CN107155093A - A kind of video previewing method, device and equipment - Google Patents
A kind of video previewing method, device and equipment Download PDFInfo
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- CN107155093A CN107155093A CN201710474658.XA CN201710474658A CN107155093A CN 107155093 A CN107155093 A CN 107155093A CN 201710474658 A CN201710474658 A CN 201710474658A CN 107155093 A CN107155093 A CN 107155093A
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- code stream
- decoding
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
- H04N7/183—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast for receiving images from a single remote source
-
- 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, rendering scenes according to MPEG-4 scene graphs
- H04N21/4402—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display
- H04N21/440263—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display by altering the spatial resolution, e.g. for displaying on a connected PDA
-
- 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]
- H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client
- H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
- H04N21/643—Communication protocols
- H04N21/6437—Real-time Transport Protocol [RTP]
Abstract
The present invention is applied to video preview field to be included there is provided a kind of video previewing method：Obtain the resolution ratio of the code stream of video preview passage；According to the resolution ratio of the code stream of video preview passage, the decoding consumed resource corresponding to video preview passage is calculated；When the code stream to video preview passage is decoded, judge whether the corresponding decoding consumed resource of the code stream is more than system spare stock number；If the corresponding consumed resource that decodes of the code stream is more than system spare stock number, judged according to next code stream of the code stream of current video preview passage.So that limited decoding resource is reasonably distributed, it is to avoid because occurring causing bottom decoding resource allocation to fail the resolution ratio of code stream is excessive and the problem of lookahead delay is excessive occur.
Description
Technical field
The invention belongs to video preview field, more particularly to a kind of video previewing method, device and equipment.
Background technology
NVR (Network Video Recorder) is a kind of network storage equipment, and its main function is by network
Receive the digital video bit stream that transmits of IPC (IP Camera) equipment, and provide to the storage of multichannel code stream, management, playback and
The functions such as preview.In high-definition network video monitor supervision platform, because data volume is big and decodes and the factor such as is limited by hardware resource,
And bandwidth usage is depended on per the compression level of road video image, frame sign (i.e. the corresponding resolution sizes of frame), frame speed
Rate and code check, wherein frame sign influence whether to decode the distribution of resource again, therefore, in limited bandwidth and hardware decoding resource
Under, the problem of excessive frame sign and frame rate can all cause preview experience difference occurs.
The motion state of IPC ends video is more violent, and the video data volume that can cause in the IPC unit interval is bigger, it is on the contrary then
It is smaller.Under limited bandwidth resources, it is likely to result in network congestion if not adjusting its code check and causes network delay to increase,
So as to cause preview function abnormal.
In order to avoid preview function is abnormal, a kind of current way be empirically a default motion state priority with
The corresponding relation of passage maximal rate, the motion state of each passway code stream is then detected in real time, and to calculate its motion state excellent
First level, is finally adjusted to corresponding code check value according to the priority, so as to realize the dynamically distributes of bandwidth resources, reduces net
Network postpones.But, limited by decoding resource, when decoding inadequate resource at NVR ends, still result in serious decoding and prolong
Late.
The content of the invention
In view of this, the embodiments of the invention provide a kind of video previewing method, device and equipment, to solve prior art
During middle video preview, due to decoding the limitation of resource, the problem of causing decoding delay.
The first aspect of the embodiment of the present invention provides a kind of video previewing method, and the video previewing method includes：
Obtain the resolution ratio of the code stream of video preview passage；
According to the resolution ratio of the code stream of video preview passage, the decoding resource consumption corresponding to video preview passage is calculated
Amount；
When the code stream to video preview passage is decoded, whether the corresponding decoding consumed resource of the code stream is judged
More than system spare stock number；
If the corresponding consumed resource that decodes of the code stream is more than system spare stock number, according to current video preview
Next code stream of the code stream of passage is judged.
It is described according to video preview passage with reference in a first aspect, in the first possible implementation of first aspect
The resolution ratio of code stream, the step of calculating the decoding consumed resource corresponding to video preview passage includes：
Decoding consumed resource according to corresponding to formula M=a*F+b calculates video preview passage, wherein M provides for decoding
Source consumption, a is the consumption radix related to decoding chip, and F is frame sign, and b is the auxiliary knot unrelated with the frame sign of decoding
The resource that structure is consumed.
