CN112199147A - Screen recording method and system applied to intelligent terminal and computer readable storage medium - Google Patents
Screen recording method and system applied to intelligent terminal and computer readable storage medium Download PDFInfo
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- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/44—Arrangements for executing specific programs
- G06F9/451—Execution arrangements for user interfaces
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- G—PHYSICS
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- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/048—Interaction techniques based on graphical user interfaces [GUI]
- G06F3/0481—Interaction techniques based on graphical user interfaces [GUI] based on specific properties of the displayed interaction object or a metaphor-based environment, e.g. interaction with desktop elements like windows or icons, or assisted by a cursor's changing behaviour or appearance
Abstract
The invention provides a screen recording method, a system and a computer readable storage medium applied to an intelligent terminal, wherein the screen recording method comprises the following steps: creating a virtual display unit and connecting the virtual display unit with the application program to be recorded in a communication manner; the display management unit which is in communication connection with the virtual display unit generates a display request, wherein the display request comprises a limited frame rate and/or keywords; a system server end which is in communication connection with the display management unit receives the display request and modifies the zone bit in the display area based on the display request; a screen projection unit in communication connection with a system server receives the modification instruction of the zone bit and gives a name to limit the frame rate to a display device unit; the display device unit displays an interface of an application program based on the defined frame rate. By adopting the technical scheme, the screen recording power consumption can be reduced, the operation resource during layer synthesis can be reduced, and the user privacy can be protected.
Description
Technical Field
The invention relates to the field of intelligent terminal control, in particular to a screen recording method and system applied to an intelligent terminal and a computer readable storage medium.
Background
With the rapid development of the intelligent terminal, a user uses the intelligent terminal to perform various operations to meet the needs of the user, such as running a game application program for entertainment operation and running a video application program for relaxation operation. When the intelligent terminal is used, due to the size limitation of the display interface of the intelligent terminal, for example, the existing common sizes are 6.7 inches, 6 inches and the like, the use impression of a user on a television interface can not be met. Therefore, when some users use the intelligent terminal, the interface displayed by the intelligent terminal is put on a television interface which is in communication connection (in the same local area network) with the intelligent terminal in real time, and then screen throwing operation is completed.
Taking an android system as an example, the screen projection operation is mainly realized by the following method: specifically, the android system draws data which is refreshed on a screen in real time on the intelligent terminal to the virtual display, receives an event notification of framework available from a framework layer, stores the data in a MediaCodec to encode, and performs Muxer on the encoded data to encapsulate the encoded data into mp4 or other video formats.
Under the existing android technical framework, the virtual display is only the copy of the main display content, so the refresh rate of the virtual display and the logic of each layer composition can be consistent with the content of all current display interfaces of the intelligent terminal, namely the logic of the main display is kept consistent. In addition, with the further improvement of the refresh rate of the intelligent terminal, the screen recording power consumption is increased in a nonlinear mode, and finally the power consumption of the whole function is beyond expectation.
Therefore, a novel screen recording method, a novel screen recording system and a novel computer readable storage medium applied to an intelligent terminal are needed, and the screen recording power consumption is reduced through a user-defined refresh rate under the condition that the output impression experience is not reduced.
Disclosure of Invention
In order to overcome the technical defects, the invention aims to provide a screen recording method, a screen recording system and a computer readable storage medium applied to an intelligent terminal, which can reduce screen recording power consumption, reduce operation resources during layer composition and protect user privacy.
The invention discloses a screen recording method applied to an intelligent terminal, which comprises the following steps:
creating a virtual display unit and connecting the virtual display unit with the application program to be recorded in a communication manner;
the display management unit which is in communication connection with the virtual display unit generates a display request, wherein the display request comprises a limited frame rate and/or keywords;
a system server end which is in communication connection with the display management unit receives the display request and modifies the zone bit in the display area based on the display request;
a screen projection unit in communication connection with a system server receives the modification instruction of the zone bit and gives a name to limit the frame rate to a display device unit;
the display device unit displays an interface of an application program based on the defined frame rate.
Preferably, the step of generating a display request by a display management unit communicatively connected to the virtual display unit, the display request including a frame rate and/or a keyword is comprised of:
receiving a screen recording request by an application program to be recorded;
setting a display request through an application program interface of an application program reflected to the virtual display unit;
and calling the display management unit through the virtual display unit, and switching the application process of the application program to the process of the system server.
