CN104796732A - Audio and video editing method and device - Google Patents
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- CN104796732A CN104796732A CN201510190641.2A CN201510190641A CN104796732A CN 104796732 A CN104796732 A CN 104796732A CN 201510190641 A CN201510190641 A CN 201510190641A CN 104796732 A CN104796732 A CN 104796732A
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- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000005520 cutting process Methods 0.000 claims description 19
- 230000005540 biological transmission Effects 0.000 claims description 7
- 230000010076 replication Effects 0.000 claims description 3
- 238000009826 distribution Methods 0.000 claims description 2
- 238000003491 array Methods 0.000 abstract 4
- 238000010586 diagram Methods 0.000 description 13
- 238000004590 computer program Methods 0.000 description 7
- 230000006870 function Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
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]
- H04N21/20—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
-
- 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
- H04N21/234381—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 altering the temporal resolution, e.g. decreasing the frame rate by frame skipping
-
- 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
- H04N21/25—Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
- H04N21/266—Channel or content management, e.g. generation and management of keys and entitlement messages in a conditional access system, merging a VOD unicast channel into a multicast channel
- H04N21/2662—Controlling the complexity of the video stream, e.g. by scaling the resolution or bitrate of the video stream based on the client capabilities
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Databases & Information Systems (AREA)
- Television Signal Processing For Recording (AREA)
- Signal Processing For Digital Recording And Reproducing (AREA)
Abstract
The invention discloses an audio and video editing method and device for improving matching accuracy of different code rates of audio and video data streams and realizing accurate matching of the audio and video data streams of different code rates. The audio and video editing method includes steps of decoding received audio and video information to obtain decoded audio and video data; copying the decoded audio and video data to obtain two arrays of same audio and video data; encoding the two arrays of same audio and video data to obtain two arrays of data streams of different code rates after encoding, and controlling the first frames of two arrays of data streams after encoding as key frames. Audio and video playing disorder generated by that low-code-rate data streams are not matched with high-code-rate data streams is avoided, matching accuracy of the audio and video data streams of different code rates is improved, and accurate matching of the audio and video data streams of different code rates is realized.
Description
Technical Field
The invention relates to the technical field of internet, in particular to an audio and video editing method and device.
Background
Through the rapid development of internet technology in recent years, the service of the internet is increasing, and people are increasingly exposed to various audios and videos based on the internet, for example, people can obtain and watch network integrated programs, network movies and the like through a network television.
When these various audios and videos are used, it is inevitable to edit part of the audios and videos, for example, to perform processing such as cutting, deleting, adding, etc. on the audios and videos. When audio and video is cut and the like, the following situations may occur: the transmission code rates of the data streams corresponding to the same audio and video data are different; under the condition, when the audio and video is edited, for example, when the audio and video is cut, it is required to ensure that data streams with different code rates can be accurately matched, otherwise, the played audio and video will be disordered.
Disclosure of Invention
The invention provides an audio and video editing method and device, which are used for improving the matching accuracy of audio and video data streams with different code rates and realizing the accurate matching of the audio and video data streams with different code rates.
The invention provides an audio and video editing method, which comprises the following steps:
decoding the received audio and video information to obtain decoded audio and video data;
copying the decoded audio and video data to obtain two audio and video data with the same queue;
and respectively coding the audio and video data with the same two queues to obtain two rows of data streams with different code rates after coding, and controlling the first frames of the two rows of data streams after coding to be key frames.
In an embodiment, the decoding the received audio and video information to obtain a decoded audio and video data stream includes:
decoding the received audio and video information in real time;
and cutting the audio and video data obtained after decoding according to the length of a preset frame to obtain a cut audio and video data stream.
In an embodiment, the cutting the decoded audio and video data according to the length of the preset frame to obtain a cut audio and video data stream includes:
and cutting the decoded audio and video data according to the frame length of 250 frames to obtain a cut transmission stream file.
In an embodiment, the copying the decoded audio/video data to obtain two queues of identical audio/video data includes:
copying each audio-video data stream obtained after decoding into two identical audio-video data streams;
and respectively enabling the two copied same audio and video data streams to enter two data queues to obtain the audio and video data with the same queues.
