NZ623572B2 - Mobile multimedia real-time transcoding system, device, storage medium and method - Google Patents
Mobile multimedia real-time transcoding system, device, storage medium and method Download PDFInfo
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- NZ623572B2 NZ623572B2 NZ623572A NZ62357212A NZ623572B2 NZ 623572 B2 NZ623572 B2 NZ 623572B2 NZ 623572 A NZ623572 A NZ 623572A NZ 62357212 A NZ62357212 A NZ 62357212A NZ 623572 B2 NZ623572 B2 NZ 623572B2
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/90—Details of database functions independent of the retrieved data types
- G06F16/95—Retrieval from the web
- G06F16/957—Browsing optimisation, e.g. caching or content distillation
- G06F16/9577—Optimising the visualization of content, e.g. distillation of HTML documents
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- H04L65/601—
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- H04L65/607—
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- H04L67/2823—
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
- H04N19/134—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or criterion affecting or controlling the adaptive coding
- H04N19/162—User input
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/10—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding
- H04N19/134—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using adaptive coding characterised by the element, parameter or criterion affecting or controlling the adaptive coding
- H04N19/164—Feedback from the receiver or from the transmission channel
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/40—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using video transcoding, i.e. partial or full decoding of a coded input stream followed by re-encoding of the decoded output stream
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
- H04N19/42—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals characterised by implementation details or hardware specially adapted for video compression or decompression, e.g. dedicated software implementation
- H04N19/436—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals characterised by implementation details or hardware specially adapted for video compression or decompression, e.g. dedicated software implementation using parallelised computational arrangements
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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
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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
Abstract
Disclosed is a mobile multimedia real-time transcoding playing system based on offline downloading. The system comprises a client, a task scheduling and managing server, an offline downloading and transcoding server cluster and a storage server. The client is adapted to submit an offline downloading and transcoding task request to the task scheduling and managing server. The offline downloading and transcoding task request comprises a target mobile device type selected by a user and a target format designated by the user and obtain a requested multimedia resource. The task scheduling and managing server is adapted to transmit an offline downloading and transcoding task request of a client, and schedule the distributed offline downloading and transcoding server cluster. The offline downloading and transcoding server cluster is distributed and is adapted to accept scheduling of the task scheduling and managing server, perform an offline downloading and transcoding task in a manner of performing offline downloading and transcoding in parallel according to a target mobile device type selected by the user or a target format designated by the user. The storage server is adapted to store a multimedia resource which is downloaded and transcoded by the offline downloading and transcoding server cluster. The offline downloading and transcoding server cluster is further adapted to report basic configuration information and load information of the offline downloading and transcoding server cluster to the task scheduling and managing server. The task scheduling and managing server is further adapted to allocate the offline scheduling and transcoding task to the offline downloading and transcoding server cluster according to the basic configuration information and the load information submitted by the offline downloading and transcoding server cluster. The multimedia resource comprises data slices. The offline downloading and transcoding server cluster is further adapted to receive an offset of a designated slice submitted by the client when the client needs to designate another slice which belongs to a same file with a current slice being played or previewed, perform the offline downloading and transcoding task from the designated slice according to the offset of the slice. and transcoding task request to the task scheduling and managing server. The offline downloading and transcoding task request comprises a target mobile device type selected by a user and a target format designated by the user and obtain a requested multimedia resource. The task scheduling and managing server is adapted to transmit an offline downloading and transcoding task request of a client, and schedule the distributed offline downloading and transcoding server cluster. The offline downloading and transcoding server cluster is distributed and is adapted to accept scheduling of the task scheduling and managing server, perform an offline downloading and transcoding task in a manner of performing offline downloading and transcoding in parallel according to a target mobile device type selected by the user or a target format designated by the user. The storage server is adapted to store a multimedia resource which is downloaded and transcoded by the offline downloading and transcoding server cluster. The offline downloading and transcoding server cluster is further adapted to report basic configuration information and load information of the offline downloading and transcoding server cluster to the task scheduling and managing server. The task scheduling and managing server is further adapted to allocate the offline scheduling and transcoding task to the offline downloading and transcoding server cluster according to the basic configuration information and the load information submitted by the offline downloading and transcoding server cluster. The multimedia resource comprises data slices. The offline downloading and transcoding server cluster is further adapted to receive an offset of a designated slice submitted by the client when the client needs to designate another slice which belongs to a same file with a current slice being played or previewed, perform the offline downloading and transcoding task from the designated slice according to the offset of the slice.
Description
MOBILE MULTIMEDIA REAL-TIME TRANSCODING SYSTEM, APPARATUS, STORAGE MEDIUM AND
METHOD
FIELD OF THE DISCLOSURE
The present disclosure relates to real-time transcoding techniques, and more particularly, to a mobile
multimedia real-time transcoding server based on offline downloading, a client, a system, a storage medium
and a method thereof.
BACKGROUND OF THE DISCLOSURE
Mobile video refers to a service such as live broadcasting, broadcasting on demand and downloading of
various video/audio contents including movies, entertainments, original works, sports, music, which are
provided to users via mobile devices and based on a mobile network. The mobile network includes a general
packet radio service (GPRS) network, an enhanced data rate for GSM evolution (EDGE) network, a 3
generation (3G) network, or a wireless fidelity (WiFi) network, etc. With the rapid development of multimedia
and computer techniques, video playing and applications have gained a big success on personal computers
(PCs). With the coming of the 3G era, mobile videos become increasingly hot and demands for mobile videos
show an explosive growth. Desires of users of visiting multimedia resources anytime and anywhere increase
with time.
