CN104410903A - Method and system for transcoding video based on mobile terminal - Google Patents
Method and system for transcoding video based on mobile terminal Download PDFInfo
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- CN104410903A CN104410903A CN201410826527.XA CN201410826527A CN104410903A CN 104410903 A CN104410903 A CN 104410903A CN 201410826527 A CN201410826527 A CN 201410826527A CN 104410903 A CN104410903 A CN 104410903A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs
- H04N21/44004—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 video buffer management, e.g. video decoder buffer or video display buffer
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/41—Structure of client; Structure of client peripherals
- H04N21/414—Specialised client platforms, e.g. receiver in car or embedded in a mobile appliance
- H04N21/41407—Specialised client platforms, e.g. receiver in car or embedded in a mobile appliance embedded in a portable device, e.g. video client on a mobile phone, PDA, laptop
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, 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
Abstract
The invention discloses a method and system for transcoding a video based on a mobile terminal, and belongs to the technical field of video transcoding. The method comprises the following steps: receiving a video request from a mobile terminal; obtaining the supportable resolution ratio of the mobile terminal, and starting transcoding a video at different resolution ratios by at least two transcoding nodes; selecting one transcoding node to obtain a video code stream, and transmitting the video code stream to the mobile terminal; and adaptively adjusting the transcoding node according to a loading state of the mobile terminal. According to the embodiment of the invention, the same video is transcoded at different resolution ratios by multiple transcoding nodes, the loading state of the mobile terminal is detected in real time, and the transcoding nodes are dynamically selected according to the loading state of the mobile terminal so that the video resolution ratio is dynamically adjusted, and the optimal effect of video playing is obtained. The resolution ratio of the video can be quickly and dynamically adjusted and a user is not influenced to watch the video, so that the user watching experience is improved.
Description
Technical field
The present invention relates to Video Transcoding Technology field, particularly relate to a kind of video transcoding method based on mobile terminal and system.
Background technology
Mobile terminal no longer solely meets the communication need of people, and along with the introducing of intelligent terminal (smart mobile phone, IPAD), more software and application program become the necessary article in people's life.Have a meal, see a film and even do shopping and can have been come by intelligent terminal.Mobile terminal is introduced the trend that video monitoring also becomes a certainty, but video code conversion system at present, do not have well to process for mobile terminal video transcoding resolution, a usual road mobile terminal video only has a transcoding node to be responsible for transcoding, if the video code flow of this transcoding node is larger, mobile terminal cpu load then can be caused too high, produce to play to block and time or blank screen phenomenon.If obtain the video code flow of applicable resolution, can only stop watching video, reset the resolution of transcoded video code stream, obtain and be applicable to video code flow, but cause again the video-see weak effect of user like this, Consumer's Experience is not good.
Summary of the invention
In view of this, the technical problem to be solved in the present invention is to provide a kind of video transcoding method based on mobile terminal and system, during to solve based on mobile terminal viewing video, the broadcasting card of the improper generation of video code conversion resolution pauses or the technical problem of blank screen, carries out adjusting fast, dynamically not affecting on the basis seeing user's viewing experience to the resolution of video.
It is as follows that the present invention solves the problems of the technologies described above adopted technical scheme:
Based on a video transcoding method for mobile terminal, be applied to scheduler, the method comprises the following steps:
Judge whether to need the video resolution to mobile terminal to adjust according to the current loading condition of described mobile terminal;
When needs adjust, the transcoding node corresponding to target video resolution sends request, and the video code flow of acquisition is sent to mobile terminal.
Preferably, judge whether to need to adjust video resolution to comprise further according to the current loading condition of mobile terminal:
When mobile terminal is in idle condition, judge whether current resolution is the highest further, if not the highest, be then judged as needing to the higher resolution adjustment of the resolution of current video image; When mobile terminal is in busy condition, judge whether current video resolution is minimum further, if not minimum, be then judged as needing to the lower resolution adjustment of the resolution of current video image; When mobile terminal is in general state, be judged as not needing adjustment.
Preferably, send taking a step forward of request to the transcoding node that target video resolution is corresponding to comprise:
The current transcoding way obtaining transcoding node and the maximum transcoding way that can support;
When the transcoding way that transcoding node is current reaches the maximum transcoding way that can support, increase new transcoding node and carry out target video resolution transcoding.
