CN108174280B - Audio and video online playing method and system - Google Patents
Audio and video online playing method and system Download PDFInfo
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- CN108174280B CN108174280B CN201810047220.8A CN201810047220A CN108174280B CN 108174280 B CN108174280 B CN 108174280B CN 201810047220 A CN201810047220 A CN 201810047220A CN 108174280 B CN108174280 B CN 108174280B
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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
- H04N21/433—Content storage operation, e.g. storage operation in response to a pause request, caching operations
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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
- H04N21/433—Content storage operation, e.g. storage operation in response to a pause request, caching operations
- H04N21/4335—Housekeeping operations, e.g. prioritizing content for deletion because of storage space restrictions
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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, rendering scenes according to MPEG-4 scene graphs
- H04N21/44012—Processing of video elementary streams, e.g. splicing a video clip retrieved from local storage with an incoming video stream, rendering scenes according to MPEG-4 scene graphs involving rendering scenes according to scene graphs, e.g. MPEG-4 scene graphs
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/47—End-user applications
- H04N21/472—End-user interface for requesting content, additional data or services; End-user interface for interacting with content, e.g. for content reservation or setting reminders, for requesting event notification, for manipulating displayed content
- H04N21/47202—End-user interface for requesting content, additional data or services; End-user interface for interacting with content, e.g. for content reservation or setting reminders, for requesting event notification, for manipulating displayed content for requesting content on demand, e.g. video on demand
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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
Abstract
The invention discloses an audio and video online playing method and system, which can realize simultaneous downloading of multiple definition videos in a multi-thread mode when receiving a definition switching instruction, ensure that the current definition is normally played, complete the loading of target definition and realize the function of seamless definition switching. The phenomenon of screen blacking waiting existing in stopping the current playing and recreating the playing instance is avoided, and the watching experience of the user is improved.
Description
Technical Field
The invention relates to an online playing technology, in particular to an audio and video online playing method and system.
Background
With the blowout type growth of network video resources, the demand of people for online video watching is increasingly enhanced, however, due to the limited user bandwidth, experience and the like, one video can produce film sources with various definitions, and the watching demands of different users are met. The need for user switching clarity also arises.
In the existing switching mode, the current playing needs to be finished, the playing instance needs to be created again, and the playing is continued when the switching time point is located. This method has the following problems: the player is reestablished, which is a heavy operation and can generate phenomena such as black screen frame skipping and the like; secondly, when a situation that the newly created player fails occurs, the user waits for the result that the playing fails. The user experience of this switching method is poor.
Disclosure of Invention
The invention aims to solve the technical problem that the prior art is insufficient, and provides an audio and video online playing method and system, which can realize seamless switching definition of videos in the playing process and avoid the situations of black screen and frame skipping in the operation of recreating playing examples.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: an audio and video online playing method comprises the following steps:
1) selecting a certain definition src1 to play the video;
2) acquiring fragment information of a current definition video file, downloading the current definition video file, and rendering and playing the current definition video file;
3) triggering a switching instruction, and acquiring and transmitting target definition src2 parameter information;
4) judging whether target definition video fragment information is acquired, if so, entering the step 5); otherwise, entering step 7);
5) according to the current playing time of the trigger switching instruction, calculating the ending time of the current definition video and the starting time of the target definition video, simultaneously downloading the current definition video and the target definition video, and setting an ending identifier of the current definition video;
6) resetting the decoder according to the ending identifier, and discarding the audio and video data of the definition src2 overlapped with the definition src 1;
7) and playing the downloaded audio and video data.
In step 2), after the fragment information of the current definition video file is acquired, analyzing the fragment information of the video file, calculating the starting time and the ending time of the corresponding fragments according to the duration and the sequence of each fragment, establishing an index of time, and storing the index in a key value pair mode, wherein the index is used for positioning and inquiring the position of the fragment at which a certain time is located; in the key value pair, the key is the starting time of each fragment, and the value comprises the ending time of the fragment and the request address.
In step 3), when the device checks that the network state changes or the user triggers a switching instruction, executing the operation of triggering the switching instruction.
In step 3), the parameter information of the target definition src2 includes the address of the target definition video fragment, and triggers the current playing time of the switching instruction.
