CN108174284B - Android system-based video decoding method - Google Patents
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- 238000000034 method Methods 0.000 title claims abstract description 36
- 238000005516 engineering process Methods 0.000 claims description 6
- 230000005540 biological transmission Effects 0.000 claims description 4
- 238000013500 data storage Methods 0.000 claims description 3
- 239000012634 fragment Substances 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
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- 230000000750 progressive effect Effects 0.000 description 2
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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
-
- 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
- H04N21/434—Disassembling of a multiplex stream, e.g. demultiplexing audio and video streams, extraction of additional data from a video stream; Remultiplexing of multiplex streams; Extraction or processing of SI; Disassembling of packetised elementary 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]
- H04N21/40—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
- H04N21/438—Interfacing the downstream path of the transmission network originating from a server, e.g. retrieving encoded video stream packets from an IP network
- H04N21/4385—Multiplex stream processing, e.g. multiplex stream decrypting
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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
- H04N21/83—Generation or processing of protective or descriptive data associated with content; Content structuring
- H04N21/845—Structuring of content, e.g. decomposing content into time segments
- H04N21/8456—Structuring of content, e.g. decomposing content into time segments by decomposing the content in the time domain, e.g. in time segments
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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
- H04N21/85—Assembly of content; Generation of multimedia applications
- H04N21/854—Content authoring
- H04N21/85406—Content authoring involving a specific file format, e.g. MP4 format
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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
- H04N21/85—Assembly of content; Generation of multimedia applications
- H04N21/858—Linking data to content, e.g. by linking an URL to a video object, by creating a hotspot
- H04N21/8586—Linking data to content, e.g. by linking an URL to a video object, by creating a hotspot by using a URL
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- Computer Security & Cryptography (AREA)
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Abstract
The invention discloses a video decoding method based on an Android system, and relates to the technical field of video decoding and playing. According to the method, an M3U8 protocol is analyzed on an Android system, then TS is unpacked, then h.264/aac is decoded and played on the Android system (the equipment of the Android system can play mp4 format h.264/aac coded videos), in the using process, an Android user downloads an M3U8 file, each specific small segment of video under an index list is played through an index address of the M3U8 file, analysis and playing of the video file under the M3U8 index list on the Android equipment are achieved, and cross-platform and cross-equipment video on-demand and live broadcast experience of streaming media is achieved.
Description
Technical Field
The invention relates to the technical field of video decoding and playing, in particular to a video decoding method based on an Android system.
Background
The commonly used streaming media protocols mainly include HTTP progressive download and real-time streaming media protocol based on RTSP/RTP.
At present, HTTP progressive download protocol is convenient and good, wherein HTTP Live Streaming (HLS) of Apple company is a representative of the protocol, the HLS protocol is created by Apple company, HTTP-based streaming media transmission interactive protocol, and the HLS protocol supports automatic bit rate adaptation, and a Web server provides video streaming service to a communication terminal in HLS technology. It was originally developed by apple for mobile devices such as iPhone, iPod, iTouch and iPad, and is now in use on the desktop. In HLS technology, a Web server provides near real-time audio-video streams to clients. However, the standard HTTP protocol is used in the process of using, so that the on-demand and live broadcast can be directly provided on the common HTTP application by using the HLS technology. Video-related applications in AppStore are basically such techniques applied. The basic principle of the technique is to cut a video file or video stream into small pieces (ts) and create an index file (M3U 8). The supported video stream is encoded as h.264 and the audio stream is encoded as AAC.
The M3U8 file refers to an M3U file in UTF-8 encoding format. The M3U file records an index plain text file, and when it is opened, the playing software does not play it, but finds the network address of the corresponding audio/video file according to its index to play online. M3U8 is a video streaming media playing protocol introduced by apple Inc. for use on an iPhone handset, the video and audio format being encoded in h.264/aac and packetized using mpeg2 ts.
Under the condition of the prior art, the M3U8 protocol cannot be analyzed on an Android system-based device, that is, a streaming media file of the protocol cannot be played on an Android system-based terminal device, and the current solutions mainly include the following two types:
HTML playing, namely playing the streaming media file of the M3U8 protocol in the HTML.
The advantages are that: HTML is a streaming media file directly supporting the M3U8 protocol, regardless of the system issues of the terminal device.
