CN108848406A - A kind of method for recording and device of multimedia file - Google Patents
A kind of method for recording and device of multimedia file Download PDFInfo
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- CN108848406A CN108848406A CN201810646022.3A CN201810646022A CN108848406A CN 108848406 A CN108848406 A CN 108848406A CN 201810646022 A CN201810646022 A CN 201810646022A CN 108848406 A CN108848406 A CN 108848406A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/433—Content storage operation, e.g. storage operation in response to a pause request, caching operations
- H04N21/4334—Recording operations
Abstract
The embodiment of the invention provides a kind of method for recording of multimedia file and device, this method includes：When receiving the recording request of multimedia file, data source, encoder, packing device, the first multimedia writer, the second multimedia writer are created；Pass through data source continuous collecting multi-medium data；Encoder persistently encodes the multi-medium data, and the multi-medium data after coding is written to preset buffer queue；First multimedia writer reads the multi-medium data after encoding from the buffer queue, and the first multimedia file is written；Judge whether first multimedia file is more than preset file size threshold value；The multi-medium data after encoding is read from the buffer queue if so, switching to the second multimedia writer, and the second multimedia file is written.The embodiment of the present invention ensure that be continued working in switching, is avoided the blank of recording, is realized seamless continuous recording.
Description
The application is entitled " a kind of method for recording and device of multimedia file " proposed on July 27th, 2015
Chinese invention patent application 201510447305.1 divisional application.
Technical field
The present invention relates to multimedia technical fields, more more particularly to the method for recording and one kind of a kind of multimedia file
The record device of media file.
Background technique
In field of video monitoring such as automobile data recorder, place monitoring, long-time recorded video is generally required.
In current video record tool, due to the limitation of file system and computing platform, need to set when recording
The upper dimension bound of recorded video file continuously stores the video of recording with multiple video files.
But it when terminating the recording of video file, needs to close video record tool, is re-starting video file
It carries out the operation such as initializing when recording, then restarting video record tool, and starting.
It can be seen that needing to consume a longer time in video file handoff procedure, can not be recorded in handoff procedure,
The blank on monitoring period is caused, for requiring stringent monitoring field, there may be seriously ask for the loss of this video data
Topic.
Summary of the invention
In view of the above problems, the embodiment of the present invention is proposed in order to provide a kind of a kind of multimedia text for overcoming the above problem
The method for recording of part and a kind of corresponding record device of multimedia file.
To solve the above-mentioned problems, the embodiment of the invention discloses a kind of method for recording of multimedia file, including：
When receiving the recording request of multimedia file, creation data source, encoder, packing device, the first multimedia writer,
Second multimedia writer；
Pass through data source continuous collecting multi-medium data；
Encoder persistently encodes the multi-medium data, and the multi-medium data after coding is written to preset caching
Queue；
First multimedia writer reads the multi-medium data after encoding from the buffer queue, and the first multimedia text is written
Part；
Judge whether first multimedia file is more than preset file size threshold value；If so, switching to the second multimedia
Writer reads the multi-medium data after encoding from the buffer queue, and the second multimedia file is written.
Preferably, the first multimedia writer includes the first writer and the first packing device, second multimedia
Writer includes the second writer and the second packing device.
Preferably, the first multimedia writer reads the multi-medium data after encoding from the buffer queue, and writes
The step of entering the first multimedia file include：
First packing device reads the multi-medium data after encoding from the buffer queue；
Multi-medium data after coding is packaged into multi-medium data packet by the first packing device；
The first multimedia file is written in the multi-medium data packet by the first writer.
Preferably, the first multimedia writer reads multi-medium data packet from the buffer queue, and is written first
The step of multimedia file includes：
When first multimedia file is more than preset file size threshold value, the first multimedia writer generates encapsulation and completes
Event；
First multimedia writer broadcasts the encapsulation completion event.
Preferably, described to judge the step of whether first multimedia file is more than preset file size threshold value packet
It includes：
Judge whether to receive and event is completed by the encapsulation of the first multimedia writer broadcast；If so, judging more than described first
Media file is more than preset file size threshold value.
Preferably, the second multimedia writer that switches to reads the multimedia number after encoding from the buffer queue
According to, and the step of the second multimedia file is written includes：
Stop the first packing device and the first writer, meanwhile, the first writer carries out preservation processing to first multimedia；
Start the second packing device and the second writer；
Second packing device reads the multi-medium data after encoding from the buffer queue；
Multi-medium data after coding is packaged into multi-medium data packet by the second packing device；
The second multimedia file is written in the multi-medium data packet by the second writer.
Preferably, the buffer queue is configured with mutual exclusion lock, and the second multimedia writer that switches to is from the caching
Queue read coding after multi-medium data the step of include：
First packing device discharges the buffer queue；
Second packing device locks the buffer queue；
Second packing device reads the multimedia number after encoding from the buffer queue by the interface of reading that the buffer queue provides
According to.
Preferably, the data source includes camera and/or microphone, the multi-medium data include video data and/
Or audio data；
The step of continuous collecting multi-medium data by data source includes：
Video data is acquired from camera by preset camera source class CameraSource；
And/or
Audio data is acquired from microphone by preset audio-source class AudioSource.
The embodiment of the invention also discloses a kind of method for recording of multimedia file, including：
When receiving the recording request of multimedia file, creation data source, encoder, packing device, the first writer, second are write
Enter device；
Pass through data source continuous collecting multi-medium data；
Encoder persistently encodes the multi-medium data；
Packing device continues the multi-medium data after coding being packaged into multi-medium data packet, and the multi-medium data packet is write
Enter preset buffer queue；
First writer reads multi-medium data packet from the buffer queue, and the first multimedia file is written；
Judge whether first multimedia file is more than preset file size threshold value；If so, switching to the second writer
Multi-medium data packet is read from the buffer queue, and the second multimedia file is written.
Preferably, the step of the first multimedia file of said write includes：
When first multimedia file is more than preset file size threshold value, the first writer generates encapsulation completion event；
First writer broadcasts the encapsulation completion event.
Preferably, described to judge the step of whether first multimedia file is more than preset file size threshold value packet
It includes：
Judge whether to receive and event is completed by the encapsulation of the first writer broadcast；If so, judging the first multimedia text
Part is more than preset file size threshold value.
Preferably, it is described switch to the second writer from the buffer queue read multi-medium data packet the step of include：
Stop the first writer, meanwhile, the first writer carries out preservation processing to first multimedia；
Start the second writer；
Second writer reads the multi-medium data packet from the buffer queue.
Preferably, the buffer queue is configured with mutual exclusion lock, and second writer that switches to is read from the buffer queue
The step of taking multi-medium data packet include：
First writer discharges the buffer queue；
Second writer locks the buffer queue；
Second writer reads the multi-medium data packet from the buffer queue by the reading interface that the buffer queue provides.