In an embodiment, the encoding the audio and video data with the same queues respectively to obtain two columns of data streams with different code rates after encoding, and controlling the first frames of the two columns of data streams after encoding to be key frames, includes:
respectively coding the audio and video data with the same two queues to obtain a first row of data streams with low code rate and a second row of data streams with high code rate;
controlling the first frames of the first row of data streams and the second row of data streams to be key frames;
wherein the first column of data streams comprises: the code rate is lower than the data flow of the first threshold value; the second column data stream comprises: and the code rate is higher than the data stream of the second threshold value.
Corresponding to the above audio and video editing method, an embodiment of the present invention further provides an audio and video editing apparatus, including:
the decoding module is used for decoding the received audio and video information to obtain decoded audio and video data;
the copying module is used for copying the decoded audio and video data to obtain the audio and video data with the same two queues;
and the coding module is used for coding the audio and video data with the same two queues respectively to obtain two columns of data streams with different code rates after coding, and controlling the first frames of the two columns of data streams after coding to be key frames.
In one embodiment, the decoding module comprises:
the decoding unit is used for decoding the received audio and video information in real time;
and the cutting unit is used for cutting the audio and video data obtained after decoding according to the length of the preset frame to obtain the cut audio and video data stream.
In one embodiment, the cutting unit is further configured to:
and cutting the decoded audio and video data according to the frame length of 250 frames to obtain a cut transmission stream file.
In one embodiment, the replication module comprises:
the copying unit is used for copying each audio and video data stream obtained after decoding into two identical audio and video data streams;
and the distribution unit is used for enabling the two copied same audio and video data streams to respectively enter the two data queues to obtain the audio and video data with the same two queues.
In one embodiment, the encoding module comprises:
the encoding unit is used for respectively encoding the audio and video data with the same queues to obtain a first row of data streams with low code rate and a second row of data streams with high code rate;
the control unit is used for controlling the first frames of the first row of data streams and the second row of data streams to be key frames;
wherein the first column of data streams comprises: the code rate is lower than the data flow of the first threshold value; the second column data stream comprises: and the code rate is higher than the data stream of the second threshold value.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
fig. 1 is a flow diagram illustrating an audio-video editing method in accordance with an exemplary embodiment of the present invention;
fig. 2 is a flowchart illustrating a step S10 in an audio-video editing method according to an exemplary embodiment of the present invention;
fig. 3 is a flowchart illustrating a step S20 in an audio-video editing method according to an exemplary embodiment of the present invention;
fig. 4 is a flowchart illustrating a step S30 in an audio-video editing method according to an exemplary embodiment of the present invention;
fig. 5 is a block diagram of an audiovisual editing device in accordance with an exemplary embodiment of the present invention;
fig. 6 is a block diagram illustrating a decoding module 60 in an audio-video editing apparatus according to an exemplary embodiment of the present invention;
fig. 7 is a block diagram illustrating a copy module 70 in an audiovisual editing apparatus according to an exemplary embodiment of the present invention;
fig. 8 is a block diagram of an encoding module 80 in an audio-video editing apparatus according to an exemplary embodiment of the present invention.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
The embodiment of the invention provides an audio and video editing method, which is used for improving the matching accuracy of audio and video data streams with different code rates and realizing the accurate matching of the audio and video data streams with different code rates. As shown in fig. 1, an audio/video editing method in an embodiment of the present invention includes steps S10 to S30:
step S10, decoding the received audio and video information to obtain decoded audio and video data;
after receiving the audio and video information, decoding the audio and video information to obtain decoded audio and video data; for example, the television signal is decoded in real time to obtain decoded corresponding audio and video data.
In one embodiment, as shown in FIG. 2, step S10 may be implemented as steps S101-S102:
step S101, decoding received audio and video information in real time;
and S102, cutting the audio and video data obtained after decoding according to the length of a preset frame to obtain a cut audio and video data stream.
In order to improve the audio and video editing efficiency, after the audio and video information is received, the received audio and video information is decoded in real time, and the decoded audio and video data is cut according to the length of a preset frame to obtain the cut audio and video data.
In one embodiment, the decoded audio and video data is cut according to a frame length of 250 frames, so as to obtain a cut Transport Stream (TS) file. Since one TS file is typically 10 seconds, according to the usual transmission speed, 25 frames are typically transmitted for 1 second, and 10 seconds can be transmitted just for 250 frames. Therefore, after the audio and video data is cut according to the frame length of 250 frames, the TS file commonly used in audio and video editing can be obtained.