The playing of a video on a mobile device usually involves a video format conversion problem. Most
existing mobile videos need to be processed by a format converting system, i.e., the video program is
transcoded according to a specific format and code rate. The processed video program is fit for being played
on the mobile device. At present, a format converting system includes a video convertor, an audio convertor, a
picture format convertor, a document format converter, etc. With the development of the Internet and the
mobile network, there are more and more media playing platforms. Thus, the media platforms support more
and more media formats. From cellphone, to IPTV, to high definition digital broadcast, different platforms have
different requirements on the formats of the contents, such as encoding format, resolution, and frame rate.
Therefore, conversion of content encoding format becomes indispensable.
At present, there are three transcoding requirements: 1) conversion requirement between different video
formats, e.g., from moving pictures experts group/motion pictures experts group (MPEG)-2 or MPEG-4 to
H.264. 2) Content transmitting requirement: it is required to change the bit rate to meet requirements of
different network bandwidths or device playing speeds. 3) Definition requirement: it is required to convert a high
definition video to a standard definition video or a low definition video, or vice versa. An example is as follows.
In order to edit information and upload the information to a website such as YouTube, a video needs to be
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transmitted from a camera to a PC. During the transmission of the video data, the conversion is performed, e.g.,
from the camera (audio video interleaved (AVI) format) to the PC (MPEG-2 for editing or MPEG-4 for storage)
and then to the website (H.263/H.264/Flash). If a file on the website needs to be played on the PC, the
transcoding is performed to the file to play the file by RealPlayer or Windows Media Player software.
There are the following two manners to enable a user to watch a mobile video on a mobile device.
In one manner, the network is searched for a video in a video format can be played on the mobile device.
The video is downloaded to the mobile device for play or is played online. If the video is downloaded to the
mobile device for play, dedicated downloading software is usually required. After a long time, downloading of
the video is finished and then the video can be played. If the video is played online, a website needs to prepare
a transcoded target video in advance.
In the other manner, a format conversion is performed using a local transcoding system of the client that
the user logs in. Dedicated transcoding software is installed in the mobile device. An original file which needs to
be transcoded is imported into the transcoding software. The user may configure transcoding parameters
related to a target format to be outputted, such as target file name, code rate, split the video or not, etc. Then
the transcoding is started. After the transcoding, it is synchronized on the mobile device again. This manner is
not fit for playing on the mobile device. The transcoding procedure on the client is very complicated and is time
consuming.
SUMMARY OF THE DISCLOSURE
Examples of the present disclosure provide a mobile multimedia real-time transcoding server based on
offline downloading, a client, a system, a storage medium and a method thereof, so as to realize real-time
transcoding and improve a playing effect.
According to an example of the present disclosure, a mobile multimedia real-time transcoding method
based on offline downloading is provided. The method includes:
receiving, by a server side, an offline downloading and transcoding task request submitted by a client,
wherein the offline downloading and transcoding task request comprises a target mobile device type selected
by a user or a user designated target format; and
performing, by the server side, an offline downloading and transcoding task following scheduling and in a
manner of performing offline downloading and transcoding in parallel according to the target mobile device type
selected by the user or the user designated target format carried in the offline downloading and forwarding task
request submitted by the client, and providing an obtained multimedia resource to the client;
the method further comprises:
reporting, by an offline downloading and transcoding server cluster at the server side, basic configuration
information and load information of the offline downloading and transcoding server cluster to a task scheduling
and managing server; and
the scheduling comprises: allocating, by the task scheduling and managing server, the offline scheduling
and transcoding task to the offline downloading and transcoding server cluster according to the basic
configuration information and the load information submitted by the offline downloading and transcoding server
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cluster;
wherein the multimedia resource comprises data slices;
the method further comprises: obtaining by the client the data slices from a storage server, submitting,
when needs to designate another slice which belongs to a same file with a current slice being played or
previewed, an offset of the designated slice to the offline downloading and transcoding server cluster;
performing, by the offline downloading and transcoding server cluster, the offline downloading and transcoding
task from the designated slice according to the offset of the slice.
According to another example of the present disclosure, a mobile multimedia real-time transcoding
server based on offline downloading is provided. The server includes: a task scheduling and managing server,
an offline downloading and transcoding server cluster, a storage server; wherein
the task scheduling and managing server is adapted to transmit an offline downloading and transcoding
task request of a client, and schedule the distributed offline downloading and transcoding server cluster;
the offline downloading and transcoding server cluster is distributed and is adapted to accept scheduling
of the task scheduling and managing server, perform an offline downloading and transcoding task in a manner
of performing offline downloading and transcoding in parallel according to a target mobile device type selected
by the user or a target format designated by the user; and
the storage server is adapted to store a multimedia resource which is downloaded and transcoded by the
offline downloading and transcoding server cluster;
wherein
the offline downloading and transcoding server cluster is further adapted to submit basic configuration
information and load information of the offline downloading and transcoding server cluster to the task
scheduling and managing server; and
the task scheduling and managing server is further adapted to allocate the offline downloading and
transcoding task to the offline downloading and transcoding server cluster according to the basic configuration
information and the load information of the offline downloading and transcoding server cluster;
wherein the multimedia resource comprises data slices;
the offline downloading and transcoding server cluster is further adapted to perform the offline
downloading and transcoding task from a slice designated by the user according to an offset of the slice
submitted by the client.
According to still another example of the present disclosure, a client is provided. The client includes: a
generating module and a transmitting module; wherein
the generating module is adapted to generate an offline downloading and transcoding task request,
wherein the offline downloading and transcoding task request comprises a target mobile device type selected
by a user and a target format designated by the user; and
the transmitting module is adapted to transmit the offline downloading and transcoding task request to a
server side, so as to obtain a requested multimedia resource from the server side.
