CN102769715B - A kind of method and system of code stream editing - Google Patents
A kind of method and system of code stream editing Download PDFInfo
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- CN102769715B CN102769715B CN201210093688.3A CN201210093688A CN102769715B CN 102769715 B CN102769715 B CN 102769715B CN 201210093688 A CN201210093688 A CN 201210093688A CN 102769715 B CN102769715 B CN 102769715B
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Abstract
The invention discloses a kind of method and system of code stream editing, by reading video/audio, judge whether frame of video and audio unit need to reconstruct simultaneously, if desired for, then reconstructed accordingly respectively, after reconstruct, structure corresponding to voice data is attached in video data structure, realize the synchronization of video and audio, the data after synchronization are converted into object format again, realize only to shearing place video pictures group GOP and audio unit carry out the encoding and decoding that may need and audio reconstruction, and other most of video pictures group GOP and audio unit only need to replicate, substantially increase the efficiency of synthesis, reduce the loss of video and audio quality, maintain the quality of former video and audio.
Description
Technical field
The present invention relates to video and audio editing field, more particularly to a kind of method and system of code stream editing.
Background technology
With the enhancing of computer process ability, video and audio treatment technology there has also been significant progress.Video and audio processing
During, video and audio editing is most commonly used technology.
The video and audio editing of prior art is generally based on frame of video and audio frame, is first decoded, after carrying out editing,
Coding is being re-started, is being exported again afterwards.The process of encoding and decoding is a very complicated process, thus the efficiency of editing is very low.
The minimum unit of video is frame, and the minimum unit of audio is sampled point Sample, in the demand to higher efficiency,
With regard to needing a kind of code stream editing system.
The content of the invention
To solve the above problems, the invention provides a kind of method and system of code stream editing, only to shearing place
The encoding and decoding and audio reconstruction that video pictures group GOP and audio unit progress may need, and other most of video pictures
Group GOP and audio unit only need to replicate, and substantially increase the efficiency of synthesis, reduce the loss of video and audio quality, maintain original
The quality of video and audio.
One aspect of the present invention provides a kind of method of code stream editing, comprises the following steps：
Step 101, video/audio is read, while enters step 102 and step 105；
Step 102, judge whether the video pictures group GOP in the video/audio where n frame data needs code stream
Reconstruct, if so, into step 103, if not into step 104；
Step 103, code stream reconstruct is carried out to the video pictures group GOP, afterwards into step 109；
Step 104, judge n frame data whether the last frame for being video pictures group GOP, if into step 109, if
It is no to enter step 101；
Step 105, judge whether the audio of n frame data in the video/audio module needs to abandon, if so, into
Step 106, if it is not, into step 107；
Step 106, the audio for abandoning the n frame data forms sky data, into step 109；
Step 107, judge whether the audio of the n frame data needs to reconstruct, if into step 108, if it is not, into
Step 109；
Step 108, the audio of the n frame data is reconstructed；
Step 109, video and audio synchrodata is obtained；
Step 110, the video and audio synchrodata is converted into object format.
Another aspect of the present invention provides a kind of system of code stream editing, including with lower module：
Video/audio read module 201, for reading video/audio, it is connected with module 202 and module 205；
Video data reconstructs judge module 202, for judging the picture group in the video/audio where n frame data
Whether GOP needs code stream to reconstruct；
Video data reconstructed module 203, code stream reconstruct is carried out to the picture group GOP；
Last frame determination module 204, judge n frame data whether the last frame for being picture group GOP；
Voice data abandons determination module 205, and whether judge the audio of n frame data in the video/audio module needs
Abandon；
Empty audio generation module 206, the audio for abandoning the n frame data form sky data；
Voice data reconstructs judge module 207, and whether the audio for judging the n frame data needs to reconstruct；
Voice data reconstructed module 208, for the audio of the n frame data to be reconstructed；
Video/audio synchronization module 209, for video data and voice data is synchronous, obtain the same step number of video and audio
According to；
Format converting module 210, for the video and audio synchrodata to be converted into object format.
