CN115086717A - Method and system for real-time editing, rendering and synthesizing of audio and video works - Google Patents
Method and system for real-time editing, rendering and synthesizing of audio and video works Download PDFInfo
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- CN115086717A CN115086717A CN202210615693.XA CN202210615693A CN115086717A CN 115086717 A CN115086717 A CN 115086717A CN 202210615693 A CN202210615693 A CN 202210615693A CN 115086717 A CN115086717 A CN 115086717A
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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, manipulating MPEG-4 scene graphs
- H04N21/2343—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements
- H04N21/234309—Processing of video elementary streams, e.g. splicing of video streams, manipulating MPEG-4 scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements by transcoding between formats or standards, e.g. from MPEG-2 to MPEG-4 or from Quicktime to Realvideo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/02—Protocols based on web technology, e.g. hypertext transfer protocol [HTTP]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/40—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using video transcoding, i.e. partial or full decoding of a coded input stream followed by re-encoding of the decoded output stream
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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
- H04N21/233—Processing of audio elementary streams
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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, manipulating MPEG-4 scene graphs
-
- 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
- H04N21/235—Processing of additional data, e.g. scrambling of additional data or processing content descriptors
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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
- H04N21/27—Server based end-user applications
- H04N21/274—Storing end-user multimedia data in response to end-user request, e.g. network recorder
- H04N21/2743—Video hosting of uploaded data from client
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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
- H04N21/81—Monomedia components thereof
- H04N21/8166—Monomedia components thereof involving executable data, e.g. software
- H04N21/8173—End-user applications, e.g. Web browser, game
Abstract
The invention discloses a method and a system for editing, rendering and synthesizing audio and video works in real time, wherein the method comprises the steps of uploading audio and video files corresponding to the audio and video works to be processed to a browser, and transcoding the audio and video files by a transcoding unit in the browser; an editing unit in the browser renders the transcoded audio/video file to generate real-time video and audio; a synthesizing unit in the browser respectively processes the video and the audio, re-renders and records the video in the editing unit for the video, and re-samples, mixes and encodes the audio in the editing unit for the audio; and merging the processed video and audio, packaging into a new audio and video file, and storing the new audio and video file in the browser. By adopting the technical scheme of the invention, the operation is very convenient, the cost can be reduced, and the dependence on network service is greatly reduced.
Description
Technical Field
The invention relates to the technical field of audio and video, in particular to a method and a system for real-time editing, rendering and synthesizing audio and video works.
Background
In the traditional web non-linear editing software, audio and video files in various formats uploaded by a user are transcoded by a server and then returned to a front end, and the user previews and clips the transcoded audio and video files at the front end; the front end sends the clipping data to the server after finishing the clipping operation, and the server synthesizes the clipping data, so that the transcoding and synthesis of the core function can only depend on the processing of the server in the process, and the dependence on network services is too high.
Disclosure of Invention
In order to solve the problems in the prior art, embodiments of the present invention provide a method and a system for real-time editing, rendering and synthesizing of audio and video works, which are very convenient and fast to operate, and can reduce cost and greatly reduce the dependence on network services.
One aspect of the embodiments of the present invention provides a method for real-time editing, rendering and synthesizing an audio and video work, including the following steps:
uploading an audio and video file corresponding to an audio and video work to be processed to a browser, and transcoding the audio and video file by a transcoding unit in the browser;
an editing unit in the browser renders the transcoded audio/video file to generate real-time video and audio;
a synthesizing unit in the browser respectively processes the video and the audio, re-renders and records the video in the editing unit for the video, and re-samples, mixes and encodes the audio in the editing unit for the audio;
and merging the processed video and audio, packaging into a new audio and video file, and storing the new audio and video file in the browser.
Further, the transcoding unit transcodes the audio file into an aac encoded mp3 file and the video file into an h264 video encoded and aac audio encoded mp4 file by using ffmpeg.
Further, an editing unit in the browser renders the transcoded audio/video file, and the method further comprises the following steps:
the audio part employs web audio api technology and the video part employs webgl technology.
Further, the rendering material includes audio files, video files, stickers, text, subtitles, filters, and/or transition effects.
For the video, re-rendering the video in the editing unit and recording, further comprising the following steps:
video rendering content is recorded as an h264 encoded mp4 file by 25 frames per second using mediadecoder technology.
Further, for the audio, the audio in the editing unit is resampled, mixed and encoded into an aac audio-encoded mp3 file.
