CN113206853A - Video correction result storage improvement method - Google Patents
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- CN113206853A CN113206853A CN202110497841.8A CN202110497841A CN113206853A CN 113206853 A CN113206853 A CN 113206853A CN 202110497841 A CN202110497841 A CN 202110497841A CN 113206853 A CN113206853 A CN 113206853A
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- 238000012937 correction Methods 0.000 title claims abstract description 24
- 230000002194 synthesizing effect Effects 0.000 claims abstract description 6
- 238000012986 modification Methods 0.000 claims description 7
- 230000004048 modification Effects 0.000 claims description 7
- 230000005540 biological transmission Effects 0.000 claims description 5
- 238000012545 processing Methods 0.000 claims description 3
- 238000009877 rendering Methods 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000012634 fragment Substances 0.000 description 2
- 238000010422 painting Methods 0.000 description 2
- 238000012549 training Methods 0.000 description 2
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/60—Network streaming of media packets
- H04L65/75—Media network packet handling
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/70—Information retrieval; Database structures therefor; File system structures therefor of video data
- G06F16/78—Retrieval characterised by using metadata, e.g. metadata not derived from the content or metadata generated manually
- G06F16/783—Retrieval characterised by using metadata, e.g. metadata not derived from the content or metadata generated manually using metadata automatically derived from the content
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F40/00—Handling natural language data
- G06F40/20—Natural language analysis
- G06F40/205—Parsing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/60—Network streaming of media packets
- H04L65/70—Media network packetisation
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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]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/21—Server components or server architectures
- H04N21/218—Source of audio or video content, e.g. local disk arrays
- H04N21/2187—Live feed
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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]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/231—Content storage operation, e.g. caching movies for short term storage, replicating data over plural servers, prioritizing data for deletion
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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]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/234—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs
- H04N21/23418—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs involving operations for analysing video streams, e.g. detecting features or characteristics
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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]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/234—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs
- H04N21/2343—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements
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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]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/236—Assembling of a multiplex stream, e.g. transport stream, by combining a video stream with other content or additional data, e.g. inserting a URL [Uniform Resource Locator] into a video stream, multiplexing software data into a video stream; Remultiplexing of multiplex streams; Insertion of stuffing bits into the multiplex stream, e.g. to obtain a constant bit-rate; Assembling of a packetised elementary stream
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Abstract
The invention discloses a video correction result storage improving method. The method specifically comprises the following steps: (1) separating the original Video into Video data Video and Audio data Audio 1; (2) converting characters into Subtitle tracks in TS; (3) the brush adopts SEI in TS to record; (4) recording the recording information to an Audio2 track in the TS; (5) synthesizing all information into a new video file through a Mux module; (6) and deleting the original video file and saving the original video file by adopting the newly output video file. The invention has the beneficial effects that: the switching requirement of the original video and the correction information is met by the same video according to the requirement, only one video file is needed to be reserved, the switching requirement of the original video and the correction information is met by minimum storage, and therefore the requirement of different scenes is met by the seamless switching of the original video and the correction result information by only one video file can be saved.
Description
Technical Field
The invention relates to the technical field related to new media practical training application, in particular to a method for storing and improving a video correction result.
Background
For the practical training works of new media, the video is taken as the main part, and when a teacher corrects the work, the correction can be more convenient and faster if the teacher can read the work at the same time, and the problem can be more accurately described. The video correction technology requires the simultaneous existence of video playing and correction functions, and the correction has the functions of text, painting brush and recording and can carry out conventional operations such as modification and cancellation; after the video correction is finished, only corrected fragments can be output, so that students can conveniently look up the corrected fragments, and the problem positioning is accurate.
At present, two ways are mainly adopted for storing results after correction is completed, one way is to respectively record and record a text, a painting brush and a recording function into an independent file, the whole operation process is stored in an engineering way, the project file information is analyzed in the playing process of a player end, and a corresponding function recording file is obtained to be synthesized and displayed, and the way needs to adopt a background service system to manage different output files and interact with a front-end player through a complex interface. And the other method is to synthesize the whole process into an independent new video file, which solves the problems of excessive stored files and complex background, but needs a huge and complex transcoding system for supporting, and needs more storage to store the new video file.
Disclosure of Invention
The invention provides a video correction result storage and improvement method for seamless switching of original video and correction result information, aiming at overcoming the defects in the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme:
a video correction result storage improvement method specifically comprises the following steps:
(1) separating the original Video into Video data Video and Audio data Audio 1;
(2) converting characters into Subtitle tracks in TS;
(3) the brush adopts SEI in TS to record;
(4) recording the recording information to an Audio2 track in the TS;
(5) synthesizing all information into a new video file through a Mux module;
(6) and deleting the original video file and saving the original video file by adopting the newly output video file.
