CN113873206B - Multi-channel video recording method and system - Google Patents
Multi-channel video recording method and system Download PDFInfo
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- CN113873206B CN113873206B CN202111278429.3A CN202111278429A CN113873206B CN 113873206 B CN113873206 B CN 113873206B CN 202111278429 A CN202111278429 A CN 202111278429A CN 113873206 B CN113873206 B CN 113873206B
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- 238000000034 method Methods 0.000 title claims abstract description 38
- 238000012544 monitoring process Methods 0.000 claims abstract description 38
- 238000012545 processing Methods 0.000 claims abstract description 9
- 238000004806 packaging method and process Methods 0.000 claims description 5
- 230000002194 synthesizing effect Effects 0.000 claims 2
- 230000015572 biosynthetic process Effects 0.000 abstract description 3
- 238000003786 synthesis reaction Methods 0.000 abstract description 3
- 230000004044 response Effects 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
- H04N7/181—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast for receiving images from a plurality of remote sources
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/222—Studio circuitry; Studio devices; Studio equipment
- H04N5/262—Studio circuits, e.g. for mixing, switching-over, change of character of image, other special effects ; Cameras specially adapted for the electronic generation of special effects
- H04N5/265—Mixing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
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- Engineering & Computer Science (AREA)
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- Signal Processing (AREA)
- Closed-Circuit Television Systems (AREA)
- Television Signal Processing For Recording (AREA)
Abstract
The invention provides a monitoring method and a system based on multi-channel video recording, wherein the method comprises the following steps: configuring layers of a display, and establishing an association relation between each layer and a camera; acquiring image information shot by a plurality of cameras; transmitting the image information to a corresponding layer in the display for display according to the association relation respectively so as to obtain display information of the display; storing the display information by adopting a display engine; processing the stored display information to obtain a media file; and writing the media file into a storage module. The monitoring method only needs to generate one media file, does not generate a plurality of media files, avoids the problem of multi-path writing, does not need to rely on other special hardware modules, can synthesize a plurality of paths of video streams into one path of video stream only by utilizing a display engine hardware synthesis technology, realizes simultaneous recording of a plurality of paths of videos, and solves the problem of concurrency caused by multi-path writing.
Description
Technical Field
The invention belongs to the technical field of video recording, and particularly relates to a multi-channel video recording method and system.
Background
With the development of consumer electronics, monitoring systems are becoming more popular. The existing monitoring system needs to be connected with a plurality of cameras to cover the whole monitoring area, each camera can generate a corresponding media file in the monitoring process, the media files are usually obtained by independently encoding and packaging the content recorded by each camera, for example, the recorded file corresponding to the camera A at the moment of 19 minutes and 40 seconds of 19 days of 5 months and 20 days of 2020 is 20200520_190740A.ts, and the recorded file corresponding to the camera B is 20200520_1900AB.ts. However, existing monitoring systems suffer from the following drawbacks:
1) The memory module is subjected to the pressure of multi-path writing, the requirement on the memory module is high, and when a plurality of memory modules are subjected to multi-path writing, compared with the case of single-path writing, the writing speed is obviously attenuated, and the data loss caused by untimely writing is easy to occur.
2) When the monitoring content is played back, if the content at a certain moment needs to be searched, the media files corresponding to the cameras need to be checked one by one, and the operation is complex.
3) The player cannot be supported to play multiple media files synchronously.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a multi-channel video recording method and a multi-channel video recording system, which overcome the problem of frame loss caused by multi-channel writing.
In a first aspect, a monitoring method based on multi-channel video recording includes the steps of:
configuring layers of a display, and establishing an association relation between each layer and a camera;
Acquiring image information shot by a plurality of cameras;
Transmitting the image information to a corresponding layer in the display for display according to the association relation respectively so as to obtain display information of the display;
Storing display information by adopting a display engine;
Processing the stored display information to obtain a media file;
the media file is written to the storage module.
Preferably, the display areas of the different layers in the display do not overlap.
Preferably, the size of the layer is equal to or larger than the size of the image information.
Preferably, processing the stored display information specifically includes:
The stored display information is encoded and encapsulated.
Preferably, after writing the media file to the storage module, the method further comprises:
when a playback instruction is received, retrieving the media file stored in the storage module according to the playback instruction;
and transmitting the media file to a display, so that the display displays the media file by using different layers according to the association relation.