The disadvantages are as follows: the experience is not good, and the originally developed player is not smooth and convenient to operate.
2. The browser disguises an Ipad mode, namely sets the Ipad mode in the browser of the Android device, and then plays the streaming media file of the type.
The advantages are that: disguised as Apple device access behavior and relatively simple to operate.
The disadvantages are as follows: the playing experience of the browser is not good, and the fact that the original equipment is a terminal based on an Android system and the playing fails is easy to detect.
Disclosure of Invention
The present invention is directed to provide a method for decoding a video based on an Android system, so as to solve the foregoing problems in the prior art.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a method for decoding videos based on an Android system comprises the following steps:
s1, acquiring an M3U8 file;
s2, analyzing the M3U8 file to obtain a TS package file;
s3, analyzing the TS packet file, directly obtaining the address of the TS video clip, or obtaining the address of the TS video clip after URL splicing is carried out on the index list of the TS video clip;
s4, creating a play task list, and storing the address of each TS video clip in the M3U8 file;
and S5, playing the TS video clips in the task list on the Android system-based equipment according to the address of each TS video clip.
Preferably, S1 is specifically: the file with the parsing is retrieved from a server storing the video file or from a device memory via a network transmission.
Preferably, in S1, if the M3U8 file is encrypted, the URL address of the key and the M3U8 index list ciphertext are obtained, the content decryption public key is obtained, and the M3U8 index list ciphertext is decrypted.
Preferably, S2 specifically is that the M3U8 file is parsed according to a series of tags in the M3U8 file, to obtain a URL address or a relative index address of the TS packet file, where the series of tags includes:
# EXTM3U, located in the first row of each M3U8 file;
# EXT-X-TARGETDURATION, for specifying the maximum media segment time length, which value appears only once in the M3U8 file;
# extinn, which describes the length of a single media file, has a value less than or equal to the value specified in the # EXT-X-target destination tag, which is followed by the URL address or relative index address of the TS packet file.
Preferably, in S3, the TS video clip address is a file name, a directory structure and a clip download address overlapping or complete with the download address directory of the M3U8 file;
the method for directly obtaining the TS video segment address or obtaining the TS video segment address after URL splicing is carried out on the TS video segment index list is implemented by adopting the following method:
opening a first-level file to obtain a TS video clip address;
or
After opening the primary file, carrying out URL splicing on the TS video clip index list, and acquiring a TS video clip address;
or
Directly acquiring the address of a secondary file in the primary file, directly acquiring the address of a TS video clip in the secondary file, or splicing the address of a secondary link in the secondary file to acquire the address of the TS video clip;
or
In the first-level file, the address of the spliced first-level link is obtained to the address of the second-level file, in the second-level file, the address of the TS video clip is directly obtained, or in the second-level file, the address of the spliced second-level link is obtained to the address of the TS video clip.
Preferably, S4 is specifically:
creating an array or sequence of play task lists, storing the index address of each TS video file obtained by analysis, and storing the play task lists into application data by using any one of the following android data storage technologies: SharedPreferences storage data, file storage data, SQLite or other database storage data, ContentProvider storage data, and network storage data.
Preferably, S5 is specifically: and transmitting the address of each TS video segment to a player, and acquiring a corresponding video stream file by the player according to the address to play.
The invention has the beneficial effects that: according to the method for decoding the video based on the Android system, provided by the embodiment of the invention, the M3U8 protocol is analyzed on the Android system, then the TS is unpacked, and then the h.264/aac is decoded and played on the Android system (the equipment of the Android system can play the video coded by the mp4 format h.264/aac), in the using process, an Android user downloads the M3U8 file, and the analysis and playing of the video file under the M3U8 index list are realized on the Android equipment through the index address of the M3U8 file and the specific small segment of the video under the index list, so that the cross-platform cross-equipment video on demand and live broadcast experience of streaming media are realized.
Drawings
Fig. 1 is a schematic flowchart of a method for decoding a video based on an Android system according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
As shown in fig. 1, an embodiment of the present invention provides a method for decoding a video based on an Android system, including the following steps:
s1, acquiring an M3U8 file;
s2, analyzing the M3U8 file to obtain a TS package file;
s3, analyzing the TS packet file, directly obtaining the address of the TS video clip, or obtaining the address of the TS video clip after URL splicing is carried out on the index list of the TS video clip;
s4, creating a play task list, and storing the address of each TS video clip in the M3U8 file;
and S5, playing the TS video clips in the task list on the Android system-based equipment according to the address of each TS video clip.
