CN105049856A - Method and device for processing video file - Google Patents
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Abstract
The invention discloses a method and a device for processing a video file. The method and the device of the invention are used for converting a video with a dynamic frame rate into a video with a fixed frame rate. The method comprises the steps as follows: cutting a decoded video file into a plurality of GOP files of unit time length, wherein each GOP file contains a plurality of video frames; processing the video frames in each GOP file of unit time length according to a preset video frame rate to obtain the GOP files with the preset video frame rate; and coding the processed GOP files. According to the technical solution, the method and the device of the invention enable the video frames in the processed GOP files to have the preset video frame rate by processing the video frames in the GOP files of unit time length so as to achieve the goal of converting the video with the dynamic frame rate into the video with the fixed frame rate.
Description
Technical field
The present invention relates to Internet technical field, particularly a kind of processing method of video file and device.
Background technology
Video coding, refers to by specific compress technique, the file transform of certain video format is become the mode of another kind of video format file.After video signal digitization, data bandwidth is very high, and usually more than 20MB/ second, therefore computer is difficult to preserve it and process.Adopt the usual data bandwidth of compress technique to drop to 1-10MB/ second, so just vision signal can be preserved in a computer and be correspondingly processed.To in the cataloged procedure of video, video is needed to have fixing frame per second, with the frame per second of 25 frames per second, if want to make the duration of each gop file be one minute, count 1500 frame of video so successively, the effect for cutting according to each minute gop file can be completed, but, due to the frame per second dynamic change often of frame of video, be not unalterable, therefore, cut gop file in this way and can not reach effect accurately, thus affect the relevant treatment of later stage to video.
Summary of the invention
The invention provides a kind of processing method and device of video file, is the video of fixing frame per second by the Video Quality Metric of dynamic frame per second in order to realization.
The invention provides a kind of processing method of video file, comprising:
Decoded video file is cut into the gop file of multiple unit time, described gop file comprises multiple frame of video;
According to the video frame rate preset, the frame of video in the gop file of each unit time is processed, obtain the gop file meeting described default video frame rate;
Gop file after described process is encoded.
Some beneficial effects of the embodiment of the present invention can comprise:
Technique scheme, by processing the frame of video in the gop file of unit time, making the frame of video in the gop file after processing meet default video frame rate, thus achieving the Video Quality Metric of dynamic frame per second the object of the video being fixing frame per second.
In one embodiment, the described gop file decoded video file being cut into multiple unit time, comprising:
Predetermined time standard method PTS is adopted decoded video file to be cut into the gop file of multiple unit time.
In this embodiment, by PTS, video file is cut, make video file can be cut into the gop file of unit time preparatively, and then the Video Quality Metric of dynamic frame per second is the video of fixing frame per second by realization.
In one embodiment, the video frame rate that described basis is preset, processes the frame of video in the gop file of each unit time, obtains the gop file meeting described default video frame rate, comprising:
According to the video frame rate preset, determine the video frame number preset;
Determine the frame number of the gop file of each unit time described;
Judge whether the frame number of described gop file meets described default video frame number;
When the frame number of described gop file does not meet described default video frame number, the frame of video in described gop file is processed, obtain the gop file meeting described default video frame number.
In this embodiment, by judging whether the frame number of gop file meets the video frame number preset, and processes accordingly, thus make the frame of video in the gop file after process meet default video frame rate to the frame of video in gop file.
In one embodiment, when the described frame number when described gop file does not meet described default video frame number, the frame of video in described gop file is processed, obtains the gop file meeting described default video frame number, comprising:
When described default video frame number is larger than the frame number of described gop file, frame process is added to the frame of video in described gop file, obtain the gop file meeting described default video frame number;
When described default video frame number is less than the frame number of described gop file, frame process is subtracted to the frame of video in described gop file, obtain the gop file meeting described default video frame number.
In this embodiment, by the relation between the frame number of gop file and default video frame number, frame added to the frame of video in gop file or subtracts frame process, thus making the frame of video in the gop file after process meet default video frame rate.