Step S20, copying the decoded audio and video data to obtain audio and video data with the same two queues;
and copying the decoded audio and video data to obtain the audio and video data of two queues with completely same contents.
In one embodiment, as shown in FIG. 3, step S20 may be implemented as steps S201-S202:
step S201, copying each audio and video data stream obtained after decoding into two identical audio and video data streams;
when the decoded audio and video data are copied, copying each segment of audio and video data stream for the cut data stream to obtain two audio and video data streams with the same content.
Step S202, the two copied same audio and video data streams enter two data queues respectively to obtain the audio and video data with the same two queues.
After two identical audio and video data streams are duplicated, the two audio and video data streams enter two data queues respectively, and therefore the two audio and video data queues identical to each other can be obtained.
And step S30, respectively encoding the audio and video data with the same queues to obtain two columns of data streams with different code rates after encoding, and controlling the first frames of the two columns of data streams after encoding to be key frames.
And after the audio and video data with the same two queues are obtained, the audio and video data of the two queues are respectively coded. During coding, different coding strategies are adopted, so that two columns of data streams with different code rates after coding are obtained. But the first frames of the two columns of data streams after control coding are both key frames.
In one embodiment, as shown in FIG. 4, step S30 may be implemented as steps S301-S302:
step S301, encoding the audio and video data with the same two queues respectively to obtain a first row of data streams with low code rate and a second row of data streams with high code rate;
step S302, controlling the first frames of the first row of data streams and the second row of data streams to be both key frames.
When the audio and video data with the same two queues are coded, the audio and video data of the two queues are coded to obtain data streams with different code rates; therefore, after the encoding, a first column data stream with a low code rate and a second column data stream with a high code rate are obtained. Wherein the first column of data streams comprises: the code rate is lower than the data flow of the first threshold value; the second column data stream comprises: and the code rate is higher than the data stream of the second threshold value.
In one embodiment, the resulting low rate data stream can be understood as: transmitting 512K of data per second, or transmitting data lower than 512K of data per second; the obtained high-rate data stream can be understood as: 4M data are transmitted per second, or 8M data are transmitted per second, or a higher rate video data stream.
According to the method provided by the embodiment of the invention, the received audio and video information is decoded to obtain decoded audio and video data; copying the decoded audio and video data to obtain two audio and video data with the same queue; respectively coding the audio and video data with the same two queues to obtain two rows of data streams with different code rates after coding, and controlling the first frames of the two rows of data streams after coding to be key frames; the phenomenon of disordered audio and video playing possibly caused by mismatching of the low-code-rate data stream and the high-code-rate data stream is avoided, the matching accuracy of audio and video data streams with different code rates is improved, and the accurate matching of the audio and video data streams with different code rates is realized.
The invention also provides an audio and video editing device corresponding to the audio and video editing method provided by the embodiment of the invention; as shown in fig. 5, the audio-video editing apparatus includes: a decoding module 60, a copying module 70 and an encoding module 80. Wherein,
the decoding module 60 is configured to decode the received audio/video information to obtain decoded audio/video data;
in one embodiment, as shown in fig. 6, the decoding module 60 includes:
the decoding unit 601 is configured to decode the received audio and video information in real time;
and a cutting unit 602, configured to cut the decoded audio and video data according to a preset frame length, so as to obtain a cut audio and video data stream.
Wherein, in one embodiment, the cutting unit 602 is further configured to: and cutting the decoded audio and video data according to the frame length of 250 frames to obtain a cut transmission stream file.
The copying module 70 is configured to copy the decoded audio/video data to obtain two audio/video data with the same queue;
in one embodiment, as shown in FIG. 7, the replication module 70 includes:
a copying unit 701, configured to copy each audio-video data stream obtained after decoding into two identical audio-video data streams;
the allocating unit 702 is configured to enable the two copied identical audio and video data streams to enter two data queues respectively, so as to obtain two identical audio and video data queues.
The encoding module 80 is configured to encode the audio and video data with the same two queues respectively to obtain two columns of data streams with different code rates after encoding, and control a first frame of the two columns of data streams after encoding to be a key frame.
