CN105578207A - Video frame rate conversion method and device - Google Patents
Video frame rate conversion method and device Download PDFInfo
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- CN105578207A CN105578207A CN201510968556.4A CN201510968556A CN105578207A CN 105578207 A CN105578207 A CN 105578207A CN 201510968556 A CN201510968556 A CN 201510968556A CN 105578207 A CN105578207 A CN 105578207A
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- 238000006243 chemical reaction Methods 0.000 title claims abstract description 34
- 238000012545 processing Methods 0.000 claims description 13
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- 238000004590 computer program Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 3
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/234—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs
- H04N21/2343—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements
- H04N21/234381—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements by altering the temporal resolution, e.g. decreasing the frame rate by frame skipping
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs
- H04N21/4402—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display
- H04N21/440281—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display by altering the temporal resolution, e.g. by frame skipping
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- Engineering & Computer Science (AREA)
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- Television Systems (AREA)
Abstract
The invention relates to a video frame rate conversion method and a device. The video frame rate conversion method comprises steps of obtaining a video flow collected within a preset unit time, performing statistic on the numbers of the actual video frames of the video flow, obtaining the corresponding number of the target video frames in the preset unit time, determining the frame number to be processed according to the actual frame number and the target video frames, wherein the number of frames needed to be processed comprises the number of frames needed to be increased and number of frames needed to be reduced, calculating the sequence number of the number of frames needed to be processed according to the preset calculation formula, increasing the number of frames needed to be increased or reducing the number of frames needed to be reduced according to the sequence number to obtain the converted video flow, and performing coding on the converted video flow to obtain a video which can be played. The technical scheme of the invention can guarantee the instantaneity of the live broadcasting.
Description
Technical field
The present invention relates to technical field of video processing, particularly relate to a kind of method for converting video frame rate and device.
Background technology
Along with the development of science and technology, mobile phone becomes requisite article in people's life, mobile phone camera is utilized to carry out video capture and live application has a lot, but, owing to not supporting the video flowing gathering fixing frame per second when mobile video gathers, and the video flowing of live output requires it is fixing frame per second, therefore how to ensure the real-time of net cast, become technical problem urgently to be resolved hurrily at present.
Summary of the invention
The embodiment of the present invention provides a kind of method for converting video frame rate and device, comprises following technical scheme:
According to the first aspect of the embodiment of the present invention, a kind of method for converting video frame rate is provided, comprises:
Obtain the video flowing preset and gather in the unit interval;
Add up the actual video frame number of described video flowing;
Obtain target video frame number corresponding in the described default unit interval;
Determine to process frame number according to described actual video frame number and described target video frame number, described need process frame number comprise need increase frame number maybe need reduce frame number;
Respectively need process the sequence number of frame number according to default calculating formulae discovery, and by described sequence number increase described need increase frame number or reduce describedly need reduce frame number, obtain the video flowing after changing;
Encode to the video flowing after described conversion, obtaining can displaying video.
In one embodiment, described method also comprises:
The video flowing of described collection is put into the first frame of video queue;
Video flowing after described conversion is put into the second frame of video queue.
In one embodiment, describedly determine to process frame number according to described actual video frame number and described target video frame number, comprising:
Described actual video frame number and described target video frame number are compared;
When described actual video frame number is greater than described target video frame number, determine that the described frame number that need process is for need reduce frame number, need reduce frame number=actual video frame number-target video frame number;
When described actual video frame number is less than described target video frame number, determine that the described frame number that need process is for need increase frame number, need increase frame number=target video frame number-actual video frame number.
In one embodiment, described method also comprises:
When the described frame number that need process is for need reduce frame number, described default computing formula is:
Wherein, n is described actual video frame number, and m is described target video frame number, and i is the positive integer in 1 to n-m;
When the described frame number that need process is for need increase frame number, described default computing formula is:
Wherein, n is described actual video frame number, and m is described target video frame number, and i is the positive integer in 1 to m-n.
In one embodiment, described method also comprises:
Receive the default unit interval setting command of input;
According to described default unit interval setting command, the described default unit interval is set.
According to the second aspect of the embodiment of the present invention, a kind of video frame rate conversion equipment is provided, comprises:
First acquisition module, for obtaining the video flowing gathered in the default unit interval;
Statistical module, for adding up the actual video frame number of described video flowing;
Second acquisition module, for obtaining target video frame number corresponding in the described default unit interval;
Determination module, for determining to process frame number according to described actual video frame number and described target video frame number, described need process frame number comprise need increase frame number maybe need reduce frame number;
Computing module, for respectively need process the sequence number of frame number according to default calculating formulae discovery, and by described sequence number increase described need increase frame number or reduce describedly need reduce frame number, obtain the video flowing after changing;
Coding module, for encoding to the video flowing after described conversion, obtaining can displaying video.