In step 5), the specific implementation process of calculating the end time of the current definition video and the start time of the target definition video includes:
1) acquiring and storing the current playing time from the switching instruction;
2) pulling the sharded index file of src1 and the sharded index file of src 2;
3) using the current playing time, inquiring the fragment index file of src1, searching for fragment i, making the current playing time be between the starting time and the ending time of fragment i, and obtaining the ending time t1 of the fragment (i.e. the ending time of the current definition video) according to the information of the fragment i; inquiring a fragment index file of src2, searching a fragment j, enabling the time t1 to be between the start time and the end time of the fragment j, and acquiring the start time t2 of the fragment j according to the information of the fragment j;
4) the target definition video start time is set to t 2.
In step 5), the specific implementation process of downloading the target definition video comprises the following steps: and downloading the video with the target definition from the sub-slice with the start time of t2 according to the target definition video downloading start time t 2.
The specific operation process for setting the current definition video end identifier comprises the following steps: if the end time of the fragment information of the current definition video file is less than or equal to t1, the data of src1 is not downloaded completely, and the downloading is continued and polling detection is performed; and if the fragment information end time of the current definition video file is greater than t1, stopping downloading, adding an end identifier at the tail of the fragment where t1 is located, finishing downloading, and deleting the fragment data downloaded after the fragment where t1 is located.
Correspondingly, the invention also provides an audio and video online playing system, which comprises:
the downloading module is used for downloading the current definition video file and performing rendering playing; triggering a switching instruction, and acquiring and transmitting target definition src2 parameter information;
the control module is used for calculating the end time of the current definition video and the start time of the target definition video according to the current playing time of the trigger switching instruction when the target definition video slicing information is obtained, downloading the current definition video and the target definition video at the same time, and setting the end identifier of the current definition video;
and the playing module is used for resetting the decoder according to the ending identifier and playing the video.
The download module comprises:
the first downloading unit is used for acquiring the fragment information of the current definition video file;
the first analysis unit is used for analyzing the fragment information of the current definition video file, calculating the starting time and the ending time of the corresponding fragments according to the duration and the sequence of each fragment, establishing an index of time, and storing the index in a key value pair mode;
a second downloading unit for downloading and caching the parameter information of the target definition src 2;
and the second analysis unit is used for calculating the starting time and the ending time of each fragment according to the time length and the sequence of the fragments in the parameter information of the target definition src2, and establishing a time index, wherein the time index is used for positioning the fragment at a certain specific time.
The playing module specifically executes the following operations:
the playing module receives the ending identifier, acquires the audio or video packet played by the src1 at last and corresponding playing time, closes the decoder, and reopens the decoder after reading the data of the second downloading unit;
the playing module detects whether the rendering time of the audio and video packet after the second downloading unit is unpacked is less than the time of the src1 playing last, if so, the audio and video packet is discarded, and the audio and video packet is continuously read and is subjected to polling check; if the number of the video data packets is larger than the preset number, the packet loss logic is completed, the video data content is continuous and has no repeated part, and the logic for detecting and judging the packet loss is quitted.
In the invention, the video file is a pure audio file and a file formed by packaging the pure video file in a certain format.
Compared with the prior art, the invention has the beneficial effects that: the invention realizes the seamless switching definition of the video in the playing process, avoids the conditions of black screen and frame skipping in the operation of recreating the playing example and enhances the watching experience of the user.
Drawings
FIG. 1 is a flow chart of an example method of the present invention;
FIG. 2 is a flowchart of the file parsing module operation of the present invention;
FIG. 3 is a control module workflow diagram of the present invention;
FIG. 4 is a flow chart of the operation of the online playback device of the present invention;
FIG. 5 is a schematic diagram of a download module according to an embodiment of the present invention;
fig. 6 is a flow chart of the play module operation of the present invention.
Detailed Description
The method of the invention is shown in figure 1, and specifically comprises the following steps:
in step 101, a user clicks and plays a video on the terminal equipment, and the definition is selected (src 1).
In this embodiment, the terminal device may be a mobile phone, a tablet computer, or a wearable device.
Specifically, the download module creates a download unit 1; file fragment information of src1 is downloaded first, where the file fragment information is composed of multiple independent fragments, and each fragment includes a playing time length and a request address. And starting a file analysis module after the downloading is finished. As shown in fig. 2.