In a second aspect, a monitoring system based on multi-channel video recording, comprising:
a camera head: the method is used for obtaining image information after shooting;
A display: the method comprises the steps of receiving configuration instructions, configuring layers and establishing an association relation between each layer and a camera; displaying the image information by using different layers to obtain display information;
display engine: is connected with the display; the display engine is used for storing display information;
and a storage module: for writing media files;
And the control module is used for: the display engine is connected with the camera, the display and the storage module; the control module is used for transmitting the image information to the corresponding layers in the display according to the association relation respectively; the control module is also used for reading the display information stored by the display engine, processing the display information to obtain the media file, and transmitting the media file to the storage module.
Preferably, the display areas of the different layers in the display do not overlap.
Preferably, the size of the layer is equal to or larger than the size of the image information.
Preferably, the control module is specifically configured to:
And encoding and packaging the stored display information to obtain the media file.
Preferably, the control module is further configured to:
when a playback instruction is received, retrieving the media file stored in the storage module according to the playback instruction;
transmitting the media file to a display;
the display is also used for displaying the media files by using different layers according to the association relation.
According to the technical scheme, the multi-path video recording method and the multi-path video recording system are capable of integrating the multi-path video streams into one path of video stream by utilizing the display engine hardware integration technology, realizing simultaneous recording of the multi-path video, and solving the concurrent problem caused by multi-path writing, wherein the multi-path video stream is integrated into one path of video stream by only generating one media file, and the multi-path writing problem is avoided by generating no multiple media files.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. Like elements or portions are generally identified by like reference numerals throughout the several figures. In the drawings, elements or portions thereof are not necessarily drawn to scale.
Fig. 1 is a flowchart of a monitoring method according to an embodiment.
Fig. 2 is a flow chart of a monitoring method according to an embodiment.
Fig. 3 is a flowchart of a playback method in the monitoring method provided in the embodiment.
Fig. 4 is a block diagram of a monitoring system according to an embodiment.
Detailed Description
Embodiments of the technical scheme of the present application will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present application, and thus are merely examples, and are not intended to limit the scope of the present application. It is noted that unless otherwise indicated, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this application belongs.
It should be understood that the terms "comprises" and "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
It is also to be understood that the terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in this specification 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.
As used in this specification and the appended claims, the term "if" may be interpreted as "when..once" or "in response to a determination" or "in response to detection" depending on the context. Similarly, the phrase "if a determination" or "if a [ described condition or event ] is detected" may be interpreted in the context of meaning "upon determination" or "in response to determination" or "upon detection of a [ described condition or event ]" or "in response to detection of a [ described condition or event ]".
Embodiment one:
a monitoring method based on multi-channel video recording, see fig. 1 and 2, comprising the following steps:
S1: configuring layers of a display, and establishing an association relation between each layer and a camera;
s2: acquiring image information shot by a plurality of cameras;
s3: transmitting the image information to a corresponding layer in the display for display according to the association relation respectively so as to obtain display information of the display;
s4: storing display information by adopting a display engine;
S5: processing the stored display information to obtain a media file;
s6: the media file is written to the storage module.
Specifically, the positions and the number of the cameras are determined according to the monitoring area, if the monitoring area has more dead angles, the cameras are required to be arranged at all dead angles to ensure that the whole monitoring area is monitored, and more cameras are required to be installed at the moment. If the monitoring area is small or relatively clear, the whole monitoring area can be monitored by only installing a small number of cameras. The image information may be video or picture taken by a camera.
The display in the monitoring method may be a multi-layer display. The monitoring method first requires setting the layer and resolution of the display. Assuming that image information of four cameras needs to be acquired, the screen of the display needs to be divided into four screens to display the image information of the four cameras respectively. Assuming that the data resolution of the camera is 1280x720, the resolution of the display is 2560x1440, the display is set to 4 layers, the width and height of each layer are set to 1280 and 720, respectively, and the display region coordinates of the four layers are { x=0, y=0 }, { x=1280, y=0 }, { x=0, y=720 } and { x=1280, y=720 } respectively. x and y are the abscissa and ordinate, respectively, corresponding to the display area.
After the layer configuration of the display is completed, the association relationship between each layer and the camera needs to be configured, for example, the layer A is configured to be associated with the camera A, so that the layer A displays the image information of the camera A. Similarly, the configuration layer B is associated with the camera B, and the configuration layer B displays image information of the camera B.