Preferably, the system server communicatively connected to the display management unit receives the display request, and the step of modifying the flag bit in the display area based on the display request includes:
a display management server in the system server receives a display request from a display management unit;
the display management server sends traversing requests for traversing all currently running virtual display units to interface control units in the virtual display units;
the interface control unit traverses the virtual display unit based on the traversal request to check whether a screen recording request for capturing the interface of the application program exists;
and when the virtual display unit with the screen recording request of the interface of the capturing application program is found, sending a calling instruction to the local service unit.
Preferably, the system server communicatively connected to the display management unit receives the display request, and the step of modifying the flag bit in the display area based on the display request further includes:
the local service unit responds to the call instruction and transmits a display request to an interface design client;
the interface design client modifies the flag of the display area based on the display request.
Preferably, the screen projection unit in communication connection with the system server receives the modification instruction of the flag bit, and gives a name to limit the frame rate to the display device unit, and the step includes:
a screen projection unit connected with the interface design client receives the modification instruction of the zone bit and gives a name to limit the frame rate to a display equipment unit;
when the screen projection unit processes the refresh command, the refresh state is controlled by the limited frame rate name of the display device unit.
The invention also discloses a screen recording system applied to the intelligent terminal, wherein the screen recording system comprises a virtual display unit, a display management unit, a system server and a screen projection unit;
the virtual display unit is in communication connection with the application program to be recorded;
the display management unit which is in communication connection with the virtual display unit generates a display request, wherein the display request comprises a limited frame rate and/or keywords;
a system server end which is in communication connection with the display management unit receives the display request and modifies the zone bit in the display area based on the display request;
a screen projection unit in communication connection with a system server receives the modification instruction of the zone bit and gives a name to limit the frame rate to a display device unit;
the display device unit displays an interface of an application program based on the defined frame rate.
Preferably, the application program to be recorded receives a screen recording request;
reflecting the application program interface setting display request of the application program of the virtual display unit;
and the virtual display unit calls the display management unit to switch the application process of the application program to the process of the system server.
Preferably, a display management server in the system server receives a display request from the display management unit;
the display management server sends traversing requests for traversing all currently running virtual display units to interface control units in the virtual display units;
the interface control unit traverses the virtual display unit based on the traversal request to check whether a screen recording request for capturing the interface of the application program exists;
when the virtual display unit with the screen recording request for capturing the interface of the application program is found, the interface control unit issues a calling instruction to the local service unit;
the local service unit responds to the call instruction and transmits a display request to an interface design client;
the interface design client modifies the flag of the display area based on the display request.
Preferably, the screen projection unit connected with the interface design client receives the modification instruction of the zone bit and gives a name to limit the frame rate to the display equipment unit;
when the screen projection unit processes the refresh command, the refresh state is controlled by the limited frame rate name of the display device unit.
The invention also discloses a computer readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps as described above.
After the technical scheme is adopted, compared with the prior art, the method has the following beneficial effects:
1. original video impression experience is kept, and the use impression of a user is basically not influenced;
2. the screen recording power consumption is greatly reduced;
3. by only synthesizing a certain key layer, the operation resource during the layer synthesis can be reduced, and the function of protecting the privacy of the user can be achieved.
Drawings
FIG. 1 is a schematic flow chart of a screen recording method according to a preferred embodiment of the present invention;
FIG. 2 is a schematic diagram of a screen recording system according to a preferred embodiment of the present invention;
FIG. 3 is a flowchart of an App end in an android system;
FIG. 4 is a flow chart of the Java layer at the SystemServer side in the android system;
FIG. 5 is a flow chart of a SystemServer-side Native layer within the android system;
fig. 6 is a flow chart of the SurfaceFlinger side in the android system.
Detailed Description
The advantages of the invention are further illustrated in the following description of specific embodiments in conjunction with the accompanying drawings.
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.
The terminology used in the present disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used in this disclosure and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.
It is to be understood that although the terms first, second, third, etc. may be used herein to describe various information, such information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present disclosure. The word "if" as used herein may be interpreted as "at … …" or "when … …" or "in response to a determination", depending on the context.
In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention.
In the description of the present invention, unless otherwise specified and limited, it is to be noted that the terms "mounted," "connected," and "connected" are to be interpreted broadly, and may be, for example, a mechanical connection or an electrical connection, a communication between two elements, a direct connection, or an indirect connection via an intermediate medium, and specific meanings of the terms may be understood by those skilled in the art according to specific situations.