Wherein, S1 may specifically be: the file with the parsing is retrieved from a server storing the video file or from a device memory via a network transmission.
In the actual use process, the user downloads the M3U8 file.
In a preferred embodiment of the present invention, in S1, if the M3U8 file is encrypted, the URL address of the key and the M3U8 index list ciphertext are obtained, the content decryption public key is obtained, and the M3U8 index list ciphertext is decrypted.
By adopting the method, the decryption of the M3U8 file can be realized.
In this embodiment of the present invention, the S2 may specifically be that the M3U8 file is parsed according to a series of tags in the M3U8 file, so as to obtain a URL address or a relative index address of the TS packet file, where the series of tags include:
# EXTM3U, located in the first row of each M3U8 file;
# EXT-X-TARGETDURATION, for specifying the maximum media segment time length, which value appears only once in the M3U8 file;
# extinn, which describes the length of a single media file, has a value less than or equal to the value specified in the # EXT-X-target destination tag, which is followed by the URL address or relative index address of the TS packet file.
Because the M3U8 describes the media file in a text mode and consists of a series of labels, the analysis of the M3U8 file can be conveniently and quickly realized by adopting the method to obtain the URL address or the relative index address of the TS packet file.
In the embodiment of the present invention, in S3, the TS video clip address may be a file name, a directory structure, and a clip download address overlapping or complete with the download address directory of the M3U8 file;
the method for directly obtaining the TS video segment address or obtaining the TS video segment address after URL splicing is carried out on the TS video segment index list is implemented by adopting the following method:
opening a first-level file to obtain a TS video clip address;
or
After opening the primary file, carrying out URL splicing on the TS video clip index list, and acquiring a TS video clip address;
or
Directly acquiring the address of a secondary file in the primary file, directly acquiring the address of a TS video clip in the secondary file, or splicing the address of a secondary link in the secondary file to acquire the address of the TS video clip;
or
In the first-level file, the address of the spliced first-level link is obtained to the address of the second-level file, in the second-level file, the address of the TS video clip is directly obtained, or in the second-level file, the address of the spliced second-level link is obtained to the address of the TS video clip.
In actual use, the following four cases exist for the address of the TS video segment:
the first method comprises the following steps: the ts fragment address is a file name;
and the second method comprises the following steps: ts fragment address is directory structure;
and the third is that: the ts fragment address is in a directory structure, but is overlapped with the m3u8 download address directory;
and fourthly: the ts fragment address is the complete fragment download address.
For these four cases, the TS video clip address can be obtained by the following method
Directly acquiring the TS video segment address, or acquiring the TS video segment address after URL splicing is carried out on a TS video segment index list, wherein the specific acquisition method mainly comprises two methods:
1) first-level directory:
opening the first-level file to find out the real video address;
in the first-level file, no real video address exists, and the real video address can be found only by splicing;
2) second-level directory:
the second level address can be directly seen in the first level file;
the secondary address can not be directly seen in the primary file, and the address of the secondary file can be found only by splicing the addresses of the primary links;
opening the second-level directory to find out the real video address;
the real video address is not available, and can be found only by splicing;
in the embodiment of the present invention, S4 may specifically be:
creating an array or sequence of play task lists, storing the index address of each TS video file obtained by analysis, and storing the play task lists into application data by using any one of the following android data storage technologies: SharedPreferences storage data, file storage data, SQLite or other database storage data, ContentProvider storage data, and network storage data.
In the embodiment of the present invention, S5 specifically is: and transmitting the address of each TS video segment to a player, and acquiring a corresponding video stream file by the player according to the address to play.
the ts file is a transport stream file, the video encoding main format is h264/mpeg4, and the audio is acc/MP 3. the ts file is divided into three layers: the ts layer Transport Stream, the pes layer Packet elementary Stream, and the es layer elementary Stream, the pes layer adds the time stamp and other description information to the data frame on the audio/video data, the ts layer adds the necessary information for identifying and transmitting the data Stream on the pes layer, wherein the content of the ts layer is identified by the PID value, and the main content includes: PAT table, PMT table, audio stream, video stream. The ts stream is analyzed to find the PAT table, so long as the PAT is found, the PMT can be found, and then the audio and video stream can be found. For HLS streams, only PAT and PMT may be played. Therefore, according to the real address of the video file, the player can obtain the corresponding video stream file to play according to the address only by transmitting the address to the player, and the video file in the task list can be played on the equipment based on the Android system.
