CN103414751A - PC screen content sharing/interaction control method - Google Patents
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Abstract
The invention relates to a PC screen content sharing/interaction control method, specifically, relates to improvement of an existing method of PC screen content sharing. The PC screen content sharing/interaction control method comprises the following steps that: S1, a remote PC host assigns a window of which the content is required to be shared; S2, screen RGB data are obtained in a shared memory data buffer; S3, a software encoder is utilized to perform encoding and compression on data a YUV420 format so as to obtain H.264 video streams; S4, the screen content video streams which have been subjected to encoding and compression are uploaded to a stream media server through an RTMP protocol; S5, a user logs into a Webpage client address which releases media streams of the remote PC host through a browser; S6, control information is transmitted to the remote PC host through a TCP protocol; S7, the remote PC host parses received control information of a user end and displays the received control information on a PC screen; and S8, screen response effect is presented on a Webpage client which the client logs into. With the PC screen content sharing/interaction control method adopted, a user can directly browse the content of the screen through a Webpage browser, and remote interaction control protocols can be customized, and a lightweight system used for PC screen content sharing/interaction can be realized.
Description
Technical field
The present invention relates to a kind of PC screen content and share the interactive control method technical field, more specifically, relate to the improvement of the method that existing PC screen content shares.
Background technology
Internet technology is increasingly mature, in order to meet screen content between the current internet multi-user, shares, the demand of content displaying, interaction, and light-duty screen content share system will universal multimedia interaction application between domestic consumer well.
Multimedia education system adopts specific service end and client to build usually, when implementing multimedia teaching, needs at first on all client's PCs, to install corresponding client software, and operability and applicability are poor.And most of multimedia education systems lack interactively, be only sometimes the giving lessons of the unidirectional teacher of acceptance on screen, for some, need the course teaching of operability not play good effect.Therefore, from the rapid deployment tutoring system, low cost realizes simple interactive teaching and learning, designs a kind ofly light-duty based on the PC screen, share interactive teaching platform and have Practical significance.
The current video conference system adopts Session Initiation Protocol to be responsible for session management usually, and Media Stream is used Real-time Transport Protocol to transmit, and system need to be installed independently system and client, and directly on browser, operate and compare, and complicated operation, applicability is poor.Session Initiation Protocol more complicated in addition, simple application does not need complicated agreement, and inconvenient expansion for specific transactions.In addition, for the demand of lightweight application, make simple interactive control protocol by oneself and have more practicality.
Summary of the invention
The present invention is for overcoming the described at least a defect of above-mentioned prior art, provide a kind of PC screen content to share interactive control method, it uses Video Coding Compression Technology that H.264 screen content (RGB image data) is encoded into, it is packaged into to the FLV form and is uploaded to the streaming media server of increasing income, make it have generality, applicable to common PC, cost consumption is low, and resource overhead is less.And the screen content that uses a kind of general streaming media agreement RTMP will be encoded into video flowing on streaming media server is issued to each user on the internet, make the user can directly by web browser, browse the screen content of main frame.Make the remote interaction control protocol by oneself, that realizes a lightweight shares interactive system for the PC screen content.Between the multi-user, can utilize this lightweight system to carry out on the internet video conference and show the host computer screen content, and go for for the user, realizing learning intuitively alternately in the mutual education scene.
For solving the problems of the technologies described above, the technical solution used in the present invention is: a kind of PC screen content is shared interactive control method, comprises the following steps, and wherein step S1 to S4 is that the content of PC screen is shared step, and step S5 to S8 is the interactive step of controlling of PC screen.
S1. long-range PC main frame is specified and need to be carried out the window that content is shared, and as the name of PPT window, the name of picture window, the screenshotss program will intercept the specified window content, and the on-screen data of acquisition is stored in the shared drive data buffer zone with the rgb format data;
S2. obtain the screen RGB data in the shared drive data buffer zone, be converted into the YUV420 data, amount of compressed data, with the demand of adaptive video coding and real-time Transmission;
S3. utilize software encoder that YUV420 formatted data compression coding is become to H.264 video flowing;
S4. the screen content video flowing that compression coding is good uploads to streaming media server by the RTMP agreement, and streaming media server is published on network, with the RTMP agreement, issues Media Stream by user's request;
S5. the user signs in to the webpage client address of the long-range PC host media stream of issue by browser, and the webpage client is caught mouse or the keyboard operation action of user side;
S6. according to custom remote control protocol, by Transmission Control Protocol to long-range PC main frame control information transmission;
S7. long-range PC main frame is resolved the control information of the user side received, and carries out corresponding control operation, is presented on the PC screen;
S8. the effect of screen response is presented on to the webpage client of user's login.