With reference in a first aspect, may be in implementation at second of first aspect, the video preview passage that obtains
The step of resolution ratio of code stream is：
Parameter frame under the primary condition for the code stream for obtaining video preview passage, point of code stream is read according to the parameter frame
Resolution.
With reference in a first aspect, in the third possible implementation of first aspect, the code stream correspondence is judged described
Decoding consumed resource whether be more than system spare stock number the step of before, methods described also includes：
Judge whether the resolution ratio or system spare stock number of the code stream of the video preview passage change, if hair
Changing, then judge whether the corresponding decoding consumed resource of the code stream is more than system spare stock number.
It is described according to video preview passage with reference in a first aspect, in the 4th kind of possible implementation of first aspect
The resolution ratio of code stream, the step of calculating the decoding consumed resource corresponding to video preview passage includes：
Resolution ratio belonging to the resolution ratio for the code stream for searching video preview passage is interval；
According to the interval corresponding relation with decoding consumed resource of default resolution ratio, the video preview passage is searched
Decoding consumed resource corresponding to the resolution ratio of code stream.
It is described according to video preview passage with reference in a first aspect, in the 5th kind of possible implementation of first aspect
The resolution ratio of code stream, the step of calculating the decoding consumed resource corresponding to video preview passage includes：
According to default resolution ratio and decoding consumed resource or the corresponding table of decoding resource consumption value, in the corresponding table
Decoding consumed resource or decoding resource consumption value corresponding to the resolution ratio of the middle code stream for searching the video preview passage.
With reference in a first aspect, in the 6th kind of possible implementation of first aspect, the video preview passage includes many
Individual passage, the step of next code stream of the code stream of the selection current video preview passage is judged includes：
According to the priority orders of the code stream of multichannel set in advance, under the code stream for selecting each video preview passage
One priority code stream is played out.
With reference in a first aspect, in the 7th kind of possible implementation of first aspect, the judgement code stream is corresponding
The step of whether decoding consumed resource is more than system spare stock number includes：
The corresponding decoding consumed resource of code stream is converted into code stream consumption figures by conversion formula, and by the system
Surplus yield is converted to system spare resource value, then the decoding resource consumption value and system spare by conversion formula
The size of resource value, wherein, the conversion formula is：| (X+M/2)/M |=Y, X are stock number, and X is resource value, and M is conversion times
Number.
The second aspect of the embodiment of the present invention provides a kind of video preview device, and the video preview device includes：
Resolution ratio acquiring unit, the resolution ratio of the code stream for obtaining video preview passage；
Consumed resource computing unit is decoded, for the resolution ratio of the code stream according to video preview passage, video preprocessor is calculated
The decoding consumed resource look at corresponding to passage；
Judging unit, for when the code stream to video preview passage is decoded, judging the corresponding decoding of the code stream
Whether consumed resource is more than system spare stock number；
Code stream selection unit, if being more than system spare stock number for the corresponding decoding consumed resource of the code stream,
Then judged according to next code stream of the code stream of current video preview passage.
With reference to second aspect, in the first possible implementation of second aspect, the decoding consumed resource is calculated
Unit is used for：
Decoding consumed resource according to corresponding to formula M=a*F+b calculates video preview passage, wherein M provides for decoding
Source consumption, a is the consumption radix related to decoding chip, and F is frame sign, and b is the auxiliary knot unrelated with the frame sign of decoding
The resource that structure is consumed.
With reference to second aspect, in second of possible implementation of second aspect, the resolution ratio acquiring unit is used for：
Parameter frame under the primary condition for the code stream for obtaining video preview passage, point of code stream is read according to the parameter frame
Resolution.
The third aspect of the embodiment of the present invention provides a kind of video preview equipment, including memory, processor and deposits
Store up the computer program that can be run in the memory and on the processor, it is characterised in that the computing device
Realized during the computer program as described in any one of first aspect the step of video previewing method.
The fourth aspect of the embodiment of the present invention provides a kind of computer-readable recording medium, the computer-readable storage
Media storage has computer program, realizes and is regarded as described in any one of first aspect when the computer program is executed by processor
The step of frequency method for previewing.