In one embodiment, the video frame rate that described basis is preset, processes the frame of video in the gop file of each unit time, obtains the gop file meeting described default video frame rate, comprising:
Determine the frame per second of the gop file of each unit time described;
Judge whether the frame per second of described gop file meets described default video frame rate;
When the frame per second of described gop file does not meet described default video frame rate, the frame of video in described gop file is processed, obtain the gop file meeting described default video frame rate.
In this embodiment, by judging whether the frame per second of gop file meets the video frame rate preset, and processes accordingly, thus make the frame of video in the gop file after process meet default video frame rate to the frame of video in gop file.
The invention provides a kind of processing unit of video file, comprising:
Cutting module, for decoded video file being cut into the gop file of multiple unit time, described gop file comprises multiple frame of video;
Processing module, for according to the video frame rate preset, processes the frame of video in the gop file of each unit time, obtains the gop file meeting described default video frame rate;
Coding module, for encoding to the gop file after described process.
In one embodiment, described cutting module comprises:
Cutting submodule, cuts into the gop file of multiple unit time for adopting predetermined time standard method PTS by decoded video file.
In one embodiment, described processing module comprises:
First determines submodule, for according to the video frame rate preset, determines the video frame number preset;
Second determines submodule, for determining the frame number of the gop file of each unit time described;
First judges submodule, for judging whether the frame number of described gop file meets described default video frame number;
First process submodule, for when the frame number of described gop file does not meet described default video frame number, processes the frame of video in described gop file, obtains the gop file meeting described default video frame number.
In one embodiment, described first process submodule comprises:
Add frame unit, for when described default video frame number is larger than the frame number of described gop file, frame process is added to the frame of video in described gop file, obtain the gop file meeting described default video frame number;
Subtract frame unit, for when described default video frame number is less than the frame number of described gop file, frame process is subtracted to the frame of video in described gop file, obtain the gop file meeting described default video frame number.
In one embodiment, described processing module comprises:
3rd determines submodule, for determining the frame per second of the gop file of each unit time described;
Second judges submodule, for judging whether the frame per second of described gop file meets described default video frame rate;
Second process submodule, for when the frame per second of described gop file does not meet described default video frame rate, processes the frame of video in described gop file, obtains the gop file meeting described default video frame rate.
Some beneficial effects of the embodiment of the present invention can comprise:
Said apparatus, by processing the frame of video in the gop file of unit time, making the frame of video in the gop file after processing meet default video frame rate, thus achieving the Video Quality Metric of dynamic frame per second the object of the video being fixing frame per second.
Other features and advantages of the present invention will be set forth in the following description, and, partly become apparent from specification, or understand by implementing the present invention.Object of the present invention and other advantages realize by structure specifically noted in write specification, claims and accompanying drawing and obtain.
Below by drawings and Examples, technical scheme of the present invention is described in further detail.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and forms a part for specification, together with embodiments of the present invention for explaining the present invention, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the flow chart of the processing method of a kind of video file in the embodiment of the present invention;
Fig. 2 is the flow chart of the processing method of a kind of video file in the embodiment of the present invention;
Fig. 3 is the flow chart of step S25 in the processing method of a kind of video file in the embodiment of the present invention;
Fig. 4 is the flow chart of the processing method of a kind of video file in the embodiment of the present invention;
Fig. 5 is the block diagram of the processing unit of a kind of video file in the embodiment of the present invention;
Fig. 6 is the block diagram of cutting module in the processing unit of a kind of video file in the embodiment of the present invention;
Fig. 7 is the block diagram of processing module in the processing unit of a kind of video file in the embodiment of the present invention;
Fig. 8 is the block diagram of the first process submodule in the processing unit of a kind of video file in the embodiment of the present invention;
Fig. 9 is the block diagram of processing module in the processing unit of a kind of video file in the embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein is only for instruction and explanation of the present invention, is not intended to limit the present invention.
Fig. 1 is the flow chart of the processing method of a kind of video file in the embodiment of the present invention.As shown in Figure 1, the processing method of this video file comprises the following steps S11-S13:
Step S11, cuts into the gop file of multiple unit time by decoded video file, gop file comprises multiple frame of video.