In one embodiment, as shown in fig. 8, the encoding module 80 includes:
the encoding unit 801 is configured to encode the audio and video data with the same two queues respectively to obtain a first line of data streams with a low code rate and a second line of data streams with a high code rate; wherein the first column of data streams comprises: the code rate is lower than the data flow of the first threshold value; the second column data stream comprises: and the code rate is higher than the data stream of the second threshold value.
The control unit 802 is configured to control that the first frames of the first row of data streams and the second row of data streams are both key frames.
According to the device provided by the embodiment of the invention, the received audio and video information is decoded to obtain decoded audio and video data; copying the decoded audio and video data to obtain two audio and video data with the same queue; respectively coding the audio and video data with the same two queues to obtain two rows of data streams with different code rates after coding, and controlling the first frames of the two rows of data streams after coding to be key frames; the phenomenon of disordered audio and video playing possibly caused by mismatching of the low-code-rate data stream and the high-code-rate data stream is avoided, the matching accuracy of audio and video data streams with different code rates is improved, and the accurate matching of the audio and video data streams with different code rates is realized.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention 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, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. An audio-video editing method, characterized by comprising:
decoding the received audio and video information to obtain decoded audio and video data;
copying the decoded audio and video data to obtain two audio and video data with the same queue;
and respectively coding the audio and video data with the same two queues to obtain two rows of data streams with different code rates after coding, and controlling the first frames of the two rows of data streams after coding to be key frames.
2. The method of claim 1, wherein decoding the received audio-video information to obtain a decoded audio-video data stream comprises:
decoding the received audio and video information in real time;
and cutting the audio and video data obtained after decoding according to the length of a preset frame to obtain a cut audio and video data stream.
3. The method of claim 2, wherein the cutting the decoded audio and video data according to the preset frame length to obtain a cut audio and video data stream comprises:
and cutting the decoded audio and video data according to the frame length of 250 frames to obtain a cut transmission stream file.
4. A method as claimed in claim 1, 2 or 3, wherein said copying the decoded audio-video data to obtain two queues of identical audio-video data comprises:
copying each audio-video data stream obtained after decoding into two identical audio-video data streams;
and respectively enabling the two copied same audio and video data streams to enter two data queues to obtain the audio and video data with the same queues.
5. The method as claimed in claim 1, 2 or 3, wherein the step of respectively encoding the audio/video data with the same queue to obtain two columns of data streams with different code rates after encoding, and controlling the first frames of the two columns of data streams after encoding to be key frames comprises the steps of:
respectively coding the audio and video data with the same two queues to obtain a first row of data streams with low code rate and a second row of data streams with high code rate;
controlling the first frames of the first row of data streams and the second row of data streams to be key frames;
wherein the first column of data streams comprises: the code rate is lower than the data flow of the first threshold value; the second column data stream comprises: and the code rate is higher than the data stream of the second threshold value.
6. An audio-video editing apparatus, comprising:
the decoding module is used for decoding the received audio and video information to obtain decoded audio and video data;
the copying module is used for copying the decoded audio and video data to obtain the audio and video data with the same two queues;
and the coding module is used for coding the audio and video data with the same two queues respectively to obtain two columns of data streams with different code rates after coding, and controlling the first frames of the two columns of data streams after coding to be key frames.
7. The apparatus of claim 6, wherein the decoding module comprises:
the decoding unit is used for decoding the received audio and video information in real time;
and the cutting unit is used for cutting the audio and video data obtained after decoding according to the length of the preset frame to obtain the cut audio and video data stream.
8. The apparatus of claim 7, wherein the cutting unit is further configured to:
and cutting the decoded audio and video data according to the frame length of 250 frames to obtain a cut transmission stream file.
9. The apparatus of claim 6, 7 or 8, wherein the replication module comprises:
the copying unit is used for copying each audio and video data stream obtained after decoding into two identical audio and video data streams;
and the distribution unit is used for enabling the two copied same audio and video data streams to respectively enter the two data queues to obtain the audio and video data with the same two queues.
10. The apparatus of claim 6, 7 or 8, wherein the encoding module comprises:
the encoding unit is used for respectively encoding the audio and video data with the same queues to obtain a first row of data streams with low code rate and a second row of data streams with high code rate;
the control unit is used for controlling the first frames of the first row of data streams and the second row of data streams to be key frames;
wherein the first column of data streams comprises: the code rate is lower than the data flow of the first threshold value; the second column data stream comprises: and the code rate is higher than the data stream of the second threshold value.
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