The beneficial effect that the embodiment of the present invention exists compared with prior art is：By the code stream for obtaining video preview passage
Resolution ratio, and the resolution ratio of the code stream according to video preview passage calculates the decoding resource corresponding to video preview passage and disappears
Consumption, the decoding consumed resource required for code stream is compared with system spare stock number, is selected when that can not meet decoding needs
Select next code stream to be decoded, so that limited decoding resource is reasonably distributed, it is to avoid because there is code stream
Resolution ratio is excessive and causes that bottom decodes resource allocation failure and lookahead delay occur excessive.
Brief description of the drawings
Technical scheme in order to illustrate the embodiments of the present invention more clearly, below will be to embodiment or description of the prior art
In required for the accompanying drawing that uses be briefly described, it should be apparent that, drawings in the following description are only some of the present invention
Embodiment, for those of ordinary skill in the art, without having to pay creative labor, can also be according to these
Accompanying drawing obtains other accompanying drawings.
Fig. 1 is the system structure diagram of NVR networks provided in an embodiment of the present invention；
Fig. 2 is the implementation process schematic diagram of video previewing method provided in an embodiment of the present invention；
Fig. 3 is the interaction flow schematic diagram of another video previewing method provided in an embodiment of the present invention；
Fig. 4 is the schematic diagram of video preview device provided in an embodiment of the present invention；
Fig. 5 is the schematic diagram of video preview equipment provided in an embodiment of the present invention.
Embodiment
In describing below, in order to illustrate rather than in order to limit, it is proposed that such as tool of particular system structure, technology etc
Body details, thoroughly to understand the embodiment of the present invention.However, it will be clear to one skilled in the art that there is no these specific
The present invention can also be realized in the other embodiments of details.In other situations, omit to well-known system, device, electricity
Road and the detailed description of method, in case unnecessary details hinders description of the invention.
In order to illustrate technical solutions according to the invention, illustrated below by specific embodiment.
It is that (English full name is Network Video Recorder to NVR, and Chinese full name is recorded for network hard disc as shown in Figure 1
Camera) network system structural representation, causing the factor of NVR network delays includes：Imaging lag (CCD imaging performances), regard
Frequency coding delay (coding chip performance), network delay (data volume is big), buffer delay (software resource limitation) and decoding
Postpone (hardware resource limitation).The fortune of IPC (English full name is IP Camera, and Chinese full name is IP network camera) end video
Dynamic state is more violent, and the video data volume that can cause in the IPC unit interval is bigger, on the contrary then smaller.Wherein, RTSPS English
Full name is Time Streaming Protocol Server, and Chinese full name is RTP server.In prior art
On the basis of solution network delay, in order to avoid postponing occurs in multi-channel video preview, it is necessary to further be proposed to decoding delay
Corresponding solution.
Fig. 2 is a kind of implementation process of video previewing method provided in an embodiment of the present invention, and details are as follows：
In step s 201, the resolution ratio of the code stream of video preview passage is obtained.
Specifically, the video preview passage can be single video preview passage, it may also comprise multiple video previews and lead to
Road.The acquisition of the resolution ratio of the code stream of each video preview passage in multiple passages, can be while video preview, in real time
Acquisition.In the video preview of multichannel, according to user the need for, different layout informations can be set, can include four
Road, eight tunnels, nine tunnels, 16 tunnels, 25 tunnels or 36 road video preview layout informations etc..Include main bit stream on each passage
And subcode stream.
Obtain resolution ratio mode, can by the parameter frame under the primary condition for the code stream for obtaining video preview passage,
The resolution ratio of code stream is read according to the parameter frame.Such as, H.264, H.265 under form, had in code stream under initial situation
(English full name is by one SPS (English full name is Sequence Parameter Set, and Chinese full name is sequence parameter set), PPS
Picture Parameter Set, Chinese full name is picture parameter set) parameter frame, it have recorded in subsequent data frame in the frame
The resolution information of image.Implement, the information can be written in the management data of code stream.This step is in realization
Only need to when getting bit stream data, the current resolution information of the code stream inquired is recorded, by current record
Resolution ratio and the resolution ratio that records before compared with, it can be determined that whether resolution ratio changes.
In step S202, according to the resolution ratio of the code stream of video preview passage, calculate corresponding to video preview passage
Decode consumed resource.
