CN112804410A - Multi-display-screen synchronous display method and device, video processing equipment and storage medium - Google Patents
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Abstract
The embodiment of the invention discloses a multi-display-screen synchronous display method and device, video processing equipment and a computer readable medium. The multi-display screen synchronous display method comprises the following steps: acquiring a video to be displayed; decoding the video to be displayed to obtain a decoded video; storing the decoded video to a shared memory to obtain a shared video; respectively reading the shared video from the shared memory through a plurality of display control processes; and synchronously outputting the read shared videos to a plurality of display screens corresponding to the display control processes one by one for display through the display control processes. The embodiment of the invention can realize the synchronous display of multiple display screens of the video under the embedded platform.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a multi-display-screen synchronous display method, a multi-display-screen synchronous display apparatus, a video processing device, and a computer readable medium.
Background
At present, many open-source video playing frameworks such as vlc (video LAN client), gstreamer, mpv (Model-View-Presenter) and the like cannot directly realize multi-display screen synchronous display of videos. In addition, the playing frames are applied to the embedded platform display and have the defects of high CPU occupation rate, poor playing effect and the like.
Disclosure of Invention
The embodiment of the invention provides a multi-display-screen synchronous display method, a multi-display-screen synchronous display device, video processing equipment and a computer readable medium, which are used for realizing multi-display-screen synchronous display of videos under an embedded platform.
On one hand, the multi-display screen synchronous display method provided by the embodiment of the invention comprises the following steps: acquiring a video to be displayed; decoding the video to be displayed to obtain a decoded video; storing the decoded video to a shared memory to obtain a shared video; respectively reading the shared video from the shared memory through a plurality of display control processes; and outputting the read shared videos to a plurality of display screens corresponding to the display control processes one by one for display through the display control processes.
According to the embodiment of the invention, the decoded video is copied from the shared memory through the plurality of display control processes and is synchronously output to the plurality of display screens for display, so that the multi-display-screen synchronous display of the video under the embedded platform is realized, the video display effect of the embedded platform is improved, and the user experience is improved.
In an embodiment of the present invention, the outputting, by the plurality of display control processes, the shared video read respectively to a plurality of display screens corresponding to the plurality of display control processes one to one for displaying specifically includes: and respectively caching and synchronously outputting the read shared video to a plurality of display screens corresponding to the display control processes one by one in a ping-pong operation mode through the display control processes.
According to the embodiment of the invention, the read shared video is cached and synchronously output in a ping-pong operation mode, the problem of picture blockage or tearing caused by insufficient preparation of video frame data is avoided, and the display effect is improved.
In an embodiment of the present invention, the multiple display control processes include a main display control process, and the method for synchronously displaying multiple display screens further includes: and generating a man-machine interaction interface on a target display screen corresponding to the main display control process in the plurality of display screens through the main display control process so as to allow a user to play and control the video to be displayed.
In an embodiment of the present invention, the multi-display synchronous display method further includes: and reading the decoded video and synchronously outputting the decoded video when the plurality of display control processes synchronously output the shared video which is read respectively.
On the other hand, the multi-display synchronous display device provided by the embodiment of the invention comprises: the video acquisition module is used for acquiring a video to be displayed; the video decoding module is used for decoding the video to be displayed to obtain a decoded video; the video storage module is used for storing the decoded video to a shared memory to obtain a shared video; the video sharing module is used for respectively reading the shared video from the shared memory through a plurality of display control processes; and the synchronous display module is used for synchronously outputting the read shared video to a plurality of display screens which are in one-to-one correspondence with the display control processes for display through the display control processes.
In an embodiment of the present invention, the synchronous display module is specifically configured to: and respectively caching and synchronously outputting the read shared video to a plurality of display screens corresponding to the display control processes one by one in a ping-pong operation mode through the display control processes.
In one embodiment of the present invention, the plurality of display control processes include a main display control process, and the multi-display screen synchronous display apparatus further includes: and the interactive interface generating module is used for generating a human-computer interactive interface on a target display screen corresponding to the main display control process in the plurality of display screens through the main display control process so as to allow a user to play and control the video to be displayed.
