CN115380539A

CN115380539A - Apparatus and system for processing video

Info

Publication number: CN115380539A
Application number: CN202080099583.1A
Authority: CN
Inventors: 苗少峰; 周晶晶
Original assignee: Xian Novastar Electronic Technology Co Ltd
Current assignee: Xian Novastar Electronic Technology Co Ltd
Priority date: 2020-04-15
Filing date: 2020-04-15
Publication date: 2022-11-22
Anticipated expiration: 2040-04-15
Also published as: CN115380539B; WO2021207979A1

Abstract

The application discloses a device and a system for processing video, the system comprises: the video output device comprises at least one first video output card, a second video output card and a third video output card, wherein each first video output card comprises a first processor, each first processor comprises a plurality of first zooming modules and at least one first superposition module, each first superposition module is connected with the corresponding first zooming module, and each first superposition module is used for superposing the received first zoomed video to obtain a first superposed video; the second video output card comprises a second processor and at least one output interface, wherein the second superposition module is connected with the plurality of second scaling modules; the exchanger is connected with each first video output card and each second video output card and is used for transmitting the first superposed video to the second video output card; the second superposition module is used for superposing the received first superposed video and the received second zoomed video to obtain a second superposed video, and the output interface is used for outputting the second superposed video.

Description

Apparatus and system for processing video

Technical Field

The application relates to the field of video display, in particular to a video display method.

Background

In a card-inserted video processing device (e.g., a video switcher, a video splicer), a plurality of video output cards are usually inserted. Because the number of videos output by a single Video output card is limited, in order to display more videos on a display device, at present, video Processing Units (VPUs) are often adopted to perform operations such as scaling and overlaying on the videos. However, the number of VPUs in a video processing device is generally fixed, and the VPUs in the video processing device group operations such as scaling and superimposing of video sources, and the video processing device cannot output any video source in the VPUs, so that the resource scheduling is limited.

Aiming at the technical problems that in the related art, the video processing equipment has a fixed grouping mode on video sources, so that a video output card cannot output any video source and resource scheduling is limited, an effective solution is not provided at present.

Disclosure of Invention

The embodiment of the application provides a method and a device for processing video data, which at least solve the technical problems that in the related art, the video processing equipment has a fixed grouping mode on video sources, so that a video output card cannot output any video source, and resource scheduling is more limited.

According to an aspect of an embodiment of the present application, there is provided a system for processing video, including: the video processing device comprises at least one first video output card, at least one second video output card and a plurality of second superposition modules, wherein each first video output card comprises a first processor, each first processor comprises a plurality of first zooming modules and at least one first superposition module, each first superposition module is connected with the corresponding first zooming module, the plurality of first zooming modules are arranged to zoom a plurality of paths of first video sources to obtain a plurality of first zoomed videos, and each first superposition module is arranged to superpose the received first zoomed videos to obtain first superposed videos; the second video output card comprises a second processor and at least one output interface, wherein the second processor is connected with the output interface, the second processor comprises a plurality of second zooming modules and at least one second superposition module, the second superposition module is connected with the plurality of second zooming modules, and the plurality of second zooming modules are arranged for zooming the plurality of second video sources to obtain a plurality of second zoomed videos; the exchanger is connected with each first video output card and each second video output card and is used for transmitting the first superposed video to the second video output card; the second superposition module is used for superposing the received first superposed video and the received second zoomed video to obtain a second superposed video, and the output interface is used for outputting the second superposed video.

Optionally, in the second video output card: and if the number of the output interfaces is multiple, the number of the second superposition modules is multiple, and the number of the output interfaces is equal to that of the second superposition modules, wherein each output interface corresponds to one second superposition module, and the output interfaces are set to output the second superposed videos superposed by the corresponding second superposition modules.

Optionally, in each first video output card, the multiple first video sources include multiple first playing video sources and multiple first preview video sources, the multiple first zooming modules include multiple first playing zooming modules and multiple first preview zooming modules, the first superimposing module includes a first playing superimposing module and a first preview superimposing module, each first playing superimposing module is connected to the multiple first playing zooming modules, each first preview superimposing module is connected to the multiple first preview zooming modules, the multiple first playing zooming modules are configured to zoom the multiple first playing video sources to obtain multiple first playing zooming videos, and the first playing superimposing module is configured to superimpose the received first playing zooming videos to obtain first superimposed playing videos; the first preview zooming modules are arranged to zoom the multi-channel first preview video sources to obtain a plurality of first preview zoomed videos, and the first preview overlapping module is arranged to overlap the received first preview zoomed videos to obtain first overlapped preview videos; in the second video output card, the multi-channel second video source comprises a multi-channel second playing video source and a multi-channel second previewing video source, the second zooming modules comprise a plurality of second playing zooming modules and a plurality of second previewing zooming modules, the second overlapping module comprises a second playing overlapping module and a second previewing overlapping module, each second playing overlapping module is connected with the second playing zooming modules, each second previewing overlapping module is connected with the second previewing zooming modules, the second playing zooming modules are used for zooming the multi-channel second playing video source to obtain a plurality of second playing zoomed videos, and the second previewing zooming modules are used for zooming the multi-channel second previewing video source to obtain a plurality of second previewing zoomed videos; the exchanger is set to respectively transmit the first overlapped played video and the first overlapped previewed video output by each first video output card to a first playing overlapping module and a first previewing overlapping module of the next first video output card until the first overlapped played video and the first overlapped previewed video output by the last first video output card are respectively transmitted to a second playing overlapping module and a second previewing overlapping module; the second playing and overlapping module is used for overlapping the received second playing zoom video and the first overlapped playing video output by the last first video output card to obtain a second overlapped playing video; the second preview overlapping module is used for overlapping the received second preview zoom video and the first overlapped preview video output by the last first video output card to obtain a second overlapped preview video, and the output interface is used for outputting the second overlapped play video or the second overlapped preview video.