In the following description, suffixes such as "module", "component", or "unit" used to denote elements are used only for facilitating the explanation of the present invention, and have no specific meaning in themselves. Thus, "module" and "component" may be used in a mixture.
Referring to fig. 1, a schematic flow chart of a screen recording method applied in an intelligent terminal according to a preferred embodiment of the present invention is shown, in which the screen recording method includes the following steps:
s100: creating a virtual display unit and connecting the virtual display unit with the application program to be recorded in a communication manner;
a virtual display unit, namely a virtual display object, is created in the intelligent terminal, and the virtual display unit can be in communication connection with the application program to be recorded so as to obtain the current display content of the application program to be recorded. During recording, the current display content and data of the application program are drawn to the virtual display unit by the operating system of the intelligent terminal and are displayed by the external display equipment connected with the intelligent terminal.
S200: the display management unit which is in communication connection with the virtual display unit generates a display request, wherein the display request comprises a limited frame rate and/or keywords;
in step S200, the authorized application is called, that is, when the application program receives the operation of the user and needs to perform screen projection, an IPC (inter-process communication) call is performed. Specifically, step S200 includes:
s210: receiving a screen recording request by an application program to be recorded;
s220: setting a display request through an application program interface (api) of an application program reflected to the virtual display unit, the display request including defining a frame rate and/or capturing keywords within an interface of the application program to be screen-recorded, as described above. It is understood that the limited frame rate can be a variety of frame rates customized by the user, such as 144Hz, 120Hz, 90Hz, 60Hz, or even as low as 1 Hz. In addition, the specified content residence in the application program interface realizes that part of the image layers can be arbitrarily grabbed according to the user requirements, so that the display can be avoided and the user information can be protected when the privacy message is presented in the screen recording process;
s230: and calling the display management unit (DisplayManager object) through the virtual display unit, and switching the application process of the application program to the process of the system server.
Referring to fig. 3, in the authorization application phase, a key word for limiting the frame rate/capturing a specific Surface is set through a reflection api (application program interface), and then a DisplayManager object is called through a virtualdisplayobject, where the DisplayManager object is actually a proxy object of a DisplayManager service object at an application side required for screen recording. After the call is completed, the running process is switched from the application process to the SystemServer process, where there is one IPC (inter-process communication) call.
S300: a system server end which is in communication connection with the display management unit receives the display request and modifies the zone bit in the display area based on the display request;
in step S300, the display content is modified according to the required refresh frequency in the operating system according to the display request. Specifically, step S300 includes:
s310: a display management server (DisplayManager) in a system server (systemesover) receives a display request from a display management unit;
s320: the display management server sends a traversal (traversal) request for traversing all the currently running virtual display units to an interface control unit (SurfaceControl) in the virtual display unit;
s330: the interface control unit traverses the virtual display unit based on the traversal request to check whether a screen recording request for capturing the interface of the application program exists;
s340: and when the virtual display unit with the screen recording request for capturing the interface of the application program is found, sending a calling instruction to a local service unit (Native terminal).
Referring to fig. 4, the processing flow of the system server is as follows: the displaymanageservice receives a request for setting a qualified frame rate/grabbing a specific Surface keyword from an application-side proxy object DisplayManager. The displaymanager service firstly finds the corresponding VirtualDisplay needing to be modified by traversing all the current VirtualDisplays, then sets a limited frame rate/captures a specific Surface keyword by the SurfaceControl inside the VirtualDevice object, and requests a traversal (traversal). The SurfaceControl responds to the request to the traversal and processes. When the traversal is processed, if the fact that the appeal for setting the limited frame rate/grabbing the specific Surface exists is checked, the designation is issued to the native terminal.
Further, step S300 further includes:
s350: the local service unit responds to a calling instruction (JNI call) and transmits a display request to an interface design client (surface composer client object);
s360: the interface design client modifies a flag bit of a display area (DisplayState) based on the display request.
Referring to fig. 5, at the local service unit side, the Native side responds to the JNI call from the Java side, and continues to transmit a request for setting a limited frame rate/fetching a specific Surface key to the Surface composclient object, which is a proxy object of the Surface flinger at the client side, and when the Surface composclient receives the request for setting the limited frame rate/fetching the specific Surface key, modifies a flag bit in a corresponding DisplayState, where the DisplayState finally affects the DisplayState held by the Surface flinger.
