CN106817588A - Transcoding control method and device, net cast method and system - Google Patents
Transcoding control method and device, net cast method and system Download PDFInfo
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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
- H04N21/21—Server components or server architectures
- H04N21/218—Source of audio or video content, e.g. local disk arrays
- H04N21/2187—Live feed
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N17/00—Diagnosis, testing or measuring for television systems or their details
- H04N17/02—Diagnosis, testing or measuring for television systems or their details for colour television signals
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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
- H04N21/234309—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 transcoding between formats or standards, e.g. from MPEG-2 to MPEG-4 or from Quicktime to Realvideo
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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]
- H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
- H04N21/83—Generation or processing of protective or descriptive data associated with content; Content structuring
- H04N21/845—Structuring of content, e.g. decomposing content into time segments
- H04N21/8456—Structuring of content, e.g. decomposing content into time segments by decomposing the content in the time domain, e.g. in time segments
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Abstract
The invention discloses a kind of transcoding control method and device, net cast method and system, belong to internet stream media technical field.Wherein, transcoding control method comprises the following steps：Video frame rate to the current detection time fragment of video flowing is detected, and draws current video frame per second, and sets the current video frame per second for transcoding frame per second, and transcoding is carried out to the video flowing according to the transcoding frame per second；According to the current video frame per second and video frame rate before, the next detection time fragment of the video flowing is determined；Video frame rate to next detection time fragment described in the video flowing is detected, and draws next video frame rate, and the transcoding frame per second is updated into next video frame rate, and transcoding is carried out to the video flowing according to the transcoding frame per second after renewal.The present invention is by the real-time detection to video stream frame rate, it is ensured that the accuracy of video stream transcoding process transit code frame per second.
Description
Technical field
It is straight the present invention relates to internet stream media technical field, more particularly to a kind of transcoding control method and device, video
Broadcasting method and system.
Background technology
As the development and China's bandwidth of Internet technology are constantly raised speed, the leading content of internet is from word, picture
It is leading content progressively to develop into audio frequency and video.The explosion of mobile Internet in recent years so that internet is with people's
It is more close that life is contacted, increasingly, it is desired that obtaining multimedia messages from internet to meet the various demands of oneself.
Then large quantities of audio-video frequency content providers have been expedited the emergence of, and has greatly facilitated content distributing network (Content Delivery
Network, CDN) industry development.Simple audio frequency and video no longer meet the demand of people, and people's demand is either in PC
In the case that end or in various mobile terminals, either network quality are excellent or in the case of network quality difference, all
The high-quality audio-video frequency content of high-quality can be enjoyed.
For internet stream media field, due to there is big and small many video source providers, these video sources are carried
The accuracy of the audio frequency and video form of offer, the frame per second information of such as video are not provided for business.Meanwhile, in video code conversion process
Middle video source is also possible in real time change the frame per second information of video flowing.This is resulted in can not be according to accurate video frame rate
Transcoding is carried out to video flowing, can be caused according to inaccurate frame per second transcoding：
1. the code check after transcoding is uncontrollable, and the excessive frame per second of mistake sets and the code check after transcoding may be caused excessive,
Cause bandwidth waste.
2. frame per second during transcoding is inconsistent with video true frame per second before transcoding, and the frame per second in transcoding process according to mistake is entered
Row video code conversion, frame can be taken out to video or replicate the operation of some frames, influence the result of broadcast of video.
The content of the invention
In order to solve problem of the prior art, a kind of transcoding control method and device, video are the embodiment of the invention provides
Live broadcasting method and system.The technical scheme is as follows：
On the one hand, there is provided a kind of transcoding control method, comprise the following steps：
Video frame rate to the current detection time fragment of video flowing is detected, and draws current video frame per second, and set institute
Current video frame per second is stated for transcoding frame per second, transcoding is carried out to the video flowing according to the transcoding frame per second；
According to the current video frame per second and video frame rate before, the next detection time fragment of the video flowing is determined；
Video frame rate to next detection time fragment described in the video flowing is detected, and draws next video frame rate,
And the transcoding frame per second is updated to next video frame rate, the video is flowed into according to the transcoding frame per second after renewal
Row transcoding.