Specifically, according to the resolution ratio of the code stream of video preview passage, decoding resource corresponding to each passage is calculated
Consumption, can include three kinds of modes, be respectively：
Mode one：
Decoding consumed resource according to corresponding to formula M=a*F+b calculates video preview passage, wherein M provides for decoding
Source consumption, a is the consumption radix related to decoding chip, and F is frame sign, and b is the auxiliary knot unrelated with the frame sign of decoding
The resource that structure is consumed.Wherein, parameter b numerical value is relevant with decoding chip, can when no video is decoded, read it is current by
The resource that Video decoding module is consumed is parameter b size, can test and set in advance when equipment is dispatched from the factory.It is described
Parameter a can calculate the numerical value for obtaining parameter a, also can test and set before dispatching from the factory according to multiple statistical test.NVR
The decoding resource-constrained of the base layer decoder of equipment, under live preview mode, if decoded data frame information needs to disappear
In the case of the resource of consumption arrives greatly bottom and can not met, corresponding processing is not done on upper strata, can cause the waste of underlying resource, simultaneously
The loss of data frame is will also result in, so that exception occurs in preview function.
In order to avoid decoding inadequate resource, the size of the internal memory for the underlying resource that this step is consumed to different frame signs,
And according to sampled point, calculate decoding consumed resource M=a*F+b.Wherein, frame sign consumption radix NVR decoding chips and
IP Camera IPC sample rate is related, and the resource b of supplementary structure consumption is related to NVR implementation.Meanwhile, we will
The maximum memory number that bottom decoding chip is possessed regards the decoding resource maximum of chip.
In order to further improve relative efficiency, it is to avoid consume the premier of more hardware resource when step-by-step is compared, this
Invention is described to judge that the step of whether corresponding decoding consumed resource of the code stream is more than system spare stock number can be：
The corresponding decoding consumed resource of code stream is converted into code stream consumption figures by conversion formula, and by the system
Surplus yield is converted to system spare resource value, then the decoding resource consumption value and system spare by conversion formula
The size of resource value, wherein, the conversion formula is：| (X+M/2)/M |=Y, X are stock number, and X is resource value, and M is conversion times
Number, such as M can be 10 etc., " | | " it is rounding operation.
By the way that consumption is scaled into resource value, the complexity of the comparison to stock number size can be greatly reduced, is led to
Crossing resource value can be compared with more efficiently, be conducive to improving relative efficiency.
Mode two：
According to default resolution ratio and decoding consumed resource or the corresponding table of decoding resource consumption value, in the corresponding table
Decoding consumed resource or decoding resource consumption value corresponding to the resolution ratio of the middle code stream for searching the video preview passage.Institute
The resolution ratio in corresponding table is stated, common resolution ratio can be selected.The corresponding table can in advance by staff statistics or
Calculating is obtained.By tabling look-up, the consumed resource or resource consumption value corresponding to resolution ratio more can be quickly found, just
In follow-up comparison.
Mode three：
On the basis of the corresponding table of mode two, the division of line range is further entered to resolution ratio so that corresponding relation is more
Plus simplify, the lookup of specific decoding consumed resource may comprise steps of：
2.1 resolution ratio searched belonging to the resolution ratio of the code stream of video preview passage are interval；
2.2 according to the interval corresponding relation with decoding consumed resource of default resolution ratio, searches the video preview and leads to
Decoding consumed resource corresponding to the resolution ratio of the code stream in road.
The interval corresponding relation with decoding consumed resource of the resolution ratio different by presetting, the corresponding relation can be with
Set up according to statistics.In addition, according to the statistics of the resolution ratio of the common code stream in IPC ends, common resolution ratio can be set
Corresponding decoding consumed resource, so as to quickly search the decoding consumed resource corresponding to the video at IPC ends.
In step S203, when the code stream to video preview passage is decoded, the corresponding decoding of the code stream is judged
Whether consumed resource is more than system spare stock number.
When the code stream to video preview passage is decoded, the resolution ratio of code stream is obtained in real time, and according to described point
Resolution searches corresponding decoding consumed resource, while obtaining current system spare stock number, both are compared,
Obtain whether system currently can meet the resource requirement decoded to the code stream of current channel.
In step S204, if the corresponding decoding consumed resource of the code stream is more than system spare stock number, root
Next code stream according to the code stream of current video preview passage is judged.
