CN103905744B - Rendering synthesis method and system - Google Patents
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- CN103905744B CN103905744B CN201410145373.8A CN201410145373A CN103905744B CN 103905744 B CN103905744 B CN 103905744B CN 201410145373 A CN201410145373 A CN 201410145373A CN 103905744 B CN103905744 B CN 103905744B
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- 238000009877 rendering Methods 0.000 title claims abstract description 38
- 238000001308 synthesis method Methods 0.000 title abstract 2
- 238000000034 method Methods 0.000 claims abstract description 21
- 230000015572 biosynthetic process Effects 0.000 claims description 22
- 238000003786 synthesis reaction Methods 0.000 claims description 22
- 238000010189 synthetic method Methods 0.000 claims description 10
- 230000002194 synthesizing effect Effects 0.000 abstract description 2
- 230000008569 process Effects 0.000 description 7
- 230000008859 change Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000001151 other effect Effects 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- 241001269238 Data Species 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000000644 propagated effect Effects 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 239000002131 composite material Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000007115 recruitment Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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Abstract
The invention provides a rendering synthesis method and a system, wherein the method provided by the invention comprises the following steps: and loading the video and audio files, and calling the CPU to decode frame data of the frame pictures of the video and audio files to obtain video and audio picture data when the subtitle files are selected to be loaded and opened. And meanwhile, calling a GPU rendering engine to render the information contained in the subtitle file. Then, the GPU rendering engine synthesizes, superposes and renders the video and audio image data and the rendered subtitle data, and superposes the subtitle on the video and audio image. In addition, the invention also correspondingly provides a rendering and synthesizing system according to the provided method. By adopting the method and the system provided by the invention, the subtitle picture can be adaptively adjusted along with the changes of the maximization minimization and the like of the video player window, the definition of the subtitle picture is ensured, and the browsing experience of a user is improved.
Description
Technical field
The present invention relates to field of broadcast televisions, synthesis is rendered more specifically to video and audio file and subtitle file
Method and system.
Background technology
With developing rapidly for information technology, broadcasting media channel and audient are also more and more extensively and diversified, used as matchmaker
The core force that body is propagated, TV station will also consider channel and the audient to be propagated in program production process.Such as, equally
News program when TV station different channel is broadcasted or when being broadcasted towards different audients, it is necessary to show different captions or
Different languages of identical caption content etc., such as captions are identical but be different local languages.Production before program broadcast
Make with during storage management, such as storage of program material, lookup is remake, send and broadcast production link with preview, program
In, often it is accomplished by carrying out respective handling to different captions different languages.Therefore, TV station is same in the making of program regards
Frequency picture often just has multiple difference captions, or needs to change different captions in video replay.Consequently, it is possible to such as
What efficiently manages these video files and subtitle file, is exactly that TV station needs to face while being also in multimedia asset management
Need the problem for solving.
At present in the TV station of radio, TV and film industries, all by media asset management system to files such as media audio/video programs
It is managed.But all it is often unification management, such as video and audio file and word when management multi-version captions and video
Curtain file binding, directly will carry out packing transcoding, after so synthesizing when program making in subtitle superposition to video pictures
File when be saved in media asset management system with regard to only one of which program file, subtitle file be not it is independent, this
It is unfavorable for subsequently editing again.Simultaneously as media resource system subsequently needs the retrieval for providing video and audio for user to browse etc. function,
In view of reducing volume of transmitted data and reducing bandwidth, the video and audio of high standard definition code check file high is being saved in the same of media resource system
When need to carry out the conversion of low bit- rate, and the low bit- rate after thus changing is also video pictures be directly synthesized with captions together with
File.
Fig. 3 is the caption managed process schematic of video/audio of prior art.As shown in figure 3, working as to enter in media resource system
When row lookup is browsed, the low bit-rate video file of overlapping text can only be browsed.Also, because subtitle file has been synthesized to
On video, can only by CPU calculate carry out video decoding and picture render, it is impossible to make full use of the computing resources such as GPU.When this
When program there are multiple subtitle files, the selection of subtitle file cannot be also carried out, subtitle file can only be changed from Program Making System
Synthesis is remake, then by the conversion of low bit- rate again, media resource system is saved in.
But one of function of media resource system is exactly in order to business department carries out lookup recycling to the video and audio material for preserving.
When media resource system wishes that reusing the program is remake or broadcasted again, then video pictures have been folded in itself
Captions are added, producer cannot obtain the pure original video pictures without captions.This namely we often in TV
On see some programs lower section the fuzzy regions such as mosaic occur, then in this fuzzy region again covered it again
The reason for his captions.
