CN104202655A - Method and device of downloading audio and video files - Google Patents
Method and device of downloading audio and video files Download PDFInfo
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- 239000000872 buffer Substances 0.000 description 7
- 238000004458 analytical method Methods 0.000 description 2
- 241001413866 Diaphone Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
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Abstract
The invention discloses a method and a device of downloading audio and video files. The method comprises the following steps of analyzing an audio and video playing list, wherein the analyzed audio and video playing list comprises a download link of a local area network and/or a wide area network of audio and video files; and if the audio and video files in the analyzed audio and video playing list exist in a local area network server, downloading the audio and video files from the local area network server, otherwise, downloading the audio and video files according to the download link of the audio and video files. According to the method and the device, the audio and video download and broadcast speed can be dynamically accelerated.
Description
Technical field
The present invention relates to technical field of the computer network, relate in particular to a kind of audio-video document method for down loading and device.
Background technology
The use that can play the portable audio video data player of digitally coded audio, video data has become very general, as mobile phone, ipad etc.Along with the demand of the increase of the larger data memory capacity in portable audio video data player, the problem of the lack of memory capacity of small hand held devices is more and more outstanding.
The audio-video document index of multimedia play list for providing one to point to other positions, what in fact use multimedia play list playing audio-video was opened is the audio-video document by other positions pointed in multimedia play list.Multimedia play list can be the file of plain text format, wherein needs the attribute of storing multimedia as title, size, playing duration and download address etc.
Most audio, video data documentors can be set up and edit of multimedia playlist user, and described playlist can be downloaded to portable audio video data player the Selective sequence for playing audio-video data file subsequently.M3U is a kind of typical multimedia play list, it can be used for the online broadcasting of mobile phone, computer etc., user first downloads M3U playlist local storage, because M3U playlist is plain text format, therefore take up room very little, be highly suitable for as used on the miniaturized electronicss such as mobile phone.When user selects to play the file in M3U playlist, find after corresponding audio-video document and play online according to respective downloaded address wherein.
The broadcast mode of current common M3U playlist is, client is downloaded a M3u list from remote request, as M3U8 list, then according to its coded format UFT-8, it is resolved, obtain the network address corresponding to each multimedia file in playlist, and downloading multimedia file, play online one by one from the described network address.
But when client is in Intranet or from server when the network segment close to, because the network address of the play list file parsing is present in far-end, or network environment is not reciprocity, as client is used telecommunications broadband network, and multimedia file place server end is while being UNICOM or other carrier networks, can cause and download slowly, audio frequency and video are play situation about having some setbacks.
Summary of the invention
Technical problem to be solved by this invention is: in the time using multimedia play list playing audio-video document, how can download rapidly and smooth playing audio-video frequency content.
For this reason, according to an aspect of the present invention, it has proposed a kind of audio-video document method for down loading, and it comprises:
Resolve audio frequency and video playlist, the described audio frequency and video playlist after parsing comprises local area network (LAN) and/or the wide area network download address of audio-video document;
If the audio-video document after resolving in audio frequency and video playlist is present in LAN server, downloads described audio-video document from LAN server, otherwise download according to the download address of described audio-video document.
Alternatively, if the audio-video document in audio frequency and video playlist is present in LAN server after resolving, the download address of the audio-video document returning according to LAN server is upgraded the audio-video document playlist after described parsing.
Alternatively, the part audio-video document in described audio frequency and video playlist is stored in LAN server and wide area network server simultaneously.
Alternatively, described LAN server is often downloaded audio-video document to wide area network server request at regular intervals.
Alternatively, in described LAN server, store described part audio-video document with the bibliographic structure same with wide area network server.
Alternatively, ask the audio frequency and video playlist in certain hour section from LAN server and wide area network server simultaneously;
The wide area network audio frequency and video playlist that the local area network (LAN) audio frequency and video playlist that parsing LAN server is returned and wide area network server are returned;
Merge local area network (LAN) audio frequency and video playlist and wide area network audio frequency and video playlist after resolving.
Alternatively, the audio-video document after resolving if described in audio frequency and video playlist is present in LAN server, before LAN server is downloaded described audio-video document, also comprises:
Judge whether described audio frequency and video playlist is the audio frequency and video playlist after local area network (LAN) audio frequency and video playlist and wide area network audio frequency and video playlist merge, if directly use the total download address of audio frequency and video playlist to download.
