CN103702172A - Method and system for carrying out dolby transcoding on AV (Audio/Video) - Google Patents
Method and system for carrying out dolby transcoding on AV (Audio/Video) Download PDFInfo
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Abstract
The invention discloses a method and a system for carrying out dolby transcoding on AV (Audio/Video). The method comprises the steps of obtaining the AV needing to be subjected to the dolby transcoding by a control center, splitting the AV by the control center, and obtaining an audio and a video; indicating and monitoring an operation for carrying out video transcoding on the video in a corresponding format and an operation for carrying out the dolby transcoding on the audio in a corresponding format by the control center, saving a generated audio file and a generated video file after the situation that the transcoding is completed is monitored, simultaneously executing dolby compositing on the audio file and the video file which are generated after the transcoding is completed, and outputting a dolby AV file. According to the method and the system, disclosed by the invention, the problems in the prior art that the dolby transcoding can be carried out by enabling the audio in the AV file to be independent from the AV file, the independent transcoding efficiency is low, and the requirement on transcoding processing of a large number of AV files cannot be met can be solved.
Description
Technical Field
The present application relates to the field of video transcoding, and more particularly, to a method and system for dolby transcoding of audio and video.
Background
With the rapid development of information technology, the presentation form and transmission mode of information have changed: from the traditional text (such as books and newspapers) and audio (such as broadcasting), the method is changed into a video method with vivid expression and more information. The television and the internet display and share rich comprehensive resources of various film and television programs, news, advertisements, chatting, education, games and the like in a video form, so that the video becomes an important way for people to learn, socialize and entertain instead of replacing the video.
At present, many dolby channels are on line, and the adopted transcoding is cloud transcoding, and the cloud transcoding also needs to transcode audio and synthesize the transcoded audio and video. As shown in fig. 1, dolby transcoding in the prior art only transcodes an audio file, and if the video file contains an audio part, the audio part needs to be extracted and dolby transcoding is performed separately, but the processes of distribution, checking a file, notifying media resources and the like after transcoding is completed are the same. However, this adds significant duplication of effort, increasing development, maintenance costs, and resource footprint. The process also reduces the transcoding capacity of cloud transcoding, is not beneficial to the unified management of transcoding tasks, also increases the development cost, reduces the reusability of functions and the maintainability of a system, and is not flexible enough, so that the performance is difficult to meet the transcoding requirements of a large number of videos. Therefore, for dolby transcoding, it is necessary to perform dolby transcoding independently.
Disclosure of Invention
In view of this, the technical problem to be solved by the present application is to provide a method and a system for dolby transcoding of audio and video, so as to solve the problem that dolby transcoding requires independent transcoding of audio portions in an audio and video file, which is inefficient, and cannot meet the transcoding processing requirements of a large number of audio and video files in the prior art.
In order to solve the technical problem, the application discloses a method for dolby transcoding audio/video, which is characterized by comprising the following steps:
acquiring the audio and video needing transcoding by a control center, and splitting the audio and video by the control center to obtain audio and video;
the control center indicates and monitors video transcoding operation of the video in the corresponding format and dolby transcoding operation of the audio in the corresponding format, stores the generated audio file and video file after monitoring that transcoding is completed, executes dolby synthesis on the audio file and video file generated after transcoding is completed, and outputs a dolby audio and video file.
Preferably, the dolby transcoding operation of the audio in the corresponding format is further performed as follows:
and completing the dolby transcoding operation of the corresponding format on the audio through the cooperation of the audio transcoding machine and the DP600 transcoding machine.
Preferably, the video transcoding operation of the corresponding format is performed on the video, and further:
carrying out video transcoding operation of a corresponding format on the video according to the video code rate corresponding to the dolby code rate; wherein,
and the video code rate corresponding to the dolby code rate is automatically detected by the control center according to the dolby code rate to obtain the video code rate corresponding to the video.
Preferably, the DP600 transcoder is further a chip for encoding, decoding, converting and transcoding the audio.
In order to solve the above technical problem, the present application further discloses a system for dolby transcoding of audio/video, which is characterized in that the system includes: a splitting unit and a dolby transcoding synthesis unit are obtained, wherein,
the acquisition and splitting unit is used for indicating a control center to acquire the audio and video needing transcoding, and splitting the audio and video through the control center to obtain audio and video;
the dolby transcoding synthesis unit is used for indicating and monitoring video transcoding operation of corresponding formats performed on the videos obtained by the obtaining and splitting unit and dolby transcoding operation of corresponding formats performed on the audios obtained by the obtaining and splitting unit through the control center, storing the generated audio files and video files after monitoring that transcoding is completed, executing dolby synthesis on the audio files and video files generated after transcoding is completed, and outputting dolby audio and video files.