In one embodiment of the present invention, the multi-display synchronous display apparatus further comprises: and the decoded video display module is used for reading the decoded video and synchronously outputting the decoded video when the plurality of display control processes synchronously output the read shared video.
In another aspect, an embodiment of the present invention provides a video processing apparatus, including: the multi-display screen synchronous display device comprises a memory and a processor connected with the memory, wherein the memory stores a computer program, and the processor executes the multi-display screen synchronous display method when running the computer program.
In another aspect, an embodiment of the present invention provides a computer-readable medium, which is a non-volatile memory and stores computer-executable instructions, where the computer-executable instructions are used to execute any one of the foregoing multi-display screen synchronous display methods.
One or more of the above technical solutions may have the following advantages or beneficial effects: the decoded video is copied from the shared memory through the display control processes and is synchronously output to the display screens for displaying, so that the multi-display-screen synchronous display of the video under the embedded platform is realized, the video display effect of the embedded platform is improved, and the user experience is improved. In addition, when the video is output, the video after ping-pong operation caching and copying output avoids the problem of picture blocking or tearing caused by insufficient preparation of video frame data, and improves the display effect. Furthermore, the embodiment of the invention generates the UI interface on the display screen through the main display control process, so that a user can conveniently and friendly realize the control of the embedded video processing equipment through the display screen. And moreover, the cached decoded video is directly read, and the decoded video is synchronously output when the shared video read by the plurality of display control processes is synchronously output, so that the shared video and the decoded video are synchronously displayed on a plurality of display screens, and under the condition of synchronous display of the same number of display screens, the system resources can be saved, and the efficiency and the system response real-time property are improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a flowchart illustrating a multi-display screen synchronous display method according to a first embodiment of the present invention.
FIG. 2 is a schematic structural diagram of a hardware architecture for implementing a multi-display synchronous display method according to a first embodiment of the present invention.
Fig. 3 is a schematic diagram illustrating changes of videos to be displayed in the implementation process of the multi-display-screen synchronous display method according to the first embodiment of the present invention.
FIG. 4 is a schematic diagram illustrating another variation of a video to be displayed in the implementation process of the multi-display-screen synchronous display method according to the first embodiment of the present invention.
Fig. 5 is a schematic diagram illustrating a further variation of a video to be displayed in the implementation process of the multi-display-screen synchronous display method according to the first embodiment of the present invention.
Fig. 6 is a schematic block diagram of a multi-display synchronous display device according to a second embodiment of the present invention.
Fig. 7 is a schematic structural diagram of a video processing apparatus according to a third embodiment of the present invention.
Fig. 8 is a schematic structural diagram of a computer-readable medium according to a fourth embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
[ first embodiment ] A method for manufacturing a semiconductor device
As shown in fig. 1, a first embodiment of the present invention provides a multi-display synchronous display method, which is suitable for multi-display synchronous display of videos under an embedded platform. Specifically, the multi-display screen synchronous display method provided by the embodiment of the present invention includes, for example, the steps of:
s11: acquiring a video to be displayed;
s13: decoding the video to be displayed to obtain a decoded video;
s15: storing the decoded video to a shared memory to obtain a shared video;
s17: respectively reading the shared video from the shared memory through a plurality of display control processes; and
s19: and synchronously outputting the read shared videos to a plurality of display screens corresponding to the display control processes one by one for display through the display control processes.
In order to facilitate understanding of the present invention, the steps of the multi-display synchronous display method of the present embodiment will be described in detail with reference to fig. 2 to 5.