Preferably, the data source includes camera and/or microphone, the multi-medium data include video data and/
Or audio data；
The step of continuous collecting multi-medium data by data source includes：
Video data is acquired from camera by preset camera source class CameraSource；
And/or
Audio data is acquired from microphone by preset audio-source class AudioSource.
The embodiment of the invention also discloses a kind of record devices of multimedia file, including：
Recording tool creation module, in the recording request for receiving multimedia file, creation data source, to be beaten encoder
Packet device, the first multimedia writer, the second multimedia writer；
Multi-medium data acquisition module, for passing through data source continuous collecting multi-medium data；
Coding module, for persistently being encoded to the multi-medium data by encoder, and by the multimedia number after coding
According to the preset buffer queue of write-in；
First package module, for reading the multi-medium data after encoding from the buffer queue by the first multimedia writer,
And the first multimedia file is written；
File size judgment module, for judging whether first multimedia file is more than preset file size threshold value；If
It is then to call the second package module；
Second package module reads the multimedia number after encoding from the buffer queue for switching to the second multimedia writer
According to, and the second multimedia file is written.
Preferably, the first multimedia writer includes the first writer and the first packing device, second multimedia
Writer includes the second writer and the second packing device.
Preferably, first package module includes：
First reading submodule, for reading the multi-medium data after encoding from the buffer queue by the first packing device；
First is packaged submodule, for the multi-medium data after coding to be packaged into multi-medium data packet by the first packing device；
First write-in submodule, for the first multimedia file to be written in the multi-medium data packet by the first writer.
Preferably, first package module includes：
It encapsulates completion event and generates submodule, be used for when first multimedia file is more than preset file size threshold value,
First multimedia writer generates encapsulation completion event；
It encapsulates completion event and broadcasts submodule, for broadcasting the encapsulation completion event by the first multimedia writer.
Preferably, the file size judgment module includes：
Completion event judging submodule is encapsulated, is completed for judging whether to receive by the encapsulation of the first multimedia writer broadcast
Event；If so, encapsulation is called to complete judging submodule；
Judging submodule is completed in encapsulation, for judging that first multimedia file is more than preset file size threshold value.
Preferably, second package module includes：
Stop submodule, for stopping the first packing device and the first writer, meanwhile, the first writer is to first multimedia
Carry out preservation processing；
Promoter module, for starting the second packing device and the second writer；
Second reading submodule, for reading the multi-medium data after encoding from the buffer queue by the second packing device；
Second is packaged submodule, for the multi-medium data after coding to be packaged into multi-medium data packet by the second packing device；
Second write-in submodule, for the second multimedia file to be written in the multi-medium data packet by the second writer.
Preferably, the buffer queue is configured with mutual exclusion lock, and second package module includes：
Submodule is discharged, for discharging the buffer queue by the first packing device；
Submodule is locked, for locking the buffer queue by the second packing device；
Interface reading submodule, reading interface for being provided by the second packing device by the buffer queue is from the buffer queue
Multi-medium data after reading coding.
Preferably, the data source may include camera and/or microphone, and the multi-medium data may include video
Data and/or audio data；
The multi-medium data acquisition module includes：
Video data acquiring submodule, for acquiring video counts from camera by preset camera source class CameraSource
According to；
And/or
Audio data collecting submodule, for acquiring audio data from microphone by preset audio-source class AudioSource.
The embodiment of the invention also discloses a kind of record devices of multimedia file, including：
Recording tool creation module, in the recording request for receiving multimedia file, creation data source, to be beaten encoder
Packet device, the first writer, the second writer；
Multi-medium data acquisition module, for passing through data source continuous collecting multi-medium data；
Coding module, for persistently being encoded to the multi-medium data by encoder；
Multi-medium data after coding is packaged into multi-medium data packet for being continued by packing device by packetization module, and by institute
It states multi-medium data packet and preset buffer queue is written；
First package module for reading multi-medium data packet from the buffer queue by the first writer, and is written more than first
Media file；
File size judgment module, for judging whether first multimedia file is more than preset file size threshold value；If
It is then to call the second package module；
Second package module reads multi-medium data packet from the buffer queue for switching to the second writer, and is written the
Two multimedia files.
Preferably, first package module includes：
It encapsulates completion event and generates submodule, be used for when first multimedia file is more than preset file size threshold value,
First writer generates encapsulation completion event；
It encapsulates completion event and broadcasts submodule, for broadcasting the encapsulation completion event by the first writer.
Preferably, the file size judgment module includes：
Completion event judging submodule is encapsulated, event is completed by the encapsulation of the first writer broadcast for judging whether to receive；
If so, encapsulation is called to complete judging submodule；
Judging submodule is completed in encapsulation, for judging that first multimedia file is more than preset file size threshold value.
Preferably, second package module includes：
Stop submodule, for stopping the first writer, meanwhile, the first writer carries out at preservation first multimedia
Reason；
Promoter module, for starting the second writer；
Second reading submodule, for reading the multi-medium data packet from the buffer queue by the second writer.
Preferably, the buffer queue is configured with mutual exclusion lock, and second package module includes：
Submodule is discharged, for discharging the buffer queue by the first writer；
Submodule is locked, for locking the buffer queue by the second writer；
Interface reading submodule, reading interface for being provided by the second writer by the buffer queue is from the buffer queue
Read the multi-medium data packet.
Preferably, the data source may include camera and/or microphone, and the multi-medium data may include video
Data and/or audio data；
The multi-medium data acquisition module includes：
Video data acquiring submodule, for acquiring video counts from camera by preset camera source class CameraSource
According to；
And/or
Audio data collecting submodule, for acquiring audio data from microphone by preset audio-source class AudioSource.
The embodiment of the present invention includes following advantages：
The embodiment of the present invention configures two multimedia writers, and the multi-medium data of data source continuous collecting is persistently encoded
And be stored in buffer queue, when the first multimedia writer, which encapsulates the first multimedia file, to be completed, switch to more than second matchmaker
Body writer carries out the encapsulation of the second multimedia file, and in handoff procedure, the recordings such as data source, encoder tool can continue
It works normally, avoids the closing for recording tool according to source, encoder etc. in switching, and then avoid data after handover
Source, encoder etc. record the initialization operation of tool, ensure that and continue working in switching, avoid the blank of recording, realize
Seamless continuous recording.
Multiplexing and encoding device of the embodiment of the present invention, the handoff procedure pair of the first multimedia writer and the second multimedia writer
Buffer queue that is transparent, being protected by mutual exclusion lock for data source, encoder, ensure that the first multimedia writer and
Data of the second multimedia writer in switching are synchronous.