Preferably, the dolby transcoding synthesizing unit is further configured to instruct and monitor, by the control center, a video transcoding operation in a corresponding format performed on the video obtained by the obtaining and splitting unit according to a video bitrate corresponding to the dolby bitrate, complete a dolby transcoding operation in a corresponding format performed on the audio obtained by the obtaining and splitting unit through cooperation of an audio transcoding machine and a DP600 transcoding machine, store the generated audio file and video file after monitoring that transcoding is completed, perform dolby synthesis on the audio file and video file generated after transcoding is completed, and output a dolby audio and video file;
and the video code rate corresponding to the dolby code rate is automatically detected by the control center according to the dolby code rate to obtain the video code rate corresponding to the video.
Preferably, the DP600 transcoder is further a chip for encoding, decoding, converting and transcoding the audio.
Compared with the prior art, the method and the system for carrying out dolby transcoding on the audio and video achieve the following effects:
1) the Dolby transcoding is integrated into cloud transcoding (namely a control center), so that transcoding resources and the specification and unification of scheduling processes are utilized more efficiently, and the transcoding capacity of cloud transcoding is enhanced, so that a high-quality audio effect or an audio with a special effect is obtained; meanwhile, the workload and the resource occupation are reduced, the reusability of functions and the maintainability of a system are improved, the unified management of transcoding tasks is facilitated, and the transcoding requirements of a large number of videos are met in performance.
2) The method and the device ensure the uniformity of the external interface, and can effectively track and monitor the audio transcoding and video transcoding tasks; the existing processes of distributing, checking, notifying and the like are adopted, so that the development cost is saved.
Of course, it is not necessary for any one product to achieve all of the above-described technical effects simultaneously.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
fig. 1 is a block flow diagram of a method for dolby transcoding audio as described in the prior art.
Fig. 2 is a block flow diagram of a method for dolby transcoding of audio and video according to a first embodiment of the present application.
Fig. 3 is a block flow diagram of a method for dolby transcoding of audio and video according to the second embodiment of the present application.
Fig. 4 is a block flow diagram of a method for dolby transcoding of audio and video according to a third embodiment of the present application.
Fig. 5 is a block diagram of a system for dolby transcoding audio and video according to the fourth embodiment of the present application.
Detailed Description
As used in the specification and in the claims, certain terms are used to refer to particular components. As one skilled in the art will appreciate, manufacturers may refer to a component by different names. This specification and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. "substantially" means within an acceptable error range, and a person skilled in the art can solve the technical problem within a certain error range to substantially achieve the technical effect. Furthermore, the term "coupled" is intended to encompass any direct or indirect electrical coupling. Thus, if a first device couples to a second device, that connection may be through a direct electrical coupling or through an indirect electrical coupling via other devices and couplings. The description which follows is a preferred embodiment of the present application, but is made for the purpose of illustrating the general principles of the application and not for the purpose of limiting the scope of the application. The protection scope of the present application shall be subject to the definitions of the appended claims.
Example one
As shown in fig. 2, a method for dolby transcoding an audio and video according to a first embodiment of the present application includes:
Specifically, when a video website performs a video transcoding task, transcoding processing is performed by calling a film source stored in a film source server, under a normal condition, the video website adopts a cloud transcoding system, users in various regions can upload video resources to corresponding film source servers, and after transcoding processing, users in other regions can access the video website to watch or download corresponding videos (the videos in the region refer to audio and video) through a computer terminal, a mobile terminal or a television terminal, and the video transcoding task further comprises the resolution, the code rate, the video format, the video duration and the like of the film source.
And step 102, the control center indicates and monitors video transcoding operation of the video in a corresponding format and dolby transcoding operation of the audio in a corresponding format, stores the generated audio file and video file after monitoring that transcoding is completed, executes dolby synthesis on the audio file and video file generated after transcoding is completed, and outputs a dolby audio and video file.
In step 102, a dolby transcoding operation of a corresponding format is performed on the audio, and further, the dolby transcoding operation of the corresponding format on the audio is completed through cooperation of an audio transcoder and a DP600 transcoder.
The DP600 transcoder is further a chip for encoding, decoding, converting and transcoding the audio.