According to yet another example of the present disclosure, a mobile multimedia real-time transcoding
system is provided. The system includes: a client, a task scheduling and managing server, an offline
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downloading and transcoding server cluster and a storage server; wherein
the client is adapted to submit an offline downloading and transcoding task request to the task scheduling
and managing server, wherein the offline downloading and transcoding task request comprises a target mobile
device type selected by a user and a target format designated by the user, and obtain a requested multimedia
resource;
the task scheduling and managing server is adapted to transmit an offline downloading and transcoding
task request of a client, and schedule the distributed offline downloading and transcoding server cluster;
the offline downloading and transcoding server cluster is distributed and is adapted to accept scheduling
of the task scheduling and managing server, perform an offline downloading and transcoding task in a manner
of performing offline downloading and transcoding in parallel according to a target mobile device type selected
by the user or a target format designated by the user; and
the storage server is adapted to store a multimedia resource which is downloaded and transcoded by the
offline downloading and transcoding server cluster;
wherein the offline downloading and transcoding server cluster is further adapted to report basic
configuration information and load information of the offline downloading and transcoding server cluster to the
task scheduling and managing server;
the task scheduling and managing server is further adapted to allocate the offline scheduling and
transcoding task to the offline downloading and transcoding server cluster according to the basic configuration
information and the load information submitted by the offline downloading and transcoding server cluster;
the multimedia resource comprises data slices;
the offline downloading and transcoding server cluster is further adapted to receive an offset of a
designated slice submitted by the client when the client needs to designate another slice which belongs to a
same file with a current slice being played or previewed, perform the offline downloading and transcoding task
from the designated slice according to the offset of the slice.
According to yet another example of the present disclosure, a non-transitory computer-readable storage
medium comprising a set of instructions for implementing a mobile multimedia real-time transcoding method is
provided, the method includes:
receiving, by a server side, an offline downloading and transcoding task request submitted by a client,
wherein the offline downloading and transcoding task request comprises a target mobile device type selected
by a user or a user designated target format; and
performing, by the server side, an offline downloading and transcoding task following scheduling and in a
manner of performing offline downloading and transcoding in parallel according to the target mobile device type
selected by the user or the user designated target format carried in the offline downloading and forwarding task
request submitted by the client, and providing an obtained multimedia resource to the client;
the method further comprises:
reporting, by an offline downloading and transcoding server cluster at the server side, basic configuration
information and load information of the offline downloading and transcoding server cluster to a task scheduling
and managing server; and
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the scheduling comprises: allocating, by the task scheduling and managing server, the offline scheduling
and transcoding task to the offline downloading and transcoding server cluster according to the basic
configuration information and the load information submitted by the offline downloading and transcoding server
cluster;
wherein the multimedia resource comprises data slices;
the method further comprises: obtaining by the client the data slices from a storage server, submitting,
when needs to designate another slice which belongs to a same file with a current slice being played or
previewed, an offset of the designated slice to the offline downloading and transcoding server cluster;
performing, by the offline downloading and transcoding server cluster, the offline downloading and transcoding
task from the designated slice according to the offset of the slice.
According to examples of the present disclosure, a server side performs the offline downloading and
transcoding task in a manner of performing offline downloading and transcoding in parallel according to a target
mobile device type selected by the user or a user designated target format carried in the offline downloading
and transcoding task request submitted by the user. The server side provides the obtained multimedia
resource to the client.
According to the examples of the present disclosure, the offline downloading and transcoding task can be
performed according to the target mobile device type selected by the user or the user designated target format,
source of the resource is not restricted. Thus, various requirements of the user can be met. The offline
downloading and transcoding task is performed following scheduling in the manner of performing the offline
downloading and transcoding in parallel, which saves time, realizes dynamic and balanced scheduling and
realizes real-time transcoding. Thus, the playing effect is improved.
In the description in this specification reference may be made to subject matter which is not within the
scope of the appended claims. That subject matter should be readily identifiable by a person skilled in the art
and may assist in putting into practice the invention as defined in the presently appended claims.
BRIEF DESCRIPTION OF THE DRAWINGS
is a schematic diagram illustrating a structure of a system according to an example of the present
disclosure.
is a schematic diagram illustrating a structure of a mobile multimedia real-time transcoding system
based on offline downloading according to an example of the present disclosure.
is a flowchart illustrating a principle of a method according to an example of the present disclosure.
DETAILED DESCRIPTION OF THE DISCLOSURE
In the present disclosure, the term “includes” means includes but not limited to, the term “including”
means including but not limited to. The term “comprises” means comprises but not limited to, and the term
“comprising” means comprising but not limited to.
In one manner to enable a user to watch a mobile video on a mobile device, the network is searched for
a video in a video format can be played on the mobile device. The video is downloaded to the mobile device for
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play or is played online.
In this manner, the user has to find a video format fit for being played on the mobile device, e.g., 3GP (a
video encoding format of 3G streaming media). Since video resources whose formats have been converted are
adopted, the source of the multimedia resource is limited to existing formats. Not all of the video resources can
be selected and played. The manner of finding a ready-to-play format restricts the source of the video resource.
If the video file fit for being played on the mobile device is not found, an original video file has to be downloaded.
This procedure requires long time waiting, which wastes time and consumes much bandwidth. Then, the video
transcoding is performed before synchronizing the video resource to the mobile device for playing. Even if the
video is on an online website, the video cannot be used before being pre-transcoded by the website. Thus,
according to this manner, the source of the video resource is restricted. The user is restricted in few selections.