In one embodiment, described device also comprises:
First processing module, for putting into the first frame of video queue by the video flowing of described collection;
Second processing module, for putting into the second frame of video queue by the video flowing after described conversion.
In one embodiment, described determination module comprises:
Comparison sub-module, for comparing described actual video frame number and described target video frame number;
First determines submodule, for when described actual video frame number is greater than described target video frame number, determines that the described frame number that need process is for need reduce frame number, need reduce frame number=actual video frame number-target video frame number;
Second determines submodule, for when described actual video frame number is less than described target video frame number, determines that the described frame number that need process is for need increase frame number, need increase frame number=target video frame number-actual video frame number.
In one embodiment, when the described frame number that need process is for need reduce frame number, described default computing formula is:
Wherein, n is described actual video frame number, and m is described target video frame number, and i is the positive integer in 1 to n-m;
When the described frame number that need process is for need increase frame number, described default computing formula is:
Wherein, n is described actual video frame number, and m is described target video frame number, and i is the positive integer in 1 to m-n.
In one embodiment, described device also comprises:
Receiver module, for receiving the default unit interval setting command of input;
Module is set, for according to described default unit interval setting command, the described default unit interval is set.
The technical scheme that embodiments of the invention provide can comprise following beneficial effect:
Technique scheme, the real-time of net cast can be ensured, and the video flowing of collection is put into the first frame of video queue, video flowing after conversion puts into the second frame of video queue, namely video acquisition process and frame rate conversion process are in different queues, like this, Frame directly operates in internal memory, and operating efficiency is high.And as far as possible little in order to ensure live time delay, what the default unit interval can be arranged in suitable scope is as far as possible little.Meanwhile, respectively need process the sequence number of frame number according to default calculating formulae discovery, like this, both ensure that and can carry out video frame rate conversion simply efficiently, and in turn ensure that the optimality of fidelity effect.
Should be understood that, it is only exemplary and explanatory that above general description and details hereinafter describe, and can not limit the present invention.
Accompanying drawing explanation
Accompanying drawing to be herein merged in specification and to form the part of this specification, shows embodiment according to the invention, and is used from specification one and explains principle of the present invention.
Fig. 1 is the flow chart of a kind of method for converting video frame rate according to an exemplary embodiment.
Fig. 2 is the flow chart of the another kind of method for converting video frame rate according to an exemplary embodiment.
Fig. 3 is the flow chart of step S104 in a kind of method for converting video frame rate according to an exemplary embodiment.
Fig. 4 is the flow chart of another method for converting video frame rate according to an exemplary embodiment.
Fig. 5 is the block diagram of a kind of video frame rate conversion equipment according to an exemplary embodiment.
Fig. 6 is the block diagram of the another kind of video frame rate conversion according to an exemplary embodiment.
Fig. 7 is the block diagram of determination module in a kind of video frame rate conversion equipment according to an exemplary embodiment.
Fig. 8 is the block diagram of another the video frame rate conversion equipment according to an exemplary embodiment.
Embodiment
Here will be described exemplary embodiment in detail, its sample table shows in the accompanying drawings.When description below relates to accompanying drawing, unless otherwise indicated, the same numbers in different accompanying drawing represents same or analogous key element.Execution mode described in following exemplary embodiment does not represent all execution modes consistent with the present invention.On the contrary, they only with as in appended claims describe in detail, the example of apparatus and method that aspects more of the present invention are consistent.
Embodiments provide a kind of method for converting video frame rate, the method can be used in terminal equipment, as shown in Figure 1, and the method comprising the steps of S101-S106:
In step S101, obtain the video flowing preset and gather in the unit interval;
In step s 102, the actual video frame number of video flowing is added up;
In step s 103, the target video frame number presetting correspondence in the unit interval is obtained;
In step S104, determine to process frame number according to actual video frame number and target video frame number, need process frame number comprise need increase frame number maybe need reduce frame number;
In step S105, respectively need process the sequence number of frame number according to default calculating formulae discovery, and frame number need be increased or reduce need reduce frame number by sequence number increase, obtain the video flowing after changing;
In step s 106, encode to the video flowing after conversion, obtaining can displaying video.
In this embodiment, statistics presets the actual video frame number of the video flowing gathered in the unit interval, and obtain the target video frame number presetting correspondence in the unit interval, thus carry out frame rate conversion according to actual video frame number and target video frame number, thus obtain the video flowing after changing, and play after encoding, like this, ensure that the real-time of net cast.
As shown in Figure 2, in one embodiment, said method also comprises step S201-S202:
In step s 201, the video flowing of collection is put into the first frame of video queue;
In step S202, the video flowing after conversion is put into the second frame of video queue.