Certainly, TV station's service management department also uses the mode that video material with captions separate, i.e. program making and closes
Into when a synthetic video and audio file, and subtitle file is not also changed when changing low bit- rate, so, be saved in matchmaker's money
Just there are high standard definition video and audio file, subtitle file and low bit- rate file when system respectively.But work as is carried out in media resource system
The lookup of program and when browse, it is impossible to browsed simultaneously to subtitle file, subtitle file can only be used as independent annex
Storage, it is impossible to provide effective reference information to user, and video pictures when browsing equally be by CPU carry out decoding and
Render, cannot equally make full use of GPU computing resources.
The above, is prior art problem encountered.If carrying out a program to each subtitle file
Making synthesis and low bit- rate conversion, then be undoubtedly reduction to production efficiency and the efficiency of management, while improving production process
In recruitment cost.In addition, cannot also retain original video pictures, to later video and audio material, Commercial cultivation leaves again
It is sorry.If being saved in media resource system by the way of material picture is separated with captions, again cannot to user provide in real time,
Intuitively captions reference information, user can only check caption content by way of third party software opens subtitle file, but
So again it cannot be guaranteed that the demand of caption information and video and audio picture synchronization, also brings to user and use inconvenience and puzzlement.
The content of the invention
The present invention is regarding to the issue above, it is proposed that one kind renders synthetic method and system, the present invention make full use of CPU with
GPU computing resources, are that user retrieves when browsing low bit- rate file in media resource system, there is provided when one kind is supported to be browsed according to user
The change of player window and the method and system of real-time rendering image content, at the same ensure captions, picture stringent synchronization with
And the high-fidelity of rendered picture.
In one aspect, synthetic method is rendered the invention provides one kind, is comprised the following steps：Loading video and audio file,
When selection is loaded and opens subtitle file, call CPU to carry out frame data decoding to the frame picture of video and audio file, obtain regarding sound
Frequency picture data.Meanwhile, call GPU rendering engines to render the information that subtitle file is included.Then, rendered by GPU and drawn
Hold up to video and audio picture data and render the caption data for obtaining carry out synthesis superposition render, by subtitle superposition to video and audio draw
On face.
Preferably, what the present invention was provided renders synthetic method, when subtitle file is not loaded with selection, then directly invokes
Video and audio picture after CPU is decoded it carries out CPU and renders, so as to complete the treatment of video and audio picture.
In another aspect, synthesis system, including CPU video-audio decoders and GPU are rendered present invention also offers one kind
Rendering engine, wherein CPU video-audio decoders are used to carry out frame data decoding to the frame picture of video and audio file；And GPU wash with watercolours
Dye engine is used to render the information that subtitle file is included, and to the video and audio picture data that obtains of decoding and renders
To caption data carry out synthesis superposition render.
Preferably, the CPU video-audio decoders for rendering synthesis system that the present invention is provided are additionally operable to, literary when captions are not loaded with
During part, video and audio is decoded and CPU is rendered, so as to complete the treatment of video and audio picture.
What the present invention was provided render synthetic method and system makes full use of CPU and GPU computing resources, combined calculation simultaneously to render
Technology, subtitle file is individually rendered so that video file remains the picture of most original, be follow-up business system pair
There is provided more complete original video information during program recycling, and simplify the operation during program making.And this
The method and system that invention is provided can directly be superimposed new captions synthesis on original video and browse.Further, since the present invention is used
Rendering engine, and take full advantage of GPU computing resources, the captions for making when rendering can according to the size of video pictures, background,
Contrast, brightness come size, position, color, font, transparency of real-time adjustment captions and other effects.Make captions picture with regarding
The maximization of frequency player window the change such as minimizes and self-adaptative adjustment, and ensures the definition of captions picture, improves
User's viewing experience.
Brief description of the drawings
Specific embodiment of the invention is described below with reference to accompanying drawings, wherein：
Fig. 1 is audio picture of the invention and captions separation management process schematic.
Fig. 2 for the present invention provide method the step of flow chart.
Fig. 3 is the caption managed process schematic of video/audio of prior art.
Specific embodiment
In order that technical scheme and advantage become more apparent, below in conjunction with accompanying drawing to of the invention exemplary
Embodiment is described in more detail, it is clear that described embodiment is only a part of embodiment of the invention, rather than
The exhaustion of all embodiments.