Alternatively, from LAN server failed download, automatically switch to wide area network server and download.
Alternatively, if wide area network speed of download, higher than local area network (LAN) speed of download, is directly downloaded audio-video document from wide area network server.
According to a further aspect of the invention, it has also proposed a kind of audio-video document download apparatus, and it comprises:
Parsing module, resolves audio frequency and video playlist, and the described audio frequency and video playlist after parsing comprises local area network (LAN) and/or the wide area network download address of audio-video document;
Download module, if the audio-video document in audio frequency and video playlist is present in LAN server after resolving, downloads described audio-video document from LAN server, otherwise downloads according to the download address of described audio-video document.
The such scheme that the present invention proposes is applied to internet video and plays and download technology field.The present invention can be by different audio frequency and video playlists, as different video flowings is switched in different m3u8 lists, arrive different servers by the audio-video document first backing up in m3u8 playlist, thereby the audio-video document source address that replacement parsing m3u8 playlist obtains reaches the object of accelerating to download audio-video document, and the present invention can dynamically accelerate audio frequency and video and download and broadcast speed.
Brief description of the drawings
Fig. 1 is the flow chart of audio-video document method for down loading in the present invention;
Fig. 2 is the structured flowchart of audio-video document download apparatus in the present invention.
Embodiment
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with specific embodiment, and with reference to accompanying drawing, the present invention is described in further detail.
Fig. 1 shows a kind of audio/video method for down loading flow chart that the present invention proposes.As shown in Figure 1, the method comprises:
Step 101: resolve audio/video playlist;
Step 102: search the local audio/video file of resolving in the audio/video playlist obtaining that whether stores, if this locality stores described audio/video file, directly obtain described audio/video from this locality;
Step 103: if described audio-video document is not stored in this locality, search in LAN server whether store described audio/video file, if LAN server stores described audio/video file, download described audio/video file from LAN server;
Step 104: if LAN server is not stored described audio/video file, the download address of the described audio frequency and video playlist obtaining according to parsing, downloads described audio/video file from wide area network server correspondingly.
Each step in the audio frequency and video method for down loading proposing according to concrete enforcement means detailed description the present invention below.It will be appreciated by those skilled in the art that described concrete enforcement means are only for illustrating technical scheme of the present invention, but not restriction to its scope, these concrete enforcement means can also adopt other means that realize said function to replace.
For step 101, described audio/video playlist generally includes audio-video document attribute and download address, specifically comprise: the download address of audio-video document, the title of audio-video document, singer, performer and/or director etc. that audio-video document relates to, the broadcasting absolute time of audio-video document, the playing duration of audio-video document etc.The playlist of different-format need to adopt different analytic methods, and the object of parsing is broadcast address and the audio-video document attribute etc. obtaining in audio frequency and video playlist, in order to download audio-video document in described playlist.More common audio/video playlist comprises m3u8 audio/video playlist at present, its analytic method can adopt the form of agreement, as #EXTINF:10, described playlist is cut apart, and parsing obtains corresponding content, as audio frequency and video download address, audio frequency and video are play absolute time, audio frequency and video playing duration etc.
Described audio frequency and video playlist can be audio/video server as after LAN server and/or wide area network server generate and issue, obtain and store by client, also the audio frequency and video playlist that can be user set up according to the hobby of oneself can also be the audio frequency and video playlist obtaining from LAN server and/or wide area network server request.When client is during to LAN server and/or wide area network server request audio frequency and video playlist, LAN server and/or wide area network server generate audio frequency and video playlist according to the attribute information of audio-video document of storage on it and the address of storage, and send it to client.
User can be simultaneously to LAN server and wide area network server request audio frequency and video playlist, and resolving after two audio frequency and video playlists of being asked, both is merged.In the time merging, if the existing local area network (LAN) download address of same audio-video document also has wide area network download address, its download address is updated to local area network (LAN) download address.
For step 102, obtained after the audio-video document attribute information that need to play resolving audio frequency and video playlists, according to the attribute information of described audio-video document as audio-video document title, singer, performer and/or director etc. search in local storage, whether be cached with as described in audio-video document.