The multi-display screen synchronous display method provided by the embodiment of the invention can be realized by an embedded processor of an embedded device. Here an embedded device such as an embedded video processing device. For example, as shown in fig. 2, the embedded video processing device may be connected with a plurality of display screens, for example, through a video interface such as an HDMI interface, an LVDS interface. The display screen may be, for example, an LED display screen, or may also be other display screens such as an LCD, and the invention is not limited thereto. An embedded video processing device includes, for example, an embedded processor and a programmable logic device coupled to the embedded processor. The Programmable logic device is, for example, an FPGA (Field-Programmable Gate Array), and is configured to process an input video source and output processed video data to a subsequent device, such as a display control card and a display device. In addition, the embedded device also comprises a shared memory connected with the embedded processor. The shared memory here is, for example, a volatile memory such as DDR or other memory. The shared memory may be a memory space in the volatile memory, which is configured to be accessed by a plurality of processes, or may be a volatile memory separately connected to the embedded processor. The embedded processor is provided with an embedded system such as Linux, and application software such as multi-display synchronous display software can be installed on the embedded processor. The multi-display screen synchronous display software can realize the multi-display screen synchronous display method provided by the embodiment of the invention through a plurality of processes, and the specific process is as follows.
First, as shown in fig. 3, the multi-display synchronous display software acquires a video to be displayed. The video to be displayed can be the video stored in the embedded video processing device, and also can be the video outside the embedded video processing device, such as the video in the nonvolatile memory connected with the embedded video processing device. The multi-display screen synchronous display software can automatically acquire the video to be displayed or respond to the operation instruction of a user to select and acquire the video to be displayed.
And secondly, decoding the selected video to be displayed by the multi-display-screen synchronous display software to obtain the decoded video. In particular, the multi-display screen synchronous display software can implement frame-by-frame decoding of the video to be displayed, for example, based on an open source Ffmmpeg frame. The format of the video to be displayed here may be, for example, H264, H265, or the like. In addition, for different embedded processing chips, the multi-display screen synchronous display software can also call a corresponding hardware decoding library to decode the video to be displayed, so that the decoding efficiency can be greatly improved, and the CPU occupation rate is reduced. Specifically, the multi-display screen synchronous display software decodes each video frame of the video to be displayed into video frame data in a YUV format through FFMPEG and buffers the frame video frame.
Then, the multi-display screen synchronous display software stores the decoded video to a shared memory to obtain a shared video. Here, shared memory is volatile storage that can be accessed by multiple processes simultaneously. For example, the size of each frame of decoded video to be displayed with a common 1080p resolution is about 3MB, and the decoded video can be stored in the shared memory for display at one time, so that the efficiency is high. Of course, the multi-display synchronous display software may store one or more frames in the shared memory.
And then, the multi-display screen synchronous display software reads the shared video from the shared memory. Specifically, the multi-display screen synchronous display software reads the shared video from the shared memory through a plurality of display control processes respectively and simultaneously, for example, automatically or in response to a user operation instruction. For example, the multi-display synchronous display software creates a plurality of display control processes according to the number of the display screens. The number of display control processes may be equal to the number of display screens, or of course may not be equal to the number of display screens. The multi-display screen synchronous display software responds to user operation, for example, a synchronous display button on a control panel of the embedded video processing device is triggered, the multi-display screen synchronous display software stores the acquired user operation instruction information into a shared memory, and the plurality of display control processes synchronously acquire the user operation instruction information through the shared memory and can respectively read the shared video from the shared memory according to the acquired user operation instruction information. Furthermore, the plurality of display control processes can simultaneously and respectively read the shared video from the shared memory, so that the video reading time can be further shortened, and the response speed of the system can be improved.
And finally, synchronously outputting the respectively read shared videos to a plurality of display screens in one-to-one correspondence through a plurality of display control processes by the multi-display-screen synchronous display software so as to display the videos on the plurality of display screens. Therefore, the multi-display screen synchronous display of the video on the embedded platform is completed. It is worth mentioning here that the steps S11, S13, S15 may be performed by one or more processes of the multi-display screen simultaneous display software other than the plurality of display control processes.
