CN107426611B - multi-path output method and system based on video transcoding - Google Patents
multi-path output method and system based on video transcoding Download PDFInfo
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- 230000000007 visual effect Effects 0.000 claims abstract description 21
- 238000006243 chemical reaction Methods 0.000 claims description 21
- 238000012163 sequencing technique Methods 0.000 claims description 5
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000005215 recombination Methods 0.000 description 2
- 230000006798 recombination Effects 0.000 description 2
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- 238000012986 modification Methods 0.000 description 1
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Classifications
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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]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/44—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs
- H04N21/4402—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display
- H04N21/440218—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream or rendering scenes according to encoded video stream scene graphs involving reformatting operations of video signals for household redistribution, storage or real-time display by transcoding between formats or standards, e.g. from MPEG-2 to MPEG-4
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/234—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs
- H04N21/23418—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs involving operations for analysing video streams, e.g. detecting features or characteristics
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/234—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs
- H04N21/2343—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements
- H04N21/234318—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements by decomposing into objects, e.g. MPEG-4 objects
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
- H04N21/234—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs
- H04N21/2343—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements
- H04N21/234336—Processing of video elementary streams, e.g. splicing of video streams or manipulating encoded video stream scene graphs involving reformatting operations of video signals for distribution or compliance with end-user requests or end-user device requirements by media transcoding, e.g. video is transformed into a slideshow of still pictures or audio is converted into text
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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]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/431—Generation of visual interfaces for content selection or interaction; Content or additional data rendering
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Compression Or Coding Systems Of Tv Signals (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Abstract
the invention discloses a multi-output method and a multi-output system based on video transcoding.A visual interface is provided with parameters, and instantiation objects of the set related parameters are put into an internal memory of a processor, and stack objects are created, and the instantiation objects are added into an internal memory stack and are sequenced; a transcoding main thread reads an original video to perform transcoding processing; decomposing the video stream, and recombining the video stream and the audio stream according to the set parameters according to the read video parameters to be converted; and merging the recombined video stream and audio stream into new streaming media data, compressing the new streaming media data into an entity physical file, removing the converted instance object from the stack and reading the next instance object. The invention can simultaneously output a plurality of paths of videos corresponding to different networks and different devices according to the setting of the visual interface, thereby reducing the time for manually setting and converting the videos by the user to adapt to the network and the mobile device.
Description
Technical Field
The invention relates to the technical field of computers, in particular to a multi-channel output method and a multi-channel output system based on video transcoding.
Background
the current output process of transcoding is: the traditional video transcoding in a stream-oriented mode is operated in a data stream-oriented mode for a long time due to the characteristics of video data and the huge and linear storage format of data volume. The working principle of the system is the same as that of a system converter, continuous NTSC system signals are input at an input end, and real-time PAL system signals are output at an output end.
the technical problem of the existing transcoding output is as follows: the method has the advantages that the transcoding result can be output in real time or in a near real time mode, the transcoding algorithm is solidified on the board card chip, the transcoding work is basically completed by hardware, and the stability is good. But the disadvantage is also obvious, the transcoding unit aims at a specific source coding mode and a specific target coding mode, a user basically cannot control the size and the additional information of the code stream, and the flexibility is poor. In order to meet the requirements of real-time processing, the quality of some images must be sacrificed sometimes. Another disadvantage is that the input and output of such streaming based video transcoding are substantially synchronous and cannot be transcoded at a faster than real-time rate.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention discloses a multi-path output method and a multi-path output system based on video transcoding. The invention can simultaneously output a plurality of paths of videos corresponding to different networks and different devices according to the setting of the visual interface, thereby reducing the time for manually setting and converting the videos by the user to adapt to the network and the mobile device.
In order to achieve the purpose, the invention adopts the following specific scheme:
The multi-output method based on video transcoding comprises the following steps:
Setting parameters on a visual interface, instantiating the set related parameters into an internal memory of a processor, creating a stack object, adding the instantiated object into a memory stack, and sequencing;
the transcoding main thread reads the original video for transcoding processing, temporarily writes the video stream into an internal memory, reads stack data, and reads video data to be transcoded from top to bottom in sequence;
decomposing the video stream: decomposing the video and audio into video and audio, and recombining the video stream and the audio stream according to the set parameters according to the read video parameters to be converted;
And merging the recombined video stream and audio stream into new streaming media data, compressing the new streaming media data into an entity physical file, removing the converted instance object from the stack, reading the next instance object until no more data exists in the stack, and ending.
Further, when the set related parameter instantiation objects are stored in an internal memory of the processor, the processor analyzes the number of video transcoding paths according to the setting set on the user visual interface to process, reads the parameter setting selected by the user on the page, and instantiates each path of video into one object.
furthermore, when the stack object is created, the processor creates a transcoding stack according to the number of paths, and creates a transcoding virtual object corresponding to the number of paths according to the set number of conversion paths.
