CN113490026B - Video-level remote synchronous film-passing control method - Google Patents
Video-level remote synchronous film-passing control method Download PDFInfo
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- CN113490026B CN113490026B CN202110510477.4A CN202110510477A CN113490026B CN 113490026 B CN113490026 B CN 113490026B CN 202110510477 A CN202110510477 A CN 202110510477A CN 113490026 B CN113490026 B CN 113490026B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/4302—Content synchronisation processes, e.g. decoder synchronisation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
- H04N21/83—Generation or processing of protective or descriptive data associated with content; Content structuring
- H04N21/845—Structuring of content, e.g. decomposing content into time segments
- H04N21/8456—Structuring of content, e.g. decomposing content into time segments by decomposing the content in the time domain, e.g. in time segments
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/80—Generation or processing of content or additional data by content creator independently of the distribution process; Content per se
- H04N21/85—Assembly of content; Generation of multimedia applications
- H04N21/854—Content authoring
- H04N21/8547—Content authoring involving timestamps for synchronizing content
Abstract
The invention discloses a video-level remote synchronous film-passing control method, which comprises a video processing step, wherein the video processing step comprises the steps of processing an original lossless video to generate at least four layered video information with different image quality, synthesizing all the layered video information with different quality according to a preset method to generate the original lossless video, wherein the layered video information comprises a first layer video information, an Alpha layer video information, a third layer video information and a fourth layer video information, the image quality of which is sequentially increased; the method for controlling the over-film further comprises the step of designating one participant as an operation party, and the other participants as participants, wherein the operation party carries out editing operation on the video on a player of the participant. The invention provides a video-level remote synchronous film-passing control method, which solves the problems of system delay and unstable image quality during film-passing by establishing a control mode of layered video information and synchronous operation commands with different quality.
Description
Technical Field
The invention relates to the technical field of video processing, in particular to a video-level remote synchronous film-passing control method.
Background
At present, the remote video collaboration is mainly realized by adopting a screen sharing mode by a video telephone system, such as a known video telephone system of Zoom, webEX, nailing and the like at home and abroad. In addition, the remote desktop mode of the operating system can also be adopted. But both of these solutions currently fail to meet the quality requirements of the film and television. Because of design limitation, screen sharing cannot meet the video quality requirement, and both the two modes have a series of problems of poor system delay, unstable image quality and the like during remote collaboration.
Meanwhile, the compression algorithm adopted by the existing remote collaboration system is based on YUV color space, YUV420 or YUV422 formats and the like, and the color space discards quite large color information and transparency information, and in the film industry, staff adjusts videos by adjusting a preset LUT (color preset table), and the LUT cannot be used correctly on the premise of not having complete color space and transparency information. In this regard, the quality requirements of the current film and television industry far exceed the quality that can be provided by current remote collaboration systems. Also, in the film industry, it is necessary to check for some very fine details, such as the noise distribution of the hair edges, etc. This tiny information is destroyed during normal video compression encoding, so lossless compression is often required if the details are to be kept. However, as soon as lossless compression itself requires too much network bandwidth to be implemented in a remote collaboration environment, a single frame in DPX format will have a size of 30 MB. And secondly, lossless compression is completely original quality, and has great threat to loss of intellectual property of the video and the like.
Disclosure of Invention
The invention aims to provide a video-level remote synchronous film-passing control method, which solves the problems of system delay and unstable image quality during film-passing and also considers the safety consideration of video intellectual property rights by establishing a control mode of layered video information and synchronous operation commands with different quality.