201 obtains the sliced data from the download module,
202, the fragment data is analyzed, the start time and the end time of the corresponding fragment are calculated according to the time length and the sequence of each fragment, and a time index is established, wherein the time index is used for positioning the fragment of a certain specific time.
The index file information is stored 203 in the form of key value pairs, the key being the start time of each slice and the value containing the end time of the slice, the request address and other information.
Specifically, the equipment checks that according to the current network speed, when the network speed can meet smooth playing with higher definition or playing with serious pause and incapability of meeting the current definition can provide an automatic switching function.
The user triggers the instruction, mainly according to the user behavior.
Specifically, the src2 parameter includes a file fragment address, and triggers the current playing time of the switching instruction. These parameters are passed to the control module.
In step 105, after the src2 parameter and the switching instruction are acquired, file information of the src2 is requested.
Specifically, the download module will create a new download unit 2 for downloading and caching relevant data of src 2; and downloading the file fragment information of the src2, wherein the file fragment information is composed of a plurality of independent fragments, and each fragment comprises a playing time length and a request address. And after downloading is finished, starting a file analysis module, calculating the starting time and the ending time of each fragment according to the time length and the sequence of the fragments, and establishing a time index for positioning the fragment at a certain specific time.
If the download file fragment fails, indicating that the switch fails, step 109 is executed to continue playing src 1.
And step 106, calculating the end time of the current definition video and the start time of the target definition video according to the current playing time of the transmitted switching instruction.
In particular, as shown in figure 3,
301, obtaining the current playing time from the input switching instruction, and storing the current playing time;
302, pulling the sharding index of src1 and the sharding index file of src 2;
303, querying the segment index of src1 by using the current playing time, finding that the playing time is in the segment interval of the segment in the segment index, and obtaining the ending time t1 of the segment according to the information of the segment;
304, querying the fragment index file of src2, finding that time t1 is within the fragment interval in the fragment index, and obtaining start time t2 of the fragment according to the information of the fragment;
305, the target definition video download start time is set to t 2.
And step 107, downloading the fragment files of src1 and src2, and setting an end identifier.
Specifically, the end time of the current downloading segment of the downloading unit 1 created in step 102 is obtained, and it is detected whether the end time of the current segment is greater than t 1.
If the current fragment ending time is less than or equal to t1, the data of src1 is not downloaded completely, the downloading is continued, and polling is performed to detect whether the current fragment ending time is greater than t 1; and if the current fragment ending time is greater than t1, stopping downloading by the downloading unit 1, adding an ending identifier at the tail of the fragment where t1 is located, finishing downloading the data of the downloading unit 1, and deleting the fragment data downloaded after the fragment where t1 is located.
Specifically, after acquiring the download start time t2 of src2, step 106 notifies the download module to start loading the fragment data of src2 from the fragment where t2 is located. The download unit 2 created using step 105 in turn downloads a single shard from the shard index of src 2.
In step 108, the decoder is reset according to the end flag, and the data overlapped by src1 and src2 is discarded.
Specifically, the downloading module reads the video file from the downloading unit 1, reads the fragment tail containing the end mark, and notifies the end mark to the playing module; switching to the downloading unit 2 to continue reading the video file.
Specifically, the playing module receives the end identifier, acquires the audio or video packet played last by src1, acquires the time corresponding to the end, closes the decoder, and reopens the decoder after reading the data of download unit 2.
Specifically, the audio and video data of the downloading unit 2 are read, and whether the rendering time of the audio and video packet after the downloading unit 2 is unpacked is smaller than the time of the src1 playing last is detected. If the data packet is smaller than the preset threshold value, the data packet is discarded, and the data packet is continuously read and is subjected to polling check. If the number of the video data packets is larger than the preset number, the packet loss logic is completed, the video data content is continuous and has no repeated part, and the logic for detecting and judging the packet loss is quitted.
And step 109, playing the read audio and video data.
According to the online playing method provided by the embodiment of the invention, when the definition switching instruction is received, the simultaneous downloading of multiple definition videos is realized in a multi-thread mode, the loading of the target definition is also finished when the current definition is played normally, and the function of seamless definition switching is realized. The phenomenon of screen blacking waiting existing in stopping the current playing and recreating the playing instance is avoided, and the watching experience of the user is improved.
