CN104144322A - Method and system for achieving video monitoring on mobile terminal and video processing server - Google Patents
Method and system for achieving video monitoring on mobile terminal and video processing server Download PDFInfo
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- CN104144322A CN104144322A CN201310172428.XA CN201310172428A CN104144322A CN 104144322 A CN104144322 A CN 104144322A CN 201310172428 A CN201310172428 A CN 201310172428A CN 104144322 A CN104144322 A CN 104144322A
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Abstract
The invention relates to a method and system for achieving video monitoring on a mobile terminal and a video processing server. The method comprises the step of receiving video streaming collected by a camera and decoding the video streaming, the step of extracting decoded key frames according to user demands, the step of packing the key frames into a picture format, and the step of pushing the packed picture file to the mobile terminal in a file mode. By means of the method and system for achieving video monitoring on the mobile terminal and the video processing server, the problems of screen blurring and mosaic occurring when the 3G network condition cannot meet the video transmission requirement can be solved .
Description
Technical field
The disclosure relates to video monitoring, especially, relates to a kind of method, system and Video processing server of realizing video monitoring on mobile terminal.
Background technology
Video monitoring of mobile phone service application is more and more universal, is widely used in the every field such as security protection, enterprise rollout, and user's frequency of browsing video on mobile phone is more and more higher.
The video quality of traditional video surveillance is generally CIF(Common Intermediate Format, universal media form, 352 * 288 pixels), D1(704 * 576 pixel), 1280 * 720 pixels of 720P(under lining by line scan), 1920 * 1080 pixels of 1080P(under lining by line scan) form, full frame is 25 frames/S.The code stream situation of D1 image in different resolution is about 1.5Mbps, because 3G network can not meet D1 or the required bandwidth of image transmitting of high resolution scheme more, so D1 or more the image of high resolution scheme under 3G network condition, be difficult to normal transmission.
The usual manner that prior art adopts when addressing this problem, for by increasing video code conversion unit, reduces video flowing resolution, frame per second by the code stream of front end transmission by the mode of coding again of decoding, and adapts to 3G network transmission environment and mobile phone decoding capability.
Although this mode of prior art has reduced resolution, the frame per second of video flowing, but, in transmitting procedure, may still there is the problem of LOF, if lost P frame (predictive-frame, forward-predictive-coded frames), can cause flower screen and mosaic effect.
Summary of the invention
The disclosure has proposed new technical scheme in view of at least one in above problem.
The disclosure provides a kind of method that realizes video monitoring on mobile terminal aspect one, and it can solve flower screen and the mosaic phenomenon occurring when 3G network condition does not reach transmission of video requirement.
The disclosure provides a kind of Video processing server on the other hand at it, and it can solve flower screen and the mosaic phenomenon occurring when 3G network condition does not reach transmission of video requirement.
The disclosure provides a kind of system that realizes video monitoring on mobile terminal at it aspect another, and it can solve flower screen and the mosaic phenomenon occurring when 3G network condition does not reach transmission of video requirement.
According to the disclosure, a kind of method that realizes video monitoring on mobile terminal is provided, comprising:
Receive the video flowing of camera collection, and video flowing is decoded;
According to user's request, extract decoded key frame;
Key frame is packaged into picture format;
With document form, to mobile terminal, push the picture file after packing.
In embodiment more of the present disclosure, the method also comprises:
Mobile terminal is after receiving picture file, and the timestamp information entrained according to each picture file shows the picture in each picture file continuously.
In embodiment more of the present disclosure, the step of extracting decoded key frame according to user's request comprises:
The continuity demand of judgement user to image;
As user to the continuity demand of image higher than setting threshold, extract decoded each key frame, otherwise, according to setting-up time interval, extract decoded key frame.
According to the disclosure, a kind of Video processing server is also provided, comprising:
Decoding unit, for receiving the video flowing of camera collection, and decodes to video flowing;
Key-frame extraction unit, for extracting decoded key frame according to user's request;
Picture packaged unit, for being packaged into picture format by key frame;
File push unit, for pushing the picture file after packing with document form to mobile terminal.