In this embodiment, the video flowing of collection is put into the first frame of video queue, the video flowing after conversion puts into the second frame of video queue, namely video acquisition process and frame rate conversion process are in different queues, like this, Frame directly operates in internal memory, and operating efficiency is high.
As shown in Figure 3, in one embodiment, above-mentioned steps S104 comprises step S301-S303:
In step S301, actual video frame number and target video frame number are compared;
In step s 302, when actual video frame number is greater than target video frame number, determine need process frame number for frame number need be reduced, frame number=actual video frame number-target video frame number need be reduced;
In step S303, when actual video frame number is less than target video frame number, determine need process frame number for frame number need be increased, frame number=target video frame number-actual video frame number need be increased.
In this embodiment, according to actual video frame number and target video frame number, calculate and need increase frame number and need frame number be reduced, thus complete frame rate conversion.
In one embodiment, said method also comprises:
When processing frame number for need reduce frame number, default computing formula is:
Wherein, n is actual video frame number, and m is target video frame number, and i is the positive integer in 1 to n-m;
When processing frame number for need increase frame number, default computing formula is:
Wherein, n is actual video frame number, and m is target video frame number, and i is the positive integer in 1 to m-n.
In this embodiment, when carrying out frame of video number conversion, increase video frame number and reduce video frame number and can need increase frame number and each sequence number that need reduce frame number according to the calculating of different computing formula is each, thus according to the equidistant increase frame number of sequence number or minimizing frame number, thus both ensure that and can carry out video frame rate conversion simply efficiently, in turn ensure that the optimality of fidelity effect.
Such as,
N: be the actual video frame number gathered in the default unit interval of frame rate conversion;
M: be target video frame number corresponding in the unit interval of frame rate conversion.
Reduce the algorithm of frame of video:
The frame number reduced is needed to be n-m
Sequence number corresponding to the frame of minimizing is needed to be respectively:
n/(n-m),2*(n/(n-m)),……,(n-m)*(n/(n-m))。
Increase the algorithm of frame of video:
The frame number increased is needed to be m-n
Sequence number corresponding to the frame of increase is needed to be respectively:
m/(m-n),2*(m/(m-n)),……..,(m-n)*(m/(m-n))。
As shown in Figure 4, in one embodiment, said method also comprises step S401-S402:
In step S401, receive the default unit interval setting command of input;
In step S402, according to default unit interval setting command, be set the default unit interval.
In this embodiment, user can rule of thumb be arranged the default unit interval, as small as possible in order to ensure net cast time delay, and the chronomere of general frame rate conversion should be as far as possible little.But chronomere is too little can cause again the frequent operation increasing and reduce frame.This chronomere can determine through repeatedly testing later evaluation for this reason.
Following is disclosure device embodiment, may be used for performing disclosure embodiment of the method.
Fig. 5 is the block diagram of a kind of video frame rate conversion equipment according to an exemplary embodiment, and this device can realize becoming the some or all of of terminal equipment by software, hardware or both combinations.As shown in Figure 5, this download management device comprises:
First acquisition module 51, for obtaining the video flowing gathered in the default unit interval;
Statistical module 52, for adding up the actual video frame number of described video flowing;
Second acquisition module 53, for obtaining target video frame number corresponding in the described default unit interval;
Determination module 54, for determining to process frame number according to described actual video frame number and described target video frame number, described need process frame number comprise need increase frame number maybe need reduce frame number;
Computing module 55, for respectively need process the sequence number of frame number according to default calculating formulae discovery, and by described sequence number increase described need increase frame number or reduce describedly need reduce frame number, obtain the video flowing after changing;
Coding module 56, for encoding to the video flowing after described conversion, obtaining can displaying video.
As shown in Figure 6, in one embodiment, said apparatus also comprises:
First processing module 61, for putting into the first frame of video queue by the video flowing of described collection;
Second processing module 62, for putting into the second frame of video queue by the video flowing after described conversion.
As shown in Figure 7, in one embodiment, described determination module 54 comprises:
Comparison sub-module 71, for comparing described actual video frame number and described target video frame number;
First determines submodule 72, for when described actual video frame number is greater than described target video frame number, determines that the described frame number that need process is for need reduce frame number, need reduce frame number=actual video frame number-target video frame number;
Second determines submodule 73, for when described actual video frame number is less than described target video frame number, determines that the described frame number that need process is for need increase frame number, need increase frame number=target video frame number-actual video frame number.
In one embodiment, when the described frame number that need process is for need reduce frame number, described default computing formula is:
Wherein, n is described actual video frame number, and m is described target video frame number, and i is the positive integer in 1 to n-m;
When the described frame number that need process is for need increase frame number, described default computing formula is:
Wherein, n is described actual video frame number, and m is described target video frame number, and i is the positive integer in 1 to m-n.