Optionally, the at least one first video output card comprises a first set of first video output cards and a second set of first video output cards: in each first video output card of the first group of first video output cards, a plurality of first video sources are a plurality of first playing video sources, a plurality of first zooming modules are a plurality of first playing zooming modules, and a first overlapping module is a first playing overlapping module, wherein each first playing overlapping module is connected with the plurality of first playing zooming modules, the plurality of first playing zooming modules are arranged to zoom the plurality of first playing video sources to obtain a plurality of first playing zoomed videos, and the first playing overlapping module is arranged to overlap the received first playing zoomed videos to obtain first overlapped playing videos; in each first video output card of the second group of first video output cards, the multiple first video sources are multiple first preview video sources, the multiple first zooming modules are multiple first preview zooming modules, and the first superposition module is a first preview superposition module, wherein each first preview superposition module is connected with the multiple first preview zooming modules; in the second video output card, the multi-channel second video source comprises a multi-channel second playing video source and a multi-channel second previewing video source, the plurality of second zooming modules comprise a plurality of second playing zooming modules and a plurality of second previewing zooming modules, and the second overlapping module comprises a second playing overlapping module and a second previewing overlapping module, wherein each second playing overlapping module is connected with the plurality of second playing zooming modules, and each second previewing overlapping module is connected with the plurality of second previewing zooming modules; the plurality of second playing zooming modules are used for zooming the multipath second playing video sources to obtain a plurality of second playing zooming videos, and the plurality of second previewing zooming modules are used for zooming the multipath second previewing video sources to obtain a plurality of first previewing zooming videos; the exchanger is arranged to transmit a first overlapped playing video output by each first video output card of the first group of first video output cards to a first playing overlapping module of a next first video output card until the first overlapped playing video output by the last first video output card of the first group of first video output cards is transmitted to a second playing overlapping module, and transmit a first overlapped previewing video output by each first video output card of the second group of first video output cards to a first previewing overlapping module of the next first video output card until the first overlapped previewing video output by the last first video output card of the second group of first video output cards is transmitted to a second previewing overlapping module; the second playing and overlapping module is configured to overlap the received second playing and zooming video and a first overlapped playing video output by a last first video output card of the first group of first video output cards to obtain a second overlapped playing video, the second previewing and overlapping module is configured to overlap the received second previewing and zooming video and the first overlapped previewing video output by the last first video output card of the second group of first video output cards to obtain a second overlapped previewing video, and the output interface is configured to output the second overlapped playing video or the second overlapped previewing video.

Optionally, in the second video output card: and if the number of the output interfaces is multiple, the number of the second overlapping modules is multiple, and the number of the output interfaces, the number of the second playing overlapping modules and the number of the second previewing overlapping modules are equal, wherein each output interface corresponds to one second playing overlapping module and one second previewing overlapping module, and the output interfaces are set to output playing videos overlapped by the corresponding second playing overlapping modules or previewing videos overlapped by the corresponding second previewing overlapping modules after second overlapping.

Optionally, the first video output card and the second video output card use the same synchronization source.

Optionally, the synchronization source is from a synchronization signal generator, or the synchronization source is a display timing of the second video output card.

According to another aspect of the embodiments of the present application, there is also provided an apparatus for processing video, including: the processor comprises a plurality of zooming modules and at least one superposition module, the superposition module is connected with the zooming modules, the zooming modules are used for zooming the multi-channel video source to obtain a plurality of zoomed videos, and the superposition module is used for superposing the received zoomed videos to obtain superposed videos; and the output interface is connected with the processor and is set to output the superposed video.

Optionally, if the number of the output interfaces is multiple, the number of the overlay modules is multiple, and the number of the output interfaces is equal to the number of the overlay modules, where each output interface corresponds to one overlay module, and the output interfaces are configured to output the overlaid video overlaid by the corresponding overlay modules.

Optionally, the multi-channel video source includes a multi-channel playing video source and a multi-channel previewing video source, the multiple zooming modules include multiple playing zooming modules and multiple previewing zooming modules, the superimposing module includes a playing superimposing module and a previewing superimposing module, each playing superimposing module is connected with the multiple playing zooming modules, each previewing superimposing module is connected with the multiple previewing zooming modules, the multiple playing zooming modules are configured to zoom the multi-channel playing video source to obtain multiple playing zooming videos, and the playing superimposing module is configured to superimpose the received playing zooming videos to obtain the superimposed playing videos; the preview zooming module is used for zooming the multi-channel preview video source to obtain a plurality of preview zoomed videos, and the preview overlapping module is used for overlapping the received preview zoomed videos to obtain overlapped preview videos; the output interface is set to output the superposed played video or the superposed previewed video.

Optionally, if the number of the output interfaces is multiple, the number of the playing and superimposing modules is multiple, the number of the preview and superimposing modules is multiple, and the number of the output interfaces, the number of the playing and superimposing modules, and the number of the preview and superimposing modules are equal, wherein each output interface corresponds to one playing and superimposing module and one preview and superimposing module, and the output interfaces are configured to output the superimposed playing video superimposed by the corresponding playing and superimposing module or the superimposed preview video superimposed by the corresponding preview and superimposing module.

According to another aspect of embodiments of the present application, there is also provided a computer-readable storage medium including instructions that, when executed on a computer, cause the computer to perform the following instructions: respectively carrying out zooming processing on a plurality of paths of video sources to obtain a plurality of zoomed videos; overlapping the received zoomed video to obtain an overlapped video; and outputting the superposed video.

According to another aspect of embodiments of the present application, there is also provided a computer-readable storage medium including instructions that, when executed on a computer, cause the computer to perform the following instructions: the method comprises the steps that a first zooming module of each first video output card of at least one first video output card zooms multiple first video sources to obtain multiple first zoomed videos; superposing the first zoomed video received by the first superposition module of each first video output card to obtain a first superposed video of each first video output card; transmitting the first superposed video to a second video output card through an exchanger, wherein a plurality of second zooming modules of the second video output card zoom a plurality of second video sources to obtain a plurality of second zoomed videos, and the superposing module of the second video output card superposes the received first superposed video and the received second zoomed video to obtain a second superposed video; and outputting the second superposed video.

In the embodiment of the application, the first superposition modules are connected with the plurality of first zooming modules, the second superposition modules are connected with the plurality of second zooming modules, any first zooming video source output by the plurality of first zooming modules connected with the first superposition modules is dispatched through the first superposition modules, any second zooming video source output by the plurality of second zooming modules connected with the second superposition modules is dispatched through the second superposition modules, the number of video sources is expanded by using the exchanger, the technical problem that in the related art, the video processing equipment is fixed in the grouping mode of the video sources, so that the video output card cannot output any video source, and the resource dispatching limitation is more is solved, the purpose of flexibly dispatching the video sources is achieved, and more diversified video effects are presented.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:

fig. 1 is a schematic diagram of an alternative apparatus for processing video according to embodiment 1 of the present application;

fig. 2 is a schematic view of another alternative apparatus for processing video according to embodiment 1 of the present application;

fig. 3 is a schematic view of another alternative apparatus for processing video according to embodiment 1 of the present application;

FIG. 4 is a schematic diagram of an alternative system for processing video according to embodiment 2 of the present application;

FIG. 5 is a schematic diagram of an alternative system for processing video according to embodiment 2 of the present application;

FIG. 6 is a schematic diagram of an alternative system for processing video according to embodiment 2 of the present application;

FIG. 7 is a schematic diagram of an alternative system for processing video according to embodiment 2 of the present application;

FIG. 8 is a schematic diagram of a system for implementing synchronous output by an alternative external synchronous source according to embodiment 2 of the present application; and

fig. 9 is a schematic diagram of a system for implementing synchronous output by an alternative internal synchronous source according to embodiment 2 of the present application.