After the configuration is completed, the monitoring method receives the image information of each camera, and then transmits the image information to the corresponding image layer of the display for display according to the association relation. For example, after the configuration of the association relationship is completed, when the image information of the camera A is received, the image information is transmitted to the layer A of the display for display, so that the image information obtained by shooting all cameras can be transmitted to different layers of the display for display, and the effect of displaying all the image information on the display on the same screen is achieved.
After the split-screen display of the image information is completed, the Display Engine (DE) is adopted to intercept the display information displayed on the display, and the display information can show the data after all the image information is overlapped. The display engine is used for integrating the data of each layer to obtain the data of each layer after superposition. The image composition technique of the display engine may be implemented by a GPU, for example, by stitching by the GPU, which may compose multiple images into one image, thereby composing multiple video streams into one video stream. The GPU may be implemented in an integrated or external manner.
According to the monitoring method, after the synthesis of the image information is completed, the data are processed to generate a media file and the media file is stored, so that the finally obtained media file contains the image information of each camera. The method can also pre-allocate a space according to the size of the media file in a pre-allocation mode on the file system level when the media file is created. Thus, fragments generated after the file system is used for a long time can be reduced.
The monitoring method can be applied to the vehicle-mounted field or the monitoring field, and is mainly applied to the monitoring scene of the multipath cameras. In the existing monitoring system, media files recorded and generated by multiple cameras are independent, and the media files generated in the recording process can be continuously written into a storage module. Because of the continuous upgrading of the product specification, the resolution of the camera is higher and higher, so that the generated media file is larger and larger, and the writing speed requirement on the storage module is higher and higher, the situation that the video data is lost due to blockage easily occurs in the existing monitoring system.
The monitoring method synthesizes multiple paths of video streams and stores the synthesized multiple paths of video streams into one media file, only one media file is needed to be generated, multiple media files are not generated, the problem of multiple paths of writing is avoided, other special hardware modules are not needed to be relied on, the multiple paths of video streams can be synthesized into one path of video stream only by utilizing a display engine hardware synthesis technology, simultaneous recording of multiple paths of video is realized, and the problem of concurrency caused by multiple paths of writing is solved.
Preferably, the display areas of the different layers in the display do not overlap.
Specifically, in order to ensure the integrity of the image information shot by all cameras, the display areas of different layers are not overlapped, so that the display areas of the image information are not overlapped when the display is used for displaying, and the problem of shielding when the image information is displayed is avoided.
Preferably, the size of the layer is equal to or larger than the size of the image information.
Specifically, the monitoring method needs to ensure that the size of the image layer cannot be smaller than the size of the image information, otherwise, the scaling effect can be caused when the image information is displayed, and the definition is reduced. For example, in the above example, assuming that the data resolution of the camera is 1280x720, the size of the obtained image information is 1280x720, and when the size of the layer is set, the size of the layer cannot be smaller than 1280x720.
Preferably, processing the stored display information specifically includes:
The stored display information is encoded and encapsulated.
Specifically, the monitoring method encodes and encapsulates the video stream synthesized by the display engine to generate the media file.
Preferably, after writing the media file to the storage module, referring to fig. 3, further comprising:
S7: when a playback instruction is received, retrieving the media file stored in the storage module according to the playback instruction;
s8: and transmitting the media file to a display, so that the display displays the media file by using different layers according to the association relation.
Specifically, the method can simultaneously view the image information recorded by different cameras when the image information is played back. The playback instruction may be issued by the user, the playback instruction may be a voice message, or a trigger signal that triggers the generation of any switch or button. When the media file to be played back is needed to be played back, the display receives the media file to be played back, and then the media file is played back by using different layers according to the established association relation. The playback mode is simple and visual, synchronous play can be realized, and the compatibility is good. The user does not need to search the file list for the media file of each camera multiple times, nor does the display need to be modified to enable multiple windows to view multiple camera data simultaneously.
Embodiment two:
A monitoring system based on multi-channel video recording, see fig. 4, comprising:
camera 2: the method is used for obtaining image information after shooting;
Display 3: the method comprises the steps of receiving configuration instructions, configuring layers and establishing an association relation between each layer and a camera 2; displaying the image information by using different layers to obtain display information;
display engine 4: is connected with a display 3; the display engine 4 is used for storing display information;
Storage module 1: for writing media files;
Control module 5: is connected with the camera 2, the display 3, the display engine 4 and the storage module 1; the control module 5 is configured to transmit the image information to a corresponding layer in the display 3 according to the association relationship respectively; the control module 5 is further configured to read the display information stored in the display engine 4, process the display information to obtain the media file, and transmit the media file to the storage module 1.