Further, the video frame rate to the current detection time fragment of video flowing is detected, and draws current video
Frame per second, and the current video frame per second is set for transcoding frame per second, transcoding is carried out to the video flowing according to the transcoding frame per second
Step is specifically included：
The video frame rate of the current detection time fragment is detected according to frame per second probe algorithm, the current video frame is drawn
Rate；
The current video frame per second is set to transcoding frame per second, according to the transcoding frame per second to the current detection time piece
Section and the current detection time fragment to the video flowing between next detection time fragment carry out transcoding.
Further, it is described according to the current video frame per second and video frame rate before, determine the next spy of the video flowing
The step of surveying time slice specifically includes：
Calculate the difference of the current video frame per second and the video frame rate before；
If the difference shortens the current detection time fragment and next detection time more than setting difference
The time interval of fragment；
If the difference extends the current detection time fragment and next detection less than or equal to setting difference
The time interval of time slice.
Further, the video frame rate to next detection time fragment described in the video flowing is detected, and is drawn
Next video frame rate, and the transcoding frame per second is updated to next video frame rate, according to the transcoding frame per second after renewal
The step of carrying out transcoding to the video flowing specifically includes：
The video frame rate of next detection time fragment is detected according to the frame per second probe algorithm, described next regard is drawn
Frequency frame per second；
The transcoding frame per second is updated to next video frame rate, according to the transcoding frame per second after renewal under described
One detection time fragment and next detection time fragment to the video flowing before detecting again carry out transcoding.
, there is provided a kind of net cast method, including described transcoding control method on the other hand.
A kind of another further aspect, there is provided transcoding control device, including：
First detecting module, detects for the video frame rate to the current detection time fragment of video flowing, draws current
Video frame rate, and the current video frame per second is set for transcoding frame per second, the video flowing is turned according to the transcoding frame per second
Code；
Control module, for according to the current video frame per second and video frame rate before, determining the next spy of the video flowing
Survey time slice；
Second detecting module, detects for the video frame rate to next detection time fragment described in the video flowing,
Next video frame rate is drawn, and the transcoding frame per second is updated to next video frame rate, according to the transcoding after renewal
Frame per second carries out transcoding to the video flowing.
Further, first detecting module includes that the first detection submodule and first sets submodule；
The first detection submodule, the video for detecting the current detection time fragment according to frame per second probe algorithm
Frame per second, draws the current video frame per second；
Described first sets submodule, for the current video frame per second to be set into transcoding frame per second, according to the transcoding
Frame per second is to the current detection time fragment and the current detection time fragment between next detection time fragment
The video flowing carries out transcoding.
Further, the control module includes calculating sub module and judging submodule；
The calculating sub module, the difference for calculating the current video frame per second and the video frame rate before；
The judging submodule, for judging：
If the difference shortens the current detection time fragment and next detection time more than setting difference
The time interval of fragment；Or
If the difference extends the current detection time fragment and next detection less than or equal to setting difference
The time interval of time slice.
Further, second detecting module includes that the second detection submodule and second sets submodule；
The second detection submodule, for detecting next detection time fragment according to the frame per second probe algorithm
Video frame rate, draws next video frame rate；
Described second sets submodule, for the transcoding frame per second to be updated into next video frame rate, according to renewal
Institute of the transcoding frame per second afterwards to next detection time fragment and next detection time fragment to before detecting again
Stating video flowing carries out transcoding.
A kind of another further aspect, there is provided video living transmission system, including described transcoding control device.
The beneficial effect that technical scheme provided in an embodiment of the present invention is brought is：
By the real-time detection to video stream frame rate, it is ensured that the accuracy of video stream transcoding process transit code frame per second, keep away
Bandwidth waste caused by fault-avoidance excessive frame per second by mistake, and the too small frame per second of mistake causes the decline of image quality, it is ensured that
The uniformity of image quality and code check before and after transcoding.And then ensure that the quality and effect of video stream transcoding.
Brief description of the drawings
Technical scheme in order to illustrate more clearly the embodiments of the present invention, below will be to that will make needed for embodiment description
Accompanying drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the present invention, for
For those of ordinary skill in the art, on the premise of not paying creative work, other can also be obtained according to these accompanying drawings
Accompanying drawing.