Detailed Description

It should be noted that, in the present application, the embodiments and features of the embodiments may be combined with each other without conflict. In order to make the technical solutions of the present application better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present application, and not all 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 application.

Furthermore, the terms "first," "second," and the like in the description and in the claims of the present application and in the above-described drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Alternatively, the devices or terms referred to in the various embodiments of the present application may be referred to one another without contradiction.

Example 1

Before describing further details of embodiments of the present application, an alternative apparatus for processing video that may be used to implement the principles of the present application will be described with reference to fig. 1. In its most basic configuration, fig. 1 is a schematic diagram of an apparatus for processing video according to an embodiment of the present application. For descriptive purposes, the architecture portrayed is only one example of a suitable environment and is not intended to suggest any limitation as to the scope of use or functionality of the application. Neither should the apparatus be interpreted as having any dependency or requirement relating to any one or combination of components illustrated in fig. 1.

As shown in fig. 1, the apparatus for processing video provided by the present application includes:

the processor comprises a plurality of zooming modules and at least one superposition module, the superposition module is connected with the zooming modules, the zooming modules are arranged to zoom multi-channel video sources to obtain a plurality of zoomed videos, and the superposition module is arranged to superpose the received zoomed videos to obtain superposed videos.

In an alternative, the apparatus for processing video may be a video splicer, or may also be a video switcher, or may also be a device such as a video processor for performing video processing; the processor may be any chip having a Digital processing function, such as a Field Programmable Gate Array (FPGA), a Digital Signal Processor (DSP), an ARM processor (Advanced RISC Machines), and the like, which is not limited herein.

Specifically, a plurality of scaling modules and at least one superposition module are arranged on the processor. The scaling module may scale down or enlarge the multiple video streams into a unified video frame for subsequent processing. To improve the scaling quality, each scaling module may scale only one video source.

It should be noted that each overlay module is connected to all scaling modules. Because the superposition module is connected with all the zooming modules, the superposition module can superpose the zoomed videos from all the zooming modules and can also superpose the zoomed videos from all the zooming modules at will according to the actual requirements on video sources. In short, the superimposed video source is the video source received by the superimposing module.

And the output interface is connected with the processor and is set to output the superposed video.

In an alternative, the output Interface may be a High Definition Multimedia Interface (HDMI), a display Interface (DP), or the like.

It should be noted that, the setting of the output interface to output the superimposed video may be understood as follows: the video output by the output interface is obtained based on the superposed video. For example, assuming that the processor is an FPGA, after the video source is scaled and superimposed by the FPGA, the video source needs to be encoded by an encoding chip to obtain an encoded video, and the output interface outputs the encoded video.

Taking a video splicer as an example, in order to schedule more video sources as much as possible, a plurality of scaling modules and an overlapping module are arranged on a processor of the video splicer. Each zooming module zooms one path of video source, and the zooming modules zoom multiple paths of video sources one to one, so that the multiple paths of video sources are reduced or enlarged into zoomed videos with uniform formats. The superposition module is connected with all the zooming modules, so that part or all of the zoomed videos can be superposed, and the zoomed videos output by the zooming modules are specifically superposed and determined by the zoomed videos received by the superposition module. The superposed video is output by an output interface and then transmitted to display equipment.

Compared with the prior art, the superposition module can superpose and zoom videos according to the user needs, the purpose of scheduling any video source is achieved, and layer expansion on the display device is achieved. If more image layers need to be displayed, only more devices for processing video according to the embodiments of the present application need to be accessed according to actual requirements. It is easy to notice that the zooming module and the superposition module can be integrated in an independent processor, so that a master control chip with richer resources in the video processing equipment is prevented from being replaced, and flexible configuration of the video source is realized.

In an embodiment of the present application, an apparatus for processing video includes: the processor comprises a plurality of zooming modules and at least one superposition module, the superposition module is connected with the zooming modules, the zooming modules are used for zooming the multi-channel video source to obtain a plurality of zoomed videos, and the superposition module is used for superposing the received zoomed videos to obtain superposed videos; and the output interface is connected with the processor and is set to output the superposed video. Compared with the prior art, the superposition module is connected with the zooming modules, any video source is dispatched through the superposition module, the technical problems that in the prior art, the video processing equipment is fixed in the grouping mode of the video source, the video output card cannot output any video source, and resource dispatching is limited are solved, the purpose of flexibly dispatching the video source is achieved, and more diversified video effects are presented.

The above-described components of this embodiment are further described below.

Fig. 2 shows a schematic diagram of an apparatus for processing video with two output interfaces. In the connection relationship shown in fig. 2, each output interface corresponds to one overlay module. Supposing that 16 zooming modules are provided, the superposition module A is connected with the output interface A, the superposition module B is connected with the output interface B, and although the 16 zooming modules are connected with each superposition module, each superposition module only superposes the received zoomed video, so that the output interface A can output the superposed video A superposed by the superposition module A, and the output interface B can output the superposed video B superposed by the superposition module B. It should be noted that, if the overlay module a receives an instruction to overlay a certain route of zoomed video, the route of zoomed video cannot be overlaid by the overlay module B at the same time, and each route of zoomed video can only be overlaid by one overlay module and cannot be overlaid by two overlay modules at the same time.

Optionally, in the video switcher, the multiple video sources include multiple playing video sources and multiple previewing video sources, the multiple zooming modules include multiple playing zooming modules and multiple previewing zooming modules, the superimposing module includes a playing superimposing module and a previewing superimposing module, each playing superimposing module is connected with the multiple playing zooming modules, and each previewing superimposing module is connected with the multiple previewing zooming modules.

In an alternative, the playing video source may be a video for playing, and the previewing video source may be a video for previewing. Since the main function of the video switcher is to monitor the preview video and the play video to switch the preview video to the currently played video, the video sources include a play video source for play and a preview video source for preview.