The embodiment of the present invention configures two writers, the multi-medium data of data source continuous collecting is persistently encoded,
It is packaged, and is stored in buffer queue, when the first writer, which encapsulates the first multimedia file, to be nearly completed, switch to second and write
Enter the encapsulation that device carries out the second multimedia file, in handoff procedure, data source, encoder, packing device etc. record tool can be with
It is lasting to work normally, the closing for recording tool according to source, encoder, packing device etc. in switching is avoided, and then avoid
Data source, encoder, packing device etc. record the initialization operation of tool after switching, ensure that and continue working in switching, avoid
The blank recorded, realizes seamless continuous recording.
The handoff procedure of multiplexing packing device of the embodiment of the present invention, the first writer and the second writer is for data source, volume
It is buffer queue that is transparent, being protected by mutual exclusion lock for code device, packing device, ensure that the first writer and the second writer
Data in switching are synchronous.
Detailed description of the invention
Fig. 1 is a kind of step flow chart of the method for recording embodiment 1 of multimedia file of the invention；
Fig. 2 is a kind of step flow chart of the method for recording embodiment 2 of multimedia file of the invention；
Fig. 3 is a kind of structural block diagram of the record device embodiment 1 of multimedia file of the invention
Fig. 4 is a kind of structural block diagram of the record device embodiment 2 of multimedia file of the invention.
Specific embodiment
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, with reference to the accompanying drawing and specific real
Applying mode, the present invention is described in further detail.
Referring to Fig.1, a kind of step flow chart of the method for recording embodiment of multimedia file of the invention is shown, specifically
It may include steps of：
Step 101, when receiving the recording request of multimedia file, data source, encoder, packing device, more than first matchmaker are created
Body writer, the second multimedia writer；
It should be noted that the embodiment of the present invention can be applied to the electronic equipment with camera, for example, mobile phone, plate are electric
Brain, intelligent wearable device（Such as smartwatch, intelligent glasses）, automobile data recorder, video monitor etc..
These electronic equipments can support WindowsPhone, Android mostly（Android）, the operation such as IOS, Windows
System can usually run the application of recorded video, such as camera application, realize recording function.
Embodiment in order to enable those skilled in the art to better understand the present invention, in embodiments of the present invention, Android conduct
A kind of example of operating system is illustrated.
A kind of operating system of freedom and open source code based on Linux of Android, can substantially be divided into four
Layer, is application layer respectively from high level to low layer（Applications）, application framework layer（Application
Framework）, system Runtime Library layer（Libraries）With Linux kernel central layer（Linux Kernel）.
Furthermore, android system be Java Virtual Machine Dalvik is increased on linux system, and
The Application Framework of a Java is built on Dalvik virtual machine, application program is based on JAVA
It runs on Application Framework, therefore, can substantially be divided into Application Framework
Java layers and Native layers.
In the concrete realization, the recording request of multimedia file can refer to what user was specified by camera application click
Control（It such as records a video and starts control）Etc. the instruction record a video that issues of modes.
When receiving the recording request of multimedia file, multi-media recording object MediaRecorder can be created, it is more
Media record object MediaRecorder Object Creation multi-media recording Service Instance StageFrightRecorder,
StageFrightRecorde according to from recorded video application receive come setting（Such as coded format）It is created with control message
Data source DataSource, encoder Codec, the first multimedia writer MediaWriter, the second multimedia writer
MediaWriter, i.e. multi-media recording Service Instance StageFrightRecorder can play the part of controller Controller's
Role completes the creation and setting of recording tool.
Specifically, the application of recorded video can realize record in one Java layers of MediaRecorder object of creation
Sound and video recording.
MediaRecorder object is to record service in fact by the recording service module MPS creation of application framework layer
Example --- StageFrightRecorder controls the recording of multimedia file.
Wherein, StagefrightRecorder is the entity object for recording operation of MPS creation.
Interprocess communication is realized by AIDL interface between the application and MPS of recorded video, for camera application and development
Convenient, android system provides packaged help class.
It is realized such as the application of recorded video by MediaRecorder object and MediaRecorderClient and is handed over MPS
Stream.
MediaRecorder object is to represent MPS inside the process space for the application for operating in recorded video,
MediaRecorderClient operates in the application that recorded video is represented inside the multimedia server process space.
It should be noted that in order to realize that warm back-up mechanism, the embodiment of the present invention can be in Native layers of modification controllers
One medium writer MediaWriter of control logic and increase of Controller, increases the control continuously recorded at Java layers
Parameter processed.
Wherein, the first multimedia writer MediaWriter and the second multimedia writer MediaWriter work each other
Multimedia writer MediaWriter and backup multimedia writer MediaWriter.
And in embodiments of the present invention, the first multimedia writer MediaWriter can be written for the multimedia of work
Device MediaWriter, the second multimedia writer MediaWriter can be the multimedia writer MediaWriter of backup.
Android primary multi-media recording frame simplifies setting for packing device Packetizer and writer Writer
Meter synthesizes the function of the two in a multimedia writer MediaWriter.
I.e. in embodiments of the present invention, the first multimedia writer MediaWriter may include the first writer
Writer and the first packing device Packetizer, the second multimedia writer MediaWriter may include the second writer
Writer and the second packing device Packetizer, then the first packing device Packetizer and the second packing device Packetizer is multiplexed
Encoder Codec.
Step 102, pass through data source continuous collecting multi-medium data；
In the concrete realization, data source DataSource may include camera Camera and/or microphone MIC, multimedia number
According to may include video data and/or audio data；
Then in embodiments of the present invention, it can be acquired by preset camera source class CameraSource from camera Camera
Video data, such as yuv data；
And/or
Audio data, such as PCM data can be acquired from microphone MIC by preset audio-source class AudioSource.
Step 103, encoder persistently encodes the multi-medium data, and the multi-medium data after coding is write
Enter preset buffer queue；
The multi-medium data transmission process of recording is message-driven, and data source DataSource generates the message of multi-medium data
By the message queue of injection encoder Codec.
After encoder Codec detects the message, MediaSource can be called（The data source class of Android platform
Type）Read function obtain video data, audio data, encoded according to the coded format of setting, compressed video data,
Audio data is the data of various coded formats.
Wherein, multi-medium data is encoded, is referred to by specific compress technique, such as H.261, H.263, H.264,
The file of some video format is converted into the mode of another video format file.
Multi-medium data after coding can be stored in the buffer queue of an inside by encoder Codec.
Specifically, buffer queue, which provides external object, writes interface（put）With reading interface（read）, encoder
Codec can call this to write interface（put）, buffer queue is written into the multi-medium data after coding.