Further, in described step S1, after obtaining the name of specifying the windows window, the API that calls the windows system carries out screenshotss to the windows window of its appointment, and the length and width parameter according to the actual window of obtaining intercepts automatically.
Further, in described step S3, guarantee that code check can not consume too much bandwidth, can also can browse to smoothly the screen content of main frame in poor network environment, screenshotss frame per second and output frame rate all are defined as to 10 frames, make between smoothness and low consumption and obtain compromise.
Further, in described step S4, the video streaming content of having compressed need to be encapsulated as to FLV according to the RTMP agreement, then by RTMP agreement passing on the RTMP server with Media Stream in form.
In described step S5, the webpage client call Flash plug-in unit of user browser realize that decoding plays, without specific client software is installed, only need to use web browser to sign in to the webpage client address, can browse to sharing of long-range PC main frame screen content.
On the whole, described step S1 and step S2, S3, S4, adhere to two asynchronous threads separately, and these two asynchronous thread concurrent workings improve program efficiency.Simultaneously then the processing policy taked of whole handling process uploads to streaming media server at once for the intercepting one pictures frame video of encoding immediately.
Further, in described step S5, S6, the user realizes the control of long-range PC main frame screen by the webpage client, the webpage client is used the interface of ActionScript to catch mouse action or the keyboard action for the webpage client, and the relative coordinate in the webpage client is recorded during by mouse action, by making agreement by oneself, its coordinate and action message are sent in long-range PC main frame and go; Perhaps catch the keyboard action for the webpage client, by certainly concluding an agreement, it is transferred in long-range PC main frame and goes equally.
In described step S7, after long-range PC main frame receives the control information of user side, API by the Windows system realizes corresponding operation, and the operating effect of response is presented on long-range PC main frame screen display, and the user just can realize the effect that remote interaction is controlled.As screen shows be a PPT content, the user can click the operation that realizes long-range page turning, realize remotely modifying PPT content by keyboard operation by mouse.
Compared with prior art, beneficial effect is:
1, use the mode of intercepting PC screen, become view data that the mode of video flowing H.264 obtains screenshotss to transfer to during H.264 video flowing is uploaded onto the server by image compression encoding, then be published on network for user's remote browse main frame screen content.Adopt fixedly screenshotss and the coding output of frame per second, just guaranteed real-time, fluency and picture continuity to make the user experience well well.
2, use the RTMP server of increasing income, low in resources consumption, install and arrange conveniently.Do not adopt and as the generic video conference system common protocol of Session Initiation Protocol more complicated, carry out screen content and share displaying, but adopt RTMP protocol transmission screen video stream, make client without any software is installed, only need by the URL of browser browse screen content issue, just can realize remote browse screen sharing contents.Using simple RTMP host-host protocol is for lighter simple system applies, makes the unnecessary consumption of resource of using complex protocol to bring without on mini system, can utilize most effectively a small amount of resource to realize simple effect.
3, rely on efficient Coding Compression Algorithm, then the processing policy that whole handling process is taked uploads to streaming media server at once for the intercepting one pictures frame video of encoding immediately, simplify the realization of system, without using complicated memory buffer mechanism, saved memory source.
4, do not use complicated Microsoft's Remote Desktop Control Protocol to realize interactive operation, custom simple protocol, only need client to catch the event of mouse and keyboard, it is sent to the PC main frame by TCP, on distance host, realize response, and will respond effect and feed back to the webpage client by screen content screenshotss video flowing, realized that simple remote desktop controls effect.And, owing to not relating to complicated control protocol, be easy to expand for concrete use scenes.
The accompanying drawing explanation
Fig. 1 is system architecture schematic diagram of the present invention.
Fig. 2 is that the content of PC screen of the present invention is shared the steps flow chart schematic diagram;
Fig. 3 is the interactive steps flow chart schematic diagram of controlling of PC screen of the present invention;
Fig. 4 is long-range PC host side schematic flow sheet of the present invention;
Fig. 5 is webpage client schematic flow sheet of the present invention;
Fig. 6 is user perspective system architecture schematic diagram of the present invention.
Embodiment
Accompanying drawing, only for exemplary illustration, can not be interpreted as the restriction to this patent; For better explanation the present embodiment, some parts of accompanying drawing have omission, zoom in or out, and do not represent the size of actual product; To those skilled in the art, in accompanying drawing some known configurations and explanation thereof may to omit be understandable.