In the video switcher, a plurality of playing zooming modules are arranged to zoom a plurality of playing video sources to obtain a plurality of playing zooming videos, and a playing overlapping module is arranged to overlap the received playing zooming videos to obtain overlapped playing videos.

In an alternative, the play-after-overlay video (PGM) may be a video to be played on a display device.

In the video switcher, a plurality of preview zooming modules are arranged to zoom a plurality of preview video sources to obtain a plurality of preview zoomed videos, and a preview overlapping module is arranged to overlap the received preview zoomed videos to obtain the overlapped preview videos.

In an alternative, the above-mentioned superimposed Preview Video (PVW) may be a video to be previewed on the monitoring device.

It should be noted that the playing and superimposing module may superimpose the received playing and zooming video, and the preview and superimposing module may superimpose the received previewing and zooming video, so as to achieve the effects of previewing and playing simultaneously. However, if the scaled video output by the scaling module is used for preview, it cannot be used for play at the same time, and if the scaled video output by the scaling module is used for play, it cannot be used for preview at the same time.

Optionally, since the video splicer may not have a preview function, only one overlay module may be needed to schedule any zoomed video to be played. The video switcher adds preview content so at least two overlay modules are required. After the playing video source and the preview video source are allocated, the playing superposition module can freely schedule to play part or all of the video sources, and the preview superposition module can freely schedule to preview part or all of the video sources.

In the video switcher, an output interface is set to output the overlapped playing video or the overlapped previewing video.

The PVW is mainly used with the PGM, because in a studio, the PGM actually played needs to be previewed before being provided on a monitoring device, and is switched to the PGM only when meeting the playing requirement, and is output through an output interface. Therefore, the output interface can only output one video.

In an alternative, the superimposed preview video and the superimposed play video may be switched to preview or play through a mix switching module, that is, the mix switching module may select the superimposed preview video to play or the superimposed play video to play, and the mix switching module may be disposed in the processor.

For example, a playing video after being superimposed is displayed on the display device, a previewing video after being superimposed is displayed on the monitoring device, and if the previewing video after being superimposed meets the playing condition, the playing video is immediately switched to the previewing video and displayed on the display device. At this time, the superimposed preview video is converted into the play video, and the previously superimposed play video is converted into the preview video.

Note that the superimposed preview video may be displayed on the console. Except that the preview video displayed on the console is in an edited state. In order to see a more visual video effect, the previewed video after being overlaid can be monitored through a pre-monitoring card. Of course, the pre-monitor card may monitor all video sources, PGM and PVW.

Optionally, the apparatus may further include: the pre-monitoring card is respectively connected with the output ends of the multi-path video sources and the output end of the superposition module and is set to monitor at least one of the following video data: the video source, the playing video after the superposition and the previewing video after the superposition.

Because the output interface can only output one path of video data, the scheme of the embodiment can monitor more video data through the pre-monitoring card. Specifically, the pre-monitoring card can be connected with the output ends of the multi-channel video sources and the output end of the superposition module, so that the original multi-channel video sources, the superposed videos superposed by the superposition module and the superposed previewed videos can be displayed on the pre-monitoring card, the working personnel can conveniently check each video data, and the working personnel can master various video pictures.

Optionally, if the number of the output interfaces is multiple, the number of the playing and superimposing modules is multiple, the number of the preview and superimposing modules is multiple, and the number of the output interfaces, the number of the playing and superimposing modules, and the number of the preview and superimposing modules are equal, where each output interface corresponds to one playing and superimposing module and one preview and superimposing module, and the output interfaces are configured to output the superimposed playing video superimposed by the corresponding playing and superimposing module or the superimposed preview video superimposed by the corresponding preview and superimposing module.

In the above scheme, each output interface corresponds to one playing and overlapping module and one preview and overlapping module. For example, the playing and superimposing module a and the preview and superimposing module a are connected to the output interface a, and the playing and superimposing module B and the preview and superimposing module B are connected to the output interface B, so that the output interface a can output the playing video a superimposed by the playing and superimposing module a or the previewing video a superimposed by the preview and superimposing module a, and the output interface B can output the playing video B superimposed by the playing and superimposing module B or the previewing video B superimposed by the preview and superimposing module B. As for the specific video source distribution, the scheduling is carried out by the staff, and the grouping limitation of the video sources is avoided. Therefore, multiple groups of overlapped preview videos and overlapped play videos can be switched simultaneously to adapt to complex scenes in which multiple display devices work simultaneously.

Figure 3 shows a schematic diagram of an alternative apparatus for processing video. As shown in fig. 2, there are 8 scaling modules in the video output card, each scaling module scales one video source, and the overlay module is connected to each scaling module. In order to avoid confusion caused by too many lines, only the input-output relationship between the scaled video and the overlay module in the current overlay mode is shown in the figure. The video source 1-4 is used for playing, the zooming module 1-4 is a playing zooming module, the overlaying module 1 is a playing overlaying module, the video source 5-8 is used for previewing, the zooming module 5-8 is a previewing zooming module, and the overlaying module 2 is a previewing overlaying module. When the superposition module receives which zoomed video, the zoomed video is superposed, otherwise, the zoomed video is not superposed. In this way, each overlay module can freely overlay the scaled videos of all the scaling modules connected with the overlay module, and the purpose of randomly scheduling the output layers is achieved. In fig. 3, the overlay module 1 can freely schedule the scaled video sources 1-4, and the overlay module 2 can freely schedule the scaled video sources 5-8. The output interface outputs the overlaid scaled video 1-4 or the overlaid scaled video 5-8. In addition, a single output card can also support two output interfaces, all video sources can be dispatched to the enabled output interfaces under the condition that only one output interface is enabled, and the specific interface for scaling the video distribution can be dispatched by a worker according to actual requirements under the condition that a plurality of output interfaces are enabled, so that the grouping limitation of the video sources is completely avoided.

Example 2

Under the apparatus for processing video provided in embodiment 1, the present embodiment provides a system for processing video. Fig. 4 is a schematic diagram of a system for processing video according to an embodiment of the present application, as shown in fig. 4, the system includes:

at least one first video output card, every first video output card includes first treater, and first treater includes a plurality of first modules of zooming and at least one first stack module, and wherein, first stack module all is connected with a plurality of first modules of zooming, and a plurality of first modules of zooming set up to zoom to handle to multichannel first video source and obtain a plurality of first videos of zooming, and first stack module sets up to stack the first video of zooming that receives, obtains first post stack video.