It is logical according to video preview if the decoding resource of system can not meet the decoding request of the code stream of current passage
Next code stream of the code stream in road is judged.If the decoding resource corresponding to the resolution ratio of next code stream is surplus still above system
Remaining stock number, the then next code stream for obtaining next code stream again is judged, until judgement obtains the corresponding solution of resolution ratio of code stream
Code resource is less than system spare stock number, then carries out decoding operate to the code stream.
In optional embodiment, the priority orders of code stream can also be preset, it is undesirable in current code stream
When (the decoding resource of system can not meet the decoding request of the code stream of current passage), the code stream of next priority is selected,
The code stream of next priority is decoded.
Wherein, when being decoded to the code stream of next priority, the code stream of next priority can equally be obtained
Resolution ratio, and the decoding resource consumption value corresponding to the resolution ratio is searched, will be described if system can meet its decoding request
Code stream is directly sent to base layer decoder.If system is still not able to meet its decoding request, continue to search for described next
The code stream of next priority corresponding to the code stream of priority, desired code stream is met until finding.
Such as the implementation process that Fig. 3 is another video previewing method provided in an embodiment of the present invention, details are as follows：
In step S301, the resolution ratio of the code stream of video preview passage is obtained.
In step s 302, according to the resolution ratio of the code stream of video preview passage, calculate corresponding to video preview passage
Decode consumed resource.
In step S303, judge whether the resolution ratio or system spare stock number of the code stream of the video preview passage are sent out
Changing.
Specifically, the resolution value of the code stream of the video preview passage is in the event of changing, by the change of the resolution of code stream
Change, the change of decoding resource consumption value will necessarily be changed accordingly.In addition, the change of system spare stock number, can include regarding
Whether the layout information and code stream attribute of frequency change to judge.For the change of the layout information of video, such as preview is drawn
The change of the layout information of 4 pictures, 8 pictures, 9 pictures, 16 pictures, 25 pictures or 36 pictures is set on face；Code stream attribute is
No change can equally cause the change of system spare resource value, such as set the code stream of the lower video preview passage of each layout
Attribute for main bit stream or subcode stream etc..Code stream in configuration that can be according to user and layout information adjustment current channel
Order, and the code stream order of the configuration of user priority be higher than layout information priority.
In step s 304, in the event of changing, then when the code stream to video preview passage is decoded, judge described
Whether the corresponding decoding consumed resource of code stream is more than system spare stock number.
In step S305, if the corresponding decoding consumed resource of the code stream is more than system spare stock number, root
Next code stream according to the code stream of current video preview passage is judged.
Video previewing method described in Fig. 3, on the basis of Fig. 2 further to decoding consumption resource whether change into
Row judges, so as to reduce the calculation times to system spare resource.Only when decoding consumed resource changes, than
As layout information changes or when code stream attribute changes, and can be to decoding consumed resource and decoding resource before
Consumption compares, and if greater than decoding consumed resource before, the resource of system spare is just obtained, so as to reduce to being
The calculation times for remaining resource of uniting.
It should be understood that the size of the sequence number of each step is not meant to the priority of execution sequence, each process in above-described embodiment
Execution sequence should determine that the implementation process without tackling the embodiment of the present invention constitutes any limit with its function and internal logic
It is fixed.
Fig. 4 is the structural representation of the video preview devices notified provided in an embodiment of the present invention more, and details are as follows：
The video preview device notified includes more：
Resolution ratio acquiring unit 401, the resolution ratio of the code stream for obtaining video preview passage；
Consumed resource computing unit 402 is decoded, for the resolution ratio of the code stream according to video preview passage, video is calculated
Decoding consumed resource corresponding to preview passage；
Judging unit 403, for when the code stream to video preview passage is decoded, judging the corresponding solution of the code stream
Whether code consumed resource is more than system spare stock number；
Code stream selection unit 404, if being more than system spare resource for the corresponding decoding consumed resource of the code stream
Amount, then judged according to next code stream of the code stream of current video preview passage.
It is preferred that, the decoding consumed resource computing unit is used for：
Decoding consumed resource according to corresponding to formula M=a*F+b calculates video preview passage, wherein M provides for decoding
Source consumption, a is the consumption radix related to decoding chip, and F is frame sign, and b is the auxiliary knot unrelated with the frame sign of decoding
The resource that structure is consumed.