Step 104, the first multimedia writer from the buffer queue read coding after multi-medium data, and be written the
One multimedia file；
In the concrete realization, the first multimedia writer MediaWriter of work can call the reading interface of buffer queue
（read）, the multi-medium data after encoding is read from buffer queue, according to the output format of setting（Such as MP4,3GP）Encapsulation
First multimedia file.
In one preferred embodiment of the invention, step 104 may include following sub-step：
Sub-step S11, the first packing device read the multi-medium data after encoding from the buffer queue；
Multi-medium data after coding is packaged into multi-medium data packet by sub-step S12, the first packing device；
The first multimedia file is written in the multi-medium data packet by sub-step S13, the first writer；
Sub-step S14, when first multimedia file is more than preset file size threshold value, the first multimedia writer is raw
At encapsulation completion event；
Sub-step S15, the first multimedia writer broadcast the encapsulation completion event.
The first packing device Packetizer reads the code stream of encoder Codec output, is responsible for exporting encoder Codec
Code stream segmentation is packaged, in order to store or transmit.
The multi-medium data packet of first packing device Packetizer packing number is written more than first by the first writer Writer
In media file.
If the first writer Writer is detecting that the first multimedia file is more than file size threshold value, envelope can be generated
Event is installed into, broadcast to controller Controller, notification controller Controller, which has been approached, completes the first multimedia text
The encapsulation of part.
Step 105, judge whether first multimedia file is more than preset file size threshold value；If so, executing
Step 106；
In the concrete realization, controller Controller can decide whether to receive by the first multimedia writer
Event is completed in the encapsulation of MediaWriter broadcast；If so, judging that the first multimedia file is more than preset file size threshold
Value.
Step 106, it switches to the second multimedia writer and reads the multi-medium data after encoding from the buffer queue, and
The second multimedia file is written.
Application warm back-up mechanism of the embodiment of the present invention, if controller Controller knows that the first multimedia file is more than pre-
If file size threshold value, i.e., close to encapsulation complete, can switch to the second multimedia writer MediaWriter carry out second
The encapsulation of multimedia file.
When switching to the second multimedia writer MediaWriter and being packaged, the second multimedia writer
MediaWriter is switched to the multimedia writer of work from the multimedia writer MediaWriter of backup
MediaWriter, the first multimedia writer MediaWriter are switched to from the multimedia writer MediaWriter of work
The multimedia writer MediaWriter of backup.
In one preferred embodiment of the invention, step 106 may include following sub-step：
Sub-step S21 stops the first packing device and the first writer, meanwhile, the first writer carries out first multimedia
Preservation processing；
Sub-step S22 starts the second packing device and the second writer；
Sub-step S23, the second packing device read the multi-medium data after encoding from the buffer queue；
Multi-medium data after coding is packaged into multi-medium data packet by sub-step S24, the second packing device；
The second multimedia file is written in the multi-medium data packet by sub-step S25, the second writer.
First packing device Packetizer, the first writer Writer, the write-in of the second packing device Packetizer and second
Device Writer has the thread of a job.
By closing the thread of the first packing device Packetizer, the first writer Writer work, stop the first write-in
First multimedia writer MediaWriter is switched to stand-by state by the work of device.
Pass through the second packing device Packetizer of starting, the thread of the second writer Writer work, the second write-in of starting
Second multimedia writer MediaWriter is switched to working condition by the work of device.
Second packing device Packetizer continues to read the code stream of encoder Codec output, is responsible for encoder Codec is defeated
Code stream out, which is divided, to be packaged, in order to store or transmit.
Second writer Writer that the second packing device Packetizer is packed multi-medium data packet write-in more than second
In media file.
It certainly, can be with if the second writer Writer is detecting that the second multimedia file is more than file size threshold value
Encapsulation completion event is generated, broadcast to controller Controller, notification controller Controller has been approached completion more than second
The encapsulation of media file switches to the first multimedia writer MediaWriter again and continues to encapsulate.
Specifically, controller Controller sends a stopping message to the first packing device Packetizer, first
Writer Writer can be with when the first packing device Packetizer, the first writer Writer are when receiving the stopping message
The thread of the first packing device Packetizer, the first writer Writer work is closed, meanwhile, the first writer Writer is to the
One multimedia carries out preservation processing, generally comprises the write-in of the first multimedia file, the preservation of head information and closing of a file.
Wherein, head information may include encoded information etc., be used for subsequent broadcasting.
Controller Controller sends an initiation message to the second packing device Packetizer, the second writer
Writer can star when the second packing device Packetizer, the second writer Writer are when receiving the initiation message
The thread of two packing device Packetizer, the second writer Writer work.
It should be noted that the embodiment of the present invention can modify to StageFrightRecorder frame, carrying out
The switching of multimedia writer MediaWriter, that is, close one of multimedia writer MediaWriter, starting it is another
When a multimedia writer MediaWriter, other recording tools are not stopped（That is data source DataSource, encoder
Codec）Work, another multimedia writer MediaWriter starting after, can normally monitor the defeated of encoder Codec
Information out.
Certainly, if listening to recording termination instruction, as user clicks specified control by camera application in user（Such as
Video recording terminates control）, then can stop the work of all recording tools, i.e. controller Controller can send out message informing number
It stops working according to the multimedia writer MediaWriter of source DataSource, encoder Codec and work.
In another preferred embodiment of the invention, the buffer queue be configured with mutual exclusion lock, with to buffer queue into
Row protection.
Specifically, mutual exclusion lock can provide a kind of mutually exclusive method, by the locking and unlocking of thread, to Mr. Yu
One data structure, it is ensured that a certain moment can only have a thread to be able to access that it, i.e., two threads cannot be simultaneously to same mutual
Denounce object locking.
If thread a tries to lock to a Mutex object, and at this time the thread b locked same Mutex object when, line
Journey a will just enter sleep state.
Once thread b releases Mutex object（It can be called by pthread_mutex_unlock ()）, thread a is just
This Mutex object can be locked（That is thread a can be returned from pthread_mutex_lock () function call, simultaneously
Mutex object is locked）.
Similarly, when thread a just locks Mutex object, if thread c tries to lock to Mutex object, thread c
Sleep state will temporarily be entered.
To being locked on locked Mutex object（Pthread_mutex_lock () function call can be called）It is all
Thread will all enter sleep state, and " queuing " is accessed this Mutex object by the thread of these sleeps.
Then in embodiments of the present invention, step 106 may include following sub-step：
Sub-step S31, the first packing device discharge the buffer queue；
Sub-step S32, the second packing device lock the buffer queue；
Sub-step S33, the reading interface that the second packing device is provided by the buffer queue is after buffer queue reading coding
Multi-medium data.
