CN113873206A - Multi-channel video recording method and system - Google Patents
Multi-channel video recording method and system Download PDFInfo
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- CN113873206A CN113873206A CN202111278429.3A CN202111278429A CN113873206A CN 113873206 A CN113873206 A CN 113873206A CN 202111278429 A CN202111278429 A CN 202111278429A CN 113873206 A CN113873206 A CN 113873206A
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- 238000000034 method Methods 0.000 title claims abstract description 36
- 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 6
- 230000015572 biosynthetic process Effects 0.000 abstract description 4
- 238000003786 synthesis reaction Methods 0.000 abstract description 4
- 230000007547 defect Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000013467 fragmentation Methods 0.000 description 1
- 238000006062 fragmentation reaction Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 230000001360 synchronised effect Effects 0.000 description 1
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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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- 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; respectively transmitting the image information to corresponding image layers in the display for displaying according to the association relationship 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, only needs to utilize a display engine hardware synthesis technology, can synthesize the multi-path video stream into one path of video stream, realizes simultaneous recording of the multi-path video, 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 and more popular. The existing monitoring system needs to access a plurality of cameras to cover the whole monitoring area, each camera generates a corresponding media file in the monitoring process, the media files are generally obtained by independently encoding and packaging the content recorded by each camera, for example, the recording file corresponding to the camera a at the moment of 19: 07/40 seconds at 5/20/2020 is 20200520_190740a.ts, and the recording file corresponding to the camera B is 20200520_190740 ab.ts. However, the existing monitoring system has the following defects:
1) the storage module is under the pressure of multi-path writing, the requirement on the storage module is higher, and when many storage modules are subjected to multi-path writing, compared with the situation of single-path writing, the writing speed attenuation is obvious, and data loss caused by untimely writing is easy to occur.
2) When 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) A player cannot be supported to play multiple media files simultaneously.
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 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;
respectively transmitting the image information to corresponding image layers in the display for displaying according to the association relationship 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;
and writing the media file into the storage module.
Preferably, the display areas of 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 processing the stored display information specifically includes:
the stored display information is encoded and encapsulated.
Preferably, after writing the media file into the storage module, the method further comprises:
when a playback instruction is received, calling 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 includes:
a camera: the system is used for obtaining image information after shooting;
a display: the system comprises a camera, a map layer management module, a map layer configuration module and a data processing module, wherein the camera is used for receiving a configuration instruction, configuring map layers and establishing an association relationship between each map layer and the camera; displaying the image information by using different image layers to obtain display information;
a display engine: is connected with a display; the display engine is used for storing display information;
a storage module: for writing a media file;
a control module: the camera, the display engine and the storage module are connected; the control module is used for transmitting the image information to corresponding image layers in the display according to the association relation; the control module is further configured to read the display information stored by the display engine, process the display information to obtain the media file, and transmit the media file to the storage module.
Preferably, the display areas of 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 coding 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, calling the media file stored in the storage module according to the playback instruction;
transmitting the media file to a display;
the display is further used for displaying the media files by using different layers according to the association relation.
According to the technical scheme, the multi-channel video recording method and the multi-channel video recording system provided by the invention have the advantages that the multi-channel video streams are synthesized and stored in one media file, only one media file needs to be generated, a plurality of media files cannot be generated, the problem of multi-channel writing is avoided, the multi-channel video streams can be synthesized into one video stream only by using a display engine hardware synthesis technology without depending on other special hardware modules, the simultaneous recording of the multi-channel videos is realized, and the problem of concurrence caused by the multi-channel writing is solved.
Drawings
In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
Fig. 1 is a flowchart of a monitoring method according to an embodiment.
Fig. 2 is a schematic flowchart of a monitoring method according to an embodiment.
Fig. 3 is a flowchart of a playback method in a monitoring method according to an embodiment.
Fig. 4 is a block diagram of a monitoring system according to an embodiment.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby. It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the invention pertains.