The method and system that the present invention is provided are mainly used in media asset management system, are used when user browses.Due to
Present invention employs CPU and GPU combined calculations and the technology that renders, subtitle file is individually rendered so that video file
The picture of most original is remained, more complete original video information is provided when being recycled to the program for follow-up business system,
And simplify the operation during program making.It is in order to achieve the above object, of the invention in early stage program making building-up process,
Using the video and audio picture and captions separation management of material, so that clear after new captions and synthesis can be directly superimposed on original video
Look at.Audio picture is described in detail with the process of captions separation management with reference to Fig. 1.
Fig. 1 is audio picture of the invention and captions separation management process schematic, as shown in figure 1, step S101, will be right
The video file and audio file answered synthesize video and audio file.Certainly, in the case, this video and audio file is with audio
Video file.But, in fact, herein, video and audio file can also be without the video file of audio, such as in nothing
In the case of audio.Then, then by step S102, video and audio file transcoding is generated into low bit- rate file.
Wherein, selection generates low bit- rate file in step s 102, is because media resource system is used when browsing
The low bit- rate of 640*360 resolution ratio, can avoid captions from being directly synthesized video and be displayed in full screen on the high-clear displays such as 1920*1080
When, the information such as captions will seem fuzzy distortion, it is possible that situations such as mosaic, influenceing the viewing body of user when serious
Test.
Finally, perform step S103, will the low bit- rate file of video and audio file generated be saved in media asset management system
In system, meanwhile, subtitle file is saved directly in media asset system without treatment.Wherein, need to retain phase in subtitle file
The time-code information answered, and using the organizational form of " access point, go out point, word " more than the time-code information of general captions.The present invention is supported
The subtitle file of various different-formats, such as SRT, XML, TXT, DLG subtitle file form.The xm1 for for example being supported in the present invention
Subtitle file, i.e., using following organizational form.
The SRT subtitle files that for example present invention is supported, using following organizational form.
The resource object for now being managed in media asset system includes that high/standard definition bit-rate video file high, low bit- rate regard sound
Frequency file and subtitle file, for recycling and browsing.
The method and system that the present invention is provided are mainly used in media asset management system, are used when user browses.Use
Family is loaded by selection and opens subtitle file or be not loaded with subtitle file, using this when lookup browses video-audio program
The decoding of CPU video and audios and the final display for browsing picture of GPU rendering engines completion for providing are provided.With reference to Fig. 2 to this
Invent provide method the step of be described in detail, Fig. 2 for the present invention provide method the step of flow chart.
Step S201, checks and loads video and audio file, chooses whether loading caption file.Herein, video and audio text
Part can be corresponding video file and audio file composite document, or without the video file of audio.It is general next
Say, for the video and audio file that video file and audio file synthesize, generally captions are had in media asset management system, such as use
Family is searched to be needed to coordinate corresponding captions when browsing video and audio file, then select loading caption file.And for without audio
Video file, this class file do not have corresponding captions to be loaded, then without considering loading caption file, such as some landscape
Piece, documentary film etc..Certainly, captions need not be coordinated when user searches browses video and audio file, then also without loading caption
File.Video and audio file is just checked and loaded below, chooses whether that two kinds of situations of loading caption file are described in detail.
Such as select to load and open subtitle file, then parallel execution of steps S202 and step S203, that is, call CPU to regarding
The frame picture of audio file carries out frame data decoding, obtains video and audio picture data, and call GPU rendering engines to subtitle file
Comprising information rendered.Step S204, i.e. GPU rendering engines are performed again to the video and audio picture data that obtains of decoding and
Render the caption data for obtaining carry out synthesis superposition render, complete video and audio picture.Wherein, the information that subtitle file is included includes
The corresponding caption character of frame video pictures, the font of captions, color, size, position, transparency and time-code etc..
Specifically, as selection is loaded and opens subtitle file, CPU and GPU computing resources are called, while regarding sound solution to CPU
Code device and GPU rendering engines carry out initialization operation, such as set file path, initialization caching Buffer, load document.
CPU video-audio decoders will carry out frame data decoding to video and audio frame picture by CPU, and can be real-time in decoding process
Obtain " when, minute, second, frame " time-code information of video pictures, no matter played using speed in player or quick seek, depending on
Audio decoder can in real time and accurately get time-code information in decoding.Then, rendering engine searches subtitle file
In corresponding time-code information.After rendering engine gets correspondence time-code information, be first according to video time-code position enquiring whether
Be contained within captions in the time-code, such as contain captions, the captions value that will be inquired by GPU by caption character carry out font, color,
Rendering for size, position, transparency and other effects, is then synthesized the decoded frame video and audio picture datas of CPU by GPU
Superposition is rendered, and in subtitle superposition to video pictures, completes the synthesis of frame picture, final display picture.