When a player is used for requesting a video file, the player separates data according to TS standard, and the data is different according to the logged-in roles, such as students: (1) synthesizing the Video, the subtitle and the SEI into a picture for display; (2) audio1 and Audio2 are output through sound mixing; as a teacher: (1) only the Video is taken for picture display; (2) only Audio1 is taken for output. Through the process, the same video meets the switching requirement of the original video and the correction information according to the requirement, only one video file needs to be reserved, and the switching requirement of the original video and the correction information is met through minimum storage. Through the technical scheme of the invention, only one video file can be stored so as to achieve seamless switching of the same batch modification result information of the original video and meet the requirements of different scenes.
Preferably, in the step (2), specifically: characters are encoded by UTF-8, a Subtitle track is added in a TS in a standard mode of a Web video text track format, and the content and time point information of the characters are all recorded in the Subtitle track.
Preferably, in step (2), the format of the Web video text track is specifically as follows: the first line starts with time, which is the start time and end time of the text showing below, in units of seconds, milliseconds, and strings for binning the start time and end time; the second line records the text content that appears, one or more hyphenated lines, each containing the text to be displayed, allowing multiple lines of content to be recorded, each line of content having to be preceded by one or more hyphenates.
Preferably, in the step (3), specifically: the method comprises the steps that in the brush pen operation process, information of a brush pen and an operation path are recorded through an XML or JSON formatted text, a recorded file is written into SEI in a TS, the SEI is in H264 and H265 standard formats, when the payload type of the SEI is 5 according to the standard, data are represented as custom data, the brush pen information is recorded into a video stream in the mode, and the recording mode is carried out on each frame of video or IDR interval processing.
Preferably, in the step (4), specifically: the recording process adopts AAC general Audio coding format, converts the signal input by the sound collecting device into general Audio coding data stream, and the data stream is recorded into Audio2 track in TS.
Preferably, in the step (5), specifically: the Mux module outputs each stream into a new independent video file by adopting the standard TS stream multiplexing requirement for all information.
Preferably, in step (6), since the video and sound of the original video file are synthesized in a transparent transmission manner, there is no decoding and encoding work in the middle, and the Subtitle, SEI and Audio2 have no encoding requirement, and finally only one video file is reserved. Only one video file is finally reserved through the process, and because the video and the sound of the original video are synthesized in a transparent transmission mode, decoding and encoding work does not exist in the middle, the quality of the video is guaranteed to be unchanged, and Subtitle, SEI and Audio2 have no encoding requirements, the whole output speed is very high and can basically reach 60 times, namely 1 hour of video can be completed in only 1 minute.
Preferably, in the video playing process, analyzing and recording Web video text track format data recorded in the subtitle in real time; when the video playing time reaches the start time and the end time of the data, the originally recorded text content is synthesized into the video in real time; after the information in the SEI of the currently played corresponding frame is analyzed, rendering the brush information and the path into the video in real time; through the process, the same video can meet the switching requirement of the original video and the batch modification information according to the requirement.
The invention has the beneficial effects that: the switching requirement of the original video and the correction information is met by the same video according to the requirement, only one video file is needed to be reserved, the switching requirement of the original video and the correction information is met by minimum storage, and therefore the requirement of different scenes is met by the seamless switching of the original video and the correction result information by only one video file can be saved.
Drawings
FIG. 1 is a schematic of the process of the present invention;
fig. 2 is a schematic diagram of the playing method of the present invention.
Detailed Description
The invention is further described with reference to the following figures and detailed description.
In the embodiment shown in fig. 1, a method for storing and improving a video modification result specifically includes the following steps:
(1) separating the original Video into Video data Video and Audio data Audio 1;
(2) text is converted into Subtitle tracks in TS (transport stream); the method specifically comprises the following steps: characters are encoded by UTF-8, a Subtitle track is added in a TS in a standard mode of a Web video track format (WebVTT), and the content and time point information of the characters are all recorded in the Subtitle track.
The format of the Web video text track is specifically as follows:
00:01.000-->00:04.000
-focus attention.
00:05.000-->00:09.000
-a test point.
To recite.
The first line starts with time, which is the start time and end time of the text showing what appears below, in units of minutes, seconds, milliseconds, and a string- - > for binning the start time and end time.
The second line records the text content that appears, one or more lines starting with hyphen (-), each line containing the text to be displayed, allowing to record a plurality of lines of content, each line having to start with one or more hyphens (-).
(3) The brush is recorded by SEI (supplemental Enhancement information) in TS (transport stream); the method specifically comprises the following steps: the method comprises the steps that in the brush pen operation process, information of a brush pen and an operation path are recorded through an XML or JSON formatted text, a recorded file is written into SEI in a TS, the SEI is in H264 and H265 standard formats, when the payload type of the SEI is 5 according to the standard, data are represented as custom data, the brush pen information is recorded into a video stream in the mode, and the recording mode is carried out on each frame of video or IDR interval processing.