S400: a screen projection unit in communication connection with a system server receives the modification instruction of the zone bit and gives a name to limit the frame rate to a display device unit;
in step S400, power consumption is to be reduced in a projection unit (surface flicker). Specifically, step S400 includes:
further, step S400 further includes:
s410: a screen projection unit connected with the interface design client receives the modification instruction of the zone bit and gives a name to limit the frame rate to a display equipment unit;
s420: when the screen projection unit processes the refresh command, the refresh state is controlled by the limited frame rate name of the display device unit.
Referring to fig. 6, it is considered that the surface flinger has two main types of events, one is invalid and the other is REFRESH. Therefore, when the surfacomposition completes the modification of the identification bit of the DisplayState, and the surfaflinger processes the invalid event, the frame rate/Surface name set in the DisplayState is assigned to the DisplayDevice object. When the Surface flunger is processing the REFRESH command, it will control whether to REFRESH/synthesize through the frame rate/Surface name in the DisplayDevice. Through the configuration, when the Surface flunger continuously processes the REFRESH command, the frame rate control/specific Surface capture function is achieved, and therefore the purpose of reducing power consumption can be achieved by reducing the frame rate/reducing the synthesized Surface.
S500: display device unit displays interface of application program based on limited frame rate
Finally, the interactive interface synthesized based on the frame rate reduction and/or the layer reduction can reduce the refresh rate and content of the screen projection display, thereby reducing the power required by screen projection.
Referring to fig. 2, a screen recording system applied in an intelligent terminal is shown, and the screen recording system includes a virtual display unit, a display management unit, a system server and a screen projection unit; the virtual display unit is in communication connection with the application program to be recorded; the display management unit which is in communication connection with the virtual display unit generates a display request, wherein the display request comprises a limited frame rate and/or keywords; a system server end which is in communication connection with the display management unit receives the display request and modifies the zone bit in the display area based on the display request; a screen projection unit in communication connection with a system server receives the modification instruction of the zone bit and gives a name to limit the frame rate to a display device unit; the display device unit displays an interface of an application program based on the defined frame rate.
In a preferred or optional embodiment, an application program to be recorded receives a screen recording request; reflecting the application program interface setting display request of the application program of the virtual display unit; and the virtual display unit calls the display management unit to switch the application process of the application program to the process of the system server.
In a preferred or optional embodiment, the display management server in the system server receives a display request from the display management unit; the display management server sends traversing requests for traversing all currently running virtual display units to interface control units in the virtual display units; the interface control unit traverses the virtual display unit based on the traversal request to check whether a screen recording request for capturing the interface of the application program exists; when the virtual display unit with the screen recording request for capturing the interface of the application program is found, the interface control unit issues a calling instruction to the local service unit; the local service unit responds to the call instruction and transmits a display request to an interface design client; the interface design client modifies the flag of the display area based on the display request.
In a preferred or optional embodiment, a screen projection unit connected with an interface design client receives a modification instruction of a zone bit and gives a name to limit a frame rate to a display equipment unit; when the screen projection unit processes the refresh command, the refresh state is controlled by the limited frame rate name of the display device unit.
The invention also shows a computer-readable storage medium having stored thereon a computer program which, when being executed by a processor, carries out the steps as described above.
The smart terminal may be implemented in various forms. For example, the terminal described in the present invention may include an intelligent terminal such as a mobile phone, a smart phone, a notebook computer, a PDA (personal digital assistant), a PAD (tablet computer), a PMP (portable multimedia player), a navigation device, etc., and a fixed terminal such as a digital TV, a desktop computer, etc. In the following, it is assumed that the terminal is a smart terminal. However, it will be understood by those skilled in the art that the configuration according to the embodiment of the present invention can be applied to a fixed type terminal in addition to elements particularly used for moving purposes.
It should be noted that the embodiments of the present invention have been described in terms of preferred embodiments, and not by way of limitation, and that those skilled in the art can make modifications and variations of the embodiments described above without departing from the spirit of the invention.