This step is mainly in order to prevent repeated downloads, as client download or playing process in beyond when restarting or suspension occurring, likely existence has been downloaded successful file record and has not been downloaded etc.; Situation about also likely occurring is that user plays the audio-video document in same list repeatedly, when this audio-video document last time having cushioned while broadcasting is still stored in this locality, without again downloading.Therefore, cause the wasting of resources in order to prevent repeated downloads, client download first check when audio-video document local side whether buffer-stored have the current audio-video document that will download, if existed, just can play-over the audio-video document of local client buffer memory, and without again downloading.
In this step, if find audio-video document on local storage, audio-video document download address corresponding in audio frequency and video playlist is revised as to local memory address.
For step 103, if do not store the current audio-video document that will play in resolved audio frequency and video playlist in local storage, search in LAN server, whether to store described audio-video document.If store the current audio-video document that will play in LAN server, directly download described audio frequency and video from LAN server, and after download completes, downloaded audio-video frequency content is stored in local storage, start to play.
In this step, if client at local search less than the audio-video document in playlist, the first download address to audio-video document described in LAN server request, if the storage audio-video document of request to some extent in LAN server, the download address of asked audio-video document is returned to client by LAN server, and client can be downloaded described audio-video document from LAN server according to described download address.
Before this step, said method of the present invention also comprises and first judges that whether the download address of described audio-video document has been local area network (LAN) download address, if it is not to the download address of this audio-video document of LAN server request, but directly use the download address of audio-video document in audio frequency and video playlist to download and play.
In the technical scheme that the present invention proposes, adopted double buffers to store audio-video document, a part of audio-video document had both been stored in wide area network server, was also stored in LAN server.Described double buffers specifically describes as follows:
The a large amount of audio-video documents of permanent storage in wide area network storage server, described wide area network storage server is exactly the storage server of downloading at present audio-video document, and the audio-video document download address of storing the audio frequency and video playlist obtaining from network is often referred to wide area network storage server.In prior art, obtain pointing in parsing after the download address of wide area network storage server, download audio-video document from described download address, but this downloading mode may cause speed of download slow, causes broadcasting not smooth, causes user to experience not good.
Based on this, the present invention proposes a kind of double buffers of storing audio-video document.Except storing audio-video document, also back up described audio-video document in local area network on wide area network storage server.Alternatively, in local area network, dispose a station server, audio-video document every from the scheduled time to wide area network storage server requests permanent storage on it, the described server that wide area network storage server receives in the backward local area network (LAN) of described request returns to an audio frequency and video playlist, as m3u8 video play lists, LAN server is resolved described m3u8 video play lists, and according to resolving the download address obtaining, video file corresponding in described m3u8 video play lists is downloaded in multithreading segmentation, downloaded audio-video document is stored in LAN server, identical with in wide area network server of the bibliographic structure of storage.The m3u8 video play lists that LAN server also provides according to wide area network server, deposits in the database such as the memory address of the video file of download, filename, video time, downloads for subsequent client.
Alternatively, the audio-video document that local area network server can the most often be play from wide area network server request download client as required, as the audio-video document title of local area network server record client-requested download, the every request of client once and while there is not downloaded audio-video document in LAN server, the download time increase of corresponding audio-video document once.LAN server only exceedes the audio-video document of predetermined threshold at every turn to wide area network server request download time.Alternatively, LAN server also can be downloaded audio-video document not according to predetermined time interval request, but exceedes after some at the audio-video document that download time exceedes predetermined threshold, then downloads described audio-video document to wide area network server request.
When client parses after current audio frequency and video playlist, be also buffer memory audio-video document if local, first file a request to LAN server as title etc. according to the audio-video document attribute in audio frequency and video playlist, the audio-video document that in LAN server, if buffer memory is asked to some extent, by asked audio-video document, by audio-video document, the download address in LAN server sends to client to LAN server, client is used received local area network (LAN) download address to replace the download address of corresponding audio-video document in the audio frequency and video playlist after resolving, client is downloaded described audio-video document according to described download address from LAN server.Alternatively, the audio-video document that LAN server also can directly be asked client sends to client.
For step 104, if also do not store the current audio-video document that will play in LAN server, directly download described audio-video document from wide area network storage server.