Illustrated in the application of actual scene with reference to the present invention, for example, in media asset management system, user
Want to look up and browse a video and audio file on baby growth recording and coordinate captions, wherein, captions text in the present embodiment
Part organizational form is as follows：
User is searched and browses related video and audio, and while loading and opening video and audio file, selection is loaded and opens right
The subtitle file answered, CPU is configured file path, initialization caching Buffer, loading depending on sound decoder and GPU rendering engines
The initialization operations such as file.CPU video-audio decoders will carry out frame data decoding by CPU to video and audio frame picture, for example, working as
Be decoded to baby carries out the frame picture of scribble drawing on the wall, and time-code information 00 is obtained in real time:10:08,039.Rendering engine exists
Searched in subtitle file (subtitle file in the present embodiment is SRT subtitle files) and obtain correspondence time-code information,
Rendering engine gets correspondence time-code information 00:10:After 08,039, time-code position enquiring according to video whether
The time-code is contained within captions.Because the baby on this frame picture carries out scribble drawing on the wall, there is no corresponding dialogue or aside
Captions, therefore, as shown in subtitle file, 00:10:08,039 moment is 00:10:07,039-- ＞ 00:10:13,119 moment
It is interior, there is no captions.Rendering engine is rendered the decoded frame video and audio picture datas of CPU by GPU, completes frame picture,
Final display picture.
And the frame picture that scribble on the wall is painted is completed when baby is decoded to, obtain time-code information 00 in real time:10:14,
033.Rendering engine gets correspondence time-code information 00:00:After 14,033, whether the time-code position enquiring according to video is at this
Code is contained within captions.Baby on this time frame picture completes scribble drawing on the wall, has corresponding side certainly.Therefore, such as captions
Shown in file, 00:00:14,033 moment are 00:10:13,119-- ＞ 00:10:In 22,439 moment, and aside captions are for he
Picture be mostly arbitrary creation.The captions value that rendering engine will be inquired by GPU by caption character carry out font,
Rendering for color, size, position, transparency and other effects, is then entered the decoded frame video and audio picture datas of CPU by GPU
Row synthesis superposition is rendered, and in subtitle superposition to video pictures, completes the synthesis of frame picture, final display picture.
As selection is not loaded with subtitle file, then step S205 is performed, directly invoking CPU carries out video and audio decoding, and to solution
Video and audio picture after code is rendered.
Correspondingly, with reference to the above method, synthesis system is rendered the invention allows for one kind, including：CPU video and audios are decoded
Device and GPU rendering engines.Wherein, CPU video-audio decoders, for carrying out frame data decoding per frame picture to video and audio；GPU
Rendering engine, for being rendered to the information that subtitle file is included, and the video and audio picture decoded with CPU video-audio decoders
Data carry out synthesis superposition and render.Additionally, after CPU video-audio decoders carry out frame data decoding to video and audio, also to decoding after
Video and audio picture carry out rendering synthesis.
The method and system that the present invention is provided use rendering engine, and take full advantage of GPU computing resources, and the captions for making exist
Can be according to the size of video pictures, background, contrast, brightness come the size of real-time adjustment captions, position, color, word when rendering
Body, transparency and other effects, as the maximization of video player window such as minimizes at change and the self-adaptative adjustment, and ensure that
The definition of captions picture, improves user's viewing experience.
The above embodiments are merely illustrative of the technical solutions of the present invention, rather than is limited.Therefore, without departing substantially from this
In the case of the spiritual and its essence of invention, those skilled in the art can be variously modified, replace and modification.It will be apparent that but
These change, replacement and modification should be all covered by within the protection domain of the claims in the present invention.
Claims (10)
1. one kind renders synthetic method, it is characterised in that comprise the following steps：
Loading video and audio file；
When selection is loaded and opens subtitle file,
Call CPU carries out frame data decoding to the frame picture of video and audio file, obtains video and audio picture data；
Meanwhile, call GPU rendering engines to render the information that subtitle file is included；
Then, by the GPU rendering engines are to the video and audio picture data and render the caption data for obtaining and synthesize
Superposition is rendered, by subtitle superposition to video and audio picture.