Preferably, the current transcoding way obtaining transcoding node and the maximum transcoding way that can support comprise further:
Scheduler sends the request of maximum transcoding way obtaining current transcoding way and can support to transcoding node;
Transcoding node obtains current cpu busy percentage and internal memory use amount, uses percentage to estimate the maximum transcoding way self can supported according to cpu busy percentage and internal memory;
Transcoding way current for transcoding node and the maximum transcoding way valuation that can support are reported scheduler.
Preferably, select a transcoding node to obtain video code flow to comprise further:
Random selecting transcoding node obtains video code flow;
Or, select the transcoding node that resolution is the highest to obtain video code flow.
Preferably, start at least two transcoding nodes and carry out video in the transcoding of different resolution, the highest resolution of transcoding node is no more than the supported resolution of mobile terminal.
According to another aspect of the present invention, a kind of video code conversion system based on mobile terminal provided, be applied to scheduler, this system comprises with lower module:
Receiver module, for the video request of mobile terminal receive;
Start module, obtain the supported resolution of mobile terminal, and start at least two transcoding nodes carry out different resolution transcoding to video;
Initialization module, for selecting a transcoding node to obtain video code flow, and is sent to mobile terminal;
Adjusting module, for the load condition self-adaptative adjustment transcoding node according to mobile terminal.
Preferably, adjusting module comprises further:
First acquiring unit, for obtaining the current loading condition of mobile terminal;
First judging unit, needs to adjust video resolution for judging whether according to the current loading condition of mobile terminal;
Transmission unit, for when needs adjust, the transcoding node corresponding to target video resolution sends request, and the video code flow of acquisition is sent to mobile terminal.
Preferably, adjusting module also comprises second acquisition unit, the second judging unit and expanding element, wherein:
Second acquisition unit, for the current transcoding way obtaining transcoding node and the maximum transcoding way that can support;
Whether the second judging unit, reach the maximum transcoding way that can support for the transcoding way current according to transcoding node;
Expanding element, when reaching for the transcoding way current when transcoding node the maximum transcoding way that can support, increases new transcoding node and carries out target video resolution transcoding.
The video transcoding method based on mobile terminal of the embodiment of the present invention and system, by the transcoding adopting multiple transcoding node same video to be carried out to different resolution simultaneously, and detect the load condition of mobile terminal in real time, according to the load condition of mobile terminal, Dynamic Selection transcoding node, thus dynamic regulating video resolution, obtain the optimum efficiency of video playback.The present invention by detecting the real-time status of mobile terminal, and from the demand that dynamic response user video is watched, when can watch video when not affecting user, adjusts video resolution fast, dynamically, improves user's viewing experience.
Accompanying drawing explanation
The flow chart of a kind of video transcoding method based on mobile terminal that Fig. 1 provides for the embodiment of the present invention;
The flow chart of a kind of transcoding knot adjustment method that Fig. 2 provides for the preferred embodiment of the present invention;
The function structure chart of the video code conversion system based on mobile terminal that Fig. 3 provides for the embodiment of the present invention.
The structure chart of the adjusting module that Fig. 4 provides for the preferred embodiment of the present invention.
Embodiment
In order to make technical problem to be solved by this invention, technical scheme and beneficial effect clearly, understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Embodiment one
As shown in Figure 1, a kind of video transcoding method based on mobile terminal that the embodiment of the present invention provides, be applied to scheduler, the method comprises the following steps:
The video request of S10, mobile terminal receive.
Particularly, user sends the request of viewing video by the button of mobile terminal or man-machine interface to scheduler.
S20, the supported resolution of acquisition mobile terminal, and start at least two transcoding nodes carry out different resolution transcoding to video.
Particularly, scheduler obtains the supported resolution of mobile terminal itself, and start multiple transcoding node carries out different resolution transcoding to video simultaneously, wherein, start at least two transcoding nodes to carry out video in the transcoding of different resolution, the highest resolution of transcoding node is no more than the supported resolution of mobile terminal.Common resolution has three kinds: CIF (low resolution), HALFD1 (resolution) and D1 (high-resolution).Namely when mobile terminal starts to watch video, scheduler can notify 3 transcoding nodes, adopt the video of CIF (352 × 288), HALFD1 (720 × 288), D1 (720 × 576) three kinds of different resolutions to carry out transcoding to same image respectively, the code stream size after its transcoding is also just different.
S30, selection transcoding node obtain video code flow, and are sent to mobile terminal.