Further, when outputting the respective read shared videos, the multi-display-screen synchronous display software may respectively buffer and synchronously output the respective read video frames of the shared videos to the plurality of display screens in a one-to-one correspondence manner, for example, in a ping-pong operation manner through the plurality of display control processes. Specifically, as shown in fig. 4, taking a display control process as an example, after a display control process reads a shared video 110 from a shared memory, a first frame of video frame of the read shared video 110 is stored in a buffer 310 in a first period, a second frame of video frame is stored in a buffer 320 in a second period, and the first frame of video frame in the buffer 310 is output to the display screen 210 for display at the same time, a third frame of video frame is stored in the buffer 310 in a third period, and the second frame of video frame in the buffer 320 is output to the display screen 210 for display, so that the read shared video 210 is alternately buffered and output to the display screen 120. And each display control process carries out real-time communication through the shared memory and synchronously outputs and renders a plurality of read videos. The multi-display screen synchronous display software adopts a DRM (Direct Rendering Manager) display frame independent of an X11 desktop system under linux, makes full use of DRM and double-buffer mechanisms, such as displaying the read shared video in a ping-pong operation mode of caching one frame and outputting and Rendering one frame, and avoids the phenomenon that the video display picture is torn and jammed due to untimely preparation of video frame data of the read shared video.
Further, the plurality of display control processes may, for example, include a master display control process. Illustratively, the main display process here is a display control process that can receive user operation instructions, and then the user operation instructions are stored in the shared memory to share the user operation instructions. And the multi-display-screen synchronous display software generates a human-computer interaction interface (UI) on a target display screen corresponding to the main display control process in the plurality of display screens through the main display control process, for example, the QopenGL in the QT frame is adopted for rendering and displaying, so that a user can play and control the video to be displayed. Therefore, a user can conveniently and friendly realize the control of the embedded video processing equipment, such as fast forward, fast backward, pause and the like, through the UI interface generated by the main display control process. In addition, the multi-display screen synchronous display software responds to the user operation instruction through the main display control process and transmits the user operation instruction information through the shared memory so as to be acquired by other display control processes (also called as auxiliary display control processes) in the multiple display control processes, so that the purpose of synchronous display and control of the multiple display control processes is achieved. The auxiliary display control process uses EGL (Embedded Graphics Interface) to store the cached frame video data into a video memory, and uses GPU (Graphics Processing Unit) to render and display, so as to reduce the resource overhead of CPU, perform video display efficiently, and improve the real-time performance and efficiency of system response. It should be noted that the aforementioned step S11 can be completed by the main display control process to save system resources. Of course, this may be accomplished by other processes besides a plurality of display control processes.
In addition, in other embodiments of the present invention, as shown in fig. 5, the multi-display-screen synchronous display software may also directly read the cached decoded video, and synchronously output the decoded video to the corresponding display screen when the plurality of display control processes synchronously output the respective read shared video, so that the read shared video and the decoded video are synchronously displayed on the plurality of display screens. The process of performing this step is the same process as the process of performing steps S13 and S15. Therefore, system resources can be saved, and the efficiency and the system response real-time performance are improved. Further, the process of performing this step may also be the same as the process of performing step S11 to further save system resources.
In summary, in the embodiments of the present invention, the video to be displayed is decoded and stored in the shared memory, and then the shared video in the shared memory is read and synchronously output to the plurality of display screens, so that multi-screen synchronous display under the embedded platform is implemented, and display diversity and user experience are improved. In addition, when the video is output, the DRM and double-buffer mechanisms such as a ping-pong operation mode are adopted to buffer and output the shared video read by the plurality of display control processes from the shared memory, so that the problem of picture blockage or tearing caused by insufficient preparation of video frame data is avoided, and the display effect is improved. Furthermore, the embodiment of the invention generates the UI interface on the corresponding display screen by adopting the QopenGL rendering technology under the QT framework through the main display control process, so that a user can conveniently and friendly realize the control of the embedded video processing equipment through the display screen. And moreover, the cached decoded video is directly read, and the decoded video is synchronously output when the shared video read by each display control process is synchronously output by the plurality of display control processes, so that the shared video read by each display control process and the decoded video are synchronously displayed on the plurality of display screens, and under the condition of synchronous display of the same number of display screens, the system resources can be saved, and the efficiency and the system response real-time property are improved.