Dolby DP600 provides a unique set of audio tools to support file-based broadcast environments and workflows. Dolby DP600 provides a file-based workflow solution that helps accomplish loudness correction, audio creation, conversion, and upmixing. Dolby DP600 is specifically designed for cable, satellite, IPTV, terrestrial television, broadcast and post-production facilities. The DP600 can encode, decode, convert and transcode Dolby digital, Dolby digital +, Dolby wave (Dolby Pulse) and Dolby E format code streams; it also supports PCM, MPEG-1LII, AAC, HE AAC, and HE AAC v.2. The dolby DP600 may upmix conventional two-channel audio to achieve 5.1 channel transmission. To assist users in easily migrating to file-based workflows, the DP600 also supports many of the most common broadcast media files and audio formats currently in use, as is well known to those skilled in the art.
In step 102, performing a video transcoding operation of a corresponding format on the video, and further performing a video transcoding operation of a corresponding format on the video according to a video bitrate corresponding to the dolby bitrate;
and the video code rate corresponding to the dolby code rate is automatically detected by the control center according to the dolby code rate to obtain the video code rate corresponding to the video.
For a film source which needs video transcoding and audio transcoding, audio and video are required to be split and transcoded respectively. And carrying out dolby transcoding on the audio part, carrying out video transcoding on the video part, merging transcoded finished products, and taking the obtained finished product as a dolby integrated final finished product. This process is called dolby integration.
Example two
As shown in fig. 3, a method for dolby transcoding an audio/video according to the second embodiment of the present application includes:
step 201, a control center acquires the audio and video to be transcoded, and the control center splits the audio and video to obtain audio and video.
Step 202, configured to instruct and monitor, by the control center, a video transcoding operation in a corresponding format performed on the video obtained by the obtaining and splitting unit according to a video bitrate corresponding to a dolby bitrate, complete, by cooperating an audio transcoding machine and a DP600 transcoding machine, a dolby transcoding operation in a corresponding format performed on the audio obtained by the obtaining and splitting unit, store the generated audio file and video file after monitoring that transcoding is completed, perform dolby synthesis on the audio file and video file generated after transcoding is completed, and output a dolby audio and video file;
and the video code rate corresponding to the dolby code rate is automatically detected by the control center according to the dolby code rate to obtain the video code rate corresponding to the video.
The DP600 transcoder is further a chip for encoding, decoding, converting and transcoding the audio.
EXAMPLE III
The following describes in detail specific applications of the method for dolby transcoding audio and video:
the background is as follows: existing 1 kinds of audio and video (taking a film source as an example) are subjected to transcoding processing, namely, the film source a, wherein:
the resolution of the film source A is 848 × 480, the code rate is 550kbps, and the format is MP 4;
the above-mentioned film source will be broadcast on the television terminal, mobile terminal and computer terminal, need transcoding to be processed into using dolby's transcoding after ". flv" form.
The method comprises the following specific steps:
firstly, the control center receives a film source A, and splits the film source A to obtain audio and video.
And then, the control center distributes the obtained video to a video transcoding machine for video transcoding, the video transcoding is carried out according to a transcoding script preset in the control center, and simultaneously, dolby transcoding operation (namely, converting an audio AC3 format file into an EAC3 format file of dolby) is completed on the obtained audio through the cooperation of the audio transcoding machine and the DP600 transcoding machine, the control center carries out real-time monitoring on the transcoding of the audio and the video, when the transcoding of the video and the audio is completed, a synthesis task of the video and the audio is triggered, an audio and video with high tone quality is generated, and distribution and verification processing are carried out.
The check process (checksum), in the field of data processing and data communication, is used to check the sum of a set of data items of a destination, which is usually in the form of a hexadecimal representation. If the checksum value exceeds the hexadecimal FF, i.e., 255, the complement thereof is required as a checksum, which is generally used to ensure the integrity and accuracy of data in communications, especially in long-distance communications, and will not be described in detail herein for those skilled in the art.
Example four
As shown in fig. 5, a system for dolby transcoding of audio and video according to the fourth embodiment of the present application is coupled to a control center, and includes: a fetch splitting unit 301 and a dolby transcoding synthesizing unit 302, wherein,
the acquiring and splitting unit 301 is coupled to the dolby transcoding and synthesizing unit 302, and is configured to instruct a control center to acquire the audio and video that needs to be transcoded, and split the audio and video through the control center to obtain the audio and video.
The dolby transcoding synthesis unit 302 is coupled to the acquisition splitting unit 301, and is configured to instruct and monitor, through the control center, video transcoding operations in corresponding formats performed on the video obtained by the acquisition splitting unit 301 and dolby transcoding operations in corresponding formats performed on the audio obtained by the acquisition splitting unit 301, store the generated audio file and video file after monitoring that transcoding is completed, execute dolby synthesis on the audio file and video file generated after transcoding is completed, and output a dolby audio and video file.