Preferably, the display areas of the different layers in the display 3 do not overlap.
Preferably, the size of the layer is equal to or larger than the size of the image information.
Preferably, the control module 5 is specifically configured to:
And encoding and packaging the stored display information to obtain the media file.
Preferably, the control module 5 is further configured to:
When receiving a playback instruction, retrieving the media file stored in the storage module 1 according to the playback instruction;
Transmitting the media file to the display 3;
the display 3 is further configured to display the media file with different layers according to the association relationship.
For a brief description of the system provided by the embodiments of the present invention, reference may be made to the corresponding content in the foregoing embodiments where the description of the embodiments is not mentioned.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the 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 scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention, and are intended to be included within the scope of the appended claims and description.
Claims (6)
1. The monitoring method based on the multi-channel video recording is characterized by comprising the following steps of:
configuring layers of a display, and establishing an association relation between each layer and a camera;
Acquiring image information shot by a plurality of cameras;
Transmitting the image information to a corresponding layer in the display for display according to the association relation respectively so as to obtain display information of the display;
Storing the display information by adopting a display engine; the display engine is used for synthesizing a plurality of image information into one image information through the GPU to obtain the display information; the GPU is realized in an integrated or external mode;
processing the stored display information to obtain a media file; when the method is used for creating the media file, a pre-allocation mode is adopted on the file system level to pre-allocate a space according to the size of the media file;
writing the media file into a storage module;
The display areas of different layers in the display are not overlapped;
the size of the image layer is larger than or equal to the size of the image information;
When image information of four cameras is acquired, the data resolution of the cameras is 1280x720, the resolution of the display is 2560x1440, the display is set to 4 layers, the width and the height of each layer are respectively set to 1280 and 720, and the display area coordinates of the four layers are { x=0, y=0 }, { x=1280, y=0 }, { x=0, y=720 } and { x=1280, y=720 }; x and y are the abscissa and ordinate, respectively, corresponding to the display area.
2. The method for monitoring and controlling video recording according to claim 1, wherein the processing the stored display information specifically includes:
And encoding and packaging the stored display information.
3. The method of claim 1, further comprising, after writing the media file to a storage module:
When a playback instruction is received, retrieving the media file stored in the storage module according to the playback instruction;
and transmitting the media file to a display, so that the display displays the media file by using different layers according to the association relation.
4. A monitoring system based on multi-channel video recording, comprising:
a camera head: the method is used for obtaining image information after shooting;
A display: the method comprises the steps of receiving configuration instructions, configuring layers and establishing an association relation between each layer and a camera; displaying the image information by using different layers to obtain display information;
Display engine: is connected with the display; the display engine is used for storing the display information; the display engine is used for synthesizing a plurality of image information into one image information through the GPU to obtain the display information; the GPU is realized in an integrated or external mode;
and a storage module: for writing media files;
And the control module is used for: the display engine is connected with the camera, the display and the storage module; the control module is used for transmitting the image information to the corresponding layers in the display according to the association relation respectively; the control module is also used for reading the display information stored by the display engine, processing the display information to obtain the media file and transmitting the media file to the storage module; when a media file is created, a pre-allocation mode is adopted on a file system level to pre-allocate a space according to the size of the media file;
The display areas of different layers in the display are not overlapped;
the size of the image layer is larger than or equal to the size of the image information;
When image information of four cameras is acquired, the data resolution of the cameras is 1280x720, the resolution of the display is 2560x1440, the display is set to 4 layers, the width and the height of each layer are respectively set to 1280 and 720, and the display area coordinates of the four layers are { x=0, y=0 }, { x=1280, y=0 }, { x=0, y=720 } and { x=1280, y=720 }; x and y are the abscissa and ordinate, respectively, corresponding to the display area.
5. The multi-channel video recording-based monitoring system of claim 4, wherein the control module is specifically configured to:
And encoding and packaging the stored display information to obtain the media file.
6. The multi-video recording-based monitoring system of claim 4, wherein the control module is further configured to:
When a playback instruction is received, retrieving the media file stored in the storage module according to the playback instruction;
transmitting the media file to the display;
the display is also used for displaying the media files by using different layers according to the association relation.
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| 一种显示控制器和二维图形处理器通过同一个内存控制器访问内存的架构设计方法;张慧明;秦奎;;中国集成电路;20200605(第Z3期);全文 * |
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| CN113873206A (en) | 2021-12-31 |
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