This step may be embodied as: adopt predetermined time standard method PTS decoded video file to be cut into the gop file of multiple unit time.Predetermined Time Standard (PTS, PredeterminedTimeStandards) method is a kind of technology formulating time standard, and it utilizes the time standard formulated for various operation in advance to determine to carry out the time required for various operation.Such as, the unit time in step S11 is set as 1 minute, then decoded video file is cut into the gop file of multiple 1 minute, the gop file of each minute comprises multiple frame of video.
Step S12, according to the video frame rate preset, processes the frame of video in the gop file of each unit time, obtains the gop file meeting the video frame rate preset.
Step S13, encodes to the gop file after process.
Adopt the technical scheme that the embodiment of the present invention provides, by processing the frame of video in the gop file of unit time, make the frame of video in the gop file after processing meet default video frame rate, thus achieve the Video Quality Metric of dynamic frame per second the object of the video being fixing frame per second.
In one embodiment, as shown in Figure 2, said method can also be embodied as following steps S21-S26:
Step S21, cuts into the gop file of multiple unit time by decoded video file, gop file comprises multiple frame of video.
Step S22, according to the video frame rate preset, determines the video frame number preset.
Step S23, determines the frame number of the gop file of each unit time.
Step S24, judges whether the frame number of gop file meets the video frame number preset.
Step S25, when the frame number of gop file does not meet the video frame number preset, processes the frame of video in gop file, obtains the gop file meeting the video frame number preset.
Step S26, encodes to the gop file after process.
In this embodiment, judge whether the frame number of the gop file of each unit time meets the video frame number preset respectively, when the frame number of the gop file of one of them unit time meets the video frame number preset just, then the frame of video of the gop file of this unit time is not processed, continue the frame number judging the gop file of next unit time, finally make the video frame number of the gop file of each unit time cut into meet the video frame number preset, thus realize the Video Quality Metric of dynamic frame per second the object of the video being fixing frame per second.
In above-described embodiment, as shown in Figure 3, step S25 may be embodied as following steps S251-S252:
Step S251, when the video frame number preset is larger than the frame number of gop file, adds frame process to the frame of video in gop file, obtains the gop file meeting the video frame number preset.
Such as, unit time is set as 1 minute, and the video frame number preset is 25 frames, in the multiple gop files cut into, if the video frame number in certain gop file of 1 minute is 20 frames, then needs to add frame process to the frame of video in this gop file of 1 minute.When carrying out adding frame process, can according to the difference of the video frame number in this gop file of 1 minute with the video frame number preset, equally spaced insert frame of video, the frame of video of insertion can be copying of adjacent video frames.
Step S252, when the video frame number preset is less than the frame number of gop file, subtracts frame process to the frame of video in gop file, obtains the gop file meeting the video frame number preset.
Such as, unit time is set as 1 minute, and the video frame number preset is 25 frames, in the multiple gop files cut into, if the video frame number in certain gop file of 1 minute is 30 frames, then needs to subtract frame process to the frame of video in this gop file of 1 minute.When carrying out subtracting frame process, according to the difference of the video frame number in this gop file of 1 minute with the video frame number preset, equally spaced frame of video can be deleted.
In this embodiment, by the relation between the frame number of gop file and default video frame number, frame added to the frame of video in gop file or subtracts frame process, thus making the frame of video in the gop file after process meet default video frame rate.
In one embodiment, as shown in Figure 4, said method can also be embodied as following steps S41-S45:
Step S41, cuts into the gop file of multiple unit time by decoded video file, gop file comprises multiple frame of video.
Step S42, determines the frame per second of the gop file of each unit time.
Step S43, judges whether the frame per second of gop file meets the video frame rate preset.
Step S44, when the frame per second of gop file does not meet the video frame rate preset, processes the frame of video in gop file, obtains the gop file meeting the video frame rate preset.
Step S45, encodes to the gop file after process.
In this embodiment, when performing step S44, also according to the relation between the video frame rate preset and the video frame rate of gop file, frame can be added to the frame of video in gop file or subtracts frame process.Therefore, step S44 may be embodied as following steps:
When the video frame rate preset is larger than the frame per second of gop file, frame process is added to the frame of video in gop file, obtain the gop file meeting the video frame rate preset.Such as, unit time is set as 1 minute, the video frame rate preset is 25HZ (frame number namely per minute is 25 frames), in the multiple gop files cut into, if the video frame rate in certain gop file of 1 minute is 20HZ, then need to add frame process to the frame of video in this gop file of 1 minute.When carrying out adding frame process, can according to the difference of the video frame rate in this gop file of 1 minute with the video frame rate preset, equally spaced insert frame of video, the frame of video of insertion can be copying of adjacent video frames.