The dolby transcoding synthesis unit 302 is further configured to instruct and monitor, by the control center, a video transcoding operation in a corresponding format performed on the video obtained by the obtaining and splitting unit 301 according to a video bitrate corresponding to the dolby bitrate, complete a dolby transcoding operation in a corresponding format performed on the audio obtained by the obtaining and splitting unit 301 through cooperation of an audio transcoding machine and a DP600 transcoding machine, store the generated audio file and video file after monitoring that transcoding is completed, perform dolby synthesis on the audio file and video file generated after transcoding is completed, and output a dolby audio and video file;
and the video code rate corresponding to the dolby code rate is automatically detected by the control center according to the dolby code rate to obtain the video code rate corresponding to the video.
The DP600 transcoder is further a chip for encoding, decoding, converting and transcoding the audio.
Since the method has already been described in detail in the embodiments of the present application, the expanded description of the corresponding parts of the system and the method related in the embodiments is omitted here, and will not be described again. The description of the specific contents in the system may refer to the contents of the method embodiments, which are not limited in detail herein.
Compared with the prior art, the method and the system for carrying out dolby transcoding on the audio and video achieve the following effects:
1) the method integrates dolby transcoding and video transcoding, reduces workload and resource occupation, increases transcoding capacity of cloud transcoding, also increases reusability of functions and maintainability of a system, and conveniently manages transcoding tasks in a unified manner, so that transcoding requirements of a large number of videos are met in performance.
2) The method and the device ensure the uniformity of the external interface, and can effectively track and monitor the audio transcoding and video transcoding tasks; the existing processes of distributing, checking, notifying and the like are adopted, so that the development cost is saved.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (7)
1. A method for Dolby transcoding of audio and video is characterized by comprising the following steps:
acquiring the audio and video needing transcoding by a control center, and splitting the audio and video by the control center to obtain audio and video;
the control center indicates and monitors video transcoding operation of the video in the corresponding format and dolby transcoding operation of the audio in the corresponding format, stores the generated audio file and video file after monitoring that transcoding is completed, executes dolby synthesis on the audio file and video file generated after transcoding is completed, and outputs a dolby audio and video file.
2. The method of dolby transcoding of audio/video according to claim 1, wherein the dolby transcoding operation of the audio in the corresponding format further comprises:
and completing the dolby transcoding operation of the corresponding format on the audio through the cooperation of the audio transcoding machine and the DP600 transcoding machine.
3. The method of dolby transcoding of audio/video as claimed in claim 1, wherein the video transcoding operation of the corresponding format on the video is further:
carrying out video transcoding operation of a corresponding format on the video according to the video code rate corresponding to the dolby code rate; wherein,
and the video code rate corresponding to the dolby code rate is automatically detected by the control center according to the dolby code rate to obtain the video code rate corresponding to the video.
4. The method of dolby transcoding of audio/video of claim 2, wherein the DP600 transcoder is further a chip for encoding, decoding, converting and transcoding the audio.
5. A system for dolby transcoding of audio and video, the system comprising: a splitting unit and a dolby transcoding synthesis unit are obtained, wherein,
the acquisition and splitting unit is used for indicating a control center to acquire the audio and video needing transcoding, and splitting the audio and video through the control center to obtain audio and video;
the dolby transcoding synthesis unit is used for indicating and monitoring video transcoding operation of corresponding formats performed on the videos obtained by the obtaining and splitting unit and dolby transcoding operation of corresponding formats performed on the audios obtained by the obtaining and splitting unit through the control center, storing the generated audio files and video files after monitoring that transcoding is completed, executing dolby synthesis on the audio files and video files generated after transcoding is completed, and outputting dolby audio and video files.
6. The system for dolby transcoding of audio/video according to claim 5, wherein the dolby transcoding synthesis unit is further configured to instruct and monitor, by the control center, a video transcoding operation of a corresponding format performed on the video obtained by the obtaining and splitting unit according to a video bitrate corresponding to the dolby bitrate, complete a dolby transcoding operation of a corresponding format performed on the audio obtained by the obtaining and splitting unit through cooperation of an audio transcoding machine and a DP600 transcoding machine, store the generated audio file and video file after monitoring that transcoding is completed, perform dolby synthesis on the audio file and video file generated after transcoding is completed, and output a dolby audio/video file;
and the video code rate corresponding to the dolby code rate is automatically detected by the control center according to the dolby code rate to obtain the video code rate corresponding to the video.
7. The system for dolby transcoding of audio/video according to claim 6, wherein the DP600 transcoder is further a chip for encoding, decoding, converting and transcoding the audio.
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| CN112134999B (en) * | 2020-09-18 | 2021-12-03 | 咪咕文化科技有限公司 | Method and device for processing video color ring and computer readable storage medium |
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