In embodiments of the present invention, buffer queue is protected as Mutex object, the line of the first packing device Packetizer
Journey discharges buffer queue, then the multi-medium data after cannot reading coding from buffer queue, the second packing device Packetizer
Thread locked buffer queue, then can from buffer queue read coding after multi-medium data.
Encoder Codec it is encoded after multi-medium data consumer, i.e. packing device Packetizer（Including
One packing device Packetizer and the second packing device Packetizer）It provides and reads data-interface（read）Realization, i.e., will read
Request read is taken to be mapped to the reading interface of buffer queue（get）On.
In this way, either which packing device Packetizer（Including the first packing device Packetizer and the second packing device
Packetizer）The reading read request of sending can be responded correctly.
Multiplexing and encoding device of the embodiment of the present invention, the handoff procedure pair of the first multimedia writer and the second multimedia writer
Buffer queue that is transparent, being protected by mutual exclusion lock for data source, encoder, ensure that the first multimedia writer and
Data of the second multimedia writer in switching are synchronous.
The embodiment of the present invention configures two multimedia writers, and the multi-medium data of data source continuous collecting is persistently carried out
It encodes and is stored in buffer queue, when the first multimedia writer, which encapsulates the first multimedia file, to be completed, switch to second
Multimedia writer carries out the encapsulation of the second multimedia file, and in handoff procedure, data source, encoder etc. record tool can be with
It is lasting to work normally, the closing for recording tool according to source, encoder etc. in switching is avoided, and then avoid and count after handover
The initialization operation that tool is recorded according to source, encoder etc. ensure that and continue working in switching, avoids the blank of recording, real
Seamless continuous recording is showed.
Referring to Fig. 2, a kind of step flow chart of the method for recording embodiment 2 of multimedia file of the invention is shown, is had
Body may include steps of：
Step 201, when receiving the recording request of multimedia file, creation data source, encoder, packing device, the first write-in
Device, the second writer；
It should be noted that the embodiment of the present invention can be applied to the electronic equipment with camera, for example, mobile phone, plate are electric
Brain, intelligent wearable device（Such as smartwatch, intelligent glasses）, automobile data recorder, video monitor etc..
These electronic equipments can support WindowsPhone, Android mostly（Android）, the operation such as IOS, Windows
System can usually run the application of recorded video, such as camera application, realize recording function.
Embodiment in order to enable those skilled in the art to better understand the present invention, in embodiments of the present invention, Android conduct
A kind of example of operating system is illustrated.
A kind of operating system of freedom and open source code based on Linux of Android, can substantially be divided into four
Layer, is application layer respectively from high level to low layer（Applications）, application framework layer（Application
Framework）, system Runtime Library layer（Libraries）With Linux kernel central layer（Linux Kernel）.
Furthermore, android system be Java Virtual Machine Dalvik is increased on linux system, and
The Application Framework of a Java is built on Dalvik virtual machine, application program is based on JAVA
It runs on Application Framework, therefore, can substantially be divided into Application Framework
Java layers and Native layers.
In the concrete realization, the recording request of multimedia file can refer to what user was specified by camera application click
Control（It such as records a video and starts control）Etc. the instruction record a video that issues of modes.
When receiving the recording request of multimedia file, multi-media recording object MediaRecorder can be created, it is more
Media record object MediaRecorder Object Creation multi-media recording Service Instance StageFrightRecorder,
StageFrightRecorde according to from recorded video application receive come setting（Such as coded format）It is created with control message
Data source DataSource, encoder Codec, the first multimedia writer MediaWriter, the second multimedia writer
MediaWriter, i.e. multi-media recording Service Instance StageFrightRecorder can play the part of controller Controller's
Role completes the creation and setting of recording tool.
Specifically, the application of recorded video can realize record in one Java layers of MediaRecorder object of creation
Sound and video recording.
MediaRecorder object is to record service in fact by the recording service module MPS creation of application framework layer
Example --- StageFrightRecorder controls the recording of multimedia file.
Wherein, StagefrightRecorder is the entity object for recording operation of MPS creation.
Interprocess communication is realized by AIDL interface between the application and MPS of recorded video, for camera application and development
Convenient, android system provides packaged help class.
It is realized such as the application of recorded video by MediaRecorder object and MediaRecorderClient and is handed over MPS
Stream.
MediaRecorder object is to represent MPS inside the process space for the application for operating in recorded video,
MediaRecorderClient operates in the application that recorded video is represented inside the multimedia server process space.
It should be noted that in order to realize that warm back-up mechanism, the embodiment of the present invention can be in Native layers of modification controllers
One medium writer MediaWriter of control logic and increase of Controller, increases the control continuously recorded at Java layers
Parameter processed.
Wherein, the first multimedia writer MediaWriter and the second multimedia writer MediaWriter work each other
Multimedia writer MediaWriter and backup multimedia writer MediaWriter.
And in embodiments of the present invention, the first multimedia writer MediaWriter can be written for the multimedia of work
Device MediaWriter, the second multimedia writer MediaWriter can be the multimedia writer MediaWriter of backup.
Android primary multi-media recording frame simplifies setting for packing device Packetizer and writer Writer
Meter synthesizes the function of the two in a multimedia writer MediaWriter.
I.e. in embodiments of the present invention, the first multimedia writer MediaWriter may include the first writer
Writer and packing device Packetizer, the second multimedia writer MediaWriter may include the second writer Writer
With packing device Packetizer, then the first writer Writer and the second writer Writer is multiplexed packing device Packetizer.
Step 202, pass through data source continuous collecting multi-medium data；
In the concrete realization, data source DataSource may include camera Camera and/or microphone MIC, multimedia number
According to may include video data and/or audio data；
Then in embodiments of the present invention, it can be acquired by preset camera source class CameraSource from camera Camera
Video data, such as yuv data；
And/or
Audio data, such as PCM data can be acquired from microphone MIC by preset audio-source class AudioSource.
Step 203, encoder persistently encodes the multi-medium data；
The multi-medium data transmission process of recording is message-driven, and data source DataSource generates the message of multi-medium data
By the message queue of injection encoder Codec.
After encoder Codec detects the message, MediaSource can be called（The data source class of Android platform
Type）Read function obtain video data, audio data, encoded according to the coded format of setting, compressed video data,
Audio data is the data of various coded formats.
Wherein, multi-medium data is encoded, is referred to by specific compress technique, such as H.261, H.263, H.264,
The file of some video format is converted into the mode of another video format file.
Step 204, packing device continues the multi-medium data after coding being packaged into multi-medium data packet, and will be described more
Preset buffer queue is written in media data packet；
Packing device Packetizer reads the code stream of encoder Codec output, is responsible for the code stream for exporting encoder Codec and divides
It is packaged, in order to store or transmit.