It is preferred that, the resolution ratio acquiring unit is used for：
Parameter frame under the primary condition for the code stream for obtaining video preview passage, point of code stream is read according to the parameter frame
Resolution.
Video preview device described in the embodiment of the present invention, it is corresponding with the video previewing method described in Fig. 2-3.
Fig. 5 is the schematic diagram for the video preview equipment that one embodiment of the invention is provided.As shown in figure 5, the embodiment is regarded
Frequency preview device 5 includes：Processor 50, memory 51 and it is stored in the memory 51 and can be on the processor 50
The computer program 52 of operation, such as video preview program.The processor 50 is realized when performing the computer program 52
State the step in each video previewing method embodiment, such as step 201 shown in Fig. 2 to 204.Or, the processor 50
The function of each module/unit in above-mentioned each device embodiment, such as module shown in Fig. 4 are realized when performing the computer program 52
401 to 404 function.
Exemplary, the computer program 52 can be divided into one or more module/units, it is one or
Multiple module/units are stored in the memory 51, and are performed by the processor 50, to complete the present invention.Described one
Individual or multiple module/units can complete the series of computation machine programmed instruction section of specific function, and the instruction segment is used for
Implementation procedure of the computer program 52 in the video preview equipment 5 is described.For example, the computer program 52 can be with
It is divided into resolution ratio acquiring unit, decoding consumed resource computing unit, judging unit, code stream selection unit, each module tool
Body function is as follows：
Resolution ratio acquiring unit, the resolution ratio of the code stream for obtaining video preview passage；
Consumed resource computing unit is decoded, for the resolution ratio of the code stream according to video preview passage, video preprocessor is calculated
The decoding consumed resource look at corresponding to passage；
Judging unit, for when the code stream to video preview passage is decoded, judging the corresponding decoding of the code stream
Whether consumed resource is more than system spare stock number；
Code stream selection unit, if being more than system spare stock number for the corresponding decoding consumed resource of the code stream,
Then judged according to next code stream of the code stream of current video preview passage.
The video preview equipment 5 can be that desktop PC, notebook, palm PC and cloud server etc. are calculated
Equipment.The video preview equipment may include, but be not limited only to, processor 50, memory 51.Those skilled in the art can manage
Solution, Fig. 5 is only the example of video preview equipment 5, does not constitute the restriction to video preview equipment 5, can be included than diagram
More or less parts, either combine some parts or different parts, such as described video preview equipment can also be wrapped
Include input-output equipment, network access equipment, bus etc..
Alleged processor 50 can be CPU (Central Processing Unit, CPU), can also be
Other general processors, digital signal processor (Digital Signal Processor, DSP), application specific integrated circuit
(Application Specific Integrated Circuit, ASIC), ready-made programmable gate array (Field-
Programmable Gate Array, FPGA) or other PLDs, discrete gate or transistor logic,
Discrete hardware components etc..General processor can be microprocessor or the processor can also be any conventional processor
Deng.
The memory 51 can be the internal storage unit of the video preview equipment 5, such as video preview equipment 5
Hard disk or internal memory.The memory 51 can also be the External memory equipment of the video preview equipment 5, for example institute's video preview
The plug-in type hard disk being equipped with equipment 5, intelligent memory card (Smart Media Card, SMC), secure digital (Secure
Digital, SD) card, flash card (Flash Card) etc..Further, the memory 51 can also both include the video
The internal storage unit of preview device 5 also includes External memory equipment.The memory 51 is used to store the computer program
And other programs and data needed for the video preview equipment.The memory 51 can be also used for temporarily storing
Output or the data that will be exported.
It is apparent to those skilled in the art that, for convenience of description and succinctly, only with above-mentioned each work(
Energy unit, the division progress of module are for example, in practical application, as needed can distribute above-mentioned functions by different
Functional unit, module are completed, i.e., the internal structure of described device is divided into different functional unit or module, more than completion
The all or part of function of description.Each functional unit, module in embodiment can be integrated in a processing unit, also may be used
To be that unit is individually physically present, can also two or more units it is integrated in a unit, it is above-mentioned integrated
Unit can both be realized in the form of hardware, it would however also be possible to employ the form of SFU software functional unit is realized.In addition, each function list
Member, the specific name of module are also only to facilitate mutually differentiation, is not limited to the protection domain of the application.Said system
The specific work process of middle unit, module, may be referred to the corresponding process in preceding method embodiment, will not be repeated here.
