
Rate, meanwhile, improves the accuracy rate of coding.
In one embodiment, above-mentioned steps 101 be may include that
When total sequence frame number of video to be encoded is less than 1000 with the ratio of pre-staged hop count, by all sequences frame
Image file is divided into pre-staged hop count；
When total sequence frame number of video to be encoded is more than or equal to 1000 with the ratio of pre-staged hop count, will be all
Sequence frame image file is divided into 1000 sections.
When being embodied as, as in figure 2 it is shown, for the film to be encoded of sequence frame substantial amounts, can be so that cluster to calculate
Quantity N of node is foundation, and all sequences frame is carried out segmentation, shares the workload of each node.According to invention
A large amount of tests of people, the efficiency calculating nodes encoding 1000 frame is higher.So, it is assumed that film to be encoded total
Sequence frame number is M (note: lack frame condition owing to there may be sequence frame, therefore M=last frame frame number the-the first frame frame
Number+1) time, take M/N and 1000 and make comparisons, if M/N is less than 1000 frames, then all frames are divided into N section,
Every section processes M/N frame；Otherwise, each node processing 1000 frame, all frames are divided into M/1000 section.All sections
Should be numbered in order, and recorded in daily record.
In one embodiment, above-mentioned steps 102 may include that
The type of Video coding, code stream size and video playout speed are set；
According to the type of Video coding, every section of sequence frame image file is carried out Video coding, form video file；
According to this section of video file due sequence frame number, code stream size and video playout speed, to this section of video file
Integrity degree test；Inspection to integrity degree, specifically can be by calculating the duration of this section of video file with anticipated
Duration is the most equal to be judged.
When the integrity degree that assay is this section of video file is defective, i.e. the duration of this section of video file and pre-timing
When length is unequal, this section of video file is recompiled.
When being embodied as, as in figure 2 it is shown, before encoding the sequence frame being verified, user can be according to defeated
Go out needs, select to arrange the type of coding, code stream size, broadcasting speed (frame number of broadcasting per second) etc..Coding work
Make to carry out respectively by the section divided before.After each section of coding, for a bit of video, should according to this section
Some sequence frame numbers, and the broadcasting speed of video, check that whether the duration of every section of video is equal to anticipated duration (frame automatically
Number/broadcasting speed).If unequal, then show to there is a problem in an encoding process, this segment number be recorded daily record
In and labelling correspondence section subtask failure, re-execute after the video that user checks this section.If every section of video time
Long being equal to estimates duration, then it is assumed that all subtasks are all successful, and automatically run to next step.
In one embodiment, above-mentioned steps 103 can include multiple cycle, is performed both by following behaviour for each cycle
Make:
Multistage video file is divided into multiple groups；
The integrity degree often organizing video file is checked, specifically can be by calculating the duration of this section of video file with pre-
Timing length is the most equal to be judged；
When the integrity degree often organizing video file is qualified, when can be i.e. that often group video file duration is equal to anticipated duration,
This group video file is synthesized one section of video file, until all video files are synthesized one section of complete video file.
When being embodied as, as in figure 2 it is shown, on the basis of the most some segment videos, it is intended to be merged into complete
Video file, for improving speed and efficiency, the thinking of layering to be used is carried out.First have to before merging be confirmed whether institute
The section of having all is complete coding, and is committed to storage dish battle array.Confirm all sections all have been filed on after, now need to introduce one
Packet combining number S, is merged into one section of video (according to previous experiences, S desirable 10) every S section video, thus obtains
To the video-frequency band that several are a little longer.After merging, whether the video duration after inspection merges is equal to anticipated duration, as
The most equal, then can proceed to merge, slightly long video-frequency band is merged into longer video-frequency band, until by all of
Video-frequency band merges into one section, then complete task, can terminate.If finding the duration after merging and anticipated duration,
Then log and stop merge, after user checks, re-execute failed tasks.
In one embodiment, as in figure 2 it is shown, multistage sequence frame image file is carried out parallel video calculating node
Coding, forms multistage video file, the most also includes: test every section of sequence frame image file.I.e. above-mentioned
The step that every section of sequence frame image file is tested can also be included between step 101 and step 102, so may be used
To ensure the accuracy of Video coding.
In one embodiment, every section of sequence frame image file is tested, may include that
To the sequence frame image file of bad frame occurs, repair；
To there is lacking the sequence frame image file of frame, test and recompile.