Fig. 1 is the transcoding control method flow chart that the embodiment of the present invention one is provided；
Fig. 2 is the transcoding control method flow chart that the embodiment of the present invention one is provided；
Fig. 3 is the transcoding control method flow chart that the embodiment of the present invention one is provided；
Fig. 4 is the transcoding control method flow chart that the embodiment of the present invention one is provided；
Fig. 5 is the transcoding flow chart that the embodiment of the present invention one is provided；
Fig. 6 is the structural representation of the transcoding control device that the embodiment of the present invention two is provided；
Fig. 7 is the structural representation of the first detecting module that the embodiment of the present invention two is provided；
Fig. 8 is the structural representation of the control module that the embodiment of the present invention two is provided；
Fig. 9 is the structural representation of the second detecting module that the embodiment of the present invention two is provided.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing to embodiment party of the present invention
Formula is described in further detail.
Embodiment one
A kind of transcoding control method is the embodiment of the invention provides, referring to Fig. 1, is comprised the following steps：
S101：Video frame rate to the current detection time fragment of video flowing is detected, and draws current video frame per second, and set
The current video frame per second is put for transcoding frame per second, transcoding is carried out to the video flowing according to the transcoding frame per second.
In live scene, video source provider provides video flowing and determines the form of provided video flowing, due to these
The form of video source is different, so that carry out real-time transcoding to video source, then the video flowing output after transcoding is processed
To user terminal.In due to transcoding process, because of different reasons, such as the video frame rate information entrained by video flowing it is inaccurate or
Video frame rate information is not carried, the video frame rate that will cause directly to parse video flowing acquisition is inaccurate, and then cause transcoding not just
Video often or after transcoding cannot normally show.
This method carries out real-time detection by the video frame rate to video flowing, and the video frame rate learnt according to real-time detection
Transcoding is carried out to video flowing, it is ensured that transcoded quality.
In the present embodiment, the video frame rate to the current detection time fragment of video flowing is detected, and is drawn current
Video frame rate, and the current video frame per second is set for transcoding frame per second, the video flowing is turned according to the transcoding frame per second
The step of code, S101 specifically included the sub-steps of S1011-S1012 two, as shown in Figure 2.
S1011：The video frame rate of the current detection time fragment is detected according to frame per second probe algorithm, is drawn described current
Video frame rate.
Frame per second (Frame rate) is that, for measuring measuring for display frame number, its units of measurement is display frame number per second
(Frames per Second, FPS), such as one second 30 frames of display, then frame per second is 30FPS.For the detection of frame per second, its spy
Method of determining and calculating is varied, and the computation complexity of the precision then algorithm more high of detection is also higher, thus considers essence when selecting
Spend with computation complexity to select different probe algorithms.
Due in live scene, to consider time delay, the treatment to video flowing is extremely rapid, while it is also contemplated that
To equipment performance, thus, the detection time fragment of selection is all very short, is chosen in the range of hundreds of milliseconds, although detection
Time slice is all very short, but the detection time fragment length chosen determines the accurate journey to the detection of this time slice frame per second
Degree, because data are more in detection time fragment more long, thus the result of detection for drawing is more accurate.
In the present embodiment, receiving and processing the initial of video flowing, above-mentioned current detection time fragment is being first choosing
The detection time fragment for taking, video frame rate detection is carried out by frame per second probe algorithm to the detection time fragment, is drawn and is worked as forward sight
Frequency frame per second.
S1012：The current video frame per second is set to transcoding frame per second, according to the transcoding frame per second to the current detection
Time slice and the current detection time fragment to the video flowing between next detection time fragment carry out transcoding.
In the present embodiment, the current video frame per second for detecting using as the transcoding frame per second of transcoding, by the way that forward sight will be deserved
Frequency frame per second is set into transcoding device, for example, set in the context parameters of decoder and the context parameters of encoder, is turned
Code device according to transcoding frame per second, that is, the current video frame per second for detecting, to current detection time fragment, and current detection time
Fragment to the video flowing between next detection time fragment carries out transcoding.
As can be seen that the current video frame per second for detecting is limited, it is only used as regarding in special time fragment
The transcoding frame per second of frequency stream, because, the detection process to video flowing is real-time, by the frame of video of real-time detection video flowing
Rate, overcome well because unstable networks cause video dither flow and caused by the problem that changes of video frame rate.
S102：According to the current video frame per second and video frame rate before, the next detection time piece of the video flowing is determined
Section.