As shown in Figure 8, in one embodiment, said apparatus also comprises:
Receiver module 81, for receiving the default unit interval setting command of input;
Module 82 is set, for according to described default unit interval setting command, the described default unit interval is set.
About the device in above-described embodiment, wherein the concrete mode of modules executable operations has been described in detail in about the embodiment of the method, will not elaborate explanation herein.
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 method for converting video frame rate, is characterized in that, comprising:
Obtain the video flowing preset and gather in the unit interval;
Add up the actual video frame number of described video flowing;
Obtain target video frame number corresponding in the described default unit interval;
Determine to process frame number according to described actual video frame number and described target video frame number, described need process frame number comprise need increase frame number maybe need reduce frame number;
Respectively need process the sequence number of frame number according to default calculating formulae discovery, and by described sequence number increase described need increase frame number or reduce describedly need reduce frame number, obtain the video flowing after changing;
Encode to the video flowing after described conversion, obtaining can displaying video.
2. method according to claim 1, is characterized in that, described method also comprises:
The video flowing of described collection is put into the first frame of video queue;
Video flowing after described conversion is put into the second frame of video queue.
3. method according to claim 1, is characterized in that, describedly determines to process frame number according to described actual video frame number and described target video frame number, comprising:
Described actual video frame number and described target video frame number are compared;
When described actual video frame number is greater than described target video frame number, determine that the described frame number that need process is for need reduce frame number, need reduce frame number=actual video frame number-target video frame number;
When described actual video frame number is less than described target video frame number, determine that the described frame number that need process is for need increase frame number, need increase frame number=target video frame number-actual video frame number.
4. method according to claim 3, is characterized in that, described method also comprises:
When the described frame number that need process is for need reduce frame number, described default computing formula is:
Wherein, n is described actual video frame number, and m is described target video frame number, and i is the positive integer in 1 to n-m;
When the described frame number that need process is for need increase frame number, described default computing formula is:
Wherein, n is described actual video frame number, and m is described target video frame number, and i is the positive integer in 1 to m-n.
5. method according to any one of claim 1 to 4, is characterized in that, described method also comprises:
Receive the default unit interval setting command of input;
According to described default unit interval setting command, the described default unit interval is set.
6. a video frame rate conversion equipment, is characterized in that, comprising:
First acquisition module, for obtaining the video flowing gathered in the default unit interval;
Statistical module, for adding up the actual video frame number of described video flowing;
Second acquisition module, for obtaining target video frame number corresponding in the described default unit interval;
Determination module, for determining to process frame number according to described actual video frame number and described target video frame number, described need process frame number comprise need increase frame number maybe need reduce frame number;
Computing module, for respectively need process the sequence number of frame number according to default calculating formulae discovery, and by described sequence number increase described need increase frame number or reduce describedly need reduce frame number, obtain the video flowing after changing;
Coding module, for encoding to the video flowing after described conversion, obtaining can displaying video.
7. device according to claim 6, is characterized in that, described device also comprises:
First processing module, for putting into the first frame of video queue by the video flowing of described collection;
Second processing module, for putting into the second frame of video queue by the video flowing after described conversion.
8. device according to claim 6, is characterized in that, described determination module comprises:
Comparison sub-module, for comparing described actual video frame number and described target video frame number;
First determines submodule, for when described actual video frame number is greater than described target video frame number, determines that the described frame number that need process is for need reduce frame number, need reduce frame number=actual video frame number-target video frame number;
Second determines submodule, for when described actual video frame number is less than described target video frame number, determines that the described frame number that need process is for need increase frame number, need increase frame number=target video frame number-actual video frame number.
9. device according to claim 8, is characterized in that,
When the described frame number that need process is for need reduce frame number, described default computing formula is:
Wherein, n is described actual video frame number, and m is described target video frame number, and i is the positive integer in 1 to n-m;
When the described frame number that need process is for need increase frame number, described default computing formula is:
Wherein, n is described actual video frame number, and m is described target video frame number, and i is the positive integer in 1 to m-n.
10. the device according to any one of claim 6 to 9, is characterized in that, described device also comprises:
Receiver module, for receiving the default unit interval setting command of input;
Module is set, for according to described default unit interval setting command, the described default unit interval is set.
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| CN111885337A (en) * | 2020-06-19 | 2020-11-03 | 成都东方盛行电子有限责任公司 | Multi-frame-rate video efficient editing method |
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| CN111698555A (en) * | 2020-06-19 | 2020-09-22 | 浙江大华技术股份有限公司 | Video frame extraction processing method and device |
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| CN111885336A (en) * | 2020-06-19 | 2020-11-03 | 成都东方盛行电子有限责任公司 | Non-frame-coding rate conversion method under frame mode |
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| CN113163260A (en) * | 2021-03-09 | 2021-07-23 | 北京百度网讯科技有限公司 | Video frame output control method and device and electronic equipment |
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