Further, transcoding: all conversion objects in the circular stack output the final conversion video of each path and are named according to the corresponding resolution and the original file name;
And copying all the converted videos to a folder named by the original file name under the set conversion directory, and deleting the file temporarily converted in the previous step.
Further, the parameters set on the visual interface are as follows: the number of converted paths and the parameters of each path of video selected by the user on the interface are added into the memory stack by the instantiation object, and all the paths and the parameters of each path are stored in the form of the object.
The video transcoding-based multi-output system comprises a processor and a memory;
executing the following program instructions in a processor:
Setting parameters on a visual interface, instantiating the set related parameters into an internal memory of a processor, creating a stack object, adding the instantiated object into a memory stack, and sequencing;
The transcoding main thread reads the original video for transcoding processing, temporarily writes the video stream into an internal memory, reads stack data, and reads video data to be transcoded from top to bottom in sequence;
decomposing the video stream: decomposing the video and audio into video and audio, and recombining the video stream and the audio stream according to the set parameters according to the read video parameters to be converted;
And merging the recombined video stream and audio stream into new streaming media data, compressing the new streaming media data into an entity physical file, removing the converted instance object from the stack, reading the next instance object until no more data exists in the stack, and ending.
further, when the set related parameter instantiation objects are stored in an internal memory of the processor, the processor analyzes the number of video transcoding paths according to the setting set on the user visual interface to process, reads the parameter setting selected by the user on the page, and instantiates each path of video into one object.
Furthermore, when the stack object is created, the processor creates a transcoding stack according to the number of paths, and creates a transcoding virtual object corresponding to the number of paths according to the set number of conversion paths.
Further, transcoding: all conversion objects in the circular stack output the final conversion video of each path and are named according to the corresponding resolution and the original file name;
and copying all the converted videos to a folder named by the original file name under the set conversion directory, and deleting the file temporarily converted in the previous step.
further, the parameters set on the visual interface are as follows: the number of converted paths and the parameters of each path of video selected by the user on the interface are added into the memory stack by the instantiation object, and all the paths and the parameters of each path are stored in the form of the object.
the invention has the beneficial effects that:
1. the invention adopts pure software type coding without adopting other hardware equipment.
2. The invention can simultaneously output a plurality of paths of videos corresponding to different networks and different devices according to the setting of the visual interface, thereby reducing the time for manually setting and converting the videos by the user to adapt to the network and the mobile device.
drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.
FIG. 1 is a flow chart of the multiplexing of the present invention.
the specific implementation mode is as follows:
The invention is described in detail below with reference to the accompanying drawings:
it should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
it is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
In an exemplary embodiment of the present application, as shown in fig. 1, a method for multiplexing output based on video transcoding includes:
starting one file to multiple paths;
analyzing the number of video transcoding paths according to the setting set on a user visual interface, processing, reading the parameter setting selected by a user on a page, and instantiating each path of video into an object;
creating a transcoding stack according to the number of paths;
A transcoding stack, which creates a transcoding virtual object corresponding to the number of conversion paths according to the set number of conversion paths, if 3 conversion paths are set, 3 objects are created, and each object contains basic information of the conversion path, such as the resolution, the code stream and the like;
transcoding, namely, circularly circulating all conversion objects in the stack, outputting the final conversion video of each path, and naming the conversion video by corresponding resolution and an original file name;
and copying all the converted videos to a folder named by the original file name in a set conversion directory, deleting the files temporarily converted in the previous step, and ending.
The method comprises the steps of providing a visual page, selecting the resolution to be converted for a user by providing an interface for a desktop application program which is independently developed, selecting more than one path, and enabling the user to set the path number to be output independently.
it should be explained that: the specific steps of outputting one path are as follows:
1. firstly, recording the number of converted paths selected by a user on an interface and parameters of each path of video.
2. the memory creates a stack object, stores all the paths and the parameters of the paths in the form of objects and arranges the objects in sequence.
3. and the video conversion main thread reads the data in the stack from top to bottom, removes the video object from the stack after converting one path successfully, and reads the next video object again until all the objects are completely removed.