In addition, the format and code rate of the transcoding are fixed. It is hard to achieve a balance between
definition and fluency according to each user’s requirement.
In another manner to enable a user to watch a mobile video on a mobile device, a format conversion is
performed using a local transcoding system of the client that the user logs in. Dedicated transcoding software
is installed in the mobile device. An original file which needs to be transcoded is imported into the transcoding
software.
In this manner, the user has to obtain a video file in a conventional format and then performs a video
format transcoding at the client end. Thereafter, the video file is imported into the mobile device for watching.
Through the transcoding at the client end, although source of the video resource is not restricted, this manner
requires the user knowing many encoding techniques, e.g., resolution, code rate and frame rate, etc. Not all of
the users know the knowledge. Thus the user group is limited. For the resolution, the video resolution
supported by each type of mobile device has an upper limit. Most of them do not support videos with
resolutions exceeding a screen physical resolution of the mobile device. For the code rate, the code rate
supported by each type of mobile device also has an upper limit, usually below 1Mbps. For the frame rate,
recent mobile devices support 30 frames per second (fps) at most.
In addition, video transcoding is a procedure with a high computation load. Operations including decoding,
video filtering/image processing, and encoding according to an output format need to be performed to the input
video stream. The transcoding (especially video transcoding) is a time consuming and resource consuming
procedure, especially for high definition videos. Whether the former or the latter manner is adopted, the
initiation and execution of the transcoding is processed centrally, which requires a long waiting time and
occupies much central processing unit (CPU) processing time. For the mobile device, it is impossible to
perform a large amount of dynamic complicated decoding. Even if the newest type cell phone is adopted, there
are also limitations on parameters for supporting videos. In addition, according to conventional transcoding
technique, data cannot be shared. For the same file, if one user needs to transcode this file, after the file is
transcoded at the client end of the user, other users have to perform local transcoding operation again if they
require the same file.
Examples of the present disclosure adopt a real-time transcoding technique. In this technique, a mobile
device user submits a watching request for watching a multimedia resource. A transcoding system presents
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the multimedia resource to the user for watching in real-time according to the request. According to a target
mobile device type selected by the user or a user designated target format, an offline downloading server
downloads corresponding contents according to a downloading and transcoding task request submitted by the
user via a client that the user logs in. The contents are automatically transcoded at the offline downloading
server side. Alternatively, an appropriate content resource may be found at the offline downloading server side.
Thus, multimedia resources from different sources may be integrated and visited via a uniform interface.
According to the target mobile device type selected by the user when initiating the offline downloading and
transcoding task, the downloading and transcoding may be performed in parallel, i.e., transcoding while
downloading. The user does not need to wait for the complete of the downloading before starting the
transcoding. The real-time transcoding is realized. Once there is transcoded data, a preview may be provided
on the mobile device, which facilitates the user to determine whether he wants the transcoded contents. A
preview of the transcoded contents may be provided to the user. At the same time, the user is allowed to select
a position to start the transcoding not from the beginning, i.e., a preview of different parts of the file may be
provided to the user. The solution of the present disclosure is compatible with mobile multimedia applications.
Since the target mobile device type selected by the user or the user designated target format is submitted, the
multimedia watched by the user on the mobile device is tailored for the mobile device. Therefore, a balance is
realized between a watching definition and a watching fluency.
The multimedia transcoding is a time-consuming and resource-consuming procedure. The situation
becomes even worse for high definition multimedia. In examples of the present disclosure, a distributed cluster
technique is adopted. Different from conventional central processing, the distributed cluster technique
increases the speed of the multimedia transcoding procedure. In the cluster technique, a distributed system
consists of PC servers replaces a large scale machine. The distributed processing realizes scheduling and
management with a high efficiency. Multiple downloading and transcoding tasks may be executed in parallel.
Thus, throughput and efficiency of the transcoding are increased. The cluster is transparent for the user. The
user does not need to know technical details of the cluster. The user only needs to submit a
download/transcoding task to a cluster node at the server side, and retrieve required multimedia resource from
a specific position after the transcoding is finished.
Hereinafter, the present disclosure is described in further detail with reference to accompanying drawings
and examples to make the technical solution and merits therein clearer.
A mobile multimedia real-time transcoding system based on offline downloading is as shown in
The system includes: a client at a mobile device side of the user, a task scheduling and managing server at a
server side, an offline downloading and transcoding server cluster at the server side, and a storage server at
the server side. The client is adapted to transmit an offline downloading and transcoding task request to the
task scheduling and managing server, wherein the request carries a target mobile device type selected by the
user and a target format designated by the user. The client is also adapted to obtain the requested multimedia
resource. The task scheduling and managing server is adapted to manage a list of offline downloading and
transcoding tasks, transmit the offline downloading and transcoding task request of the client, and schedule the
distributed offline downloading and transcoding server cluster. The offline downloading and transcoding server
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cluster is distributed, adapted to be scheduled by the task scheduling and managing server, perform an offline
downloading and transcoding task in a manner of performing offline downloading and transcoding in parallel
according to the target mobile device type selected by the user and the target format designated by the user.
The storage server is adapted to store the multimedia resource which is downloaded and transcoded by the
offline downloading and transcoding server cluster.