Claims (10)
1. A screen recording method applied to an intelligent terminal is characterized by comprising the following steps:
creating a virtual display unit and connecting the virtual display unit with an application program to be recorded in a communication manner;
a display management unit which is in communication connection with the virtual display unit generates a display request, wherein the display request comprises a limited frame rate and/or keywords;
a system server end in communication connection with the display management unit receives the display request and modifies the zone bit in the display area based on the display request;
a screen projection unit in communication connection with a system server receives the modification instruction of the zone bit and gives a name to limit the frame rate to a display equipment unit;
the display device unit displays an interface of the application program based on the defined frame rate.
2. The screen recording method of claim 1,
the step of generating a display request by a display management unit in communication connection with a virtual display unit, the display request including a defined frame rate and/or keywords comprises:
receiving a screen recording request by an application program to be recorded;
setting a display request through an application program interface of an application program reflected to the virtual display unit;
and calling the display management unit through the virtual display unit, and switching the application process of the application program to the process of the system server.
3. The screen recording method of claim 2,
the system server end connected with the display management unit in a communication mode receives the display request, and the step of modifying the zone bit in the display area based on the display request comprises the following steps:
a display management server in the system server receives a display request from a display management unit;
the method comprises the steps that a display management server side sends traversing requests for traversing all currently running virtual display units to an interface control unit in each virtual display unit;
the interface control unit traverses the virtual display unit based on the traversal request to check whether a screen recording request for capturing an interface of the application program exists;
and when the virtual display unit with the screen recording request of the interface of the capturing application program is found, sending a calling instruction to the local service unit.
4. The screen recording method of claim 3,
the step of receiving the display request by a system server end in communication connection with the display management unit and modifying the flag bit in the display area based on the display request further comprises the following steps:
the local service unit responds to the calling instruction and transmits the display request to an interface design client;
and the interface design client modifies the zone bit of the display area based on the display request.
5. The screen recording method of claim 4,
the screen projection unit which is in communication connection with the system server receives the modification instruction of the zone bit, and gives names to limit the frame rate to the display equipment unit, and the steps comprise:
a screen projection unit connected with the interface design client receives the modification instruction of the zone bit and gives a name to limit the frame rate to a display equipment unit;
when the screen projection unit processes the refresh command, the refresh state is controlled by the limited frame rate name of the display device unit.
6. A screen recording system applied to an intelligent terminal is characterized by comprising a virtual display unit, a display management unit, a system server and a screen projection unit;
the virtual display unit is in communication connection with the application program to be recorded;
a display management unit which is in communication connection with the virtual display unit generates a display request, wherein the display request comprises a limited frame rate and/or keywords;
a system server end in communication connection with the display management unit receives the display request and modifies the zone bit in the display area based on the display request;
a screen projection unit in communication connection with a system server receives the modification instruction of the zone bit and gives a name to limit the frame rate to a display equipment unit;
the display device unit displays an interface of the application program based on the defined frame rate.
7. The screen recording system of claim 6,
receiving a screen recording request by an application program to be recorded;
reflecting an application program interface setting display request of an application program of the virtual display unit;
and the virtual display unit calls the display management unit to switch the application process of the application program to the process of the system server.
8. The screen recording system of claim 7,
a display management server in the system server receives a display request from a display management unit;
the method comprises the steps that a display management server side sends traversing requests for traversing all currently running virtual display units to an interface control unit in each virtual display unit;
the interface control unit traverses the virtual display unit based on the traversal request to check whether a screen recording request for capturing an interface of the application program exists;
when the virtual display unit with the screen recording request for capturing the interface of the application program is found, the interface control unit issues a calling instruction to the local service unit;
the local service unit responds to the calling instruction and transmits the display request to an interface design client;
and the interface design client modifies the zone bit of the display area based on the display request.
9. The screen recording system of claim 8,
a screen projection unit connected with the interface design client receives the modification instruction of the zone bit and gives a name to limit the frame rate to a display equipment unit;
when the screen projection unit processes the refresh command, the refresh state is controlled by the limited frame rate name of the display device unit.
10. A computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of any of claims 1-5.
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| 《码农家园》: "Android 10 (Android Q)中的屏幕刷新率(display refresh rate)切换方法和策略", 《码农家园》 * |
| SIMON.MIAO: "Android R Variable Refresh Rate 可变帧率研究", 《知乎》 * |
| SIMOWCE: "你有没有想过，录屏软件是怎么获取到屏幕内容的？", 《稀土掘金》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113784075A (en) * | 2021-09-28 | 2021-12-10 | 统信软件技术有限公司 | Screen video reading method and system and computing device |
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