What the technical scheme of the embodiment of the present invention was brought has the beneficial effect that：By reading video/audio, judge simultaneously
Whether frame of video and audio frame need to reconstruct, if desired, then being reconstructed accordingly respectively, after reconstruct, by voice data pair
The structure answered is attached in video data structure, realizes the synchronization of video and audio, then the data after synchronization are converted into object format, real
Showed only to shearing place video pictures group GOP and audio unit carry out the encoding and decoding that may need and audio reconstruction, and
Other most of video pictures group GOP and audio unit only need to replicate, and substantially increase the efficiency of synthesis, reduce video and audio
The loss of quality, maintain the quality of former video and audio.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, without having to pay creative labor, may be used also
To obtain other accompanying drawings according to these accompanying drawings.
Fig. 1 is the embodiment of the present invention one, a kind of flow chart of the method for code stream editing；
Fig. 2 is the embodiment of the present invention two, a kind of structure chart of the system of code stream editing.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is part of the embodiment of the present invention, rather than whole embodiments.Based on this hair
Embodiment in bright, the every other implementation that those of ordinary skill in the art are obtained under the premise of creative work is not made
Example, belongs to the scope of protection of the invention.
Embodiment one
The embodiments of the invention provide a kind of method of code stream editing, such as Fig. 1, comprise the following steps：
Step 101, video/audio is read, while enters step 102 and step 105；
Wherein, video/audio is read sequentially to read the video/audio from files in stream media, and can not be repeated
Read video/audio.
Step 102, judge whether the video pictures group GOP in the video/audio where n frame data needs code stream
Reconstruct, if so, into step 103, if not into step 104；
Step 103, code stream reconstruct is carried out to the picture group GOP, into step 109；
Step 104, judge n frame data whether the last frame for being picture group GOP, if into step 109, enter if not
Enter step 101；
Step 105, judge whether the audio of n frame data in the video/audio module needs to abandon, if so, into
Step 106, if it is not, into step 107；
Step 106, the audio for abandoning the n frame data forms sky data, into step 109；
Step 107, judge whether the audio of the n frame data needs to reconstruct, if into step 108, if it is not, into
Step 109；
Step 108, the audio of the n frame data is reconstructed, into step 109；
Step 109, it is video data and voice data is synchronous；
It is specially synchronously by video data and voice data：
The data structure for the picture group GOP structure of the audio of the n frame data being attached to where the n frame data
In.
Step 110, the video and audio synchrodata is converted into object format.
Wherein, object format includes：TS forms, MP4 forms and FLV forms.
What the technical scheme of the embodiment of the present invention was brought has the beneficial effect that：By reading video/audio, judge simultaneously
Whether frame of video and audio frame need to reconstruct, if desired, then being reconstructed accordingly respectively, after reconstruct, by voice data pair
The structure answered is attached in video data structure, realizes the synchronization of video and audio, then the data after synchronization are converted into object format, real
Showed only to shearing place video pictures group GOP and audio unit carry out the encoding and decoding that may need and audio reconstruction, and
Other most of video pictures group GOP and audio unit only need to replicate, and substantially increase the efficiency of synthesis, reduce video and audio
The loss of quality, maintain the quality of former video and audio.
Embodiment two：
A kind of system of code stream editing of offer of the embodiment of the present invention, such as Fig. 2, including with lower module：
Video/audio read module 201, for reading video/audio, it is connected with module 202 and module 205；
Wherein, video/audio is read sequentially to read the video/audio from files in stream media, and can not be repeated
Read video/audio.