When being embodied as, as in figure 2 it is shown, lack the situation such as frame, bad frame owing to there may be sequence frame, so first having to
The sequence frame of every section is tested.Bit depth is not inconsistent or the detectable bad frame such as Alpha access issues is asked
Topic, can be repaired picture automatically by application program；Problem discontinuous to scarce frame, i.e. frame number, then by institute
Scarce frame number recorded journal file this cross-talk mission failure of labelling, waits that user holds after processing respective frame again
Row failed tasks.If all sections are not all detected frame of falling vacant, bad frame problem, or the complete problem of manual handle, the most automatically transport
Walk to next step.
Based on same inventive concept, the embodiment of the present invention additionally provides a kind of video coding apparatus, such as following enforcement
Example.Owing to the principle of video coding apparatus solution problem is similar to method for video coding, the therefore reality of video coding apparatus
Execute the enforcement that may refer to method for video coding, repeat no more in place of repetition.Used below, term " unit "
Or " module " can realize the software of predetermined function and/or the combination of hardware.Although the dress described by following example
Put and preferably realize with software, but hardware, or the realization of the combination of software and hardware is also possible and to be contemplated
's.
Fig. 3 is the structural representation of video coding apparatus in the embodiment of the present invention, as it is shown on figure 3, this device includes:
Segmenting unit 10, for being divided into multistage sequence frame image literary composition by all sequences two field picture file of video to be encoded
Part；
Coding unit 20, for every section of sequence frame image file is distributed to the calculating node in a cluster, calculates
Node carries out parallel video coding to multistage sequence frame image file, forms multistage video file；
Synthesis unit 30, for synthesizing complete video file by multistage video file.
In one embodiment, segmenting unit 10 specifically may be used for:
When total sequence frame number of video to be encoded is less than 1000 with the ratio of pre-staged hop count, by all sequences frame
Image file is divided into pre-staged hop count；
When total sequence frame number of video to be encoded is more than or equal to 1000 with the ratio of pre-staged hop count, will be all
Sequence frame image file is divided into 1000 sections.
In one embodiment, coding unit 20 specifically may be used for:
The type of Video coding, code stream size and video playout speed are set；
According to the type of Video coding, every section of sequence frame image file is carried out Video coding, form video file；
According to this section of video file due sequence frame number, code stream size and video playout speed, to this section of video file
Integrity degree test；
When the integrity degree that assay is this section of video file is defective, this section of video file is recompiled.
In one embodiment, synthesis unit 30 specifically may be used for utilizing multiple cycle to synthesize, for each
Cycle all can perform following operation:
Multistage video file is divided into multiple groups；
The integrity degree often organizing video file is checked；
When the integrity degree often organizing video file is qualified, this group video file is synthesized one section of video file, until by institute
Video file is had to synthesize one section of complete video file.
In one embodiment, in the embodiment of the present invention, video coding apparatus can also include: sequence frame verification unit,
For every section of sequence frame image file is tested.
In one embodiment, sequence frame verification unit specifically may be used for calculating node to multistage sequence frame image literary composition
Part carries out parallel video coding, forms multistage video file, before:
To the sequence frame image file of bad frame occurs, repair；
To there is lacking the sequence frame image file of frame, test and recompile.
When being embodied as, can complete the inspection of sequence frame picture by open source software, video length is checked, video is compiled
Code, Video Composition etc. operate；The task such as Video coding, Video Composition is completed by FFmpeg；Pass through FFprobe
Inspection video length；Checked and repairing sequence two field picture by ImageMagick.
The technical scheme that the embodiment of the present invention provides can reach following Advantageous Effects:
The present invention can avoid the uncertainty of sequence frame, avoids the failed phenomenon being frequently encountered by coding, logical
Cross Distributed Calculation, be rapidly completed the process of Video coding.If there is failed tasks, user has only to check this point
Problem under Duan, and re-execute this segmentation subtask and can complete, it is to avoid owing to coding is made mistakes again holding of causing
The scene of row.
Obviously, those skilled in the art should be understood that each module of the above-mentioned embodiment of the present invention, device or respectively walks
Suddenly can realize with general calculating device, they can concentrate on single calculating device, or is distributed in many
On the network that individual calculating device is formed, alternatively, they can realize with calculating the executable program code of device,
Perform it is thus possible to be stored in storing in device by calculating device, and in some cases, can be with
It is different from the step shown or described by order execution herein, or they are fabricated to respectively each integrated circuit die
Block, or the multiple modules in them or step are fabricated to single integrated circuit module realize.So, the present invention
Embodiment is not restricted to any specific hardware and software and combines.