Packed multi-medium data packet can be stored in the buffer queue of an inside by packing device Packetizer.
Specifically, buffer queue, which provides external object, writes interface（put）With reading interface（read）, packing device
Packetizer can call this to write interface（put）, buffer queue is written into packed multi-medium data packet.
Step 205, the first writer reads multi-medium data packet from the buffer queue, and the first multimedia text is written
Part；
In the concrete realization, the first writer Writer of work can call the reading interface of buffer queue（read）, from caching
Multi-medium data packet is read in queue, encapsulates the first multimedia file.
In one preferred embodiment of the invention, step 205 may include following sub-step：
Sub-step S41, when first multimedia file is more than preset file size threshold value, the first writer generates encapsulation
Completion event；
Sub-step S42, the first writer broadcast the encapsulation completion event.
In embodiments of the present invention, if the first writer Writer is detecting that the first multimedia file is more than file size
Threshold value, then can be generated encapsulation completion event, and broadcast to controller Controller, notification controller Controller has been approached
Complete the encapsulation of the first multimedia file.
Step 206, judge whether first multimedia file is more than preset file size threshold value；If so, executing
Step 207；
In the concrete realization, controller Controller can decide whether to receive the envelope broadcasted by the first writer Writer
Install into event；If so, judging that the first multimedia file is more than preset file size threshold value.
Step 207, it switches to the second writer and reads multi-medium data packet from the buffer queue, and more than second matchmaker is written
Body file.
Application warm back-up mechanism of the embodiment of the present invention, if controller Controller knows that the first multimedia file is more than pre-
If file size threshold value, i.e., close to encapsulation complete, can switch to the second writer Writer carry out the second multimedia file
Encapsulation.
When switching to the second writer Writer and being packaged, writer of the second writer Writer from backup
The writer Writer, the first writer Writer that Writer is switched to work switch from the writer writer Writer of work
For the writer Writer of backup.
In one preferred embodiment of the invention, step 207 may include following sub-step：
Sub-step S51 stops the first writer, meanwhile, the first writer carries out preservation processing to first multimedia；
Sub-step S52 starts the second writer；
Sub-step S53, the second writer read the multi-medium data packet from the buffer queue.
First writer Writer and the second writer Writer has the thread of a job.
By closing the thread of the first writer Writer work, stop the work of the first writer Writer, by first
Writer Writer switches to stand-by state.
By the thread of starting the second writer Writer work, start the work of the second writer Writer, by second
Writer MediaWriter switches to working condition.
Second writer Writer continues to read the packed multimedia number of packing device Packetizer from buffer queue
According to packet, and be written in the second multimedia file.
It certainly, can be with if the second writer Writer is detecting that the second multimedia file is more than file size threshold value
Encapsulation completion event is generated, broadcast to controller Controller, notification controller Controller has been approached completion more than second
The encapsulation of media file switches to the first writer Writer again and continues to encapsulate.
Specifically, controller Controller sends a stopping message to the first writer Writer, write when first
Enter device Writer when receiving the stopping message, the thread of the first writer Writer work can be closed, meanwhile, first writes
Enter device Writer and preservation processing is carried out to the first multimedia, generally comprises the write-in of the first multimedia file, the preservation of head information
And closing of a file.
Wherein, head information may include encoded information etc., be used for subsequent broadcasting.
Controller Controller sends an initiation message to the second writer Writer, as the second writer Writer
When receiving the initiation message, the thread of the second writer Writer work can star.
It should be noted that the embodiment of the present invention can modify to StageFrightRecorder frame, carrying out
The switching of writer Writer does not stop when closing one of writer Writer, starting another writer Writer
Other record tool（That is data source DataSource, encoder Codec, packing device Packetizer）Work, another is write
After entering device Writer starting, the output information of packing device Packetizer can be normally monitored.
Certainly, if listening to recording termination instruction, as user clicks specified control by camera application in user（Such as
Video recording terminates control）, then can stop the work of all recording tools, i.e. controller Controller can send out message informing number
It stops working according to the multimedia writer MediaWriter of source DataSource, encoder Codec and work.
In another preferred embodiment of the invention, the buffer queue be configured with mutual exclusion lock, with to buffer queue into
Row protection.
Specifically, mutual exclusion lock can provide a kind of mutually exclusive method, by the locking and unlocking of thread, to Mr. Yu
One data structure, it is ensured that a certain moment can only have a thread to be able to access that it, i.e., two threads cannot be simultaneously to same mutual
Denounce object locking.
If thread a tries to lock to a Mutex object, and at this time the thread b locked same Mutex object when, line
Journey a will just enter sleep state.
Once thread b releases Mutex object（It can be called by pthread_mutex_unlock ()）, thread a is just
This Mutex object can be locked（That is thread a can be returned from pthread_mutex_lock () function call, simultaneously
Mutex object is locked）.
Similarly, when thread a just locks Mutex object, if thread c tries to lock to Mutex object, thread c
Sleep state will temporarily be entered.
To being locked on locked Mutex object（Pthread_mutex_lock () function call can be called）It is all
Thread will all enter sleep state, and " queuing " is accessed this Mutex object by the thread of these sleeps.
Then in embodiments of the present invention, step 207 may include following sub-step：
Sub-step S61, the first writer discharge the buffer queue；
Sub-step S62, the second writer lock the buffer queue；
Sub-step S63, the reading interface that the second writer is provided by the buffer queue read described more from the buffer queue
Media data packet.
In embodiments of the present invention, buffer queue is protected as Mutex object, and the thread of the first writer Writer is released
Buffer queue is put, then cannot read multi-medium data packet from buffer queue, the thread locked of the second writer Writer caches team
Column then can read multi-medium data packet from buffer queue.
Packing device Packetizer is to the consumer of its multi-medium data packet, i.e. writer Writer（Including the first write-in
Device Writer and the second writer Writer）It provides and reads data-interface（read）Realization, i.e., read requests read is mapped
To the reading interface of buffer queue（get）On.
In this way, either which writer Writer（Including the first writer Writer and the second writer Writer）Hair
Read requests read out can be responded correctly.
The handoff procedure of multiplexing packing device of the embodiment of the present invention, the first writer and the second writer is for data source, volume
It is buffer queue that is transparent, being protected by mutual exclusion lock for code device, packing device, ensure that the first writer and the second writer
Data in switching are synchronous.
The embodiment of the present invention configures two writers, the multi-medium data of data source continuous collecting is persistently encoded,
It is packaged, and is stored in buffer queue, when the first writer, which encapsulates the first multimedia file, to be nearly completed, switch to second and write
Enter the encapsulation that device carries out the second multimedia file, in handoff procedure, data source, encoder, packing device etc. record tool can be with
It is lasting to work normally, the closing for recording tool according to source, encoder, packing device etc. in switching is avoided, and then avoid
Data source, encoder, packing device etc. record the initialization operation of tool after switching, ensure that and continue working in switching, avoid
The blank recorded, realizes seamless continuous recording.