In an alternative, the system for processing video may be a video splicer or a video switcher; the first video output card can be independent of video processing equipment, and the video output card can integrate functions of zooming video, superposing video, decoding, filtering, real-time transmission and the like and support video streams of various quality levels; the first processor may be any chip with a digital processing function, such as an FPGA, a DSP, an ARM, and the like, which is not limited herein.

Specifically, the first processor is provided with a plurality of first scaling modules and at least one first superposition module. The first scaling module may scale down or up the multiple video streams into a unified video frame for subsequent processing. In order to improve the scaling quality, each first scaling module may scale only one video source.

It should be noted that each first superimposing module is connected to all first scaling modules. Because the first superimposing module is connected with all the first scaling modules, the first superimposing module can superimpose the first scaled videos from all the first scaling modules, and can also arbitrarily superimpose the first scaled videos from all the first scaling modules according to the actual requirement on the first video source. In summary, the superimposed video source is the first video source received by the first superimposing module.

The second video output card comprises a second processor and at least one output interface, wherein the second processor is connected with the output interface, the second processor comprises a plurality of second zooming modules and at least one second overlapping module, the second overlapping module is connected with the second zooming modules, and the second zooming modules are arranged to zoom the second video sources to obtain a plurality of second zoomed videos.

It should be understood that the first video source and the second video source in the present application may be the same video source or different video sources.

In an alternative, the detailed description of the second video output card may refer to the description of the first video output card, and is not repeated herein for brevity.

The output Interface may be a High Definition Multimedia Interface (HDMI), a display Interface (DP), or the like.

Specifically, the second processor is provided with a plurality of second scaling modules and at least one second superposition module. The second scaling module may scale down or up the multiple video streams into a unified video frame for subsequent processing. In order to improve the scaling quality, each second scaling module may scale only one video source.

It should be noted that the first video output card and the second video output card may have the same structure. That is, the first video output card may also include an output interface, but not be used. Thus, flexible configuration of resources can be more adapted.

The exchanger is connected with each first video output card and each second video output card and is used for transmitting the first superposed video to the second video output card; the second superposition module is used for superposing the received first superposed video and the received second zoomed video to obtain a second superposed video, and the output interface is used for outputting the second superposed video.

In one alternative, the switch may employ a cross-point (CrossPoint) chip. The CrossPoint chip supports exchange backup of video data, and the damage of local signals does not influence the normal operation of other parts.

In the above scheme, the switch may transmit video data between the first video output card and the second video output card to expand the number of video sources.

It should be noted that each second superimposing module is connected to all second scaling modules. The second scaling module 1 in fig. 4 is actually connected to the second overlay module, but since the video after the first overlay occupies one input channel of the second overlay module, the second overlay module will receive one less path of the second scaled video. Therefore, the second overlaying module can overlay the second zoomed videos from all the second zooming modules, and can also arbitrarily overlay the second zoomed videos from all the second zooming modules according to the actual requirements on the second video source. In short, the superimposed video source is the video source received by the second superimposing module. And the received video source comprises a second zoomed video and a first superposed video.

In an alternative embodiment, a plurality of first video output cards, a second video output card, are cascaded through the switch. The overlapped first overlapped video of the first video output card is not displayed, but is mapped to an input channel of a first overlapping module of the second first video output card through the exchanger to be used as a first video input source, and is overlapped with a plurality of first zoomed videos which are overlapped by the second first video output card, so that the purpose of expanding the image layer is achieved. Finally, the exchanger transmits the first superposed video output by the last first video output card to a second superposition module of a second video output card, superposes the first superposed video with the second zoomed video to obtain a final second superposed video, and then outputs the second superposed video through the output interface.

For example, in the architecture depicted in fig. 5, two first video output cards and one second video output card are included. Each output card has 8 scaling modules and 1 superposition module. The exchanger transmits the first superposed video 1 comprising 8 image layers output by the first video output card 1 to the superposition module of the first video output card 2. Because the first superimposed video 1 occupies one channel of the superimposing module of the first video output card 2, the superimposing module of the first video output card 2 can superimpose 7 zoomed videos in addition to the first superimposed video 1, and thus the first superimposed video 2 includes 13 layers. And the exchanger transmits the first superposed video 2 to a superposition module of a second video output card. Because the first superimposed video 2 occupies one channel of the second video output card superimposing module, the superimposing module of the second video output card can superimpose 7 paths of zoomed videos in addition to the first superimposed video 2, and therefore, the second superimposed video totally comprises 19 image layers. And finally, outputting the second superposed video through an output interface. Obviously, the addition of a switch greatly expands the number of layers that can be displayed.

Compared with the prior art, the first superposition module is connected with the first zooming modules, the second superposition module is connected with the second zooming modules, any first zooming video source output by the first zooming modules connected with the first superposition module is dispatched through the first superposition module, any second zooming video source output by the second zooming modules connected with the second superposition module is dispatched through the second superposition module, the number of the video sources is expanded by utilizing the exchanger, the problem that the video output card cannot output any video source due to the fixed grouping mode of the video processing equipment to the video sources in the prior art is solved, the technical problem that the resource dispatching limitation is more is solved, the aim of flexible dispatching is fulfilled, and more diversified video effects of the video sources are presented.

The above steps of this embodiment are further explained below.

Specifically, the second video output card has output interfaces, and each output interface corresponds to one second overlay module. For example, the second overlay module a is connected to the output interface a, the second overlay module B is connected to the output interface B, the output interface a can preview or play the second overlaid video a output by the second overlay module a, and the output interface B can preview or play the second overlaid video B output by the second overlay module B, so that multiple groups of preview videos and/or play videos can be monitored simultaneously to adapt to a scene where multiple display devices work simultaneously.

In an optional embodiment, in each first video output card, the multiple first video sources include multiple first playing video sources and multiple first preview video sources, the multiple first zooming modules include multiple first playing zooming modules and multiple first preview zooming modules, the first superimposing module includes a first playing superimposing module and a first preview superimposing module, each first playing superimposing module is connected to the multiple first playing zooming modules, each first preview superimposing module is connected to the multiple first preview zooming modules, the multiple first playing zooming modules are configured to zoom the multiple first playing video sources to obtain multiple first playing zooming videos, and the first playing superimposing module is configured to superimpose the received first playing zooming videos to obtain first superimposed playing videos; the plurality of first preview zooming modules are arranged to zoom the multi-channel first preview video sources to obtain a plurality of first preview zoomed videos, and the first preview overlapping module is arranged to overlap the received first preview zoomed videos to obtain first overlapped preview videos.