An embodiment of the present invention further provides an online playing device, as shown in fig. 4, specifically including: the device comprises a downloading module, a file analyzing module, a control module and a playing module.
And the downloading module is used for downloading the fragment files and the video files of the video. The download module supports multi-task downloading, and as shown in fig. 5, may include a plurality of download units for downloading respectively.
The cache unit 501 includes a cache space for storing the video data downloaded by the first unit;
and a cache control module 504, configured to control reading of the cache unit, when the first cache unit completes setting of the end flag, the cache control module determines whether the second cache unit 502 exists, if the second cache unit 502 exists, the cache control module switches to the second cache unit, and if the cache unit exists, the cache related content all belong to the second cache unit 502, the control is repeated until the cache unit does not exist, the cache control module sets the end flag, and the download module completes downloading of all files.
And the file analysis module is used for analyzing and storing the video file segmentation information so as to inquire and locate the segmentation information and the address.
And the control module is used for controlling the loading ending time of the current target definition, setting an ending mark and setting the starting segment of target definition loading.
And the playing module is used for playing the video file, resetting the decoder information, and discarding the data with overlapped time according to the playing time of each frame of picture obtained by de-encapsulation.
As shown in figure 6 of the drawings,
the playing module 601 plays the unpackaged audio and video;
the playing module 602, when meeting the ending identifier during playing, resets the current decoder information, continues to read the audio/video packet, and restarts the decoder according to the new audio/video packet;
the playing module 603 discards the audio/video packet with the target definition overlapping with the current definition according to the step 108
And the playing module 604 continues to play the unpackaged audio and video.
Claims (9)
1. An audio and video online playing method is characterized by comprising the following steps:
1) selecting a certain definition src1 to play the video;
2) acquiring fragment information of a current definition video file, downloading the current definition video file, and rendering and playing the current definition video file;
3) triggering a switching instruction, and acquiring and transmitting target definition src2 parameter information;
4) judging whether target definition video fragment information is acquired, if so, entering the step 5); otherwise, entering step 7);
5) according to the current playing time of the trigger switching instruction, calculating the ending time of the current definition video and the starting time of the target definition video, simultaneously downloading the current definition video and the target definition video, and setting an ending identifier of the current definition video;
the specific implementation process of calculating the end time of the current definition video and the start time of the target definition video comprises the following steps:
a) acquiring and storing the current playing time from the switching instruction;
b) pulling the sharded index file of src1 and the sharded index file of src 2;
c) using the current playing time, inquiring the fragment index file of src1, searching for fragment i, making the current playing time be between the starting time and the ending time of fragment i, and obtaining the ending time t1 of the fragment according to the information of the fragment i; inquiring a fragment index file of src2, searching a fragment j, enabling the time t1 to be between the start time and the end time of the fragment j, and acquiring the start time t2 of the fragment j according to the information of the fragment j;
d) setting a target definition video start time to t 2;
6) resetting the decoder according to the ending identifier, and discarding the audio and video data of the definition src2 overlapped with the definition src 1;
7) and playing the downloaded audio and video data.
2. The audio/video online playing method according to claim 1, wherein in step 2), after the fragment information of the current definition video file is obtained, the fragment information of the video file is analyzed, the start time and the end time of the corresponding fragment are calculated according to the duration and the sequence of each fragment, and an index of time is established, the index is stored in a key value pair form, and the index is used for positioning and inquiring the position of the fragment at which a certain time is located; in the key value pair, the key is the starting time of each fragment, and the value comprises the ending time of the fragment and the request address.
3. The method for playing audio and video on line according to claim 1, wherein in step 3), when the device checks that the network status changes or the user triggers the switching instruction, the device executes the operation of triggering the switching instruction.
4. The method for playing audio/video on line according to claim 1, wherein in step 3), the parameter information of the target definition src2 includes a target definition video segment address and a current playing time for triggering a switching instruction.
5. The method for playing audio/video on line according to claim 1, wherein in the step 5), the specific implementation process of downloading the target definition video comprises:
and downloading the video with the target definition from the sub-slice with the start time of t2 according to the target definition video downloading start time t 2.