These are only the preferred embodiments of the present invention, be not limited to the present invention, for those skilled in the art
For Yuan, the embodiment of the present invention can have various modifications and variations.All within the spirit and principles in the present invention, made
Any modification, equivalent substitution and improvement etc., should be included within the scope of the present invention.
Claims (10)
1. a method for video coding, it is characterised in that including:
The all sequences two field picture file of video to be encoded is divided into multistage sequence frame image file；
Every section of sequence frame image file is distributed to the calculating node in a cluster, calculates node to multistage sequence frame
Image file carries out parallel video coding, forms multistage video file；
Described multistage video file is synthesized complete video file.
2. method for video coding as claimed in claim 1, it is characterised in that by all sequences of video to be encoded
Two field picture file is divided into multistage sequence frame image file, including:
When total sequence frame number of video to be encoded is less than 1000 with the ratio of pre-staged hop count, by all sequences frame
Image file is divided into described pre-staged hop count；
When total sequence frame number of video to be encoded is more than or equal to 1000 with the ratio of pre-staged hop count, will be all
Sequence frame image file is divided into 1000 sections.
3. method for video coding as claimed in claim 1, it is characterised in that calculate node to multistage sequence frame figure
As file carries out in parallel video coding, each calculating node carries out Video coding bag to one section of sequence frame image file
Include:
The type of Video coding, code stream size and video playout speed are set；
According to the type of Video coding, every section of sequence frame image file is carried out Video coding, form video file；
According to this section of video file due sequence frame number, code stream size and video playout speed, to this section of video file
Integrity degree test；
When the integrity degree that assay is this section of video file is defective, this section of video file is recompiled.
4. method for video coding as claimed in claim 1, it is characterised in that described multistage video file is synthesized
For complete video file, including multiple cycles, following operation is performed both by for each cycle:
Multistage video file is divided into multiple groups；
The integrity degree often organizing video file is checked；
When the integrity degree often organizing video file is qualified, this group video file is synthesized one section of video file, until by institute
Video file is had to synthesize one section of complete video file.
5. method for video coding as claimed in claim 1, it is characterised in that calculating node to multistage sequence frame
Image file carries out parallel video coding, forms multistage video file, the most also includes:
To the sequence frame image file of bad frame occurs, repair；
To there is lacking the sequence frame image file of frame, test and recompile.
6. a video coding apparatus, it is characterised in that including:
Segmenting unit, for being divided into multistage sequence frame image file by all sequences two field picture file of video to be encoded；
Coding unit, for every section of sequence frame image file is distributed to the calculating node in a cluster, calculates node
Multistage sequence frame image file is carried out parallel video coding, forms multistage video file；
Synthesis unit, for synthesizing complete video file by described multistage video file.
7. video coding apparatus as claimed in claim 6, it is characterised in that described segmenting unit specifically for:
When total sequence frame number of video to be encoded is less than 1000 with the ratio of pre-staged hop count, by all sequences frame
Image file is divided into described pre-staged hop count；
When total sequence frame number of video to be encoded is more than or equal to 1000 with the ratio of pre-staged hop count, will be all
Sequence frame image file is divided into 1000 sections.
8. video coding apparatus as claimed in claim 6, it is characterised in that described coding unit specifically for:
The type of Video coding, code stream size and video playout speed are set；
According to the type of Video coding, every section of sequence frame image file is carried out Video coding, form video file；
According to this section of video file due sequence frame number, code stream size and video playout speed, to this section of video file
Integrity degree test；
When the integrity degree that assay is this section of video file is defective, this section of video file is recompiled.
9. video coding apparatus as claimed in claim 6, it is characterised in that described synthesis unit is specifically for profit
Synthesize with multiple cycles, following operation be performed both by for each cycle:
Multistage video file is divided into multiple groups；
The integrity degree often organizing video file is checked；
When the integrity degree often organizing video file is qualified, this group video file is synthesized one section of video file, until by institute
Video file is had to synthesize one section of complete video file.
10. video coding apparatus as claimed in claim 6, it is characterised in that also include: sequence frame verification unit,
For multistage sequence frame image file being carried out parallel video coding at calculating node, form multistage video file, before:
To the sequence frame image file of bad frame occurs, repair；
To there is lacking the sequence frame image file of frame, test and recompile.
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| CN201610461704.8A CN105959687A (en) | 2016-06-23 | 2016-06-23 | Video coding method and device |
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| CN201610461704.8A CN105959687A (en) | 2016-06-23 | 2016-06-23 | Video coding method and device |
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Application publication date: 20160921 |