Particularly, scheduler can from the transcoding node of several different resolution, random selecting video code flow is sent to mobile terminal, also the highest transcoding node of resolution can be selected to obtain video code flow and be sent to mobile terminal, the latter is the priority scheme being more conducive to follow-up adjustment transcoding node.
S40, load condition self-adaptative adjustment transcoding node according to mobile terminal.
Particularly, scheduler obtains the current loading condition of mobile terminal, judge whether to need to adjust video resolution according to current loading condition, if need adjustment, then send request to the transcoding node that target resolution is corresponding, disconnect simultaneously and operating with the acquisition code stream of former transcoding node, the video code flow that the transcoding node corresponding from target resolution obtains is sent to mobile terminal, thus dynamic conditioning resolution.
For example, to suppose in step S30 first by the video stream of highest resolution to mobile terminal, then scheduler first obtains video code flow from the transcoding node of D1, if now mobile terminal cpu busy percentage higher than 80% time, there is a card situation in video council, then scheduler can obtain video flowing to the transcoding node of HALFD1, and disconnection simultaneously obtains code stream with the transcoding node of D1 and operates; If mobile terminal cpu busy percentage is not higher than 80%, illustrate that mobile terminal still can normal transcoding, then scheduler does not adjust, will the video stream of transcoding node corresponding to D1 to mobile terminal.
The video transcoding method based on mobile terminal of the embodiment of the present invention, by the transcoding adopting multiple transcoding node same video to be carried out to different resolution simultaneously, and detect the load condition of mobile terminal in real time, according to the load condition of mobile terminal, Dynamic Selection transcoding node, thus dynamic regulating video resolution, obtain the optimum efficiency of video playback.The present invention by detecting the real-time status of mobile terminal, and from the demand that dynamic response user video is watched, when can watch video when not affecting user, adjusts video resolution fast, dynamically, improves user's viewing experience.
Embodiment two
Refer to Fig. 2, a kind of transcoding knot adjustment method that the preferred embodiment of the present invention provides comprises the following steps:
The current loading condition of S401, acquisition mobile terminal.
Wherein, after mobile terminal starts receiver, video code stream, the current load condition of mobile terminal active obtaining self can be adopted to report to scheduler, the current loading condition that scheduler mobile terminal receive is reported.Also scheduler can be adopted to send request acquisition current loading condition to mobile terminal, after mobile terminal receives request, obtain self current loading condition and reply to scheduler.Wherein, the current loading condition of mobile terminal depends primarily on cpu busy percentage and internal memory use amount.
S402, judge whether to need to adjust video resolution according to current loading condition, if need adjustment, then perform step S403, otherwise perform step S407.
Particularly, when mobile terminal is in idle condition, then scheduler judges whether current resolution is the highest, if not the highest further, then scheduler is judged as needing to the higher resolution adjustment of the resolution of current video image, and namely target resolution is a higher class resolution ratio; When mobile terminal is in busy condition, then scheduler judges whether current video resolution is minimum further, if not minimum, then scheduler is judged as needing to the lower resolution adjustment of the resolution of current video image, and namely target resolution is a lower class resolution ratio; When mobile terminal is in general state, then scheduler is judged as not needing adjustment, and namely resolution is constant.Wherein, the current loading condition of mobile terminal depends primarily on cpu busy percentage and internal memory use amount, such as: when mobile terminal cpu busy percentage and memory usage are all less than 20% (load is less), definition mobile terminal is for being in idle condition, both cpu busy percentage or internal memory use amount one of them higher than 80% time (load is larger), definition mobile terminal is for being in busy condition, and all the other (load is normal) are all considered as general state.Certainly, concrete definition numerical value can be selected according to actual conditions.
S403, the current transcoding way obtaining transcoding node and the maximum transcoding way that can support.
When judging to need adjustment, before scheduler sends request to transcoding node, can judge that whether the transcoding way of this transcoding node is to reach maximum transcoding way, be specially: scheduler sends the request of maximum transcoding way obtaining current transcoding way and can support to transcoding node, transcoding node obtains current cpu busy percentage and internal memory use amount, use percentage to estimate the maximum transcoding way self can supported according to cpu busy percentage and internal memory, then transcoding way current for transcoding node and the maximum transcoding way valuation that can support are reported scheduler.