As shown in Figure 1, 2, 3, a kind of PC screen content is shared interactive control method, comprises the following steps, and wherein step S1 to S4 is that the content of PC screen is shared step, and step S5 to S8 is the interactive step of controlling of PC screen.
S1. long-range PC main frame is specified and need to be carried out the window that content is shared, and as the name of PPT window, the name of picture window, the screenshotss program will intercept the specified window content, and the on-screen data of acquisition is stored in the shared drive data buffer zone with the rgb format data;
S2. obtain the screen RGB data in the shared drive data buffer zone, be converted into the YUV420 data, amount of compressed data, with the demand of adaptive video coding and real-time Transmission;
S3. utilize software encoder that YUV420 formatted data compression coding is become to H.264 video flowing;
S4. the screen content video flowing that compression coding is good uploads to streaming media server by the RTMP agreement, and streaming media server is published on network, with the RTMP agreement, issues Media Stream by user's request;
S5. the user signs in to the webpage client address of the long-range PC host media stream of issue by browser, and the webpage client is caught mouse or the keyboard operation action of user side;
S6. according to custom remote control protocol, by Transmission Control Protocol to long-range PC main frame control information transmission;
S7. long-range PC main frame is resolved the control information of the user side received, and carries out corresponding control operation, is presented on the PC screen;
S8. the effect of screen response is presented on to the webpage client of user's login.
Further, in described step S1, after obtaining the name of specifying the windows window, the API that calls the windows system carries out screenshotss to the windows window of its appointment, and the length and width parameter according to the actual window of obtaining intercepts automatically.
Further, in described step S3, guarantee that code check can not consume too much bandwidth, can also can browse to smoothly the screen content of main frame in poor network environment, screenshotss frame per second and output frame rate all are defined as to 10 frames, make between smoothness and low consumption and obtain compromise.
Further, in described step S4, the video streaming content of having compressed need to be encapsulated as to FLV according to the RTMP agreement, then by RTMP agreement passing on the RTMP server with Media Stream in form.
In described step S5, the webpage client call Flash plug-in unit of user browser realize that decoding plays, without specific client software is installed, only need to use web browser to sign in to the webpage client address, can browse to sharing of long-range PC main frame screen content.
On the whole, described step S1 and step S2, S3, S4, adhere to two asynchronous threads separately, and these two asynchronous thread concurrent workings improve program efficiency.Simultaneously then the processing policy taked of whole handling process uploads to streaming media server at once for the intercepting one pictures frame video of encoding immediately.
Further, in described step S5, S6, the user realizes the control of long-range PC main frame screen by the webpage client, the webpage client is used the interface of ActionScript to catch mouse action or the keyboard action for the webpage client, and the relative coordinate in the webpage client is recorded during by mouse action, by making agreement by oneself, its coordinate and action message are sent in long-range PC main frame and go; Perhaps catch the keyboard action for the webpage client, by certainly concluding an agreement, it is transferred in long-range PC main frame and goes equally.
In described step S7, after long-range PC main frame receives the control information of user side, API by the Windows system realizes corresponding operation, and the operating effect of response is presented on long-range PC main frame screen display, and the user just can realize the effect that remote interaction is controlled.As screen shows be a PPT content, the user can click the operation that realizes long-range page turning, realize remotely modifying PPT content by keyboard operation by mouse.
As shown in Figure 4, be long-range PC host side schematic flow sheet, its step is as follows:
A. long-range PC main frame is specified and need to be carried out the window that content is shared, as the name of PPT window, the name of picture window;
B. whether accept according to demand Long-distance Control and carry out branch process, if do not need, do not open up remote interaction control and management process, carry out following operation; Otherwise, open up new process, be parallel to following operation;
Thread one: the screenshotss program will intercept specifies the content of sharing window, and the on-screen data of acquisition is stored in the shared drive data buffer zone with the rgb format data;
C. thread two: the screen RGB data in the shared drive data buffer zone are converted to the YUV420 data, utilize software encoder that YUV420 formatted data compression coding is become to H.264 video flowing; The screen content video stream data that compression coding is good uploads to streaming media server by the RTMP agreement, and streaming media server is published on network, with the RTMP agreement, issues Media Stream by user's request;
If d. need to newly open up remote interaction, control process, circular wait receives the control information of user side, then resolves, and responds on main frame.
As shown in Figure 5, be webpage client schematic flow sheet, its step is as follows:
A. accept user's login;
B. the webpage client is to the Media Stream of the long-range PC screen of streaming media server request;
C. call browser Flash plug-in unit decoding displaying video stream;
D. judge whether distance host accepts user's mutual control, if do not accept do not carry out following operation, otherwise, operation below carrying out;
E. catch mouse or the keyboard operation action of user side;
F. according to custom remote control protocol, by Transmission Control Protocol to long-range PC main frame control information transmission.