It should be noted that, the offline downloading refers to that a server of a downloading tool of the user
downloads the contents first for the user. For example, if a multimedia resource is less popular, the
downloading speed is low. The user has to spend a long downloading time. If the user adopts the offline
downloading technique provided by the example of the present disclosure, a server side of a service provider
may download the multimedia resource for the user. The user may close the downloading tool or shut down the
mobile device, so as to save time and power. After the offline downloading is finished, the user downloads the
multimedia resource to his mobile device with a high downloading speed from the sever side. The offline
downloading saves much waiting time of the user. More important, the mobile device user can save time,
device resources and bandwidth to perform other operations. The principle of the offline downloading is as
follows: (1) the user submits a downloading request via the client or a web interface; (2) the server side of the
operator receives the request and checks whether a downloading link submitted by the user has been
downloaded before. If not, the server side starts multithread to download. If yes, the downloaded multimedia
resource (or the link of the multimedia resource) is put in an offline storage space of the server side; (3) after
the offline downloading is finished, the server side notifies the user. The user logs in the offline storage space
and retrieves the multimedia resource. During this procedure, the multimedia resource may be obtained from
users which have downloaded or are downloading the same file via a peer-to-peer (P2P) manner.
As to the transcoding, it supports conversion of an original multimedia resource to a multimedia resource
in the target format designated by the user according to the target mobile device type selected by the user or
the target format designated by the user.
In addition, the offline downloading and transcoding server cluster at the server side includes a server
cluster on which an offline downloading function and a transcoding function are integrated, or includes two
different server clusters which respectively perform the offline downloading function and the transcoding
function. The task scheduling and managing server includes a server on which a task management function
and a scheduling function are integrated, or includes two different servers respectively performing the task
management function and the scheduling function. The storage server may be a server integrated in the offline
downloading and transcoding server cluster.
In addition, the offline downloading and transcoding server cluster is adapted to submit its basic
configuration information and load information to the task scheduling and managing server. The task
scheduling and managing server allocates the offline downloading and transcoding task to the offline
downloading and transcoding server cluster according to the basic confirmation information and the load
information.
In addition, the offline downloading and transcoding server cluster submits a current downloading and
transcoding progress to the task scheduling and managing server, and write a mapping record of a hash file
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generated by executing the offline downloading and transcoding task into a database. The database stores the
mapping record of the hash file. The task scheduling and managing server obtains the current offline
downloading and transcoding progress and provides to the client for inquiry.
In addition, after receiving the offline downloading and transcoding task request submitted by the client,
the task scheduling and managing server determines according to the mapping record of the hash file stored in
the database that there is the multimedia resource which has been downloaded offline and transcoded, and
provides the multimedia resource which has been downloaded offline and transcoded to the client for preview
or play.
In addition, the multimedia resource includes data slices. The client obtains the data slices from the
storage server, submit, when needs to designate another slice which belongs to the same file with the slice
currently played or previewed, an offset of the designated slice to the offline downloading and transcoding
server cluster. The offline downloading and transcoding server cluster begins to perform the offline
downloading and transcoding task from the slice designated by the user. Since the downloading and
transcoding can be started from a designated position, the user is able to update the offline downloading and
transcoding task at any moment according to a play/preview requirement. Thus, the user can obtain the data of
the designated slice rapidly. And a better local play/preview effect is achieved.
shows a system structure according to another example of the present disclosure. The task
scheduling and managing server includes two different servers which respectively performs the task
management function and the scheduling function, i.e., the task scheduling server and a task managing server.
The storage server may be a cloud storage server.
Hereinafter, the devices in the example are described.
Client: (1) submit an offline transcoding original link of the offline downloading and transcoding task, e.g.,
a uniform/universal resource locator (URL), and a target mobile device type selected by the user or a target
format designated by the user, so as to convert an original multimedia resource to a multimedia format required
by different mobile devices, e.g., Android cellphone, or ipad platform, or detect the type of the current mobile
device of the user and submits information to the task managing server; (2) if the user requires data of another
slice which belongs to the same file with the current slice being played or previewed, the client submits an
offset of the slice to the offline downloading and transcoding server cluster via the task managing server and
the task scheduling server, such that the offline downloading and transcoding server execute the offline
downloading and transcoding task from the designated slice to support dragging during the offline downloading
and transcoding procedure; (3) retrieved data which has been downloaded offline and transcoded to the client
for play/preview.
The client in the example of the present disclosure may include a generating module and a transmitting
module.
The generating module is adapted to generate the offline downloading and transcoding task request,
wherein the offline downloading and transcoding task request carries the target mobile device type selected by
the user and the target format designated by the user.
The transmitting module is adapted to transmit the offline downloading and transcoding task request to
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the server side, so as to obtain the requested multimedia resource from the server side.
The offline downloading and transcoding server cluster: (1) Accept scheduling of the task scheduling
server. (2) Download the original multimedia resource such as video or audio resource which requires offline
downloading and transcoding according to the offline transcoding original link provided by the client, and store
the resource in an offline storage space of the user. (3) Perform the offline downloading and transcoding
operation according to the target mobile device type selected by the user or the target format designated by the
user, transmit data slices of the multimedia resource generated by the offline downloading and transcoding to
the cloud storage server for retrieval of the client; report an offline downloading and transcoding operation
progress to the task scheduling server. (4) Provide a support for client when retrieving the transcoded resource
after the offline downloading and transcoding is finished. (5) Registers its basic configuration information to the
task scheduling server, e.g., address, disk space, load information such as CPU load information, such that the
task scheduling server performs dynamic and balanced scheduling according to the load information, and
achieve a balance between watching definition and watching fluency. (6) Write a mapping record of a final hash
file generated by the offline downloading and transcoding to the database.