Video data reconstructs judge module 202, for judging the picture group in the video/audio where n frame data
Whether GOP needs code stream to reconstruct；
Video data reconstructed module 203, code stream reconstruct is carried out to the picture group GOP；
Last frame determination module 204, judge n frame data whether the last frame for being picture group GOP；
Voice data abandons determination module 205, and whether judge the audio of n frame data in the video/audio module needs
Abandon；
Empty audio generation module 206, the audio for abandoning the n frame data form sky data；
Voice data reconstructs judge module 207, and whether the audio for judging the n frame data needs to reconstruct；
Voice data reconstructed module 208, for the audio of the n frame data to be reconstructed；
Video/audio synchronization module 209, for video data and voice data is synchronous, obtain the same step number of video and audio
According to；
It is specially synchronously by video data and voice data：
The data structure for the picture group GOP structure of the audio of the n frame data being attached to where the n frame data
In.
Format converting module 210, for the video and audio synchrodata to be converted into object format.
Including：
TS video and audios are multiplexed submodule；
MP4 video and audios synthesize submodule；
FLV video and audios synthesize submodule.
What the technical scheme of the embodiment of the present invention was brought has the beneficial effect that：By reading video/audio, judge simultaneously
Whether frame of video and audio frame need to reconstruct, if desired, then being reconstructed accordingly respectively, after reconstruct, by voice data pair
The structure answered is attached in video data structure, realizes the synchronization of video and audio, then the data after synchronization are converted into object format, real
Showed only to shearing place video pictures group GOP and audio unit carry out the encoding and decoding that may need and audio reconstruction, and
Other most of video pictures group GOP and audio unit only need to replicate, and substantially increase the efficiency of synthesis, reduce video and audio
The loss of quality, maintain the quality of former video and audio.
Through the above description of the embodiments, those skilled in the art can be understood that the present invention can lead to
Hardware realization is crossed, the mode of necessary general hardware platform can also can be added by software to realize, based on such understanding, this
The technical scheme of invention can be embodied in the form of software product, and the software product can be stored in one and non-volatile deposit
In storage media (can be CD-ROM, USB flash disk, mobile hard disk etc.), including some instructions are causing a computer equipment (can be with
It is personal computer, server, or network equipment etc.) perform method described in each embodiment of the present invention.
In a word, the foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the scope of the present invention.
Within the spirit and principles of the invention, any modification, equivalent substitution and improvements made etc., it should be included in the present invention's
Within protection domain.
Claims (10)
- A kind of 1. method of code stream editing, it is characterised in that comprise the following steps：Step 101, video/audio is read, while enters step 102 and step 105；Step 102, judge whether the video pictures group GOP in the video/audio where n frame data needs code stream to reconstruct, If so, into step 103, if not into step 104；Step 103, code stream reconstruct is carried out to the video pictures group GOP, afterwards into step 109；Step 104, judge the n frame data whether the last frame for being the video pictures group GOP, if into step 109, if not into step 101；Step 105, judge whether the audio of n frame data in the video/audio module needs to abandon, if so, into step 106, if it is not, into step 107；Step 106, the audio for abandoning the n frame data forms sky data, into step 109；Step 107, judge whether the audio of the n frame data needs to reconstruct, if into step 108, if it is not, into step 109；Step 108, the audio of the n frame data is reconstructed；Step 109, video and audio synchrodata is obtained；Step 110, the video and audio synchrodata is converted into object format.
- 2. method as claimed in claim 1, it is characterised in that video/audio is read described in step 101 is specially：From Streaming Media The video/audio is sequentially read in file.
- 3. method as claimed in claim 2, it is characterised in that described that the video and audio number is sequentially read from files in stream media According to, it is impossible to repeat to read video/audio.
- 4. method as claimed in claim 1, it is characterised in that video and audio synchrodata is obtained described in step 109 is specially：The data structure for the video pictures group GOP structure of the audio of the n frame data being attached to where the n frame data In.
- 5. method as claimed in claim 1, it is characterised in that object format includes described in step 110：TS forms, MP4 forms with And FLV forms.