[ second embodiment ]
As shown in fig. 6, a multi-display synchronous display apparatus 400 according to a second embodiment of the present invention is provided. The multi-display screen synchronous display device 400 includes, for example, a video acquisition module 410, a video decoding module 420, a video storage module 430, a video sharing module 440, and a synchronous display module 450.
The video obtaining module 410 is used for obtaining a video to be displayed.
The video decoding module 420 is configured to decode the video to be displayed to obtain a decoded video.
The video storage module 430 is configured to store the decoded video to a shared memory.
The video sharing module 440 is configured to read the shared video from the shared memory through a plurality of display control processes.
The synchronous display module 450 is configured to output the shared video read by the plurality of display control processes to a plurality of display screens corresponding to the plurality of display control processes one to one for display. Specifically, the synchronous display module 450 is configured to respectively buffer and synchronously output the shared video read by the plurality of display control processes to a plurality of display screens corresponding to the plurality of display control processes one to one in a ping-pong operation manner.
Further, the multi-display synchronous display apparatus 400 may further include an interactive interface generating module (not shown in the drawings). And the interactive interface generating module is used for generating a human-computer interactive interface on a target display screen corresponding to the main display control process in the plurality of display screens through the main display control process so as to be used for a user to play and control the video to be displayed.
Further, the multi-screen synchronous display device 400 may further include a decoded video display module (not shown in the figure). The decoded video display module is used for reading the decoded video and synchronously outputting the decoded video when the plurality of display control processes synchronously output the read shared video.
For the specific working process and technical effects among the modules in the multi-display screen synchronous display device 400 in this embodiment, reference is made to the description of the first embodiment, and details are not repeated here.
[ third embodiment ]
As shown in fig. 7, a third embodiment of the present invention provides a video processing apparatus 500. Typically, the video processing device 500 may be, for example, a video processor, a video splicer, or the like having video and image processing capabilities. The video processing device 500 comprises, for example, a memory 510 and a processor 530 coupled to the memory 510. The memory 510 may be, for example, a non-volatile memory having stored thereon a computer program 511. Processor 530 may be, for example, an embedded processor. The processor 530, when running the computer program 511, performs the multi-display synchronous display method in the aforementioned first embodiment.
The specific operation and technical effects of the video processing apparatus 500 in the present embodiment are described with reference to the foregoing first embodiment.
[ fourth example ] A
As shown in fig. 8, a fourth embodiment of the present invention provides a storage medium, such as a computer-readable medium 600. The computer-readable medium 600 is, for example, a non-volatile memory, such as: magnetic media (e.g., hard disks, floppy disks, and magnetic tape), optical media (e.g., CDROM disks and DVDs), magneto-optical media (e.g., optical disks), and hardware devices specially constructed for storing and executing computer-executable instructions (e.g., Read Only Memories (ROMs), Random Access Memories (RAMs), flash memories, etc.). Computer-readable medium 600 has stored thereon computer-executable instructions 610. The computer-readable medium 600 may be executed by one or more processors or processing devices to execute the computer-executable instructions 610 to implement the multi-display synchronous display method in the foregoing first embodiment.
In addition, it should be understood that the foregoing embodiments are merely exemplary illustrations of the present invention, and the technical solutions of the embodiments can be arbitrarily combined and collocated without conflict between technical features and structural contradictions, which do not violate the purpose of the present invention.
In the embodiments provided in the present invention, it should be understood that the disclosed system, apparatus and method may be implemented in other ways. For example, the above-described embodiments of the apparatus are merely illustrative, and for example, a division of a unit is merely a division of one logic function, and an actual implementation may have another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may also be distributed on multiple network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A multi-display screen synchronous display method is characterized by comprising the following steps:
acquiring a video to be displayed;
decoding the video to be displayed to obtain a decoded video;
storing the decoded video to a shared memory to obtain a shared video;
respectively reading the shared video from the shared memory through a plurality of display control processes; and
and synchronously outputting the read shared videos to a plurality of display screens corresponding to the display control processes one by one for display through the display control processes.