2. synthetic method is rendered as claimed in claim 1, it is characterised in that the video and audio file is the video with audio
File, or without the video file of audio.
3. synthetic method is rendered as claimed in claim 1 or 2, it is characterised in that the information that the subtitle file is included includes
The corresponding caption character of frame video and audio picture, the font of captions, color, size, position, transparency and time-code.
4. synthetic method is rendered as claimed in claim 1 or 2, it is characterised in that frame pictures of the CPU to video and audio file
After carrying out frame data decoding, time-code information is got in real time；
Whether rendering engine searches corresponding time-code information in subtitle file, be contained within the time-code according to time-code position enquiring
Captions, such as contain captions, carry out GPU caption renderings.
5. synthetic method is rendered as claimed in claim 1 or 2, it is characterised in that methods described also includes：
When selection is not loaded with subtitle file, then directly invokes the video and audio picture after CPU is decoded it and carry out CPU and render, from
And complete the treatment of video and audio picture.
6. one kind renders synthesis system, it is characterised in that including CPU video-audio decoders and GPU rendering engines, wherein
CPU video-audio decoders are used to carry out frame data decoding to the frame picture of video and audio file；And
GPU rendering engines are used to render the information that subtitle file is included, and to decoding the video and audio picture data for obtaining
And render the caption data for obtaining carry out synthesis superposition render.
7. synthesis system is rendered as claimed in claim 6, it is characterised in that the video and audio file is the video with audio
File, or without the video file of audio.
8. as claimed in claims 6 or 7 render synthesis system, it is characterised in that the information that the subtitle file is included includes
The corresponding caption character of frame video and audio picture, the font of captions, color, size, position, transparency and time-code.
9. as claimed in claims 6 or 7 render synthesis system, it is characterised in that the CPU video-audio decoders are to video and audio
After the frame picture of file carries out frame data decoding, time-code information is got in real time；
Whether GPU rendering engines search corresponding time-code information in subtitle file, according to time-code position enquiring in the time-code
Containing captions, such as contain captions, carry out GPU caption renderings.
10. as claimed in claims 6 or 7 render synthesis system, it is characterised in that the CPU video-audio decoders are additionally operable to,
When subtitle file is not loaded with, the video and audio picture for decoding it carries out CPU and renders, so as to complete the treatment of video and audio picture.
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| CN201410145373.8A CN103905744B (en) | 2014-04-10 | 2014-04-10 | Rendering synthesis method and system |
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| CN105828156A (en) * | 2016-03-22 | 2016-08-03 | 乐视网信息技术（北京）股份有限公司 | Method and device of generating title background in video picture |
| CN106210838B (en) * | 2016-07-14 | 2019-05-24 | 腾讯科技（深圳）有限公司 | Caption presentation method and device |
| CN106303659A (en) * | 2016-08-22 | 2017-01-04 | 暴风集团股份有限公司 | The method and system of picture and text captions are loaded in player |
| CN106303579A (en) * | 2016-09-20 | 2017-01-04 | 上海斐讯数据通信技术有限公司 | Video play device and method |
| CN106600527A (en) * | 2016-12-19 | 2017-04-26 | 广东威创视讯科技股份有限公司 | Method and device for embedding adaptive-color text into image |
| CN106899875A (en) * | 2017-02-06 | 2017-06-27 | 合网络技术（北京）有限公司 | The display control method and device of plug-in captions |
| US10848737B2 (en) * | 2017-09-26 | 2020-11-24 | Lg Electronics Inc. | Overlay processing method in 360 video system, and device thereof |
| CN107995440B (en) * | 2017-12-13 | 2021-03-09 | 北京奇虎科技有限公司 | Video subtitle map generating method and device, computer readable storage medium and terminal equipment |
| CN110460889A (en) * | 2019-09-16 | 2019-11-15 | 深圳市迅雷网络技术有限公司 | A kind of video throws screen method, apparatus, system and storage medium |
| CN112312196A (en) * | 2020-11-13 | 2021-02-02 | 深圳市前海手绘科技文化有限公司 | Video subtitle making method |
| CN115334348A (en) * | 2021-05-10 | 2022-11-11 | 腾讯科技（北京）有限公司 | Video subtitle adjusting method and device, electronic equipment and storage medium |
| CN116916094B (en) * | 2023-09-12 | 2024-01-19 | 联通在线信息科技有限公司 | Dual-video mixed-stream playing method, player and storage medium |
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