When the video frame rate preset is less than the frame per second of gop file, frame process is subtracted to the frame of video in gop file, obtain the gop file meeting the video frame rate preset.Such as, unit time is set as 1 minute, and the video frame rate preset is 25HZ, in the multiple gop files cut into, if the video frame rate in certain gop file of 1 minute is 30HZ, then needs to subtract frame process to the frame of video in this gop file of 1 minute.When carrying out subtracting frame process, according to the difference of the video frame rate in this gop file of 1 minute with the video frame rate preset, equally spaced frame of video can be deleted.
In this embodiment, by the relation between the frame per second of gop file and default video frame rate, frame added to the frame of video in gop file or subtracts frame process, thus making the frame of video in the gop file after process meet default video frame rate.
Corresponding to the method in above-described embodiment, the embodiment of the present invention also provides a kind of processing unit of video file, and as shown in Figure 5, this device comprises:
Cutting module 51, for decoded video file being cut into the gop file of multiple unit time, gop file comprises multiple frame of video;
Processing module 52, for according to the video frame rate preset, processes the frame of video in the gop file of each unit time, obtains the gop file meeting the video frame rate preset;
Coding module 53, for encoding to the gop file after process.
In one embodiment, as shown in Figure 6, cutting module 51 comprises:
Cutting submodule 511, cuts into the gop file of multiple unit time for adopting predetermined time standard method PTS by decoded video file.
In one embodiment, as shown in Figure 7, processing module 52 comprises:
First determines submodule 521, for according to the video frame rate preset, determines the video frame number preset;
Second determines submodule 522, for determining the frame number of the gop file of each unit time;
First judges submodule 523, for judging whether the frame number of gop file meets the video frame number preset;
First process submodule 524, for when the frame number of gop file does not meet the video frame number preset, processes the frame of video in gop file, obtains the gop file meeting the video frame number preset.
In one embodiment, as shown in Figure 8, the first process submodule 524 comprises:
Add frame unit 5241, for when the video frame number preset is larger than the frame number of gop file, frame process is added to the frame of video in gop file, obtain the gop file meeting the video frame number preset;
Subtract frame unit 5242, for when the video frame number preset is less than the frame number of gop file, frame process is subtracted to the frame of video in gop file, obtain the gop file meeting the video frame number preset.
In one embodiment, as shown in Figure 9, processing module 52 comprises:
3rd determines submodule 525, for determining the frame per second of the gop file of each unit time;
Second judges submodule 526, for judging whether the frame per second of gop file meets the video frame rate preset;
Second process submodule 527, for when the frame per second of gop file does not meet the video frame rate preset, processes the frame of video in gop file, obtains the gop file meeting the video frame rate preset.
Adopt the device that the embodiment of the present invention provides, by processing the frame of video in the gop file of unit time, make the frame of video in the gop file after processing meet default video frame rate, thus achieve the Video Quality Metric of dynamic frame per second the object of the video being fixing frame per second.
Those skilled in the art should understand, embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt the form of complete hardware embodiment, completely software implementation or the embodiment in conjunction with software and hardware aspect.And the present invention can adopt in one or more form wherein including the upper computer program implemented of computer-usable storage medium (including but not limited to magnetic disc store and optical memory etc.) of computer usable program code.