In the present embodiment, can also be detected next time, until transcoding process terminates after the completion of detection every time.Turning
During code, detection video frame rate meeting occupying system resources, if frequently carrying out detection can be significantly greatly increased system burden, thus
Appropriate setting is carried out to the opportunity for detecting, balance transcoded quality and systematic function.
In the present embodiment, it is described according to the current video frame per second and video frame rate before, under determining the video flowing
The step of one detection time fragment, S102 specifically included the sub-steps of S1021-S1022 two, as shown in Figure 3.
S1021：Calculate the difference of the current video frame per second and the video frame rate before.
At the video stream transcoding initial stage, current video frame per second is to detect the video frame rate for drawing for the first time, thus in the absence of it
Preceding video frame rate, in this case, sets current detection time fragment and next detection time fragment in advance.
When second video frame rate detection is completed, current video frame per second is the video frame rate that second detection draws, now,
Video frame rate is to detect the video frame rate for drawing for the first time before.
When the detection of third time video frame rate is completed, current video frame per second is to detect the video frame rate for drawing for the third time, now,
Video frame rate has various setting means before.
A kind of setting means of video frame rate is that video frame rate is the video frame rate that second detection draws before before,
Video frame rate is the preceding video frame rate for once detecting out of current detection before i.e., under this setting means, frame of video before
Rate need not count the video frame rate that all previous detection draws, can in real time reflect the frame per second situation of change of current video stream.
Another setting means of video frame rate is that video frame rate is comprehensively to detect the video for drawing for the first time before before
Frame per second and detect the video frame rate for drawing for the second time and the reference video frame per second for drawing, i.e., before video frame rate be comprehensive currently spy
The video frame rate of all previous detection before surveying and the reference video frame per second that draws, for example, detect to first time probe value and second
Value setting weight, it is assumed that the weight of first time probe value is 40%, and second weight of probe value is 60%, according to weight calculation
Mode calculates reference video frame per second.Under this setting means, video frame rate with reference to all previous detection data before, closer
The actual frame per second of video flowing.
In the case where video frame rate detection twice had been carried out, by calculating current video frame per second with frame of video before
The difference of rate, determines next detection time fragment.
S1022：If the difference shortens the current detection time fragment and next spy more than setting difference
Survey the time interval of time slice；If the difference extends the current detection time fragment less than or equal to setting difference
With the time interval of next detection time fragment.
In the present embodiment, current video frame per second is smaller with the difference of video frame rate before, illustrates the steady of current video stream
Determine that degree is better, applicable time of the current video frame per second as transcoding frame per second can be extended, at this time, it may be necessary to proper extension is carried out down
The time interval of one detection.If current video frame per second is bigger with the difference of video frame rate before, the steady of current video stream is illustrated
Determine that degree is poor, at this time, it may be necessary to appropriate shorten the time interval for carrying out next detection, increase detection times, obtained according to detection
Video frame rate as transcoding frame per second.
It should be noted that above-mentioned setting difference reflects the acceptable degree of transcoding rear video stream degree of stability, for example when
When setting difference is smaller, the video flowing degree of stability for obtaining is higher, is now subjected to degree higher；When setting difference and being larger, obtain
The video flowing degree of stability for arriving is relatively low, is now subjected to degree relatively low.
S103：Video frame rate to next detection time fragment described in the video flowing is detected, and draws next video
Frame per second, and the transcoding frame per second is updated to next video frame rate, regarded to described according to the transcoding frame per second after renewal
Frequency stream carries out transcoding.
Because the detection process of video frame rate is ongoing, so that constantly adjusting transcoding frame per second, Jin Ergeng
Transcoding is carried out to video flowing well.
In the present embodiment, the video frame rate to next detection time fragment described in the video flowing is detected,
Next video frame rate is drawn, and the transcoding frame per second is updated to next video frame rate, according to the transcoding after renewal
The step of frame per second carries out transcoding to video flowing S103 specifically includes the sub-steps of S1031-S1032 two, as shown in Figure 4.
S1031：The video frame rate of next detection time fragment is detected according to the frame per second probe algorithm, is drawn described
Next video frame rate.