In order to achieve the above purpose, the present invention provides the following technical solutions: the video-level remote synchronous film-passing control method comprises a video processing step, wherein the video processing step comprises the steps of processing an original lossless video to generate at least four layered video information with different image quality, and synthesizing all the layered video information with different image quality according to a preset method to generate the original lossless video, wherein the layered video information comprises a first layer video information, an Alpha layer video information, a third layer video information and a fourth layer video information, the image quality of which is sequentially increased;
generating a corresponding color matching preset table according to an original lossless video, sending the color matching preset table and first-layer video information to a player of a participant, and carrying out local caching on the player;
the method for controlling the video passing provides a control system, wherein the control system is stored with original lossless video, first-layer video information, alpha-layer video information, third-layer video information and fourth-layer video information, and the control system is electrically connected with players of participants;
the control system calls the first layer video information, the Alpha layer video information, the third layer video information or the fourth layer video information according to the operation command of the operating party, and synchronously controls the player of the participant to execute corresponding operation according to the operation command of the operating party.
Preferably, the control system is configured with a synchronization control policy, and the synchronization control policy includes acquiring and identifying an operation command of an operator through a player of the operator, synchronously transmitting the identified operation command to a player of a participant, and executing a corresponding operation by the player of the participant according to the identified operation command.
Preferably, when the operation command is identified as belonging to the first operation command, the player of the participant performs corresponding operations on the first layer of video information according to the identified operation command, where the first operation command includes fast forward, play, and pause.
Preferably, when the operation command is identified to belong to the second operation command, the player of the operator extracts an operation region corresponding to the second operation command, and transmits Alpha-layer video information of the corresponding operation region to the player of the participant, and the player of the participant performs superposition processing on the Alpha-layer video information of the corresponding operation region and the first-layer video information and then locally caches the Alpha-layer video information, wherein the second operation command comprises a color adjustment instruction.
Preferably, when the operation command is identified to belong to the third operation command, the player of the operator extracts a frame corresponding to the third operation command, and transmits third-layer video information of the corresponding frame to the player of the participant, and the player of the participant performs superposition processing on the third-layer video information of the corresponding frame and the first-layer video information and then locally caches the third-layer video information, where the third operation command includes a local amplification instruction.
Preferably, when the operation command is identified to belong to the fourth operation command, the player of the operator extracts a corresponding amplified region in the frame corresponding to the fourth operation command, and transmits fourth-layer video information of the corresponding amplified region in the corresponding frame to the player of the participant, and the player of the participant performs superposition processing on the fourth-layer video information of the corresponding amplified region in the corresponding frame and the first-layer video information, and then locally caches the fourth operation command, where the fourth operation command includes a large-scale amplification instruction.
Preferably, the local amplifying instruction includes amplifying the resolution of the picture by 2 times for use in observing the effect of the local scene, and the large amplifying instruction includes amplifying the resolution of the picture by 4 times or 8 times for use in observing the effect of the detail.
Preferably, the method for controlling the video over-film includes an independent video generating step, wherein the independent video generating step includes generating an independent video by using video content cached on a player of a participant, and the independent video includes first-layer video information, alpha-layer video information, third-layer video information and fourth-layer video information processed by an operation command.
Preferably, the control system includes a tagged video generation policy that includes adding meeting information including a participant name, meeting time, meeting name, and access IP to video content cached on players of the participants to generate the tagged video.
Preferably, the marked video is added by a method of visible light watermarking or invisible dark watermarking.
Compared with the prior art, the invention has the beneficial effects that:
the invention calls the layered video information with different quality according to different operations in the process of passing the film, so that the high-quality video information can be used only when fine operations such as local amplification and the like are carried out, thereby greatly reducing the transmission requirement on a bottom network, and simultaneously, the safety is greatly improved because only the information of an amplifying area is transmitted.
The invention separates the video data from the operation of the operator by adopting the control mode of the synchronous operation command, only transmits the synchronous operation command in the actual synchronous slicing, and solves the problems of system delay and unstable image quality during slicing.
Drawings
FIG. 1 is a connection block diagram of a video-level remote synchronous film-passing control method of the present invention;
FIG. 2 is a schematic diagram showing a layered video presentation in a video-level remote synchronous film-passing control method according to the present invention;
fig. 3 is a schematic diagram of a film-passing flow in a film-level remote synchronous film-passing control method according to the present invention.