In another exemplary embodiment of the present application, a method for multiplexing output based on video transcoding includes the following steps:
1. Recording the parameters selected by the user on the visual interface;
2. Recording related parameters, instantiating the object to a memory, creating a stack object, adding the instantiated object to a memory stack, and sequencing;
3. The transcoding main thread reads the original video and temporarily writes the video stream into a memory;
4. the transcoding main thread reads stack data and sequentially reads video data to be transcoded from top to bottom;
5. Decomposing a video stream into video and audio;
6. recombining the video stream and the audio stream according to the set parameters according to the read video parameters to be converted;
7. Combining the recombined video stream and audio stream into new stream media data, and compressing the new stream media data into an entity physical file;
8. Removing the converted instance object from the stack and reading the next instance object;
9. And ending until no more data exists in the stack.
In another exemplary embodiment of the present application, a video transcoding-based multi-output system includes:
the module comprises a visual configuration interface, a video transcoding main service and a core video compression recombination component;
A visual configuration interface: providing to a user selection interface;
Video transcoding main service: reading interface selection parameters, creating a transcoding queue, and calling a video compression component;
The video compression recombination component: and (6) transcoding the video.
although the embodiments of the present invention have been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and it should be understood by those skilled in the art that various modifications and variations can be made without inventive efforts by those skilled in the art based on the technical solution of the present invention.
Claims (8)
1. the multi-output method based on video transcoding is characterized by comprising the following steps of:
Setting parameters on a visual interface, instantiating the set related parameters into an internal memory of a processor, creating a stack object, adding the instantiated object into a memory stack, and sequencing;
The transcoding main thread reads the original video for transcoding processing, temporarily writes the video stream into an internal memory, reads stack data, and reads video data to be transcoded from top to bottom in sequence;
Decomposing the video stream: decomposing the video and audio into video and audio, and recombining the video stream and the audio stream according to the set parameters according to the read video parameters to be converted;
merging the recombined video stream and audio stream into new stream media data, compressing the new stream media data into an entity physical file, removing the converted instance object from the stack and reading the next instance object until no more data exists in the stack, and ending;
the transcoding process is to convert all objects in the circular stack, output the converted video of each path finally, and name the converted video with corresponding resolution and original file name;
And copying all the converted videos to a folder named by the original file name under the set conversion directory, and deleting the file temporarily converted in the previous step.
2. the method as claimed in claim 1, wherein when the set related parameters are instantiated into the internal memory of the processor, the processor analyzes the number of video transcoding paths according to the set on the user visual interface, reads the parameter setting selected by the user on the page, and instantiates each path of video into an object.
3. the method as claimed in claim 1, wherein the processor creates a transcoding stack according to the number of paths when creating the stack object, and creates a transcoding virtual object corresponding to the number of paths according to the set number of conversion paths.
4. the method for multi-output based on video transcoding of claim 1, wherein the parameters set on the visual interface are as follows: the number of converted paths and the parameters of each path of video selected by the user on the interface are added into the memory stack by the instantiation object, and all the paths and the parameters of each path are stored in the form of the object.
5. The multi-output system based on video transcoding is characterized by comprising a processor and a memory;
executing the following program instructions in a processor:
Setting parameters on a visual interface, instantiating the set related parameters into an internal memory of a processor, creating a stack object, adding the instantiated object into a memory stack, and sequencing;
the transcoding main thread reads the original video for transcoding processing, temporarily writes the video stream into an internal memory, reads stack data, and reads video data to be transcoded from top to bottom in sequence;
Decomposing the video stream: decomposing the video and audio into video and audio, and recombining the video stream and the audio stream according to the set parameters according to the read video parameters to be converted;
merging the recombined video stream and audio stream into new stream media data, compressing the new stream media data into an entity physical file, removing the converted instance object from the stack and reading the next instance object until no more data exists in the stack, and ending;
the transcoding process is to convert all objects in the circular stack, output the converted video of each path finally, and name the converted video with corresponding resolution and original file name;
and copying all the converted videos to a folder named by the original file name under the set conversion directory, and deleting the file temporarily converted in the previous step.
6. The video transcoding-based multi-output system as claimed in claim 5, wherein when the set related parameters are instantiated into the internal memory of the processor, the processor analyzes the number of video transcoding paths according to the set settings on the user visual interface for processing, reads the parameter settings selected by the user on the page, and instantiates each path of video into one object.
7. The video transcoding-based multi-output system of claim 5, wherein when creating the stack object, the processor creates a transcoding stack according to the number of paths, and creates a transcoding virtual object corresponding to the number of paths according to the set number of conversion paths.
8. The video transcoding based multi-output system of claim 5, wherein the visual interface is configured to set the parameters: the number of converted paths and the parameters of each path of video selected by the user on the interface are added into the memory stack by the instantiation object, and all the paths and the parameters of each path are stored in the form of the object.
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| CN103581754A (en) * | 2012-07-20 | 2014-02-12 | 腾讯科技（深圳）有限公司 | Data display method and intelligent equipment |
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| CN104539978A (en) * | 2014-12-19 | 2015-04-22 | 南京工业大学 | Video transcoding system method under cloud environment |
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