In the present embodiment, the frame per second probe algorithm for being used in whole transcoding process is identical, is detected according to frame per second and calculated
Method detects the video frame rate of next detection time fragment, draws next video frame rate.It should be noted that when carrying out next detection
Between fragment video frame rate detect when, its process is detected as step S101 to next detection time fragment
When, next detection time fragment is current time fragment.When current detection time fragment in this method is with next detection
Between fragment name, its name purpose be in order to distinguish frame per second detection tandem.
S1032：The transcoding frame per second is updated to next video frame rate, according to the transcoding frame per second pair after renewal
Next detection time fragment and next detection time fragment to the video flowing before detecting again carry out transcoding.
After next video frame rate is detected, transcoding frame per second before is stopped using, and transcoding frame per second is updated into next regarding
Frequency frame per second, according to the transcoding frame per second after renewal, to next detection time fragment and next detection time fragment to detecting again
Video flowing in preceding time interval carries out transcoding.
It should be noted that current video frame rate and video frame rate before together decide on video detection next time when
Machine, i.e. the video frame rate detection circulation to video flowing are carried out, until video stream transcoding terminates.
By the real-time detection to video stream frame rate, it is ensured that the accuracy of video stream transcoding process transit code frame per second, keep away
Bandwidth waste caused by fault-avoidance excessive frame per second by mistake, and the too small frame per second of mistake causes the decline of image quality, it is ensured that
The uniformity of image quality and code check before and after transcoding.And then ensure that the quality and effect of video stream transcoding.
As can be seen that the transcoding control method described in the present embodiment is the transcoding frame per second by real-time detection come to transcoding mistake
Journey is controlled.Referring to Fig. 5, Fig. 5 is shown using the transcoding particular flow sheet of this transcoding control method.
First, the audio/video flow of input is read, and obtains the encapsulation format of audio/video flow, audio frequency and video parameter and encoding and decoding
Parameter information.
Afterwards, audio/video flow is decapsulated, separates audio, video data.
For video data, after the transcoding control method of the present embodiment obtains video frame rate, video frame rate is set
Into decoder context parameter and encoder context parameters, and then decoding video data, to the treatment of video filter, and encode
Video data after filter treatment.
For voice data, decoding audio data to the treatment of voice data filter, and encodes the audio number after filter treatment
According to.
Finally, audio, video data is encapsulated according to output file type, the audio frequency and video after output transcoding.
Shown in Fig. 5 is that the transcoding control method carries out a kind of real of transcoding treatment during net cast to video flowing
Mode is applied, not as the restriction of the other embodiment to the transcoding control method.
Embodiment two
Referring to Fig. 6, a kind of transcoding control device is the embodiment of the invention provides, turning of providing in embodiment one can be provided
Code control method, including：
First detecting module 210, detects for the video frame rate to the current detection time fragment of video flowing, draws and works as
Preceding video frame rate, and current video frame per second is set for transcoding frame per second, transcoding is carried out to video flowing according to transcoding frame per second；
Control module 220, for according to current video frame per second and video frame rate before, determining the next detection time of video flowing
Fragment；
Second detecting module 230, detects for the video frame rate to the next detection time fragment of video flowing, draws down
One video frame rate, and transcoding frame per second is updated to next video frame rate, video flowing is turned according to the transcoding frame per second after renewal
Code.
In the present embodiment, above-mentioned transcoding control device is when the video frame rate of video flowing is detected, in addition it is also necessary to other devices
Cooperation, such as acquisition device of video flowing encapsulation mode, decapsulation processing unit, encoder, decoder etc., these devices are complete
Into the transcoding flow of existing video flowing, the transcoding control device is a spy of the middle addition on the basis of existing transcoding flow
Survey the device of video flowing video frame rate.
Referring to Fig. 7, in the present embodiment, the first detecting module 210 includes that the first detection submodule 211 and first sets son
Module 212.
First detection submodule 211, the video frame rate for detecting current detection time fragment according to frame per second probe algorithm,
Draw current video frame per second.
First sets submodule 212, for current video frame per second to be set into transcoding frame per second, according to transcoding frame per second to current
Detection time fragment and current detection time fragment to the video flowing between next detection time fragment carry out transcoding.
Referring to Fig. 8, in the present embodiment, control module 220 includes calculating sub module 221 and judging submodule 222.
Calculating sub module 221, the difference for calculating current video frame per second and video frame rate before.