It should be noted that for simple description, therefore, it is stated as a series of action groups for embodiment of the method
It closes, but those skilled in the art should understand that, embodiment of that present invention are not limited by the describe sequence of actions, because according to
According to the embodiment of the present invention, some steps may be performed in other sequences or simultaneously.Secondly, those skilled in the art also should
Know, the embodiments described in the specification are all preferred embodiments, and the related movement not necessarily present invention is implemented
Necessary to example.
Referring to Fig. 3, a kind of structural block diagram of the record device embodiment 1 of multimedia file of the invention is shown, specifically
It may include following module：
Recording tool creation module 301, in the recording request for receiving multimedia file, creation data source, encoder,
Packing device, the first multimedia writer, the second multimedia writer；
Multi-medium data acquisition module 302, for passing through data source continuous collecting multi-medium data；
Coding module 303, for persistently being encoded to the multi-medium data by encoder, and by the multimedia after coding
Preset buffer queue is written in data；
First package module 304, for reading the multimedia number after encoding from the buffer queue by the first multimedia writer
According to, and the first multimedia file is written；
File size judgment module 305, for judging whether first multimedia file is more than preset file size threshold value；
If so, calling the second package module 306；
Second package module 306 reads more matchmakers after encoding from the buffer queue for switching to the second multimedia writer
Volume data, and the second multimedia file is written.
In the concrete realization, the first multimedia writer include the first writer and the first packing device, described second
Multimedia writer includes the second writer and the second packing device.
In one preferred embodiment of the invention, first package module 304 may include following submodule：
First reading submodule, for reading the multi-medium data after encoding from the buffer queue by the first packing device；
First is packaged submodule, for the multi-medium data after coding to be packaged into multi-medium data packet by the first packing device；
First write-in submodule, for the first multimedia file to be written in the multi-medium data packet by the first writer.
In another preferred embodiment of the invention, first package module 304 may include following submodule：
It encapsulates completion event and generates submodule, be used for when first multimedia file is more than preset file size threshold value,
First multimedia writer generates encapsulation completion event；
It encapsulates completion event and broadcasts submodule, for broadcasting the encapsulation completion event by the first multimedia writer.
In one preferred embodiment of the invention, the file size judgment module 305 may include following submodule：
Completion event judging submodule is encapsulated, is completed for judging whether to receive by the encapsulation of the first multimedia writer broadcast
Event；If so, encapsulation is called to complete judging submodule；
Judging submodule is completed in encapsulation, for judging that first multimedia file is more than preset file size threshold value.
In one preferred embodiment of the invention, second package module 306 may include following submodule：
Stop submodule, for stopping the first packing device and the first writer, meanwhile, the first writer is to first multimedia
Carry out preservation processing；
Promoter module, for starting the second packing device and the second writer；
Second reading submodule, for reading the multi-medium data after encoding from the buffer queue by the second packing device；
Second is packaged submodule, for the multi-medium data after coding to be packaged into multi-medium data packet by the second packing device；
Second write-in submodule, for the second multimedia file to be written in the multi-medium data packet by the second writer.
In another preferred embodiment of the invention, the buffer queue is configured with mutual exclusion lock, second Encapsulation Moulds
Block 306 may include following submodule：
Submodule is discharged, for discharging the buffer queue by the first packing device；
Submodule is locked, for locking the buffer queue by the second packing device；
Interface reading submodule, reading interface for being provided by the second packing device by the buffer queue is from the buffer queue
Multi-medium data after reading coding.
In a preferred example of an embodiment of the present invention, the data source may include camera and/or microphone, institute
Stating multi-medium data may include video data and/or audio data；
The multi-medium data acquisition module 302 may include following submodule：
Video data acquiring submodule, for acquiring video counts from camera by preset camera source class CameraSource
According to；
And/or
Audio data collecting submodule, for acquiring audio data from microphone by preset audio-source class AudioSource.
Referring to Fig. 4, a kind of structural block diagram of the record device embodiment 2 of multimedia file of the invention is shown, specifically
It may include following module：
Recording tool creation module 401, in the recording request for receiving multimedia file, creation data source, encoder,
Packing device, the first writer, the second writer；
Multi-medium data acquisition module 402, for passing through data source continuous collecting multi-medium data；
Coding module 403, for persistently being encoded to the multi-medium data by encoder；
Multi-medium data after coding is packaged into multi-medium data packet for being continued by packing device by packetization module 404, and will
Preset buffer queue is written in the multi-medium data packet；
First package module 405 for reading multi-medium data packet from the buffer queue by the first writer, and is written first
Multimedia file；
File size judgment module 406, for judging whether first multimedia file is more than preset file size threshold value；
If so, calling the second package module 406；
Second package module 407 reads multi-medium data packet from the buffer queue for switching to the second writer, and is written
Second multimedia file.
In one preferred embodiment of the invention, first package module 405 may include following submodule：
It encapsulates completion event and generates submodule, be used for when first multimedia file is more than preset file size threshold value,
First writer generates encapsulation completion event；
It encapsulates completion event and broadcasts submodule, for broadcasting the encapsulation completion event by the first writer.
In one preferred embodiment of the invention, the file size judgment module 406 may include following submodule：
Completion event judging submodule is encapsulated, event is completed by the encapsulation of the first writer broadcast for judging whether to receive；
If so, encapsulation is called to complete judging submodule；
Judging submodule is completed in encapsulation, for judging that first multimedia file is more than preset file size threshold value.
In one preferred embodiment of the invention, second package module 407 may include following submodule：
Stop submodule, for stopping the first writer, meanwhile, the first writer carries out at preservation first multimedia
Reason；
Promoter module, for starting the second writer；
Second reading submodule, for reading the multi-medium data packet from the buffer queue by the second writer.
In another preferred embodiment of the invention, the buffer queue is configured with mutual exclusion lock, second Encapsulation Moulds
Block 407 may include following submodule：
Submodule is discharged, for discharging the buffer queue by the first writer；
Submodule is locked, for locking the buffer queue by the second writer；
Interface reading submodule, reading interface for being provided by the second writer by the buffer queue is from the buffer queue
Read the multi-medium data packet.
In a preferred example of an embodiment of the present invention, the data source may include camera and/or microphone, institute
Stating multi-medium data may include video data and/or audio data；
The multi-medium data acquisition module 402 may include following submodule：
Video data acquiring submodule, for acquiring video counts from camera by preset camera source class CameraSource
According to；
And/or
Audio data collecting submodule, for acquiring audio data from microphone by preset audio-source class AudioSource.