It will be understood that the terms "comprises" and/or "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 the specification of the present invention 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 contextually as "when", "upon" or "in response to a determination" or "in response to a detection". Similarly, the phrase "if it is determined" or "if a [ described condition or event ] is detected" may be interpreted contextually to mean "upon determining" or "in response to determining" or "upon detecting [ described condition or event ]" or "in response to detecting [ described condition or event ]".
The first embodiment is as follows:
a monitoring method based on multi-path video recording is disclosed, referring to fig. 1 and 2, and comprises 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: respectively transmitting the image information to corresponding image layers in the display for displaying according to the association relationship 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: and writing the media file into the storage module.
Specifically, the positions and the number of the cameras are determined according to the monitored area, if the dead angles of the monitored area are large, the cameras are required to be arranged at the dead angles to ensure that the whole monitored area is monitored, and more cameras are required to be installed at the moment. If the monitored area is small or is spacious, the whole monitored area can be monitored by only installing a small number of cameras. The image information may be a video or picture taken by a camera.
The display in the monitoring method may be a multi-layer display. The monitoring method firstly needs to set the layer and resolution of the display. If the image information of the four cameras needs to be collected, the screen of the display needs to be divided into four split screens, and the image information of the four cameras is displayed respectively. Assuming that the data resolution of the camera is 1280x720, the resolution of the display needs to be 2560x1440, the display is set to 4 layers, and the width and height of each layer are set to 1280 and 720, respectively, and then the display area coordinates of the four layers obtained are { x ═ 0, y ═ 0}, { x ═ 1280, y ═ 0}, { x ═ 0, y ═ 720} and { x ═ 1280, y ═ 720}, respectively. And x and y are respectively the abscissa and the ordinate corresponding to the display area.
After the layer configuration of the display is completed, it is further necessary to configure an association relationship between each layer and the camera, for example, configure the layer a to be associated with the camera a, which indicates that the layer a displays image information of the camera a. Similarly, the layer B is configured to be associated with the camera B and represents that the layer B displays the 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 relationship. 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 by all the 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 realized.
According to the monitoring method, 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 embody the data after all the image information is superposed. And the display engine is used for integrating the data of each layer to obtain the data after the layers are overlapped. The image composition technique of the display engine can be implemented by a GPU, for example, by stitching through the GPU, which can compose a plurality of images into one image, thereby composing a plurality of video streams into one video stream. The GPU may be implemented in an integrated or external manner.
After the monitoring method completes the synthesis of each image information, the data are processed to generate a media file for storage, and thus the finally obtained media file contains the image information of each camera. When the method is used for creating the media file, a space can be pre-allocated according to the size of the media file in a pre-allocation mode on the file system level. This reduces fragmentation of the file system over time.
The monitoring method can be applied to the vehicle-mounted field or the monitoring field, and is mainly applied to the monitoring scene of a plurality of paths of cameras. In the existing monitoring system, media files recorded and generated by multiple paths of cameras are independent, and the media files generated in the recording process can be continuously written into a storage module. Due to the fact that the product specification is continuously upgraded, the resolution ratio of a camera is higher and higher, the generated media file is larger and larger, the writing speed requirement on a storage module is higher and higher, and the situation that video data are lost due to blocking easily occurs in the existing monitoring system.
The monitoring method synthesizes the multi-path video streams and stores the synthesized multi-path video streams into one media file, only one media file is needed to be generated, a plurality of media files cannot be generated, the problem of multi-path writing is avoided, the multi-path video streams can be synthesized into one-path video stream only by utilizing a display engine hardware synthesis technology without depending on other special hardware modules, the simultaneous recording of the multi-path videos is realized, and the problem of concurrency caused by the multi-path writing is solved.
Preferably, the display areas of different layers in the display do not overlap.