In the figure: 101. first layer video information; 102. alpha layer video information; 103. third layer video information; 104. fourth layer video information.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1, a first embodiment of the present invention provides a video-level remote synchronous film-passing control method, which includes a video processing step S101, where the video processing step includes processing an original lossless video to generate at least four layered video information with different image quality, and synthesizing all the layered video information with different image quality according to a preset method to generate the original lossless video, where the layered video information includes a first layer video information 101, an Alpha layer video information 102, a third layer video information 103 and a fourth layer video information 104, where the image quality sequentially increases;
the method for controlling the over-chip comprises the following step S102: generating a corresponding color matching preset table according to the original lossless video, sending the color matching preset table and the first-layer video information 101 to a player of a participant, and carrying out local caching on the player;
the method for controlling the video passing provides a control system, wherein the control system is stored with original lossless video, first-layer video information 101, alpha-layer video information 102, third-layer video information 103 and fourth-layer video information 104, and the control system is electrically connected with players of participants;
the method for controlling the over-chip further comprises step S103: designating one participant as an operator, editing videos on the players by the other participants, calling the first-layer video information 101, the Alpha-layer video information 102, the third-layer video information 103 or the fourth-layer video information 104 by the control system according to an operation command of the operator, and synchronously controlling the players of the participants to execute corresponding operations according to the operation command of the operator. The layered video information with the video quality required to be used is called according to different operations in the process of passing, so that the high-quality video information can be used only when fine operations such as local amplification and the like are carried out, the transmission requirement on a bottom network is greatly reduced, and meanwhile, the safety is greatly improved because only the information of an amplifying area is transmitted.
Preferably, the control system is configured with a synchronization control strategy, and the synchronization control strategy includes step S104: the player of the operating party acquires and identifies the operating command of the operating party, synchronously transmits the identified operating command to the player of the participant, and executes corresponding operation according to the identified operating command.
Specifically, the control method for the film passing provided by the invention is based on the original lossless video which needs film passing, and the control system generates a color preset table required by preparation; in the film and television film, the first layer information and the color preset table are mainly used for film and television film, such as overall layout, effect, overall effect and the like of the overall creative of the video and the model.
And then the system generates an Alpha compression layer according to the original lossless video to be processed, wherein the Alpha compression layer is mainly used for adjusting the permeation effect of the video in the video processing.
The third layer of information is mainly used when the video is locally amplified, and is generally about 2 times of the normal playing effect, and mainly used for observing the effect of some local scenes. The fourth layer of information is mainly used for greatly amplifying the video, is generally 4 to 8 times of the normal playing effect, and is mainly used for observing detail effects, such as small details of edges of people, hairs, noise points and the like.
Step S105: when the operation command is identified as belonging to the first operation command, the player of the participant performs a corresponding operation on the first layer video information 101 according to the identified operation command, wherein the first operation command comprises fast forward, play and pause.
Step S106: when the operation command is identified to belong to the second operation command, the player of the operator extracts an operation area corresponding to the second operation command, and transmits Alpha-layer video information 102 of the corresponding operation area to the player of the participant, and the player of the participant performs the superposition processing on the Alpha-layer video information 102 of the corresponding operation area and the first-layer video information 101 and then locally caches the Alpha-layer video information, wherein the second operation command comprises a color adjustment instruction.
Step S107: when the operation command is identified to belong to the third operation command, the player of the operator extracts the frame corresponding to the third operation command, and transmits the third layer video information 103 of the corresponding frame to the player of the participant, and the player of the participant performs the superposition processing on the third layer video information 103 of the corresponding frame and the first layer video information 101 and then locally caches the third operation command, wherein the third operation command comprises a local amplification instruction.
Step S108: when the operation command is identified to belong to the fourth operation command, the player of the operator extracts the corresponding amplified region in the frame corresponding to the fourth operation command, and transmits the fourth-layer video information 104 of the corresponding amplified region in the corresponding frame to the player of the participant, and the player of the participant performs the superposition processing on the fourth-layer video information 104 of the corresponding amplified region in the corresponding frame and the first-layer video information 101, and then locally caches the fourth operation command, wherein the fourth operation command comprises a large-scale amplification instruction.