As shown in Figure 6, comprehensive long-range PC host side and webpage client, from user perspective descriptive system implementing procedure, its step is as follows:
(1) main frame is specified the sharing contents window, and program is carried out the screenshotss operation, and carries out compressed encoding and become video flowing to upload to streaming media server, and streaming media server is issued this video flowing on network;
(2) user is known the webpage client URL corresponding to video flowing of distance host issue, signs in to the webpage client by web browser;
(3) the webpage client is to video stream data corresponding to streaming media server request, and the Flash plug-in unit that the calls browser broadcasting of decoding, and distance host shared to windows content and be presented on user's screen;
(4) if the open user's of reception of distance host remote interaction is controlled, the webpage client is by mouse and the keyboard action of constantly catching use, and by Transmission Control Protocol, is transferred to distance host according to custom control protocol is packaged;
(5) distance host receives user's control information, resolves, responds, and is presented on screen change, thereby reaches the effect that user's remote interaction is controlled.
The corresponding same or analogous parts of same or analogous label; In accompanying drawing, describe position relationship only for exemplary illustration, can not be interpreted as the restriction to this patent.
The above is only the preferred embodiment of the present invention, it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, to the technical scheme of invention, can do the improvement of some applicable actual conditions.Therefore, protection scope of the present invention is not limited to this, and those of skill in the art are any to be included within protection range of the present invention based on non-material change on technical solution of the present invention.
Claims (7)
1. a PC screen content is shared interactive control method, it is characterized in that comprising the following steps:
S1. long-range PC main frame is specified and need to be carried out the window that content is shared, and the screenshotss program will intercept the specified window content, and the on-screen data of acquisition is stored in the shared drive data buffer zone with the rgb format data;
S2. obtain the screen RGB data in the shared drive data buffer zone, be converted into the YUV420 data, amount of compressed data, with the demand of adaptive video coding and real-time Transmission;
S3. utilize software encoder that YUV420 formatted data compression coding is become to H.264 video flowing;
S4. the screen content video flowing that compression coding is good uploads to streaming media server by the RTMP agreement, and streaming media server is published on network, with the RTMP agreement, issues Media Stream by user's request;
S5. the user signs in to the webpage client address of the long-range PC host media stream of issue by browser, and the webpage client is caught mouse or the keyboard operation action of user side;
S6. according to custom remote control protocol, by Transmission Control Protocol to long-range PC main frame control information transmission;
S7. long-range PC main frame is resolved the control information of the user side received, and carries out corresponding control operation, is presented on the PC screen;
S8. the effect of screen response is presented on to the webpage client of user's login.
2. a kind of PC screen content according to claim 1 is shared interactive control method, it is characterized in that, in described step S1, after obtaining the name of specifying the windows window, the API that calls the windows system carries out screenshotss to the windows window of its appointment, and the length and width parameter according to the actual window of obtaining intercepts automatically.
3. a kind of PC screen content according to claim 1 is shared interactive control method, it is characterized in that, in described step S3, screenshotss frame per second and output frame rate are all 10 frames.
4. a kind of PC screen content according to claim 1 is shared interactive control method, it is characterized in that, in described step S4, the video streaming content of having compressed need to be encapsulated as to FLV according to the RTMP agreement, then by RTMP agreement passing on the RTMP server with Media Stream in form.
5. a kind of PC screen content according to claim 1 is shared interactive control method, it is characterized in that, described step S1 and step S2, S3, S4, adhere to two asynchronous threads separately, these two asynchronous thread concurrent workings.
6. a kind of PC screen content according to claim 1 is shared interactive control method, it is characterized in that, in described step S5, S6, the user realizes the control of long-range PC main frame screen by the webpage client, the webpage client is used the interface of ActionScript to catch mouse action or the keyboard action for the webpage client, and the relative coordinate in the webpage client is recorded during by mouse action, by making agreement by oneself, its coordinate and action message are sent in long-range PC main frame and go; Perhaps catch the keyboard action for the webpage client, by certainly concluding an agreement, it is transferred in long-range PC main frame and goes equally.
7. a kind of PC screen content according to claim 1 is shared interactive control method, it is characterized in that, in described step S7, after long-range PC main frame receives the control information of user side, API by the Windows system realizes corresponding operation, the operating effect of response is presented on long-range PC main frame screen display, and the user just can realize the effect that remote interaction is controlled.
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