2. The multi-display-screen synchronous display method according to claim 1, wherein the synchronously outputting the respectively read shared video to a plurality of display screens corresponding to the plurality of display control processes one to one for displaying by the plurality of display control processes specifically comprises:
and respectively caching and synchronously outputting the read shared video to a plurality of display screens corresponding to the display control processes one by one in a ping-pong operation mode through the display control processes.
3. The multi-display synchronous display method of claim 1, wherein the plurality of display control processes include a main display control process, the multi-display synchronous display method further comprising:
and generating a man-machine interaction interface on a target display screen corresponding to the main display control process in the plurality of display screens through the main display control process so as to allow a user to play and control the video to be displayed.
4. The multi-display synchronous display method of claim 1, further comprising:
and reading the decoded video, and synchronously outputting the decoded video when the plurality of display control processes output the respectively read shared video.
5. A multi-display synchronous display device, comprising:
the video acquisition module is used for acquiring a video to be displayed;
the video decoding module is used for decoding the video to be displayed to obtain a decoded video;
the video storage module is used for storing the decoded video to a shared memory to obtain a shared video;
the video sharing module is used for respectively reading the shared video from the shared memory through a plurality of display control processes; and
and the synchronous display module is used for outputting the read shared videos to a plurality of display screens which are in one-to-one correspondence with the display control processes through the display control processes for display.
6. The multi-display synchronous display device of claim 5, wherein the synchronous display module is specifically configured to:
and respectively caching and synchronously outputting the read shared video to a plurality of display screens corresponding to the display control processes one by one in a ping-pong operation mode through the display control processes.
7. The multi-display synchronous display device of claim 5, wherein the plurality of display control processes include a main display control process, the multi-display synchronous display device further comprising:
and the interactive interface generating module is used for generating a human-computer interactive interface on a target display screen corresponding to the main display control process in the plurality of display screens through the main display control process so as to allow a user to play and control the video to be displayed.
8. The multi-display synchronous display device of claim 5, further comprising:
and the decoded video display module is used for reading the decoded video and synchronously outputting the decoded video to a corresponding display screen when the plurality of display control processes synchronously output the read shared video.
9. A video processing apparatus, comprising: a memory and a processor connected to the memory, the memory storing a computer program, the processor executing the computer program to perform the multi-display synchronous display method according to any one of claims 1 to 4.
10. A computer-readable medium which is a non-volatile memory and stores computer-executable instructions for performing the multi-display synchronous display method according to any one of claims 1 to 4.
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| CN114489888A (en) * | 2022-01-10 | 2022-05-13 | 麒麟软件有限公司 | Method for sharing Linux system screen data by Android application based on DRM |
| CN114727070A (en) * | 2022-05-10 | 2022-07-08 | 中科院广州电子技术有限公司 | Camera real-time video data processing method and device |
| CN116366900A (en) * | 2023-04-13 | 2023-06-30 | 北京优酷科技有限公司 | Synchronous display method, synchronous display device, terminal and computer storage medium |
| CN117742863A (en) * | 2023-12-19 | 2024-03-22 | 广州创龙电子科技有限公司 | Multimedia processing method and system based on Qt and GSstreamer combination |
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| CN114489888A (en) * | 2022-01-10 | 2022-05-13 | 麒麟软件有限公司 | Method for sharing Linux system screen data by Android application based on DRM |
| CN114489888B (en) * | 2022-01-10 | 2023-08-04 | 麒麟软件有限公司 | Method for Android application to share Linux system screen data based on DRM |
| CN114727070A (en) * | 2022-05-10 | 2022-07-08 | 中科院广州电子技术有限公司 | Camera real-time video data processing method and device |
| CN116366900A (en) * | 2023-04-13 | 2023-06-30 | 北京优酷科技有限公司 | Synchronous display method, synchronous display device, terminal and computer storage medium |
| CN116366900B (en) * | 2023-04-13 | 2024-03-19 | 神力视界(深圳)文化科技有限公司 | Synchronous display method, device, terminal, system, medium and program product |
| CN117742863A (en) * | 2023-12-19 | 2024-03-22 | 广州创龙电子科技有限公司 | Multimedia processing method and system based on Qt and GSstreamer combination |
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