As shown in fig. 2, which is a schematic diagram illustrating layered video presentation in the present invention, the first layer video information 101 belongs to a conventional network high definition layer, and may be h.264/h.265; the Alpha Layer video information 102, namely the Alpha Layer, can adopt a H.264/H.265 compression algorithm; the third layer of video information 103 is high quality information, and can adopt high-fidelity image compression modes such as JPEG2000 and the like; the fourth layer of video information 104 is lossless information, and a lossless image compression algorithm similar to JPEG-LS may be used.
As shown in fig. 3, in the present invention, a system sends a command directly to a player of a participant, and the player controls a local cache video, so that in the conference process, the video itself does not need to be transmitted, only the control command needs to be transmitted, not only improving the video quality when adjusting the video detail effect, but also ensuring the video safety performance in the process of video passing, and greatly reducing the transmission requirement on a bottom network; the implementation mode of the system can be point-to-point or can be realized by adopting a link mode of a client server.
Preferably, the local amplifying instruction comprises 2 times of speed playing for use in observing the effect of the local scene, and the large amplifying instruction comprises 4 times of speed playing or 8 times of speed playing for use in observing the effect of the detail.
Preferably, the over-film control method includes an independent video generating step, where the independent video generating step includes generating an independent video by using video content cached on a player of a participant, where the independent video includes first layer video information 101, alpha layer video information 102, third layer video information 103, and fourth layer video information 104 processed by an operation command.
Preferably, the control system comprises a marked video generation strategy comprising adding participant information to the video content cached on players of participants to generate a marked video, the participant information comprising participant name, meeting time, meeting name and access IP, the marked video being added by means of a visible bright watermark or invisible dark watermark, so that once there is a video leak, the responsible party can be found very simply.
The invention separates the video data from the operation of the operator by adopting the control mode of the synchronous operation command, only transmits the synchronous operation command in the actual synchronous slicing, and solves the problems of system delay and unstable image quality during slicing.
Working principle: the invention comprises the following steps: when the video is in the film, the system sends the first layer video to the player of the participant in the film, and allows the player to cache the first layer video.
The system transmits the corresponding color matching preset table to players of the participants, and allows the players to cache the color matching preset table.
After the first layer of video and the color matching preset table are successfully cached on the system of the participants, the system indicates that the conference can be started.
In the conference process, the participants specify an operating party according to specific conference requirements, and other participants are participants. When an operator operates the video, such as fast forward, play, pause and the like, the system directly sends a command to a player of a participant, and the player correspondingly controls the locally cached video, so that the video does not need to be transmitted in the conference process, and only the control command needs to be transmitted;
in the conference process, if the operator needs to adjust the video color, the player of the participant will also transmit the Alpha layer of the corresponding video area according to the specific operation command of the operator, and then superimpose the Alpha layer information with the first layer information. And then, carrying out operation on the superimposed information and the locally cached color preset table to realize color change, wherein like the step 6, only the command is transmitted, and when meeting personnel need to carry out detail inspection on local areas in the meeting process, the system transmits the information of the third layer and the fourth layer of the corresponding areas in the corresponding frames to the meeting personnel. Because only part of the amplifying area of the current frame is visible after the corresponding video is amplified, the invention only transmits the third and fourth layer information of the amplifying area instead of the third and fourth layer information of the whole frame in the part, thereby greatly reducing the requirement on the bottom network, and simultaneously, greatly improving the safety because only the information of the amplifying area is transmitted instead of the whole frame information.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (6)
1. A film and television remote synchronous film passing control method is characterized in that: the method comprises a video processing step, wherein the video processing step comprises the steps of processing an original lossless video to generate at least four layered video information with different image quality, and synthesizing all the layered video information with different image quality according to a preset method to generate the original lossless video, wherein the layered video information comprises a first layer video information (101), an Alpha layer video information (102), a third layer video information (103) and a fourth layer video information (104) with sequentially increasing image quality;
the method for controlling the video passing comprises the steps of generating a corresponding color matching preset table according to an original lossless video, sending the color matching preset table and first-layer video information (101) to a player of a participant, and carrying out local caching on the player;