In such scheme, client can be by directly downloading described audio-video document after the download address of such scheme audio-video document of every acquisition in playing process, for example, during by playing audio-video document A, if audio-video document A is stored in this locality, directly playing this audio-video document A from local storage plays, if the audio-video document B that is about to play does not store in this locality, but in LAN server, there is storage, the address of returning from LAN server is downloaded described audio-video document B or is directly received described audio-video document B from LAN server, and play, if the audio-video document C that is about to play be not both stored in this locality, be not stored in LAN server yet, directly download described audio-video document C and play from wide area network server according to the download address in audio frequency and video playlist.
Client can also first travel through the audio frequency and video playlist after resolving for a time, after download address information in audio frequency and video playlist after resolving as described in this locality, LAN server and wide area network server renewal according to audio-video document position, in playing, directly download also playing audio-video document according to the audio frequency and video playlist after upgrading.For example, audio-video document A has buffer memory in this locality, the download address of diaphone video file A in described audio frequency and video playlist is updated to local memory address, audio-video document B is not stored in this locality, but in LAN server, there is backup, by it, the download address in audio frequency and video playlist is updated to the memory address of the storage in LAN server, if audio-video document C be not both stored in this locality, be not stored in LAN server, keep its download address constant yet.After complete audio frequency and video playlist of traversal, the audio-video document in described audio frequency and video playlist is downloaded and play to client according to the audio frequency and video playlist after upgrading in playing process.
Alternatively, in the such scheme that the present invention proposes, if when client wants obtains the audio-video document in nearest a period of time, can be by directly ask interior during this period of time audio frequency and video playlist to complete to LAN server and wide area network server simultaneously.And obtain after two audio frequency and video playlists in request, both are compared, if identical, directly using the audio frequency and video playlist obtaining from LAN server to download audio-video document from local area network (LAN) plays, if both are different, both are merged, be present in wide area network audio frequency and video playlist, and non-existent audio-video document information is added into described local area network (LAN) audio frequency and video playlist in local area network (LAN) audio frequency and video playlist, and download and playing audio-video document according to the audio frequency and video playlist after merging.
Below by a concrete example, said method of the present invention is illustrated, specifically illustrates as an example of m3u8 audio frequency and video playlist example.Client is to LAN server and wide area network server request m3u8 audio frequency and video playlist, and client can be asked audio frequency and video playlist on a time period, as: ask 10: 03: 20, to the video of 10: 14: 20.Client can first be accessed the server in local area network (LAN), the audio-video document newly increasing in request during this period of time, for example: http://localAreaNetwork.com/approve/vod starttime=1376415344 & endtime=1376415393, LAN server is according to the request of client, in during this period of time, increase the attribute information of audio-video document and the address of storage newly, according to returning to client after the corresponding m3u8 playlist of the generation protocol generation of m3u8 list; Client is again to the audio frequency and video playlist in the same time period of wide area network server request afterwards, and wide area network server address is as follows:
http:// internet.com/approve/vod starttime=1376415344 & endtime=1376415393.Similarly, the m3u8 playlist of generation is returned to client by wide area network server, and in the time that the quantity of returning in two lists is consistent, client is just directly used the m3u8 playlist that LAN server is returned download audio frequency and video and play.If it is different to return to list of videos, client can compare the play time of each video, and the list address lacking in LAN server is added, directly downloads the audio-video document on wide area network director server.
For example, the m3u8 playlist that LAN server is returned is as follows:
#EXTM3U
#EXT-X-TARGETDURATION:10
#EXT-X-MEDIA-SEQUENCE:19426771
#EXTINF:10,
http://localAreaNetwork.com/2014_0206_100320.ts
#EXTINF:10
http://localAreaNetwork.com/2014_0206_100340.ts
The m3u8 playlist that wide area network server is returned is as follows:
#EXTM3U
#EXT-X-TARGETDURATION:10
#EXT-X-MEDIA-SEQUENCE:19426771
#EXTINF:10,
http://intertnet.com/2014_0206_100320.ts
#EXTINF:10
http://internet.com/2014_0206_100330.ts
#EXTINF:10
http://internet.com/2014_0206_100340.ts
After client comparison, quantity is inconsistent, comparison time afterwards, find on director server many one 10: 03: 30, client merges both, the m3u8 playlist after merging is as follows:
#EXTM3U
#EXT-X-TARGETDURATION:10
#EXT-X-MEDIA-SEQUENCE:19426771
#EXTINF:10,
http://intertnet.com/2014_0206_100320.ts
#EXTINF:10
http://localAreaNetwork.com/2014_0206_100330.ts
#EXTINF:10
http://internet.com/2014_0206_100340.ts
Client is resolved to after download address, goes to download according to the address after merging.At this moment client can first inspect under local directory whether have video of the same name, if had, is just considered as cushioning, and skips, and buffering is next.The audio-video document of downloading is stored in local storage, and plays after download completes.