In the above-described embodiments, the description to each embodiment all emphasizes particularly on different fields, without detailed description or note in some embodiment
The part of load, may refer to the associated description of other embodiments.
Those of ordinary skill in the art are it is to be appreciated that the list of each example described with reference to the embodiments described herein
Member and algorithm steps, can be realized with the combination of electronic hardware or computer software and electronic hardware.These functions are actually
Performed with hardware or software mode, depending on the application-specific and design constraint of technical scheme.Professional and technical personnel
Described function can be realized using distinct methods to each specific application, but this realization is it is not considered that exceed
The scope of the present invention.
, can be with embodiment provided by the present invention, it should be understood that disclosed device/terminal device and method
Realize by another way.For example, device described above/terminal device embodiment is only schematical, for example, institute
The division of module or unit is stated, only a kind of division of logic function there can be other dividing mode, for example when actually realizing
Multiple units or component can combine or be desirably integrated into another system, or some features can be ignored, or not perform.Separately
A bit, shown or discussed coupling or direct-coupling or communication connection each other can be by some interfaces, device
Or INDIRECT COUPLING or the communication connection of unit, can be electrical, machinery or other forms.
The unit illustrated as separating component can be or may not be it is physically separate, it is aobvious as unit
The part shown can be or may not be physical location, you can with positioned at a place, or can also be distributed to multiple
On NE.Some or all of unit therein can be selected to realize the mesh of this embodiment scheme according to the actual needs
's.
In addition, each functional unit in each embodiment of the invention can be integrated in a processing unit, can also
That unit is individually physically present, can also two or more units it is integrated in a unit.Above-mentioned integrated list
Member can both be realized in the form of hardware, it would however also be possible to employ the form of SFU software functional unit is realized.
If the integrated module/unit realized using in the form of SFU software functional unit and as independent production marketing or
In use, can be stored in a computer read/write memory medium.Understood based on such, the present invention realizes above-mentioned implementation
All or part of flow in example method, can also instruct the hardware of correlation to complete, described meter by computer program
Calculation machine program can be stored in a computer-readable recording medium, and the computer program can be achieved when being executed by processor
The step of stating each embodiment of the method..Wherein, the computer program includes computer program code, the computer program
Code can be source code form, object identification code form, executable file or some intermediate forms etc..Computer-readable Jie
Matter can include：Can carry any entity or device of the computer program code, recording medium, USB flash disk, mobile hard disk,
Magnetic disc, CD, computer storage, read-only storage (ROM, Read-Only Memory), random access memory (RAM,
Random Access Memory), electric carrier signal, telecommunication signal and software distribution medium etc..It should be noted that described
The content that computer-readable medium is included can carry out appropriate increasing according to legislation in jurisdiction and the requirement of patent practice
Subtract, such as, in some jurisdictions, according to legislation and patent practice, computer-readable medium does not include electric carrier signal and electricity
Believe signal.
Embodiment described above is merely illustrative of the technical solution of the present invention, rather than its limitations；Although with reference to foregoing reality
Example is applied the present invention is described in detail, it will be understood by those within the art that：It still can be to foregoing each
Technical scheme described in embodiment is modified, or carries out equivalent substitution to which part technical characteristic；And these are changed
Or replace, the essence of appropriate technical solution is departed from the spirit and scope of various embodiments of the present invention technical scheme, all should
Within protection scope of the present invention.
Claims (13)
1. a kind of video previewing method, it is characterised in that the video previewing method includes：
Obtain the resolution ratio of the code stream of video preview passage；
According to the resolution ratio of the code stream of video preview passage, the decoding consumed resource corresponding to video preview passage is calculated；
When the code stream to video preview passage is decoded, judge whether the corresponding decoding consumed resource of the code stream is more than
System spare stock number；
If the corresponding consumed resource that decodes of the code stream is more than system spare stock number, current video preview passage is selected
Next code stream of code stream judged.