The task scheduling server: (1) Receive basic configuration information and load information reported by
each node of the offline downloading and transcoding server cluster. (2) Dynamically allocate the offline
downloading and transcoding task to different nodes of the offline downloading and transcoding server cluster
according to the basic configuration information and the load information. (3) Receive the offline downloading
and transcoding progress reported by the offline downloading and transcoding server cluster, and report the
progress information to the task managing server. (4) Filter same offline downloading and transcoding task
requests; for the same offline downloading and transcoding task requests, transmit only one of them to the
offline downloading and transcoding server cluster, different users may share the offline downloading and
transcoding progress of the same task.
The task managing server: (1) Receive the offline downloading and transcoding task request submitted
by the client, generate a unique identifier for each independent offline downloading and transcoding task. (2)
Provide the original link of the offline downloading and transcoding task to the task scheduling server. (3)
Receive an offline downloading and transcoding task file slice change request submitted by the client,
schedules the request to the task scheduling server. (4) Receive the offline downloading and transcoding
progress information reported by the task scheduling server, and provide the offline transcoding progress to the
client for inquiry. (5) If it is determined according to the mapping record that there is data which has been
downloaded offline and transcoded, notify the client that the offline downloading and transcoding succeeds to
realize a spike transcoding (cloud transcoding). (6) When the client needs to play and retrieve the data which
has been downloaded offline and transcoded, provide an entry address for the client to retrieve the data.
An example of the present disclosure also provides a mobile multimedia real-time transcoding method
based on offline downloading. As shown in the method includes the following.
At block 101, the client submits an offline downloading and transcoding task request to a server side.
Herein, the offline downloading and transcoding task request carries a target mobile device type selected
by the user or a target format designated by the user.
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At block 102, the server side receives the offline downloading and transcoding task request submitted by
the client, executes an offline downloading and transcoding task in a manner of performing offline downloading
and transcoding in parallel according to the target mobile device type selected by the user or the target format
designated by the user.
Herein, if the server side has already had the multimedia resource which has been downloaded offline
and transcoded, the multimedia resource may be found and provided to the client directly.
In addition, before accepting the scheduling, the method further includes: the offline downloading and
transcoding server cluster submits its basic configuration information and load information to the task
scheduling and managing server.
The scheduling includes: the task scheduling and managing server allocates the offline downloading and
transcoding task to the offline downloading and transcoding server cluster according to the basic configuration
information and load information submitted by the offline downloading and transcoding server cluster.
In addition, the method further includes: the offline downloading and transcoding sever cluster provides a
current offline downloading and transcoding progress to the task scheduling and managing server, and writes a
mapping record of a hash file generated by performing the offline downloading and transcoding task to a
database.
In addition, after receiving the transcoding progress, the method further includes: the task scheduling and
managing server provides the transcoding progress to the client for inquiry.
In addition, after the task scheduling and managing server receives the offline downloading and
transcoding task request, the method further includes: determine through querying the mapping record of the
hash file stored in the database that there is a multimedia resource which has been downloaded offline and
transcoded, provide the multimedia resource to the client for preview or play.
Furthermore, the multimedia resource includes data slices. The method further includes: the client
obtains the data slices from the storage server, submits, when needs to designate another slice which belongs
to the same file with the slice currently played or previewed, an offset of the designated slice to the offline
downloading and transcoding server cluster, retrieve the data slice after the offline downloading and
transcoding is performed to the client for play/preview. The offline downloading and transcoding server cluster
starts the offline downloading and transcoding task from the slice designated by the user according to the offset
of the slice.
A method example
This example includes the following.
Block 201, a user submits downloading information (including a URL, or an eMule downloading link, or
BitTorrent seed file information), the client initiates an offline downloading and transcoding task request, selects
a mobile device that the user plays the multimedia resource with, e.g., an Android cellphone, an ipad platform,
or the client detects the type of the mobile device of the user.
At block 202, the task managing server forwards the offline downloading and transcoding task request
received from the client to the task scheduling server. If the downloading address is an URL, the URL is
forwarded. At the same time, the target mobile device type selected by the user or the target format designated
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by the user included in the request is also forwarded. After receiving the request, the task managing server
queries the mapping record of the database. If it is detected according to the mapping record that there is a
corresponding multimedia resource which has been downloaded offline and transcoded in the cloud storage
server, the task managing server notifies the client and the client may start to play or preview and retrieve the
corresponding multimedia resource.
At block 203, if there is no matching multimedia resource in the cloud storage server, the offline
downloading and transcoding task request is forwarded to the task scheduling server.
At block 204, if the offline downloading and transcoding server cluster has different server clusters which
respectively perform the offline downloading and the transcoding, the task scheduling server schedules the
offline downloading task according to the load information of the offline downloading server cluster. The offline
downloading server cluster starts the downloading according to the URL to download data from the Internet.
After one data slice is downloaded, the transcoding server cluster may start to perform the transcoding task.
Thus, the original multimedia resource is converted into a corresponding multimedia resource according to the
target mobile device type selected by the user or the target format designated by the user. At the same time,
the transcoding progress and intermediate state information are reported to the client.
Herein, after one video or audio file is transcoded, during the validity time of the offline storage space of
the user, the video or audio file may be used by different users without transcoding again. It is only required to
retrieve the file from the cloud storage server by occupying some network bandwidths. During the processing
of one file or one data stream, the transcoding server cluster may convert the file or data stream into multiple
target files with different resolutions, different code rates or different formats, which depends on the parameter
of the mobile device carried in the offline downloading and transcoding task request initiated by the client, the
target mobile device type selected by the user and the target format designated by the user.
At block 205, the client receives the transcoding progress, the client retrieves transcoded data from the
transcoding server cluster, and the transcoded result and file mapping record are written in the database.