Wherein, transcoding node estimates the maximum transcoding way (in actual conditions, cpu busy percentage exists fluctuation, can reserve the cpu busy percentage of about 10%) that can support according to cpu busy percentage and internal memory use percentage.The cpu busy percentage utilization rate of this transcoding node current is X%, memory usage is Y%, then work as X>Y, (1-10%/X%) < (1-10%/Y%), then the maximum transcoding way that this transcoding node can be supported is (1-10%)/X% road; Work as X<Y, (1-10%/X%) > (1-10%/Y%), then the maximum transcoding way that this transcoding node can be supported is (1-10%)/Y% road.
S404, judge whether the current transcoding way of transcoding node reaches the maximum transcoding way that can support, if reached, then perform step S405, otherwise perform step S406.
Particularly, if when the current transcoding way of transcoding node reaches the maximum transcoding way that this transcoding node can support, then scheduler can not send request to it, but increase new transcoding node and carry out transcoding.
S405, increase new transcoding node and carry out target video resolution transcoding.
S406, to send request to the transcoding node that target resolution is corresponding.
S407, the video code flow of acquisition is sent to mobile terminal.
Pass through the embodiment of the present invention, the load condition of real-time detection mobile terminal, judge whether to need to adjust video resolution according to the load condition of mobile terminal, and whether the transcoding way current according to transcoding node reaches the maximum transcoding way that can support judges whether to need newly-increased transcoding node to carry out target video resolution transcoding, thus strengthen fault-tolerant ability further, improve stability.
Embodiment three
As shown in Figure 3, a kind of video code conversion system based on mobile terminal that the embodiment of the present invention provides, is applied to scheduler, and this system comprises receiver module 10, starts module 20, initialization module 30 and adjusting module 40, wherein:
Receiver module 10, for the video request of mobile terminal receive;
Start module 20, obtain the supported resolution of mobile terminal, and start at least two transcoding nodes carry out different resolution transcoding to video;
Wherein, the highest resolution of transcoding node is no more than the supported resolution of mobile terminal.
Initialization module 30, for selecting a transcoding node to obtain video code flow, and is sent to mobile terminal.
Wherein, initialization module 30 obtains video code flow specifically for: random selecting transcoding node; Or, select the transcoding node that resolution is the highest to obtain video code flow.
Adjusting module 40, for the load condition self-adaptative adjustment transcoding node according to mobile terminal.
Refer to Fig. 4, adjustment mould 40 comprises the first acquiring unit 401, first judging unit 402 and transmission unit 403 further:
First acquiring unit 401, for obtaining the current loading condition of mobile terminal;
First judging unit 402, needs the video resolution to mobile terminal to adjust for judging whether according to the current loading condition of mobile terminal;
Transmission unit 403, for when needs adjust, the transcoding node corresponding to target video resolution sends request, and the video code flow of acquisition is sent to mobile terminal.
Adjusting module 40 also comprises second acquisition unit 404, second judging unit 405 and expanding element 406, wherein:
Second acquisition unit 404, for the current transcoding way obtaining transcoding node and the maximum transcoding way that can support;
Whether the second judging unit 405, reach the maximum transcoding way that can support for the transcoding way current according to transcoding node;
Expanding element 406, when reaching for the transcoding way current when transcoding node the maximum transcoding way that can support, increases new transcoding node and carries out target video resolution transcoding.
It should be noted that, the technical characteristic in said method embodiment all can correspondingly be suitable at native system, no longer repeats here.
The video code conversion system based on mobile terminal of the embodiment of the present invention, by the transcoding adopting multiple transcoding node same video to be carried out to different resolution simultaneously, and detect the load condition of mobile terminal in real time, according to the load condition of mobile terminal, Dynamic Selection transcoding node, thus dynamic regulating video resolution, obtain the optimum efficiency of video playback.The present invention by detecting the real-time status of mobile terminal, and from the demand that dynamic response user video is watched, when can watch video when not affecting user, adjusts video resolution fast, dynamically, improves user's viewing experience.And whether the transcoding way current according to transcoding node reaches the maximum transcoding way that can support judges whether to need newly-increased transcoding node to carry out target video resolution transcoding, can strengthen fault-tolerant ability further, improve stability.
One of ordinary skill in the art will appreciate that all or part of step realized in above-described embodiment method is that the hardware that can control to be correlated with by program completes, described program can be stored in a computer read/write memory medium, described storage medium, as ROM/RAM, disk, CD etc.
Above with reference to the accompanying drawings of the preferred embodiments of the present invention, not thereby limit to interest field of the present invention.Those skilled in the art do not depart from the scope and spirit of the present invention interior done any amendment, equivalent replacement and improve, all should within interest field of the present invention.