In embodiment more of the present disclosure, key-frame extraction unit comprises:
Continuity judgment sub-unit, for judging the continuity demand of user to image;
Extract subelement, for as user to the continuity demand of image higher than setting threshold, extract decoded each key frame, otherwise, according to setting-up time interval, extract decoded key frame.
According to the disclosure, a kind of system that realizes video monitoring on mobile terminal has also been proposed, comprise the Video processing server in mobile terminal and previous embodiment.
In embodiment more of the present disclosure, mobile terminal is after receiving picture file, and the timestamp information entrained according to each picture file shows the picture in each picture file continuously.
In technical scheme of the present disclosure, after video flowing is decoded, no longer encode, but utilize decoded key frame to form picture format, then with document form, to mobile terminal, transmit picture file.This file is different from stream transmission mode of the prior art, owing to there not being the problem of frame losing, and the flower screen and the mosaic phenomenon that in the time of therefore can effectively avoiding 3G network condition not reach transmission of video requirement, occur.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide further understanding of the disclosure, forms the application's a part.In the accompanying drawings:
Fig. 1 is the schematic flow sheet that embodiment of the disclosure realizes the method for video monitoring on mobile terminal.
Fig. 2 is the structural representation of the Video processing server of an embodiment of the disclosure.
Fig. 3 is the structural representation of the Video processing server of another embodiment of the disclosure.
Fig. 4 is the structural representation that embodiment of the disclosure realizes the system of video monitoring on mobile terminal.
Embodiment
The disclosure is described below with reference to accompanying drawings.Be noted that following being described in is only explanatory and exemplary in essence, never as any restriction to the disclosure and application or use.Unless stated otherwise, otherwise the parts of setting forth in an embodiment and the positioned opposite of step and numeral expression formula and numerical value do not limit the scope of the present disclosure.In addition, technology well known by persons skilled in the art, method and apparatus may not be discussed in detail, but are intended in appropriate circumstances become a part for specification.
While not reaching transmission of video requirement in order to solve 3G network condition, the problems such as the flower screen that transmitting video image may produce, mosaic, the following embodiment of the disclosure is without first decoding as prior art, after having reduced the resolution of video flowing, frame per second, re-start again coding, and to the video flowing after mobile terminal transfer encoding.The disclosure is directly carried out Key Frame Extraction by the frame to after decoding video stream, and the key frame of extraction is converted to picture format, and directly to mobile terminal, transmits picture but not video flowing.
Fig. 1 is the schematic flow sheet that embodiment of the disclosure realizes the method for video monitoring on mobile terminal.
As shown in Figure 1, this embodiment can comprise the following steps:
S102, receives the video flowing of camera collection, and video flowing is decoded;
Generally, after being decoded, video flowing can obtain key frame and non-key frame.
Key frame is called again I frame (intra picture, inner picture), is the important frame in interframe compression coding, and it is the coded frame of a full frame compression.During decoding, only use the data of I frame with regard to restructural complete image, I frame does not need to generate with reference to other pictures, and video file is comprised of a plurality of continuous pictures.
Non-key frame comprises P frame and B frame (bi-directional interpolated prediction frame, bi-directional predicted interpolation coding frame).
P frame in non-key frame is by the P frame before it or the prediction of I frame, and it compares and the P frame before it or identical information or the data between I frame, also considers that the characteristic of motion is carried out interframe compression.
What the B frame in non-key frame adopted is bi-directional predicted interframe compression algorithm.When a frame is compressed into B frame, it carrys out distilled edition frame according to the difference of adjacent former frame, this frame and rear frame data, also the i.e. difference of minute book frame and front and back frame only.Only have the compression of the B of employing frame just can reach the high compression of 200:1.Usually, I frame compression efficiency is minimum, and P frame is higher, and B frame is the highest.
S104, extracts decoded key frame according to user's request;
For example, can extract decoded each key frame, also can extract decoded key frame according to certain time interval.
S106, is packaged into picture format by key frame;
That is, each key frame is converted to respectively to picture format, and is stored as a picture file.
S108, pushes the picture file after packing with document form to mobile terminal.