In the second video output card of the above embodiment, the multiple second video sources include multiple second playing video sources and multiple second preview video sources, the multiple second scaling modules include multiple second playing scaling modules and multiple second preview scaling modules, the second stacking module includes a second playing stacking module and a second preview stacking module, each second playing stacking module is connected to the multiple second playing scaling modules, each second preview stacking module is connected to the multiple second preview scaling modules, the multiple second playing scaling modules are configured to scale the multiple second playing video sources to obtain multiple second playing scaling videos, and the multiple second preview scaling modules are configured to scale the multiple second preview video sources to obtain multiple second preview scaling videos.

The exchanger of the above embodiment is configured to transmit the first post-superimposition played video and the first post-superimposition preview video output by each first video output card to the first playing superimposition module and the first preview superimposition module of the next first video output card, respectively, until the first post-superimposition played video and the first post-superimposition preview video output by the last first video output card are transmitted to the second playing superimposition module and the second preview superimposition module, respectively; the second playing and overlapping module is used for overlapping the received second playing zoom video and the first overlapped playing video output by the last first video output card to obtain a second overlapped playing video; the second preview overlapping module is set to overlap the received second preview zoom video and the first overlapped preview video output by the last first video output card to obtain a second overlapped preview video, and the output interface is set to output the second overlapped play video or the second overlapped preview video.

Fig. 6 shows a schematic diagram of a system for processing video configured in accordance with the above-described embodiments. As shown in fig. 6, the system has a first video output card and a second video output card. When the PGM1 and the PVW1 which are well superimposed by the first video output card are mapped to the second video output card through the exchanger, the PGM1 and the PVW1 respectively occupy one input channel of the superimposing module of the second video output card, so that the superimposing module of the second video output card can further superimpose three layers on the basis of the PGM1 and the PVW1, and the PGM2 or the PVW2 displayed by an output interface has 7 layers at most, thereby achieving the purpose of layer expansion.

In another alternative embodiment, the at least one first video output card includes a first set of first video output cards and a second set of first video output cards:

in each first video output card of the first group of first video output cards, the multiple first video sources are multiple first playing video sources, the multiple first zooming modules are multiple first playing zooming modules, and the first overlapping module is a first playing overlapping module, wherein each first playing overlapping module is connected with the multiple first playing zooming modules, the multiple first playing zooming modules are arranged to zoom the multiple first playing video sources to obtain multiple first playing zooming videos, and the first playing overlapping module is arranged to overlap the received first playing zooming videos to obtain first overlapped playing videos; in each first video output card of the second group of first video output cards, the multiple paths of first video sources are multiple paths of first preview video sources, the multiple first zooming modules are multiple first preview zooming modules, and the first superposition module is a first preview superposition module, wherein each first preview superposition module is connected with the multiple first preview zooming modules, the multiple first playing zooming modules are arranged to zoom the multiple paths of first preview video sources to obtain multiple first preview zoomed videos, and the first preview superposition module is arranged to superpose the received first preview zoomed videos to obtain first superposed preview videos;

in the second video output card, the multiple second video sources comprise multiple second playing video sources and multiple second preview video sources, the multiple second zooming modules comprise multiple second playing zooming modules and multiple second preview zooming modules, the second overlapping module comprises a second playing overlapping module and a second preview overlapping module, each second playing overlapping module is connected with the multiple second playing zooming modules, and each second preview overlapping module is connected with the multiple second preview zooming modules; the plurality of second playing zooming modules are arranged to zoom the plurality of second playing video sources to obtain a plurality of second playing zooming videos, and the plurality of second previewing zooming modules are arranged to zoom the plurality of second previewing video sources to obtain a plurality of first previewing zooming videos;

the exchanger is arranged to transmit the first overlapped playing video output by each first video output card of the first group of first video output cards to a first playing overlapping module of the next first video output card until the first overlapped playing video output by the last first video output card of the first group of first video output cards is transmitted to a second playing overlapping module, and transmit the first overlapped previewing video output by each first video output card of the second group of first video output cards to a first previewing overlapping module of the next first video output card until the first overlapped previewing video output by the last first video output card of the second group of first video output cards is transmitted to a second previewing overlapping module; the second playing and overlapping module is used for overlapping the received second playing zoom video and the first overlapped playing video output by the last first video output card of the first group of first video output cards to obtain a second overlapped playing video, the second previewing and overlapping module is used for overlapping the received second previewing zoom video and the first overlapped previewing video output by the last first video output card of the second group of first video output cards to obtain a second overlapped previewing video, and the output interface is used for outputting the second overlapped playing video or the second overlapped previewing video.

Fig. 7 shows a schematic diagram of a system for processing video configured in accordance with the above-described embodiments. As shown in fig. 7, the system includes a first video output card and a second video output card, where there are two first video output cards, and the overlay module of the first video output card 1 supports overlaying all 8 image layers, and outputs an overlaid PGM1 image. The superposition module of the first video output card 2 supports the superposition of all 8 layers, and outputs the superposed PVW1 image. The PGM1 and the PVW1 can be transmitted to a second video output card through an exchanger, the second video output card can further superimpose 3 layers on the basis of the superimposed PGM1 or PVW1, and the PGM2 or PVW2 which is finally presented supports 11 layers.

It should be noted that, the number of the first video output cards is different, and the cascading scheme may be combined according to the above two ways, so as to maximize the number of display layers.

In the above scheme, each output interface corresponds to one second playing and overlapping module and one second preview and overlapping module. For example, the second playing and superimposing module a and the second preview and superimposing module a are connected to the output interface a, and the second playing and superimposing module B and the second preview and superimposing module B are connected to the output interface B, so that the output interface a can output the second post-superimposition playing video a superimposed by the second playing and superimposing module a or the second post-superimposition preview video a superimposed by the second preview and superimposing module a, and the output interface B can output the second post-superimposition playing video B superimposed by the second playing and superimposing module B or the second post-superimposition preview video B superimposed by the second preview and superimposing module B. As for the specific video source distribution, the scheduling is carried out by the staff, and the grouping limitation of the video sources is avoided. Therefore, multiple groups of overlapped preview videos and overlapped play videos can be switched simultaneously to adapt to complex scenes in which multiple display devices work simultaneously.

Optionally, the system may further include: the pre-monitoring card is respectively connected with the output end of the multi-path first video source, the output end of the multi-path second video source, the output end of the first superposition module and the output end of the second superposition module, and is set to monitor at least one of the following video data: the video playing method comprises the steps of a first video source, a second video source, a first superposed playing video, a first superposed previewing video, a second superposed playing video and a second superposed previewing video.