Judging submodule 222, for judging：
If difference is more than setting difference, between shortening the time of current detection time fragment and next detection time fragment
Every；Or
If difference less than or equal to setting difference, extend current detection time fragment and next detection time fragment when
Between be spaced.
Referring to Fig. 9, in the present embodiment, the second detecting module 230 includes that the second detection submodule 231 and second sets son
Module 232.
Second detection submodule 231, the video frame rate for detecting next detection time fragment according to frame per second probe algorithm,
Draw next video frame rate.
Second sets submodule 232, for transcoding frame per second to be updated into next video frame rate, according to the transcoding frame after renewal
Rate carries out transcoding to next detection time fragment and next detection time fragment to the video flowing before detecting again.
Embodiment three
A kind of net cast method is the embodiment of the invention provides, including the transcoding control method provided in embodiment one.
In existing net cast method, the transcoding to video flowing is that the video format provided by video source provider is believed
Breath, including video resolution, code check, frame per second, in the transcoding process to video flowing, if directly believed according to above-mentioned video format
Breath carries out transcoding, when above-mentioned video format information is inaccurate, transcoded quality can be caused not good, influences live effect.
In the present embodiment, Fig. 5 is participated in again, during live, first, reads the live audio/video flow of input, and
Obtain encapsulation format, audio frequency and video parameter and the codec parameters information of audio/video flow.
Afterwards, audio/video flow is decapsulated, separates audio, video data.
For video data, after the transcoding control method of embodiment one obtains video frame rate, video frame rate is set
Into decoder context parameter and encoder context parameters, and then decoding video data, to the treatment of video filter, and encode
Video data after filter treatment.
For voice data, decoding audio data to the treatment of voice data filter, and encodes the audio number after filter treatment
According to.
Finally, audio, video data is encapsulated according to output file type, the audio frequency and video after transcoding is exported live to receiving
Various receiving terminals, such as user mobile phone, PC etc..
Implement the transcoding control method that embodiment one is provided by the live broadcasting method, obtained video flowing and accurately regarded
Frequency frame per second, preferably improves live effect.
Example IV
The transcoding control device provided in a kind of video living transmission system, including embodiment two is provided.
In the present embodiment, the video living transmission system includes：
Encapsulation mode acquisition device, for obtaining encapsulation format information, audio frequency and video parameter from audio/video flow and compiling solution
Code parameter information.
Decapsulation processing unit, audio frequency and video are separated for decapsulating.
Transcoding control device, for detecting video frame rate.
Device for decoding audio and video, for video to be decoded as into yuv data, audio decoder is PCM data.
Filter processing unit, for the filter treatment of audio frequency and video.
Audio/video coding device, for filter to be processed after audio, video data encoded.
Encapsulation process device, is packaged for the encapsulation format by the audio, video data after coding as requested.
The video living transmission system exports to receiving live various receiving terminals the audio frequency and video after encapsulation process.
The embodiments of the present invention are for illustration only, and the quality of embodiment is not represented.
Device embodiment described above is only schematical, wherein the unit illustrated as separating component can
To be or may not be physically separate, the part shown as unit can be or may not be physics list
Unit, you can with positioned at a place, or can also be distributed on multiple NEs.It can according to the actual needs be selected
In some or all of module realize the purpose of this embodiment scheme.Those of ordinary skill in the art are not paying creativeness
Work in the case of, you can to understand and implement.
Through the above description of the embodiments, those skilled in the art can be understood that each implementation method can
Realized by the mode of software plus required general hardware platform, naturally it is also possible to by hardware.Based on such understanding, on
Stating the part that technical scheme substantially contributes to prior art in other words can be embodied in the form of software product, should
Computer software product can be stored in a computer-readable storage medium, such as ROM/RAM, magnetic disc, CD, including some fingers
Order is used to so that a computer equipment (can be personal computer, server, or network equipment etc.) performs each implementation
Method described in some parts of example or embodiment.
The foregoing is only presently preferred embodiments of the present invention, be not intended to limit the invention, it is all it is of the invention spirit and
Within principle, any modification, equivalent substitution and improvements made etc. should be included within the scope of the present invention.