The present invention describes with reference to according to the flow chart of the method for the embodiment of the present invention, equipment (system) and computer program and/or block diagram.Should understand can by the combination of the flow process in each flow process in computer program instructions realization flow figure and/or block diagram and/or square frame and flow chart and/or block diagram and/or square frame.These computer program instructions can being provided to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, making the instruction performed by the processor of computer or other programmable data processing device produce device for realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
These computer program instructions also can be stored in can in the computer-readable memory that works in a specific way of vectoring computer or other programmable data processing device, the instruction making to be stored in this computer-readable memory produces the manufacture comprising command device, and this command device realizes the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
These computer program instructions also can be loaded in computer or other programmable data processing device, make on computer or other programmable devices, to perform sequence of operations step to produce computer implemented process, thus the instruction performed on computer or other programmable devices is provided for the step realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
Obviously, those skilled in the art can carry out various change and modification to the present invention and not depart from the spirit and scope of the present invention.Like this, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (10)
1. a processing method for video file, is characterized in that, comprising:
Decoded video file is cut into the gop file of multiple unit time, described gop file comprises multiple frame of video;
According to the video frame rate preset, the frame of video in the gop file of each unit time is processed, obtain the gop file meeting described default video frame rate;
Gop file after described process is encoded.
2. the method for claim 1, is characterized in that, the described gop file decoded video file being cut into multiple unit time, comprising:
Predetermined time standard method PTS is adopted decoded video file to be cut into the gop file of multiple unit time.
3. the method for claim 1, is characterized in that, the video frame rate that described basis is preset, and processes the frame of video in the gop file of each unit time, obtains the gop file meeting described default video frame rate, comprising:
According to the video frame rate preset, determine the video frame number preset;
Determine the frame number of the gop file of each unit time described;
Judge whether the frame number of described gop file meets described default video frame number;
When the frame number of described gop file does not meet described default video frame number, the frame of video in described gop file is processed, obtain the gop file meeting described default video frame number.
4. method as claimed in claim 3, is characterized in that, when the described frame number when described gop file does not meet described default video frame number, process the frame of video in described gop file, obtains the gop file meeting described default video frame number, comprising:
When described default video frame number is larger than the frame number of described gop file, frame process is added to the frame of video in described gop file, obtain the gop file meeting described default video frame number;
When described default video frame number is less than the frame number of described gop file, frame process is subtracted to the frame of video in described gop file, obtain the gop file meeting described default video frame number.
5. the method for claim 1, is characterized in that, the video frame rate that described basis is preset, and processes the frame of video in the gop file of each unit time, obtains the gop file meeting described default video frame rate, comprising:
Determine the frame per second of the gop file of each unit time described;
Judge whether the frame per second of described gop file meets described default video frame rate;
When the frame per second of described gop file does not meet described default video frame rate, the frame of video in described gop file is processed, obtain the gop file meeting described default video frame rate.
6. a processing unit for video file, is characterized in that, comprising:
Cutting module, for decoded video file being cut into the gop file of multiple unit time, described gop file comprises multiple frame of video;
Processing module, for according to the video frame rate preset, processes the frame of video in the gop file of each unit time, obtains the gop file meeting described default video frame rate;
Coding module, for encoding to the gop file after described process.
7. device as claimed in claim 6, it is characterized in that, described cutting module comprises:
Cutting submodule, cuts into the gop file of multiple unit time for adopting predetermined time standard method PTS by decoded video file.
8. device as claimed in claim 6, it is characterized in that, described processing module comprises:
First determines submodule, for according to the video frame rate preset, determines the video frame number preset;
Second determines submodule, for determining the frame number of the gop file of each unit time described;
First judges submodule, for judging whether the frame number of described gop file meets described default video frame number;
First process submodule, for when the frame number of described gop file does not meet described default video frame number, processes the frame of video in described gop file, obtains the gop file meeting described default video frame number.
9. device as claimed in claim 8, is characterized in that, described first process submodule comprises:
Add frame unit, for when described default video frame number is larger than the frame number of described gop file, frame process is added to the frame of video in described gop file, obtain the gop file meeting described default video frame number;
Subtract frame unit, for when described default video frame number is less than the frame number of described gop file, frame process is subtracted to the frame of video in described gop file, obtain the gop file meeting described default video frame number.
10. device as claimed in claim 6, it is characterized in that, described processing module comprises:
3rd determines submodule, for determining the frame per second of the gop file of each unit time described;
Second judges submodule, for judging whether the frame per second of described gop file meets described default video frame rate;
Second process submodule, for when the frame per second of described gop file does not meet described default video frame rate, processes the frame of video in described gop file, obtains the gop file meeting described default video frame rate.
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