Claims (10)
1. based on a video transcoding method for mobile terminal, be applied to scheduler, it is characterized in that, the method comprises the following steps:
The video request of mobile terminal receive;
Obtain the supported resolution of described mobile terminal, and start at least two transcoding nodes carry out different resolution transcoding to video;
Select a transcoding node to obtain video code flow, and be sent to mobile terminal;
According to the load condition self-adaptative adjustment transcoding node of described mobile terminal.
2. the video transcoding method based on mobile terminal according to claim 1, is characterized in that, the described load condition self-adaptative adjustment transcoding node according to described mobile terminal comprises further:
Obtain the current loading condition of mobile terminal;
Judge whether to need to adjust video resolution according to the current loading condition of described mobile terminal;
When needs adjust, the transcoding node corresponding to target video resolution sends request, and the video code flow of acquisition is sent to mobile terminal.
3. the video transcoding method based on mobile terminal according to claim 2, is characterized in that, the described current loading condition according to described mobile terminal judges whether to need to adjust video resolution to comprise further:
When mobile terminal is in idle condition, judge whether current resolution is the highest further, if not the highest, be then judged as needing to the higher resolution adjustment of the resolution of current video image;
When mobile terminal is in busy condition, judge whether current video resolution is minimum further, if not minimum, be then judged as needing to the lower resolution adjustment of the resolution of current video image;
When mobile terminal is in general state, be judged as not needing adjustment.
4. the video transcoding method based on mobile terminal according to claim 2, is characterized in that, the described transcoding node corresponding to target video resolution sends taking a step forward of request and comprise:
The current transcoding way obtaining transcoding node and the maximum transcoding way that can support;
When the transcoding way that transcoding node is current reaches the maximum transcoding way that can support, increase new transcoding node and carry out described target video resolution transcoding.
5. the video transcoding method based on mobile terminal according to claim 4, is characterized in that, the current transcoding way of described acquisition transcoding node comprises further with the maximum transcoding way that can support:
Scheduler sends the request of maximum transcoding way obtaining current transcoding way and can support to transcoding node;
Transcoding node obtains current cpu busy percentage and internal memory use amount, uses percentage to estimate the maximum transcoding way self can supported according to cpu busy percentage and internal memory;
Transcoding way current for transcoding node and the maximum transcoding way valuation that can support are reported scheduler.
6. the video transcoding method based on mobile terminal according to claim 1, is characterized in that, described selection transcoding node obtains video code flow and comprises further:
Random selecting transcoding node obtains video code flow;
Or, select the transcoding node that resolution is the highest to obtain video code flow.
7. the video transcoding method based on mobile terminal according to claim 1, it is characterized in that, described startup at least two transcoding nodes carry out video in the transcoding of different resolution, and the highest resolution of transcoding node is no more than the supported resolution of described mobile terminal.
8. based on a video code conversion system for mobile terminal, be applied to scheduler, it is characterized in that, this system comprises with lower module:
Receiver module, for the video request of mobile terminal receive;
Start module, obtain the supported resolution of described mobile terminal, and start at least two transcoding nodes carry out different resolution transcoding to video;
Initialization module, for selecting a transcoding node to obtain video code flow, and is sent to mobile terminal;
Adjusting module, for the load condition self-adaptative adjustment transcoding node according to described mobile terminal.
9. the video code conversion system based on mobile terminal according to claim 8, is characterized in that, described adjusting module comprises the first acquiring unit, the first judging unit and transmission unit further, wherein:
First acquiring unit, for obtaining the current loading condition of mobile terminal;
First judging unit, needs to adjust video resolution for judging whether according to the current loading condition of described mobile terminal;
Transmission unit, for when needs adjust, the transcoding node corresponding to target video resolution sends request, and the video code flow of acquisition is sent to mobile terminal.
10. the video transcoding method based on mobile terminal according to claim 8, is characterized in that, described adjusting module also comprises second acquisition unit, the second judging unit and expanding element, wherein:
Second acquisition unit, for the current transcoding way obtaining transcoding node and the maximum transcoding way that can support;
Whether the second judging unit, reach the maximum transcoding way that can support for the transcoding way current according to described transcoding node;
Expanding element, when reaching for the transcoding way current when transcoding node the maximum transcoding way that can support, increases new transcoding node and carries out target video resolution transcoding.
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