Further, the processed video and audio are merged by using ffmpeg, and packaged into a new audio-video file in an mp4 format.
On the other hand, the embodiment of the invention provides a system for real-time editing, rendering and synthesizing of audio and video works, which is positioned in a browser and comprises a transcoding unit, an editing unit, a synthesizing unit and a storage unit, wherein,
the transcoding unit is used for transcoding the audio/video file corresponding to the audio/video work to be processed;
the editing unit is used for rendering the transcoded audio/video file to generate real-time video and audio;
the synthesis unit is used for re-rendering and recording the video in the editing unit for the video, re-sampling, mixing and encoding the audio in the editing unit for the audio, merging the processed video and audio, and packaging into a new audio and video file;
the storage unit is used for storing the new audio and video file.
Further, the synthesizing unit further comprises a recording module and a sampling and encoding module, wherein the recording module is used for recording video rendering content, and the sampling and encoding module is used for resampling, mixing and encoding audio.
By adopting the technical scheme of the invention, because the browser supports, the client does not need to be downloaded, the operation is very convenient, the transcoding and synthesis service cost is avoided, the storage is only needed, the cost can be reduced, the transcoding and synthesis functions are completely handed to the front end by using the webassempty technology, and the dependence on network service is greatly reduced by using a cache mechanism.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is a flowchart of real-time editing, rendering and synthesizing of an audio-video work in an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a real-time editing, rendering and synthesizing system for an audio-video work in an embodiment of the present invention.
It is understood that the drawings only show some embodiments of the invention and are therefore not to be considered limiting of its scope, for a person skilled in the art to which it pertains, from which other related drawings can be derived without inventive effort.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The components of embodiments of the present invention generally described and illustrated in the figures can be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
Fig. 1 is a flowchart of real-time editing, rendering and synthesizing an audiovisual work in an embodiment of the present invention. As shown in fig. 1, the process of real-time editing, rendering and synthesizing the audio-video work includes the following steps:
And 102, transcoding the audio and video file by a transcoding unit in the browser. Because the coding and the format of the audio/video file uploaded by the user are different, the audio/video file needs to be transcoded uniformly. The transcoding unit transcodes the audio file into an aac encoded mp3 file and the video file into an h264 video encoded and aac audio encoded mp4 file by using ffmpeg.
And 103, rendering the transcoded audio and video file by an editing unit in the browser to generate real-time video and audio.
And inputting the transcoded audio/video file into an editing unit, and rendering the material to include a sticker, characters, a subtitle, a filter and/or a transition special effect besides the audio file and the video file. Wherein the audio part adopts web audio api technology provided by w3c, the video part adopts webgl technology, and implemented video pictures and audio output are output.
And step 104, the synthesis unit in the browser processes the video and the audio independently.
For the video, the video in the editing unit is re-rendered and recorded, and the mediadecoder technology can be adopted to record the video rendering content in a mode of 25 frames per second, so as to become an h264 encoded mp4 file.
For audio, the audio in the editing unit is resampled, mixed and encoded into an aac audio encoded mp3 file.
And 105, merging the processed video and audio by using ffmpeg, and packaging into a new audio and video file, wherein the new audio and video file is in an mp4 format and is stored in a browser.
In order to implement the above process, the embodiment of the present invention further provides a system for real-time editing, rendering and synthesizing an audio/video work.
Fig. 2 is a schematic structural diagram of a real-time editing, rendering and synthesizing system for an audio-video work in an embodiment of the present invention. As shown in fig. 2, the system for real-time editing, rendering and synthesizing audio and video works is located in a browser 20, and includes a transcoding unit 201, an editing unit 202, a synthesizing unit 203 and a storage unit 204.
The transcoding unit transcodes the audio and video file corresponding to the audio and video work to be processed.
And the editing unit renders the transcoded audio/video file to generate real-time video and audio.
The synthesizing unit comprises a recording module 301 and a sampling and encoding module 302, wherein the recording module is used for recording video rendering content, and the sampling and encoding module is used for resampling, mixing and encoding audio.
And the synthesizing unit re-renders the video in the editing unit for the video and records the video, re-samples, mixes and encodes the audio in the editing unit for the audio, and merges the processed video and the processed audio to package the video and the audio into a new audio and video file.
The storage unit stores a new audio and video file.