This embodiment no longer encodes after video flowing is decoded, but utilizes decoded key frame to form picture format, then with document form, to mobile terminal, transmits picture file.This file is different from stream transmission mode of the prior art, owing to there not being the problem of frame losing, and the flower screen and the mosaic phenomenon that in the time of therefore can effectively avoiding 3G network condition not reach transmission of video requirement, occur.
Further, mobile terminal is after receiving picture file, and the timestamp information entrained according to each picture file shows the picture in each picture file continuously.
Particularly, the timestamp information about each picture can be carried by the filename of each picture file.
In step S104, the step of extracting decoded key frame according to user's request can comprise:
The continuity demand of judgement user to image;
As user to the continuity demand of image higher than setting threshold, extract decoded each key frame to guarantee the continuity of image, otherwise, according to setting-up time interval, extract decoded key frame, under the prerequisite of meeting consumers' demand, can reduce network load like this.
Disclosure above-described embodiment is based on video stream transcoding figure chip technology, after to decoding video stream, directly abandon non-key picture frame, according to set strategy (for example, transmission 1 frame per second or a few two field picture) key images frame is packaged into continuous picture is then pushed to view side, it is cell-phone customer terminal, because mobile phone terminal does not have Video stream information, receive only picture file, therefore both can solve the image producing when 3G network condition does not reach transmission of video requirement and spend the phenomenons such as screen, mosaic, can also greatly reduce transcoding pressure.
Next, then by an instantiation technical scheme of the present disclosure is described in detail.
First, platform transcoding units receives after the video flowing of front end transmission, decodes, because picture format requirement of real-time is lower, therefore key frame information is packaged into picture format, in the situation that bandwidth is inadequate, also there will not be like this problems such as mosaic and Hua Ping.
Secondly, because document form is low to network bandwidth requirement, therefore picture can be pushed directly to mobile phone terminal with document form and play container, mobile phone terminal is shown without carrying out video decode, directly in container, is shown continuous pictorial information.
In addition, also designed following picture packing strategy:
(1) all key frame packings: decoding image I frame out is all packed.
(2) press fixed interval packing, played bag directly transmission afterwards: for the less demanding user of image continuity, can for example, every Fixed Time Interval (, one per second) an I frame be packaged into a pictures, after packing, this picture be transferred to client with document form.
One of ordinary skill in the art will appreciate that, whole and the part steps that realizes said method embodiment can complete by the relevant hardware of program command, aforesaid program can be stored in a computing equipment read/write memory medium, this program is when carrying out, execution comprises the step of said method embodiment, and aforesaid storage medium can comprise the various media that can be program code stored such as ROM, RAM, magnetic disc and CD.
Fig. 2 is the structural representation of the Video processing server of an embodiment of the disclosure.
As shown in Figure 2, the Video processing server 20 in this embodiment can comprise decoding unit 202, key-frame extraction unit 204, picture packaged unit 206 and file push unit 208.Wherein,
Decoding unit 202, for receiving the video flowing of camera collection, and decodes to video flowing, wherein,, after being decoded, video flowing can obtain key frame (that is, I frame) and non-key frame (that is, P frame and B frame);
Key-frame extraction unit 204, for extract decoded key frame according to user's request, for example, can extract decoded each key frame, also can extract decoded key frame according to certain time interval;
Picture packaged unit 206, for key frame is packaged into picture format, that is, is converted to respectively picture format by each key frame, and is stored as a picture file;
File push unit 208, for pushing the picture file after packing with document form to mobile terminal.
This embodiment no longer encodes after video flowing is decoded, but utilizes decoded key frame to form picture format, then with document form, to mobile terminal, transmits picture file.This file is different from stream transmission mode of the prior art, owing to there not being the problem of frame losing, and the flower screen and the mosaic phenomenon that in the time of therefore can effectively avoiding 3G network condition not reach transmission of video requirement, occur.
Fig. 3 is the structural representation of the Video processing server of another embodiment of the disclosure.