Because the output interface can only output one path of video data, the scheme of the embodiment can monitor more video data through the pre-monitoring card. Specifically, the card of monitoring in advance can be connected with the output of multichannel first video source, the output of multichannel second video source and the output of first stack module, the output of second stack module, consequently can show primitive first video source, second video source on the card of monitoring in advance to and broadcast the video after the first stack, preview the video after the first stack, broadcast the video after the second stack, preview the video after the second stack, make things convenient for the staff to look over each video data, control various video pictures.

In an alternative, the synchronization source may be implemented by using a synchronization lock (Genlock).

Under the condition that a plurality of video output cards realize layer superposition, the time sequence of video frames transmitted by the video output cards with the superposition relation must be synchronous, otherwise, the superposition cannot be carried out. By using the same synchronization source, it is ensured that the video frames delivered by each video output card are synchronized.

Fig. 8 shows a schematic diagram of an alternative system for implementing synchronous output by an external synchronous source. As shown in fig. 8, the synchronization source is from an external device, such as a Genlock source generator. The Genlock source generator synchronously sends the synchronous signals to each video output card to ensure the time sequence synchronization of each video output card and provide a high-quality picture effect without time difference for users.

FIG. 9 is a schematic diagram of an alternative system for implementing synchronous output by an internal synchronous source. As shown in fig. 9, the display timing from the second video output card is synchronized. The display time sequence of the second video output card is provided for all the previous video output cards (the first video output cards), and the previous video output cards send out the superposed zoom videos according to the display time sequence so as to ensure that the video frames transmitted by the video output cards are synchronous.

Example 3

According to an embodiment of the present application, there is provided a computer-readable storage medium including instructions that, when executed on a computer, cause the computer to perform the following instructions: the method comprises the steps that the mobile terminal collects at least one image of a spliced screen in a preset lighting mode, wherein the preset lighting mode is that a target display unit on the spliced screen is lighted; the mobile terminal determines a correction coefficient of spliced bright and dark lines on a spliced screen based on the position information of the target display unit in the image; and the mobile terminal sends the correction coefficient to the display controller so that the display controller can correct and splice the bright and dark lines according to the correction coefficient.

Example 4

There is also provided, in accordance with an embodiment of the present application, a computer-readable storage medium, including instructions, which when executed on a computer, cause the computer to perform the following instructions: the method comprises the steps that a first zooming module of each first video output card of at least one first video output card zooms multiple first video sources to obtain multiple first zoomed videos; superposing the first zoomed video received by the first superposition module of each first video output card to obtain a first superposed video of each first video output card; transmitting the first superposed video to a second video output card through an exchanger, wherein a plurality of second zooming modules of the second video output card zoom a plurality of second video sources to obtain a plurality of second zoomed videos, and a superposition module of the second video output card superposes the received first superposed video and the received second zoomed video to obtain a second superposed video; and outputting the second superposed video.

The above-mentioned serial numbers of the embodiments of the present application are merely for description and do not represent the merits of the embodiments.

In the embodiments of the present application, the descriptions of the respective embodiments have respective emphasis, and for parts that are not described in detail in a certain embodiment, reference may be made to the related descriptions of other embodiments.

In the embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units may be a logical division, and in actual implementation, there may be 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, units or modules, and may be in an electrical 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 position, or may be distributed on a plurality of units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be substantially implemented or contributed to by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.

The foregoing is only a preferred embodiment of the present application and it should be noted that, as will be apparent to those skilled in the art, numerous modifications and adaptations can be made without departing from the principles of the present application and such modifications and adaptations are intended to be considered within the scope of the present application.

Industrial applicability

The scheme provided by the embodiment of the application can be applied to the field of video display, and is particularly suitable for scenes of video splicing and video switching. In the embodiment of the application, the first stacking module is connected with the plurality of first zooming modules, the second stacking module is connected with the plurality of second zooming modules, any first zooming video source output by the plurality of first zooming modules connected with the first stacking module is dispatched through the first stacking module, any second zooming video source output by the plurality of second zooming modules connected with the second stacking module is dispatched through the second stacking module, the number of video sources is multiplied by the exchanger, the technical problem that in the related technology, the video processing equipment is fixed in the grouping mode of the video sources, the video output card cannot output any video source, and the resource dispatching limitation is large is solved, and the purpose of flexibly dispatching the video sources is achieved.

Claims

A system for processing video, comprising:

the video processing device comprises at least one first video output card, wherein each first video output card comprises a first processor, each first processor comprises a plurality of first zooming modules and at least one first superposition module, each first superposition module is connected with the corresponding first zooming module, the first zooming modules are arranged to zoom multiple paths of first video sources to obtain a plurality of first zoomed videos, and the first superposition modules are arranged to superpose the received first zoomed videos to obtain first superposed videos;

the second video output card comprises a second processor and at least one output interface, wherein the second processor is connected with the output interface, the second processor comprises a plurality of second zooming modules and at least one second superposition module, the second superposition module is connected with the second zooming modules, and the second zooming modules are used for zooming the multi-channel second video source to obtain a plurality of second zoomed videos;

the exchanger is connected with each first video output card and each second video output card and is used for transmitting the first superposed video to the second video output card;

the second superposition module is configured to superpose the received first superposed video and the received second zoomed video to obtain a second superposed video, and the output interface is configured to output the second superposed video.
The system of claim 1, wherein, in the second video output card:

and if the number of the output interfaces is multiple, the number of the second superposition modules is multiple, and the number of the output interfaces is equal to that of the second superposition modules, wherein each output interface corresponds to one second superposition module, and the output interfaces are set to output second superposed videos superposed by the corresponding second superposition modules.
The system of claim 1, wherein:

in each first video output card, the multiple first video sources include multiple first playing video sources and multiple first previewing video sources, the multiple first zooming modules include multiple first playing zooming modules and multiple first previewing zooming modules, the first superimposing module includes a first playing superimposing module and a first previewing superimposing module, each first playing superimposing module is connected with the multiple first playing zooming modules, each first previewing superimposing module is connected with the multiple first previewing zooming modules, the multiple first playing zooming modules are configured to zoom the multiple first playing video sources to obtain multiple first playing zoomed videos, and the first playing superimposing module is configured to superimpose the received first playing zoomed videos to obtain first superimposed playing videos; the plurality of first preview zooming modules are used for zooming the plurality of paths of first preview video sources to obtain a plurality of first preview zoomed videos, and the first preview overlapping module is used for overlapping the received first preview zoomed videos to obtain first overlapped preview videos;