By adopting the embodiment of the invention, because the browser supports, the client does not need to be downloaded, the operation is very convenient, the transcoding and synthesis service cost is avoided, the storage is only needed, the cost can be reduced, the transcoding and synthesis functions are completely handed to the front end by using the webelementary technology, and the dependence on network service is greatly reduced by using a cache mechanism.
In the several embodiments of the invention provided, it should be understood that the described systems and methods may be implemented in other ways. The above-described system embodiments are merely illustrative, and for example, the division of the units is only one logical division, and there may be other divisions in actual implementation, and for example, a plurality of units may be combined or may be integrated into another unit, and the coupling or communication connection between the units may be in an electrical, mechanical or other form.
Units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units.
In addition, functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a non-volatile computer-readable storage medium executable by a processor. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a usb disk, a removable hard disk, a Read-only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, and are used to illustrate the technical solutions of the present invention, but not to limit the technical solutions, and the scope of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: those skilled in the art can still make modifications or easily conceive of changes to the technical solutions described in the foregoing embodiments or equivalent substitutions of some technical features within the technical scope disclosed in the present application, and such modifications, changes or substitutions do not make the essence of the corresponding technical solutions depart from the spirit and scope of the technical solutions of the embodiments of the present invention, and are intended to be covered by the protection scope of the present application. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (9)
1. A method for real-time editing, rendering and synthesizing of audio and video works is characterized by comprising the following steps:
uploading an audio and video file corresponding to an audio and video work to be processed to a browser, and transcoding the audio and video file by a transcoding unit in the browser;
an editing unit in the browser renders the transcoded audio/video file to generate real-time video and audio;
a synthesizing unit in the browser respectively processes the video and the audio, re-renders and records the video in the editing unit for the video, and re-samples, mixes and encodes the audio in the editing unit for the audio;
and merging the processed video and audio, packaging into a new audio and video file, and storing in the browser.
2. The method for real-time editing, rendering and synthesizing of audio-visual works according to claim 1, wherein the transcoding unit transcodes the audio file into an aac encoded mp3 file through ffmpeg and the video file into an h264 video encoded and aac audio encoded mp4 file by using ffmpeg.
3. The method for real-time editing, rendering and synthesizing of an audio-visual work according to claim 1, wherein an editing unit in the browser renders the transcoded audio-visual file, further comprising the steps of:
the audio part employs web audio api technology and the video part employs webgl technology.
4. The method of claim 3 in which the rendering material comprises audio files, video files, stickers, text, subtitles, filters and/or transition effects.
5. The method of real-time editing, rendering and composing an audiovisual work according to claim 2, wherein for the video, the video in the editing unit is re-rendered and recorded, further comprising the steps of:
video rendering content is recorded as an h264 encoded mp4 file by 25 frames per second using mediadecoder technology.
6. The method of real-time editing, rendering and synthesizing of an audiovisual work according to claim 5, wherein for the audio, the audio in the editing unit is resampled, mixed and encoded to make aac audio encoded mp3 file.
7. The method for real-time editing, rendering and synthesizing of audio-visual works as claimed in claim 5, wherein ffmpeg is used to merge the processed video and audio and the packaging into a new audio-visual file is in mp4 format.
8. A system for real-time editing, rendering and synthesizing audio and video works is characterized in that the system for real-time editing, rendering and synthesizing audio and video works is positioned in a browser and comprises a transcoding unit, an editing unit, a synthesizing unit and a storage unit, wherein,
the transcoding unit is used for transcoding the audio/video file corresponding to the audio/video work to be processed;
the editing unit is used for rendering the transcoded audio/video file to generate real-time video and audio;
the synthesis unit is used for re-rendering and recording the video in the editing unit for the video, re-sampling, mixing and encoding the audio in the editing unit for the audio, merging the processed video and audio, and packaging into a new audio and video file;
the storage unit is used for storing the new audio and video file.
9. The system for real-time editing, rendering and synthesizing of audio-visual works according to claim 8, wherein the synthesizing unit further comprises a recording module for recording video rendering content and a sampling and encoding module for resampling, mixing and encoding audio.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210615693.XA CN115086717A (en) | 2022-06-01 | 2022-06-01 | Method and system for real-time editing, rendering and synthesizing of audio and video works |
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| CN202210615693.XA CN115086717A (en) | 2022-06-01 | 2022-06-01 | Method and system for real-time editing, rendering and synthesizing of audio and video works |
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