Specifically, in order to ensure the integrity of the image information shot by all the cameras, the display areas of different image layers are not overlapped, so that when the display is used for displaying, the display areas of the image information are not overlapped, 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 layer cannot be smaller than the size of the image information, otherwise, the image information is zoomed when displayed, and the definition is reduced. For example, in the above example, if the data resolution of the camera is 1280x720, and the size of the obtained image information is 1280x720, the size of the layer cannot be smaller than 1280x720 when the size of the layer is set.
Preferably, the processing the stored display information specifically includes:
the stored display information is encoded and encapsulated.
Specifically, the monitoring method generates the media file after encoding and packaging the video stream synthesized by the display engine.
Preferably, after writing the media file into the storage module, referring to fig. 3, further comprising:
S7: when a playback instruction is received, calling 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 incidence 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, and the playback instruction may be voice information or a trigger signal generated by triggering any one of the switches or buttons. When playback is needed, the display receives the media files needing playback, and playback is carried out by utilizing different image layers according to the established association relation. The playback mode is simple and visual, synchronous playing can be realized, and the compatibility is good. The user does not need to search the media file of each camera in the file list for multiple times, and the display does not need to be modified in order to realize that multiple windows view data of multiple cameras simultaneously.
Example two:
a monitoring system based on multi-channel video recording, referring to fig. 4, comprising:
the camera 2: the system is used for obtaining image information after shooting;
the display 3: the system is used for receiving a configuration instruction, configuring layers and establishing an association relation between each layer and the camera 2; displaying the image information by using different image layers to obtain display information;
The display engine 4: is connected with the display 3; the display engine 4 is used for storing display information;
the storage module 1: for writing a media file;
the 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 by 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 coding and packaging the stored display information to obtain the media file.
Preferably, the control module 5 is further configured to:
when a playback instruction is received, calling 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 by using different layers according to the association relationship.
For the sake of brief description, the system provided by the embodiment of the present invention may refer to the corresponding content in the foregoing embodiments.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.
Claims (10)
1. A monitoring method based on multi-channel video recording is characterized by comprising 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;
respectively transmitting the image information to corresponding image layers in the display for displaying according to the association relationship 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.
2. The method for monitoring based on multi-channel video recording according to claim 1,
the display areas of different layers in the display are not overlapped.
3. The method for monitoring based on multi-channel video recording according to claim 2,
and the size of the layer is larger than or equal to the size of the image information.
4. The monitoring method based on multi-channel video recording according to claim 1, wherein the processing of the stored display information specifically comprises:
and encoding and packaging the stored display information.
5. The method for monitoring based on multi-channel video recording as claimed in claim 1, further comprising after writing the media file into a storage module:
when a playback instruction is received, calling the media file stored in a 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.
6. A monitoring system based on multi-channel video recording is characterized by comprising:
a camera: the system is used for obtaining image information after shooting;
a display: the system comprises a camera, a map layer management module, a map layer configuration module and a data processing module, wherein the camera is used for receiving a configuration instruction, configuring map layers and establishing an association relationship between each map layer and the camera; displaying the image information by using different image layers to obtain display information;
a display engine: is connected with the display; the display engine is used for storing the display information;
a storage module: for writing the media file;
a control module: the camera, the display engine and the storage module are connected; the control module is used for transmitting the image information to corresponding image layers in the display according to the association relation; the control module is further configured to read the display information stored by the display engine, process the display information to obtain the media file, and transmit the media file to the storage module.
7. The monitoring system based on multi-channel video recording according to claim 6,
the display areas of different layers in the display are not overlapped.
8. The monitoring system based on multi-channel video recording according to claim 7,
And the size of the layer is larger than or equal to the size of the image information.
9. The monitoring system based on multi-channel video recording of claim 6, wherein the control module is specifically configured to:
and coding and packaging the stored display information to obtain the media file.
10. The multi-channel video recording system of claim 6, wherein the control module is further configured to:
when a playback instruction is received, calling the media file stored in a storage module according to the playback instruction;
transmitting the media file to the display;
the display is further used for displaying the media files by using different layers according to the association relation.
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