in the second video output card, the multiple second video sources include multiple second playing video sources and multiple second preview video sources, the multiple second scaling modules include multiple second playing scaling modules and multiple second preview scaling modules, the second overlaying module includes a second playing overlaying module and a second preview overlaying module, each second playing overlaying module is connected with the multiple second playing scaling modules, each second preview overlaying module is connected with the multiple second preview scaling modules, the multiple second playing scaling modules are configured to scale the multiple second playing video sources to obtain multiple second playing scaled videos, and the multiple second preview scaling modules are configured to scale the multiple second playing video sources to obtain multiple second preview scaled videos;

the exchanger is arranged to transmit the first overlapped played video and the first overlapped preview video output by each first video output card to a first playing overlapping module and a first preview overlapping module of the next first video output card respectively until the first overlapped played video and the first overlapped preview video output by the last first video output card are transmitted to the second playing overlapping module and the second preview overlapping module respectively;

the second playing and overlapping module is configured to overlap the received second playing zoomed video and the first overlapped playing video output by the last first video output card to obtain a second overlapped playing video; the second preview and overlap module is configured to overlap the received second preview zoom video and the first overlapped preview video output by the last first video output card to obtain a second overlapped preview video, and the output interface is configured to output the second overlapped play video or the second overlapped preview video.
The system of claim 1, wherein: the at least one first video output card includes a first set of first video output cards and a second set of first video output cards:

in each first video output card of the first group of first video output cards, the multiple first video sources are multiple first playing video sources, the multiple first zooming modules are multiple first playing zooming modules, and the first overlaying module is a first playing overlaying module, wherein each first playing overlaying module is connected with the multiple first playing zooming modules, the multiple first playing zooming modules are configured to zoom the multiple first playing video sources to obtain multiple first playing zooming videos, and the first playing overlaying module is configured to overlay the received first playing zooming videos to obtain first overlaid playing videos;

in each first video output card of the second group of first video output cards, the multiple first video sources are multiple first preview video sources, the multiple first zooming modules are multiple first preview zooming modules, and the first superposition module is a first preview superposition module, wherein each first preview superposition module is connected with the multiple first preview zooming modules, the multiple first playing zooming modules are configured to zoom the multiple first preview video sources to obtain multiple first preview zoomed videos, and the first preview superposition module is configured to superpose the received first preview zoomed videos to obtain first superposed preview videos;

in the second video output card, the multiple channels of second video sources include multiple channels of second playing video sources and multiple channels of second previewing video sources, the multiple second zooming modules include multiple second playing zooming modules and multiple second previewing zooming modules, and the second superimposing module includes a second playing superimposing module and a second previewing superimposing module, wherein each second playing superimposing module is connected with the multiple second playing zooming modules, and each second previewing superimposing module is connected with the multiple second previewing zooming modules; the multiple second playing zooming modules are configured to zoom the multiple second playing video sources to obtain multiple second playing zooming videos, and the multiple second previewing zooming modules are configured to zoom the multiple second previewing video sources to obtain multiple first previewing zooming videos;

the exchanger is configured to transmit a first overlapped playing video output by each first video output card of the first group of first video output cards to a first playing overlapping module of a next first video output card until the first overlapped playing video output by a last first video output card of the first group of first video output cards is transmitted to the second playing overlapping module, and transmit a first overlapped previewing video output by each first video output card of the second group of first video output cards to a first previewing overlapping module of the next first video output card until the first overlapped previewing video output by the last first video output card of the second group of first video output cards is transmitted to the second previewing overlapping module;

the second playing and overlapping module is configured to overlap a received second playing zoomed video and a first overlapped playing video output by a last video output card of the first group of first video output cards to obtain a second overlapped playing video, the second previewing and overlapping module is configured to overlap the received second previewing zoomed video and the first overlapped previewing video output by the last video output card of the second group of first video output cards to obtain a second overlapped previewing video, and the output interface is configured to output the second overlapped playing video or the second overlapped previewing video.
The system of claim 3 or 4, wherein in the second video output card:

if the number of the output interfaces is multiple, the number of the second superposition modules is multiple, and the number of the output interfaces, the number of the second playing superposition modules and the number of the second preview superposition modules are equal, wherein each output interface corresponds to one second playing superposition module and one second preview superposition module, and the output interfaces are set to output playing videos overlapped by the corresponding second playing superposition modules or previewing videos overlapped by the corresponding second preview superposition modules.
The system of claim 1, wherein the first video output card and the second video output card use the same synchronization source.
The system of claim 6, wherein the synchronization source is from a synchronization signal generator or the synchronization source is a display timing of the second video output card.
An apparatus for processing video, comprising:

the processor comprises a plurality of zooming modules and at least one superposition module, the superposition module is connected with the zooming modules, the zooming modules are used for zooming a plurality of video sources to obtain a plurality of zoomed videos, and the superposition module is used for superposing the received zoomed videos to obtain superposed videos;

and the output interface is connected with the processor and is used for outputting the superposed video.
The apparatus of claim 8, wherein,

if the number of the output interfaces is multiple, the number of the superposition modules is multiple, and the number of the output interfaces is equal to that of the superposition modules, wherein each output interface corresponds to one superposition module, and the output interfaces are set to output superposed videos superposed by the corresponding superposition modules.
The apparatus of claim 8, wherein the multi-channel video source comprises a multi-channel broadcast video source and a multi-channel preview video source, the plurality of scaling modules comprises a plurality of broadcast scaling modules and a plurality of preview scaling modules, the overlay module comprises a broadcast overlay module and a preview overlay module, each broadcast overlay module is coupled to each of the plurality of broadcast scaling modules, each preview overlay module is coupled to each of the plurality of preview scaling modules,

the multiple playing zooming modules are arranged to zoom the multiple playing video sources to obtain multiple playing zoomed videos, and the playing superposition module is arranged to superpose the received playing zoomed videos to obtain superposed playing videos;

the preview zooming modules are arranged to zoom the multi-channel preview video source to obtain a plurality of preview zoomed videos, and the preview overlapping module is arranged to overlap the received preview zoomed videos to obtain overlapped preview videos;

the output interface is set to output the overlapped playing video or the overlapped previewing video.
The apparatus of claim 10, wherein if the number of output interfaces is plural, the number of playback overlay modules is plural, the number of preview overlay modules is plural, and the number of output interfaces, the number of playback overlay modules, and the number of preview overlay modules are equal,

each output interface corresponds to one playing superposition module and one preview superposition module, and the output interfaces are set to output the superposed playing video superposed by the corresponding playing superposition module or the superposed preview video superposed by the corresponding preview superposition module.