the method for controlling the video passing comprises the steps that a control system is provided, original lossless video, first-layer video information (101), alpha-layer video information (102), third-layer video information (103) and fourth-layer video information (104) are stored in the control system, and the control system is electrically connected with players of participants;
the control system calls the first layer video information (101), the Alpha layer video information (102), the third layer video information (103) or the fourth layer video information (104) according to the operation command of the operating party, and synchronously controls the player of the participant to execute corresponding operation according to the operation command of the operating party;
when the operation command is identified to belong to a first operation command, the player of the participant executes corresponding operation on the first layer video information (101) according to the identified operation command, wherein the first operation command comprises fast forward, play and pause;
when the operation command is identified to belong to a second operation command, the player of the operator extracts an operation area corresponding to the second operation command, and transmits Alpha-layer video information (102) of the corresponding operation area to the player of the participant, and the player of the participant performs superposition processing on the Alpha-layer video information (102) of the corresponding operation area and the first-layer video information (101) and then locally caches the Alpha-layer video information, wherein the second operation command comprises a color adjustment instruction;
when the operation command is identified to belong to a fourth operation command, the player of the operator extracts a corresponding amplifying region in a frame picture corresponding to the fourth operation command, and transmits fourth-layer video information (104) of the corresponding amplifying region in the corresponding frame picture to the player of the participant, and the player of the participant performs superposition processing on the fourth-layer video information (104) of the corresponding amplifying region in the corresponding frame picture and the first-layer video information (101) and then locally caches the fourth-layer video information, wherein the fourth operation command comprises a large-scale amplifying instruction;
when the operation command is identified to belong to a third operation command, the player of the operator extracts a frame picture corresponding to the third operation command and transmits third-layer video information (103) of the corresponding frame picture to the player of the participant, and the player of the participant performs superposition processing on the third-layer video information (103) of the corresponding frame picture and the first-layer video information (101) and then locally caches the third operation command, wherein the third operation command comprises a local amplification instruction;
in the conference process, if the operator needs to adjust the video color, the player of the participant will also transmit Alpha layer video information (102) of the corresponding video area according to the specific operation command of the operator, then superimpose the Alpha layer video information (102) with the first layer video information (101), and when the participant needs to perform detail inspection on the local area, the system transmits third layer video information (103) and fourth layer video information (104) of the corresponding area in the corresponding frame to the participant.
2. The method for remotely synchronizing film and television level and controlling film and television level according to claim 1, wherein the method comprises the following steps: the control system is configured with a synchronous control strategy, the synchronous control strategy comprises the steps of acquiring and identifying an operation command of an operator through a player of the operator, synchronously transmitting the identified operation command to a player of a participant, and executing corresponding operation by the player of the participant according to the identified operation command.
3. The method for remotely synchronizing film and television over-film control according to claim 2, wherein the method comprises the steps of: the local amplifying instruction comprises 2 times of speed playing for use in observing the effect of the local scene, and the large-scale amplifying instruction comprises 4 times of speed playing or 8 times of speed playing for use in observing the effect of the detail.
4. The method for remotely synchronizing film and television level and controlling film and television level according to claim 1, wherein the method comprises the following steps: the video-over control method comprises an independent video generation step, wherein the independent video generation step comprises the step of generating independent videos by utilizing video content cached on players of participants, and the independent videos comprise first-layer video information (101), alpha-layer video information (102), third-layer video information (103) and fourth-layer video information (104) which are processed by operation commands.
5. The method for remotely synchronizing film and television over-film control according to claim 4, wherein the method comprises the steps of: the control system includes a tagged video generation policy that includes adding meeting information including a participant name, a meeting time, a meeting name, and an access IP to video content cached on a player of the participant to generate a tagged video.
6. The method for remotely synchronizing film and television over-film control according to claim 5, wherein the method comprises the steps of: the marked video is added by adopting a method of visible bright watermark or invisible dark watermark.
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