At block 206, the data slice which has been transcoded is transmitted to the cloud storage server for
synchronization. The client obtains the data slice for play. If the mobile device wants to play another slice
belongs to the same file with the current slice, the client initiates an offline downloading and transcoding task
request again. Generally, an offset of the slice to be played is transmitted to the offline downloading and
transcoding server cluster. The offline downloading and transcoding server cluster starts downloading and
transcoding from the designated slice according to the offset.
It should be noted that, for the mapping record stored in the database in the example of the present
disclosure, a mapping relationship of the transcoding format at the server side is as follows: the file before
being transcoded is identified uniquely by a hash value of the contents of the file; the file after being transcoded
is identified by the hash value of the contents of the file and a corresponding output mode (e.g., format, code
stream, resolution and frame rate of the transcoding). A one-to-multiple relationship is established between the
file before the transcoding and the file after the transcoding. The relationship mapping table is maintained by
the task managing server. According to the mapping table, it can be determined whether a file has been
transcoded into a format. Or, a file hash of a file before being transcoded corresponding to a file after being
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transcoded may be determined according to the mapping table. The mapping record is written by the offline
downloading and transcoding server cluster in the database after an offline downloading and transcoding task
is finished.
Those skilled in the art would know that the example of the present disclosure may be implemented as a
method, a system or a computer program product. Therefore, the present disclosure may be implemented by
hardware, software or a combination of software and hardware. In addition, the present disclosure may be a
computer program product implemented on a computer readable storage medium (includes but is not limited to
disk memory and optical memory) including a series of computer readable instructions.
The present disclosure is described with reference to flowchart and/or schematic diagrams of method,
device (system), and computer program product. It should be noted that each flow and/or block in the flowchart
and/or the schematic diagram, and a combination of the flow and/or block in the flowchart and/or schematic
diagram may be implemented by computer readable instructions. The computer readable instructions may be
provided to a general purpose computer, a dedicated computer, an embedded computer or a processor of
other programmable data processing device, so as to implement an apparatus for performing functions of one
or more flows in the flowchart and/or one or more blocks in the diagram.
The computer readable instructions may also be stored in a computer readable storage which may boot a
computer or another programmable data processing device in a specific working manner, such that the
instructions in the computer readable storage generates a product including an instruction apparatus, wherein
the instruction apparatus implements functions of one or more flows in the flowchart and/or one or more blocks
in the block diagram.
The computer program instructions may also be loaded on a computer or another programmable data
processing device to perform a series of operations on the computer or the programmable data processing
device to generate a computer implementation, such that the instructions in the computer readable storage
generates a product including an instruction apparatus, wherein the instruction apparatus implements
functions of one or more flows in the flowchart and/or one or more blocks in the block diagram.
Hereinafter, terms used in examples of the present disclosure are explained.
The client in the examples of the present disclosure is a downloading client which has an offline
downloading capability.
The multimedia transcoding in the examples of the present disclosure is to convert a multimedia code
stream which has been compression encoded into another multimedia code stream, so as to meet the
requirements of different network bandwidths, different terminal processing abilities and different users. The
transcoding first includes a procedure of decoding and then a procedure of encoding. The code streams before
and after the transcoding may conform to the same multimedia encoding standard or different multimedia
coding standards.
What has been described and illustrated herein is a preferred example of the disclosure along with some
of its variations. Many variations are possible within the scope of the disclosure.
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Claims (10)
1. A mobile multimedia real-time transcoding method, comprising: receiving, by a server side, an offline downloading and transcoding task request submitted by a client, wherein the offline downloading and transcoding task request comprises a target mobile device type selected by a user or a user designated target format; and performing, by the server side, an offline downloading and transcoding task following scheduling and in a manner of performing offline downloading and transcoding in parallel according to the target mobile device type selected by the user or the user designated target format carried in the offline downloading and forwarding task request submitted by the client, and providing an obtained multimedia resource to the client; the method further comprises: reporting, by an offline downloading and transcoding server cluster at the server side, basic configuration information and load information of the offline downloading and transcoding server cluster to a task scheduling and managing server; and the scheduling comprises: allocating, by the task scheduling and managing server, the offline scheduling and transcoding task to the offline downloading and transcoding server cluster according to the basic configuration information and the load information submitted by the offline downloading and transcoding server cluster; wherein the multimedia resource comprises data slices; the method further comprises: obtaining by the client the data slices from a storage server, submitting, when needs to designate another slice which belongs to a same file with a current slice being played or previewed, an offset of the designated slice to the offline downloading and transcoding server cluster; performing, by the offline downloading and transcoding server cluster, the offline downloading and transcoding task from the designated slice according to the offset of the slice.
2. The method of claim 1, further comprising: reporting, by the offline downloading and transcoding server cluster, a current offline downloading and transcoding progress to the task scheduling and managing server, and writing a mapping record of a hash file generated by performing the offline downloading and transcoding task to a database.
3. The method of claim 2, further comprising: after the task scheduling and managing server receives the offline downloading and transcoding task request, determining that there is a multimedia resource which has been downloaded offline and transcoded according to the mapping record of the hash file stored in the database, providing the multimedia resource which has been downloaded offline and transcoded to the client for preview or play.
4. The method of claim 1, 2 or 3, further comprising: filtering, by the task scheduling and managing server, same offline downloading and transcoding task 7014426_1.docx requests, forwarding only one of the same offline downloading and transcoding task requests to the offline downloading and transcoding server cluster, wherein different users share the offline downloading and transcoding progress of the same task.