Alternatively, described audio frequency and video playlist is in upgrading, and the wide area network address of audio-video document still retains, and, from LAN server is downloaded required audio-video frequency content failure, is automatically switched to wide area network server and downloads with convenient client.
Alternatively, in the present invention when client is downloaded when audio-video document from LAN server, analyze the speed of download of wide area network, if the speed of download of wide area network is faster than local area network (LAN) speed of download, download required audio-video frequency content when download required audio-video frequency content from LAN server faster from wide area network server, be directly switch into wide area network server and download.
Fig. 2 shows a kind of audio/video download apparatus structural representation that the present invention proposes.As shown in Figure 2, this device comprises:
Parsing module 201: for resolving audio/video playlist;
Local download module 202: for searching the local audio/video of resolving the audio/video list obtaining that whether stores, if there is this module directly to play described audio/video from this locality;
Local area network (LAN) download module 203: if described audio/video is not stored in this locality, search in LAN server whether store described audio/video, exist this module to download described audio/video from LAN server, and play;
Wide area network download module 204: if LAN server is not stored described audio/video, this module is downloaded described audio/video from wide area network server, and plays.
Because described device embodiment is substantially corresponding to the embodiment of the method shown in earlier figures 1, therefore not detailed part in the description of the present embodiment can, referring to the related description in previous embodiment, just not repeat at this.
Above-described specific embodiment; object of the present invention, technical scheme and beneficial effect are further described; be understood that; the foregoing is only specific embodiments of the invention; be not limited to the present invention; within the spirit and principles in the present invention all, any amendment of making, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. an audio-video document method for down loading, it comprises:
Resolve audio frequency and video playlist, the described audio frequency and video playlist after parsing comprises local area network (LAN) and/or the wide area network download address of audio-video document;
If the audio-video document after resolving in audio frequency and video playlist is present in LAN server, downloads described audio-video document from LAN server, otherwise download according to the download address of described audio-video document.
2. the method for claim 1, wherein:
If the audio-video document after resolving in audio frequency and video playlist is present in LAN server, the download address of the audio-video document returning according to LAN server is upgraded the audio-video document playlist after described parsing.
3. the method for claim 1, wherein:
Part audio-video document in described audio frequency and video playlist is stored in LAN server and wide area network server simultaneously.
4. method as claimed in claim 3, wherein, described LAN server is often downloaded audio-video document to wide area network server request at regular intervals.
5. the method as described in claim 3 or 4, wherein, stores described part audio-video document with the bibliographic structure same with wide area network server in described LAN server.
6. the method as described in claim 3 or 4, it also comprises:
Ask the audio frequency and video playlist in certain hour section from LAN server and wide area network server simultaneously;
The wide area network audio frequency and video playlist that the local area network (LAN) audio frequency and video playlist that parsing LAN server is returned and wide area network server are returned;
Merge local area network (LAN) audio frequency and video playlist and wide area network audio frequency and video playlist after resolving.
7. method as claimed in claim 6, wherein, the audio-video document after resolving if described in audio frequency and video playlist is present in LAN server, before LAN server is downloaded described audio-video document, also comprises:
Judge whether described audio frequency and video playlist is the audio frequency and video playlist after local area network (LAN) audio frequency and video playlist and wide area network audio frequency and video playlist merge, if directly use the total download address of audio frequency and video playlist to download.
8. the method as described in claim 1-4,7 any one, it also comprises:
From LAN server failed download, automatically switch to wide area network server and download.
9. the method as described in claim 1-4,7 any one, it also comprises:
If wide area network speed of download, higher than local area network (LAN) speed of download, is directly downloaded audio-video document from wide area network server.
10. an audio-video document download apparatus, it comprises:
Parsing module, resolves audio frequency and video playlist, and the described audio frequency and video playlist after parsing comprises local area network (LAN) and/or the wide area network download address of audio-video document;
Download module, if the audio-video document in audio frequency and video playlist is present in LAN server after resolving, downloads described audio-video document from LAN server, otherwise downloads according to the download address of described audio-video document.
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