Claims (10)
1. a kind of transcoding control method, it is characterised in that comprise the following steps：
Video frame rate to the current detection time fragment of video flowing is detected, and draws current video frame per second, and set described working as
Preceding video frame rate is transcoding frame per second, and transcoding is carried out to the video flowing according to the transcoding frame per second；
According to the current video frame per second and video frame rate before, the next detection time fragment of the video flowing is determined；
Video frame rate to next detection time fragment described in the video flowing is detected, and draws next video frame rate, and will
The transcoding frame per second is updated to next video frame rate, and the video flowing is turned according to the transcoding frame per second after renewal
Code.
2. transcoding control method according to claim 1, it is characterised in that described to the current detection time fragment of video flowing
Video frame rate detected, current video frame per second is drawn, and the current video frame per second is set for transcoding frame per second, according to described
The step of transcoding frame per second carries out transcoding to the video flowing specifically includes：
The video frame rate of the current detection time fragment is detected according to frame per second probe algorithm, the current video frame per second is drawn；
The current video frame per second is set to transcoding frame per second, according to the transcoding frame per second to the current detection time fragment and
The current detection time fragment to the video flowing between next detection time fragment carries out transcoding.
3. transcoding control method according to claim 2, it is characterised in that it is described according to the current video frame per second therewith
Preceding video frame rate, specifically includes the step of determine the video flowing next detection time fragment：
Calculate the difference of the current video frame per second and the video frame rate before；
If the difference shortens the current detection time fragment with next detection time fragment more than setting difference
Time interval；
If the difference extends the current detection time fragment and next detection time less than or equal to setting difference
The time interval of fragment.
4. transcoding control method according to claim 3, it is characterised in that described to next detection described in the video flowing
The video frame rate of time slice is detected, and draws next video frame rate, and the transcoding frame per second is updated into described next regard
Frequency frame per second, specifically includes the step of carry out transcoding to the video flowing according to the transcoding frame per second after renewal：
The video frame rate of next detection time fragment is detected according to the frame per second probe algorithm, next frame of video is drawn
Rate；
The transcoding frame per second is updated to next video frame rate, according to the transcoding frame per second after renewal to next spy
Surveying time slice and next detection time fragment to the video flowing before detecting again carries out transcoding.
5. a kind of net cast method, it is characterised in that including the transcoding control method described in Claims 1-4 any one.
6. a kind of transcoding control device, it is characterised in that including：
First detecting module, detects for the video frame rate to the current detection time fragment of video flowing, draws current video
Frame per second, and the current video frame per second is set for transcoding frame per second, transcoding is carried out to the video flowing according to the transcoding frame per second；
Control module, for according to the current video frame per second and video frame rate before, determining during the next detection of the video flowing
Between fragment；
Second detecting module, detects for the video frame rate to next detection time fragment described in the video flowing, draws
Next video frame rate, and the transcoding frame per second is updated to next video frame rate, according to the transcoding frame per second after renewal
Transcoding is carried out to the video flowing.
7. transcoding control device according to claim 6, it is characterised in that first detecting module includes the first detection
Submodule and first sets submodule；
The first detection submodule, the frame of video for detecting the current detection time fragment according to frame per second probe algorithm
Rate, draws the current video frame per second；
Described first sets submodule, for the current video frame per second to be set into transcoding frame per second, according to the transcoding frame per second
To the current detection time fragment and the current detection time fragment to described between next detection time fragment
Video flowing carries out transcoding.
8. transcoding control device according to claim 7, it is characterised in that the control module include calculating sub module and
Judging submodule；
The calculating sub module, the difference for calculating the current video frame per second and the video frame rate before；
The judging submodule, for judging：
If the difference shortens the current detection time fragment with next detection time fragment more than setting difference
Time interval；Or
If the difference extends the current detection time fragment and next detection time less than or equal to setting difference
The time interval of fragment.
9. transcoding control device according to claim 8, it is characterised in that second detecting module includes the second detection
Submodule and second sets submodule；
The second detection submodule, the video for detecting next detection time fragment according to the frame per second probe algorithm
Frame per second, draws next video frame rate；
Described second sets submodule, for the transcoding frame per second to be updated into next video frame rate, after renewal
The transcoding frame per second to next detection time fragment and next detection time fragment to before detecting again described in regard
Frequency stream carries out transcoding.
10. a kind of video living transmission system, it is characterised in that control dress including the transcoding described in claim 6 to 9 any one
Put.
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