2. video previewing method according to claim 1, it is characterised in that the code stream according to video preview passage
Resolution ratio, the step of calculating the decoding consumed resource corresponding to video preview passage includes：
Decoding consumed resource according to corresponding to formula M=a*F+b calculates video preview passage, wherein M disappears for decoding resource
Consumption, a is the consumption radix related to decoding chip, and F is frame sign, and b is the supplementary structure institute unrelated with the frame sign of decoding
The resource of consumption.
3. video previewing method according to claim 1, it is characterised in that the code stream of the acquisition video preview passage
The step of resolution ratio is：
Parameter frame under the primary condition for the code stream for obtaining video preview passage, the resolution of code stream is read according to the parameter frame
Rate.
4. video previewing method according to claim 1, it is characterised in that judge the corresponding decoding of the code stream described
Before the step of whether consumed resource is more than system spare stock number, methods described also includes：
Judge whether the resolution ratio or system spare stock number of the code stream of the video preview passage change, in the event of change
Change, then judge whether the corresponding decoding consumed resource of the code stream is more than system spare stock number.
5. video previewing method according to claim 1, it is characterised in that the code stream according to video preview passage
Resolution ratio, the step of calculating the decoding consumed resource corresponding to video preview passage includes：
Resolution ratio belonging to the resolution ratio for the code stream for searching video preview passage is interval；
According to the interval corresponding relation with decoding consumed resource of default resolution ratio, the code stream of the video preview passage is searched
Resolution ratio corresponding to decoding consumed resource.
6. video previewing method according to claim 1, it is characterised in that the code stream according to video preview passage
Resolution ratio, the step of calculating the decoding consumed resource corresponding to video preview passage includes：
According to default resolution ratio and decoding consumed resource or the corresponding table of decoding resource consumption value, looked into the corresponding table
Look for the video preview passage code stream resolution ratio corresponding to decoding consumed resource or decoding resource consumption value.
7. video previewing method according to claim 1, it is characterised in that the video preview passage includes multiple passages,
The step of next code stream of the code stream of the selection current video preview passage is judged includes：
According to the priority orders of the code stream of multichannel set in advance, select each video preview passage code stream it is next
Priority code stream is played out.
8. video previewing method according to claim 1, it is characterised in that the judgement code stream is corresponding to decode money
The step of whether source consumption is more than system spare stock number includes：
The corresponding decoding consumed resource of code stream is converted into code stream consumption figures by conversion formula, and by the system spare
Stock number is converted to system spare resource value, then the decoding resource consumption value and system spare resource by conversion formula
The size of value, wherein, the conversion formula is：| (X+M/2)/M |=Y, X are stock number, and X is resource value, and M is conversion multiple.
9. a kind of video preview device, it is characterised in that the video preview device includes：
Resolution ratio acquiring unit, the resolution ratio of the code stream for obtaining video preview passage；
Consumed resource computing unit is decoded, for the resolution ratio of the code stream according to video preview passage, video preview is calculated and leads to
Decoding consumed resource corresponding to road；
Judging unit, for when the code stream to video preview passage is decoded, judging the corresponding decoding resource of the code stream
Whether consumption is more than system spare stock number；
Code stream selection unit, if being more than system spare stock number, root for the corresponding decoding consumed resource of the code stream
Next code stream according to the code stream of current video preview passage is judged.
10. video preview device according to claim 9, it is characterised in that the decoding consumed resource computing unit
For：
Decoding consumed resource according to corresponding to formula M=a*F+b calculates video preview passage, wherein M disappears for decoding resource
Consumption, a is the consumption radix related to decoding chip, and F is frame sign, and b is the supplementary structure institute unrelated with the frame sign of decoding
The resource of consumption.
11. video preview device according to claim 9, it is characterised in that the resolution ratio acquiring unit is used for：
Parameter frame under the primary condition for the code stream for obtaining video preview passage, the resolution of code stream is read according to the parameter frame
Rate.
12. a kind of video preview equipment, including memory, processor and it is stored in the memory and can be in the processing
The computer program run on device, it is characterised in that realize such as claim 1 described in the computing device during computer program
The step of to any one of 5 video previewing method.
13. a kind of computer-readable recording medium, the computer-readable recording medium storage has computer program, its feature exists
In the step of realization video previewing method as described in any one of claim 1 to 5 when the computer program is executed by processor
Suddenly.
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