6. The method for playing audio/video on line according to claim 5, wherein the specific operation process for setting the current definition video end identifier comprises:
if the end time of the fragment information of the current definition video file is less than or equal to t1, the data of src1 is not downloaded completely, and the downloading is continued and polling detection is performed;
and if the fragment information end time of the current definition video file is greater than t1, stopping downloading, adding an end identifier at the tail of the fragment where t1 is located, finishing downloading, and deleting the fragment data downloaded after the fragment where t1 is located.
7. An audio and video online playing system is characterized by comprising:
the downloading module is used for downloading the current definition video file and performing rendering playing; triggering a switching instruction, and acquiring and transmitting target definition src2 parameter information;
the control module is used for calculating the end time of the current definition video and the start time of the target definition video according to the current playing time of the trigger switching instruction when the target definition video slicing information is obtained, downloading the current definition video and the target definition video at the same time, and setting the end identifier of the current definition video; the specific implementation process of calculating the end time of the current definition video and the start time of the target definition video comprises the following steps: acquiring and storing the current playing time from the switching instruction; pulling the sharded index file of src1 and the sharded index file of src 2; using the current playing time, inquiring the fragment index file of src1, searching for fragment i, making the current playing time be between the starting time and the ending time of fragment i, and obtaining the ending time t1 of the fragment according to the information of the fragment i; inquiring a fragment index file of src2, searching a fragment j, enabling the time t1 to be between the start time and the end time of the fragment j, and acquiring the start time t2 of the fragment j according to the information of the fragment j; setting a target definition video start time to t 2; and the playing module is used for resetting the decoder according to the ending identifier and playing the video.
8. The system of claim 7, wherein the download module comprises:
the first downloading unit is used for acquiring the fragment information of the current definition video file;
the first analysis unit is used for analyzing the fragment information of the current definition video file, calculating the starting time and the ending time of the corresponding fragments according to the duration and the sequence of each fragment, establishing an index of time, and storing the index in a key value pair mode;
a second downloading unit for downloading and caching the parameter information of the target definition src 2;
and the second analysis unit is used for calculating the starting time and the ending time of each fragment according to the time length and the sequence of the fragments in the parameter information of the target definition src2, and establishing a time index, wherein the time index is used for positioning the fragment at a certain specific time.
9. The system of claim 8, wherein the play module specifically performs the following operations:
the playing module receives the ending identifier, acquires the audio or video packet played by the src1 at last and corresponding playing time, closes the decoder, and reopens the decoder after reading the data of the second downloading unit;
the playing module detects whether the rendering time of the audio and video packet after the second downloading unit is unpacked is less than the time of the src1 playing last, if so, the audio and video packet is discarded, and the audio and video packet is continuously read and is subjected to polling check; if the number of the video data packets is larger than the preset number, the packet loss logic is completed, the video data content is continuous and has no repeated part, and the logic for detecting and judging the packet loss is quitted.
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| CN108848414A (en) * | 2018-06-26 | 2018-11-20 | 曜宇航空科技（上海）有限公司 | The switching method and player of a kind of playback method of video, clarity |
| CN109144613B (en) * | 2018-09-03 | 2021-10-15 | 武汉斗鱼网络科技有限公司 | Android definition switching method and device, terminal and readable medium |
| CN109246462B (en) * | 2018-10-11 | 2021-08-06 | 苏宁易购集团股份有限公司 | Seamless switching method and device for video stream |
| CN109168039A (en) * | 2018-10-22 | 2019-01-08 | 武汉斗鱼网络科技有限公司 | Code stream clarity switching method, device, terminal and the readable medium of android system |
| CN109600626A (en) * | 2018-12-24 | 2019-04-09 | 北京奇艺世纪科技有限公司 | A kind of method for processing video frequency and relevant device |
| CN112632321A (en) * | 2019-09-23 | 2021-04-09 | 北京国双科技有限公司 | Audio file processing method and device and audio file playing method and device |
| CN112379768B (en) * | 2020-11-12 | 2021-05-18 | 北京中电兴发科技有限公司 | Power consumption reduction method applied to embedded cloud storage system |
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| CN105657520A (en) * | 2014-11-18 | 2016-06-08 | 乐视网信息技术（北京）股份有限公司 | Video definition switching method and video player |
| CN106131610A (en) * | 2016-06-28 | 2016-11-16 | 乐视控股（北京）有限公司 | The online broadcasting method of video, equipment and device |
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