As shown in Figure 3, compare with the embodiment in Fig. 2, the key-frame extraction unit 302 in the Video processing server 30 of this embodiment can comprise continuity judgment sub-unit 302a and extract subelement 302b.Wherein,
Continuity judgment sub-unit 302a, for judging the continuity demand of user to image;
Extract subelement 302b, for as user to the continuity demand of image higher than setting threshold, extract decoded each key frame to guarantee the continuity of image, otherwise, according to setting-up time interval, extract decoded key frame, under the prerequisite of meeting consumers' demand, can reduce network load like this.
Fig. 4 is the structural representation that embodiment of the disclosure realizes the system of video monitoring on mobile terminal.
As shown in Figure 4, the system 40 in this embodiment can comprise mobile terminal 402 and Video processing server 404.Wherein, Video processing server can be realized according to the mode of previous embodiment.
Further, mobile terminal is after receiving picture file, and the timestamp information entrained according to each picture file shows the picture in each picture file continuously.
Particularly, the timestamp information about each picture can be carried by the filename of each picture file.
In this specification, each embodiment all adopts the mode of going forward one by one to describe, and what each embodiment stressed is and the difference of other embodiment that part identical with similar between each embodiment can cross-references.For device embodiment, because it is substantially similar to embodiment of the method, so description is fairly simple, relevant part can be referring to the explanation of embodiment of the method part.
Disclosure above-described embodiment has following beneficial effect:
(1) owing to only video flowing being decoded, no longer it is carried out to recompile, therefore, significantly reduced the processing load of transcoding;
(2) due to what transmit to mobile terminal, be the file of picture format, but not therefore video flowing carry out decode operation without mobile terminal again, and then without player plug-in being installed in mobile terminal inside, has reduced the complexity of mobile terminal again;
(3) due to mobile terminal transmission be the file of picture format, therefore but not, there is not the problem of frame losing in video flowing in transmitting procedure, and then just there will not be the problems such as the colored screen that exists in prior art, mosaic yet.
Although described the disclosure with reference to exemplary embodiment, should be understood that the disclosure is not limited to above-mentioned exemplary embodiment.It will be obvious to those skilled in the art that and can under the condition that does not deviate from the scope of the present disclosure and spirit, revise above-mentioned exemplary embodiment.The scope of appended claim should be endowed the widest explanation, with the 26S Proteasome Structure and Function that comprises all such modifications and be equal to.
Claims (7)
1. on mobile terminal, realize a method for video monitoring, it is characterized in that, comprising:
Receive the video flowing of camera collection, and described video flowing is decoded;
According to user's request, extract decoded key frame;
Described key frame is packaged into picture format;
With document form, to described mobile terminal, push the picture file after packing.
2. the method that realizes video monitoring on mobile terminal according to claim 1, is characterized in that, described method also comprises:
Described mobile terminal is after receiving picture file, and the timestamp information entrained according to each picture file shows the picture in each picture file continuously.
3. the method that realizes video monitoring on mobile terminal according to claim 1, is characterized in that, the described step of extracting decoded key frame according to user's request comprises:
The continuity demand of judgement user to image;
As described in user to the continuity demand of image higher than setting threshold, extract decoded each key frame, otherwise, according to setting-up time interval, extract decoded key frame.
4. a Video processing server, is characterized in that, comprising:
Decoding unit, for receiving the video flowing of camera collection, and decodes to described video flowing;
Key-frame extraction unit, for extracting decoded key frame according to user's request;
Picture packaged unit, for being packaged into picture format by described key frame;
File push unit, for pushing the picture file after packing with document form to described mobile terminal.
5. Video processing server according to claim 4, is characterized in that, described key-frame extraction unit comprises:
Continuity judgment sub-unit, for judging the continuity demand of user to image;
Extract subelement, for as described in user to the continuity demand of image higher than setting threshold, extract decoded each key frame, otherwise, according to setting-up time interval, extract decoded key frame.
6. on mobile terminal, realize a system for video monitoring, it is characterized in that, comprise the Video processing server described in any one in mobile terminal and claim 4 to 5.
7. the system that realizes video monitoring on mobile terminal according to claim 6, is characterized in that, described mobile terminal is after receiving picture file, and the timestamp information entrained according to each picture file shows the picture in each picture file continuously.
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Application publication date: 20141112 |