By adopting the technical scheme disclosed by the invention, the following beneficial effects are obtained: according to the method for decoding the video based on the Android system, provided by the embodiment of the invention, the M3U8 protocol is analyzed on the Android system, then the TS is unpacked, and then the h.264/aac is decoded and played on the Android system (the equipment of the Android system can play the video coded by the mp4 format h.264/aac), in the using process, an Android user downloads the M3U8 file, and the analysis and playing of the video file under the M3U8 index list are realized on the Android equipment through the index address of the M3U8 file and the specific small segment of the video under the index list, so that the cross-platform cross-equipment video on demand and live broadcast experience of streaming media are realized.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and improvements can be made without departing from the principle of the present invention, and such modifications and improvements should also be considered within the scope of the present invention.
Claims (5)
1. A method for decoding video based on an Android system is characterized by comprising the following steps:
s1, acquiring an M3U8 file;
s2, analyzing the M3U8 file to obtain a TS package file;
s3, analyzing the TS packet file, directly obtaining the address of the TS video clip, or obtaining the address of the TS video clip after URL splicing is carried out on the index list of the TS video clip;
s4, creating a play task list, and storing the address of each TS video clip in the M3U8 file;
s5, playing the TS video clips in the task list on the equipment based on the Android system according to the address of each TS video clip;
in S3, the TS video clip address is a file name, a directory structure and a clip download address overlapped or complete with the download address directory of the M3U8 file;
the method for directly obtaining the TS video segment address or obtaining the TS video segment address after URL splicing is carried out on the TS video segment index list is implemented by adopting the following method:
opening a first-level file to obtain a TS video clip address;
or
After opening the primary file, carrying out URL splicing on the TS video clip index list, and acquiring a TS video clip address;
or
Directly acquiring the address of a secondary file in the primary file, directly acquiring the address of a TS video clip in the secondary file, or splicing the address of a secondary link in the secondary file to acquire the address of the TS video clip;
or
In the first-level file, the address of the first-level link is spliced to obtain the address of the second-level file, in the second-level file, the address of the TS video clip is directly obtained, or in the second-level file, the address of the second-level link is spliced to obtain the address of the TS video clip;
s4 specifically includes:
creating an array or sequence of play task lists, storing the index address of each TS video file obtained by analysis, and storing the play task lists into application data by using any one of the following android data storage technologies: SharedPreferences storage data, file storage data, SQLite or other database storage data, ContentProvider storage data, and network storage data.
2. The Android system-based video decoding method of claim 1, wherein S1 specifically is: the file with the parsing is retrieved from a server storing the video file or from a device memory via a network transmission.
3. The Android-system-based video decoding method of claim 1, wherein in S1, if the M3U8 file is encrypted, the URL address of the key and the M3U8 index list ciphertext are obtained, the content decryption public key is obtained, and the M3U8 index list ciphertext is decrypted.
4. The Android-system-based video decoding method of claim 1, wherein S2 is specifically configured to parse an M3U8 file according to a series tag in an M3U8 file to obtain a URL address or a relative index address of a TS packet file, where the series tag includes:
# EXTM3U, located in the first row of each M3U8 file;
# EXT-X-TARGETDURATION, for specifying the maximum media segment time length, which value appears only once in the M3U8 file;
# extinn, which describes the length of a single media file, has a value less than or equal to the value specified in the # EXT-X-target destination tag, which is followed by the URL address or relative index address of the TS packet file.
5. The Android system-based video decoding method of claim 1, wherein S5 specifically is: and transmitting the address of each TS video segment to a player, and acquiring a corresponding video stream file by the player according to the address to play.
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| CN113079386B (en) * | 2021-03-19 | 2023-01-17 | 北京百度网讯科技有限公司 | Video online playing method and device, electronic equipment and storage medium |
| CN116450149B (en) * | 2023-06-16 | 2023-08-11 | 成都阿加犀智能科技有限公司 | Hardware decoding method, device and storage medium |
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