5. A mobile multimedia real-time transcoding server, comprising: a task scheduling and managing server, an offline downloading and transcoding server cluster, a storage server; wherein the task scheduling and managing server is adapted to transmit an offline downloading and transcoding task request of a client, and schedule the distributed offline downloading and transcoding server cluster; the offline downloading and transcoding server cluster is distributed and is adapted to accept scheduling of the task scheduling and managing server, perform an offline downloading and transcoding task in a manner of performing offline downloading and transcoding in parallel according to a target mobile device type selected by the user or a target format designated by the user; and the storage server is adapted to store a multimedia resource which is downloaded and transcoded by the offline downloading and transcoding server cluster; wherein the offline downloading and transcoding server cluster is further adapted to submit basic configuration information and load information of the offline downloading and transcoding server cluster to the task scheduling and managing server; and the task scheduling and managing server is further adapted to allocate the offline downloading and transcoding task to the offline downloading and transcoding server cluster according to the basic configuration information and the load information of the offline downloading and transcoding server cluster; wherein the multimedia resource comprises data slices; the offline downloading and transcoding server cluster is further adapted to perform the offline downloading and transcoding task from a slice designated by the user according to an offset of the slice submitted by the client.
6. The server of claim 5, wherein the offline downloading and transcoding server cluster is further adapted to submit a current offline downloading and transcoding progress to the task scheduling and managing server, and write a mapping record of a hash file generated by performing the offline downloading and transcoding task to a database; the server further comprises the database, adapted to store the mapping record of the hash file; the task scheduling and managing server is further adapted to provide the offline downloading and transcoding progress to the client for inquiry.
7. The server of claim 6, wherein the task scheduling and managing server is further adapted to determine, after receiving the offline downloading and transcoding task request of the client, that there is a multimedia resource which has been downloaded offline and transcoded through querying the mapping record of the hash file stored in the database, and provide the multimedia resource which has been downloaded offline 7014426_1.docx and transcoded to the client for preview or play.
8. A mobile multimedia real-time transcoding system, comprising: a client, a task scheduling and managing server, an offline downloading and transcoding server cluster and a storage server; wherein the client is adapted to submit an offline downloading and transcoding task request to the task scheduling and managing server, wherein the offline downloading and transcoding task request comprises a target mobile device type selected by a user and a target format designated by the user, and obtain a requested multimedia resource; the task scheduling and managing server is adapted to transmit an offline downloading and transcoding task request of a client, and schedule the distributed offline downloading and transcoding server cluster; the offline downloading and transcoding server cluster is distributed and is adapted to accept scheduling of the task scheduling and managing server, perform an offline downloading and transcoding task in a manner of performing offline downloading and transcoding in parallel according to a target mobile device type selected by the user or a target format designated by the user; and the storage server is adapted to store a multimedia resource which is downloaded and transcoded by the offline downloading and transcoding server cluster; wherein the offline downloading and transcoding server cluster is further adapted to report basic configuration information and load information of the offline downloading and transcoding server cluster to the task scheduling and managing server; the task scheduling and managing server is further adapted to allocate the offline scheduling and transcoding task to the offline downloading and transcoding server cluster according to the basic configuration information and the load information submitted by the offline downloading and transcoding server cluster; the multimedia resource comprises data slices; the offline downloading and transcoding server cluster is further adapted to receive an offset of a designated slice submitted by the client when the client needs to designate another slice which belongs to a same file with a current slice being played or previewed, perform the offline downloading and transcoding task from the designated slice according to the offset of the slice.
9. A computer readable storage medium comprising a series of computer readable instructions executable by a computer to perform a mobile multimedia real-time transcoding method, wherein the method comprises: receiving, by a server side, an offline downloading and transcoding task request submitted by a client, wherein the offline downloading and transcoding task request comprises a target mobile device type selected by a user or a user designated target format; and performing, by the server side, an offline downloading and transcoding task following scheduling and in a manner of performing offline downloading and transcoding in parallel according to the target mobile device type selected by the user or the user designated target format carried in the offline downloading and forwarding task request submitted by the client, and providing an obtained multimedia resource to the client; 7014426_1.docx the method further comprises: reporting, by an offline downloading and transcoding server cluster at the server side, basic configuration information and load information of the offline downloading and transcoding server cluster to a task scheduling and managing server; and the scheduling comprises: allocating, by the task scheduling and managing server, the offline scheduling and transcoding task to the offline downloading and transcoding server cluster according to the basic configuration information and the load information submitted by the offline downloading and transcoding server cluster; wherein the multimedia resource comprises data slices; the method further comprises: obtaining by the client the data slices from a storage server, submitting, when needs to designate another slice which belongs to a same file with a current slice being played or previewed, an offset of the designated slice to the offline downloading and transcoding server cluster; performing, by the offline downloading and transcoding server cluster, the offline downloading and transcoding task from the designated slice according to the offset of the slice.
10. A mobile multimedia real-time transcoding method as hereinbefore described with reference to any one of the embodiments and/or the
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201110276066.XA CN103002274B (en) | 2011-09-16 | 2011-09-16 | A kind of mobile multimedia real-time transcoding Play System and method of downloading based on off-line |
CN201110276066 | 2011-09-16 | ||
PCT/CN2012/078636 WO2013037241A1 (en) | 2011-09-16 | 2012-07-13 | Mobile multimedia real-time transcoding playing system, device, storage medium and method |
Publications (2)
Publication Number | Publication Date |
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NZ623572A NZ623572A (en) | 2015-01-30 |
NZ623572B2 true NZ623572B2 (en) | 2015-05-01 |
Family
ID=
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