(4) Recording the recording information to Audio2 track in TS (transport stream); the method specifically comprises the following steps: the recording process adopts AAC general Audio coding format, converts the signal input by the sound collecting device into general Audio coding data stream, and the data stream is recorded into Audio2 track in TS.
(5) Synthesizing all information into a new video file through a Mux module; the method specifically comprises the following steps: the Mux module outputs each stream into a new independent video file by adopting the standard TS stream multiplexing requirement for all information.
(6) Deleting the original video file and saving the original video file by adopting a newly output video file; because the video and the sound of the original video file are synthesized by adopting a transparent transmission mode, the decoding and encoding work does not exist in the middle, and the Subtitle, the SEI and the Audio2 have no encoding requirement, and only one video file is finally reserved. Because the video and the sound of the original video are synthesized in a transparent transmission mode, no decoding and encoding work exists in the middle, the quality of the video is guaranteed to be unchanged, and the Subtitle, the SEI and the Audio2 have no encoding requirements, the whole output speed is very high and can basically reach 60 times, namely, the 1-hour video can be finished in only 1 minute.
As shown in fig. 2, when a new video file is requested using a player, the player separates data according to the TS standard, and differs according to the role of login, such as a student: (1) synthesizing the Video, the subtitle and the SEI into a picture for display; (2) audio1 and Audio2 are output through sound mixing; as a teacher: (1) only the Video is taken for picture display; (2) only Audio1 is taken for output. Analyzing and recording Web video text track format data recorded in a subtitle in real time in the video playing process; when the video playing time reaches the start time and the end time of the data, the originally recorded text content is synthesized into the video in real time; after the information in the SEI of the currently played corresponding frame is analyzed, rendering the brush information and the path into the video in real time; through the process, the same video meets the switching requirement of the original video and the correction information according to the requirement, only one video file needs to be reserved, and the switching requirement of the original video and the correction information is met through minimum storage. Through the technical scheme of the invention, only one video file can be stored so as to achieve seamless switching of the same batch modification result information of the original video and meet the requirements of different scenes.
Claims (8)
1. A video correction result storage improvement method is characterized by comprising the following steps:
(1) separating the original Video into Video data Video and Audio data Audio 1;
(2) converting characters into Subtitle tracks in TS;
(3) the brush adopts SEI in TS to record;
(4) recording the recording information to an Audio2 track in the TS;
(5) synthesizing all information into a new video file through a Mux module;
(6) and deleting the original video file and saving the original video file by adopting the newly output video file.
2. The method as claimed in claim 1, wherein in the step (2), the steps are as follows: characters are encoded by UTF-8, a Subtitle track is added in a TS in a standard mode of a Web video text track format, and the content and time point information of the characters are all recorded in the Subtitle track.
3. The method as claimed in claim 2, wherein in step (2), the format of the Web video text track is as follows: the first line starts with time, which is the start time and end time of the text showing below, in units of seconds, milliseconds, and strings for binning the start time and end time; the second line records the text content that appears, one or more hyphenated lines, each containing the text to be displayed, allowing multiple lines of content to be recorded, each line of content having to be preceded by one or more hyphenates.
4. The method as claimed in claim 1, wherein in step (3), the method specifically comprises: the method comprises the steps that in the brush pen operation process, information of a brush pen and an operation path are recorded through an XML or JSON formatted text, a recorded file is written into SEI in a TS, the SEI is in H264 and H265 standard formats, when the payload type of the SEI is 5 according to the standard, data are represented as custom data, the brush pen information is recorded into a video stream in the mode, and the recording mode is carried out on each frame of video or IDR interval processing.
5. The method for storing and improving video modification results as claimed in claim 1, wherein in the step (4), the steps are specifically as follows: the recording process adopts AAC general Audio coding format, converts the signal input by the sound collecting device into general Audio coding data stream, and the data stream is recorded into Audio2 track in TS.
6. The method as claimed in claim 1, wherein in step (5), the method specifically comprises: the Mux module outputs each stream into a new independent video file by adopting the standard TS stream multiplexing requirement for all information.
7. The method as claimed in claim 1, wherein in step (6), since the video and Audio of the original video file are synthesized by transparent transmission, there is no decoding and encoding in between, and the Subtitle, SEI and Audio2 have no encoding requirement, and only one video file is finally reserved.
8. The method according to claim 1, wherein the Web video text track format data recorded in the subtitle is parsed in real time during the video playing process; when the video playing time reaches the start time and the end time of the data, the originally recorded text content is synthesized into the video in real time; after the information in the SEI of the currently played corresponding frame is analyzed, rendering the brush information and the path into the video in real time; through the process, the same video can meet the switching requirement of the original video and the batch modification information according to the requirement.
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