- 6. a kind of system of code stream editing, it is characterised in that including with lower module：Video/audio read module 201, for reading video/audio, it is connected with module 202 and module 205；Video data reconstructs judge module 202, for judging the picture group GOP in the video/audio where n frame data Whether code stream is needed to reconstruct；Video data reconstructed module 203, code stream reconstruct is carried out to the picture group GOP；Last frame determination module 204, judge the n frame data whether the last frame for being the video pictures group GOP；Voice data abandons determination module 205, judges whether the audio of n frame data in the video/audio module needs to lose Abandon；Empty audio generation module 206, the audio for abandoning the n frame data form sky data；Voice data reconstructs judge module 207, and whether the audio for judging the n frame data needs to reconstruct；Voice data reconstructed module 208, for the audio of the n frame data to be reconstructed；Video/audio synchronization module 209, for video data and voice data is synchronous, obtain video and audio synchrodata；Format converting module 210, for the video and audio synchrodata to be converted into object format.
- 7. system as claimed in claim 6, it is characterised in that video/audio is read described in module 201 is specially：From Streaming Media The video/audio is sequentially read in file.
- 8. system as claimed in claim 7, it is characterised in that described that the video and audio number is sequentially read from files in stream media According to, it is impossible to repeat to read video/audio.
- 9. system as claimed in claim 6, it is characterised in that described in module 209 that video data and voice data is synchronously specific For：In the data structure for the picture group GOP structure of the audio of the n frame data being attached to where the n frame data.
- 10. system as claimed in claim 6, it is characterised in that the format converting module 210 includes：TS video and audios are multiplexed submodule；MP4 video and audios synthesize submodule；FLV video and audios synthesize submodule.
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| CN201210093688.3A CN102769715B (en) | 2012-03-31 | 2012-03-31 | A kind of method and system of code stream editing |
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| CN102769715B true CN102769715B (en) | 2017-12-29 |
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| CN104768025B (en) * | 2015-04-02 | 2018-05-08 | 无锡天脉聚源传媒科技有限公司 | A kind of video bad frame restorative procedure and device |
| CN114143601A (en) * | 2021-12-06 | 2022-03-04 | 北京达佳互联信息技术有限公司 | Method, device, electronic equipment, storage medium and program product for cutting video |
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| CN101287122A (en) * | 2008-05-23 | 2008-10-15 | 清华大学 | Video decoding method with active buffer management and complexity control function |
| CN101345790A (en) * | 2007-07-09 | 2009-01-14 | 上海基信通讯技术有限公司 | Method for editing audio files in mobile phone |
| CN101867692A (en) * | 2009-02-03 | 2010-10-20 | 美国博通公司 | A kind of communication means and communication system |
| CN101873498A (en) * | 2010-06-22 | 2010-10-27 | 深圳市融创天下科技发展有限公司 | Video decoding method, video decoding device and video/audio play system |
| CN102075528A (en) * | 2010-12-27 | 2011-05-25 | 上海聚欣网络科技有限公司 | Method and equipment for playing network multimedia files of multiple encapsulation formats |
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| US8606848B2 (en) * | 2009-09-10 | 2013-12-10 | Opentv, Inc. | Method and system for sharing digital media content |
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Patent Citations (5)
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|---|---|---|---|---|
| CN101345790A (en) * | 2007-07-09 | 2009-01-14 | 上海基信通讯技术有限公司 | Method for editing audio files in mobile phone |
| CN101287122A (en) * | 2008-05-23 | 2008-10-15 | 清华大学 | Video decoding method with active buffer management and complexity control function |
| CN101867692A (en) * | 2009-02-03 | 2010-10-20 | 美国博通公司 | A kind of communication means and communication system |
| CN101873498A (en) * | 2010-06-22 | 2010-10-27 | 深圳市融创天下科技发展有限公司 | Video decoding method, video decoding device and video/audio play system |
| CN102075528A (en) * | 2010-12-27 | 2011-05-25 | 上海聚欣网络科技有限公司 | Method and equipment for playing network multimedia files of multiple encapsulation formats |
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