For device embodiment, since it is basically similar to the method embodiment, related so being described relatively simple
Place illustrates referring to the part of embodiment of the method.
All the embodiments in this specification are described in a progressive manner, the highlights of each of the examples are with
The difference of other embodiments, the same or similar parts between the embodiments can be referred to each other.
It should be understood by those skilled in the art that, the embodiment of the embodiment of the present invention can provide as method, apparatus or calculate
Machine program product.Therefore, the embodiment of the present invention can be used complete hardware embodiment, complete software embodiment or combine software and
The form of the embodiment of hardware aspect.Moreover, the embodiment of the present invention can be used one or more wherein include computer can
With in the computer-usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) of program code
The form of the computer program product of implementation.
The embodiment of the present invention be referring to according to the method for the embodiment of the present invention, terminal device (system) and computer program
The flowchart and/or the block diagram of product describes.It should be understood that flowchart and/or the block diagram can be realized by computer program instructions
In each flow and/or block and flowchart and/or the block diagram in process and/or box combination.It can provide these
Computer program instructions are set to general purpose computer, special purpose computer, Embedded Processor or other programmable data processing terminals
Standby processor is to generate a machine, so that being held by the processor of computer or other programmable data processing terminal devices
Capable instruction generates for realizing in one or more flows of the flowchart and/or one or more blocks of the block diagram
The device of specified function.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing terminal devices
In computer-readable memory operate in a specific manner, so that instruction stored in the computer readable memory generates packet
The manufacture of command device is included, which realizes in one side of one or more flows of the flowchart and/or block diagram
The function of being specified in frame or multiple boxes.
These computer program instructions can also be loaded into computer or other programmable data processing terminal devices, so that
Series of operation steps are executed on computer or other programmable terminal equipments to generate computer implemented processing, thus
The instruction executed on computer or other programmable terminal equipments is provided for realizing in one or more flows of the flowchart
And/or in one or more blocks of the block diagram specify function the step of.
Although the preferred embodiment of the embodiment of the present invention has been described, once a person skilled in the art knows bases
This creative concept, then additional changes and modifications can be made to these embodiments.So the following claims are intended to be interpreted as
Including preferred embodiment and fall into all change and modification of range of embodiment of the invention.
Finally, it is to be noted that, herein, relational terms such as first and second and the like be used merely to by
One entity or operation are distinguished with another entity or operation, without necessarily requiring or implying these entities or operation
Between there are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant meaning
Covering non-exclusive inclusion, so that process, method, article or terminal device including a series of elements not only wrap
Those elements are included, but also including other elements that are not explicitly listed, or further includes for this process, method, article
Or the element that terminal device is intrinsic.In the absence of more restrictions, being wanted by what sentence "including a ..." limited
Element, it is not excluded that there is also other identical elements in process, method, article or the terminal device for including the element.
The recording of the method for recording and a kind of multimedia file of a kind of multimedia file provided by the present invention is filled above
It sets, is described in detail, used herein a specific example illustrates the principle and implementation of the invention, above
The explanation of embodiment is merely used to help understand method and its core concept of the invention；Meanwhile for the general skill of this field
Art personnel, according to the thought of the present invention, there will be changes in the specific implementation manner and application range, in conclusion this
Description should not be construed as limiting the invention.
Claims (8)
1. a kind of method for recording of multimedia file, which is characterized in that including：
When electronic equipment with camera receives the recording request of multimedia file, data source, encoder, more than first are created
Medium writer, the second multimedia writer；
By data source continuous collecting multi-medium data, the data source includes camera and/or microphone, the multimedia number
According to including video data and/or audio data；
Encoder persistently encodes the multi-medium data, and the multi-medium data after coding is written to preset caching
Queue；
First multimedia writer reads the multi-medium data after encoding from the buffer queue, and the first multimedia text is written
Part；
Judge whether first multimedia file is more than preset file size threshold value；It is write if so, closing the first multimedia
Enter device, starts the second multimedia writer；
Second multimedia writer reads the multi-medium data after encoding from the buffer queue, and the second multimedia text is written
Part；
Judge whether second multimedia file is more than preset file size threshold value；It is write if so, closing the second multimedia
Enter device, starts the first multimedia writer.
2. the method according to claim 1, wherein the first multimedia writer include the first writer and
First packing device, the second multimedia writer include the second writer and the second packing device.
3. according to the method described in claim 2, it is characterized in that, the first multimedia writer is read from the buffer queue
Multi-medium data after taking coding, and the step of the first multimedia file is written includes：
First packing device reads the multi-medium data after encoding from the buffer queue；
Multi-medium data after coding is packaged into multi-medium data packet by the first packing device；
The first multimedia file is written in the multi-medium data packet by the first writer.
4. method according to claim 1 or 3, which is characterized in that the first multimedia writer is from the caching team
Column read the multi-medium data after coding, and the step of the first multimedia file is written includes：
When first multimedia file is more than preset file size threshold value, the first multimedia writer generates encapsulation and completes
Event；
First multimedia writer broadcasts the encapsulation completion event.
5. according to the method described in claim 4, it is characterized in that, described judge whether first multimedia file is more than pre-
If file size threshold value the step of include：
Judge whether to receive and event is completed by the encapsulation of the first multimedia writer broadcast；If so, judging more than described first
Media file is more than preset file size threshold value.
6. according to method described in Claims 2 or 3 or 5, which is characterized in that the second multimedia writer that switches to is from institute
It states buffer queue and reads the multi-medium data after coding, and the step of the second multimedia file is written includes：
Stop the first packing device and the first writer, meanwhile, the first writer carries out preservation processing to first multimedia；
Start the second packing device and the second writer；
Second packing device reads the multi-medium data after encoding from the buffer queue；
Multi-medium data after coding is packaged into multi-medium data packet by the second packing device；
The second multimedia file is written in the multi-medium data packet by the second writer.
7. according to method described in Claims 2 or 3 or 5, which is characterized in that the buffer queue is configured with mutual exclusion lock, described
Switching to the step of the second multimedia writer reads the multi-medium data after encoding from the buffer queue includes：
First packing device discharges the buffer queue；
Second packing device locks the buffer queue；
Second packing device reads the multimedia number after encoding from the buffer queue by the interface of reading that the buffer queue provides
According to.
8. a kind of record device of multimedia file, which is characterized in that including：
Recording tool creation module, when for receiving the recording request of multimedia file in the electronic equipment with camera,
Create data source, encoder, the first multimedia writer, the second multimedia writer；
Multi-medium data acquisition module, for by data source continuous collecting multi-medium data, the data source to include camera
And/or microphone, the multi-medium data include video data and/or audio data；
Coding module, for persistently being encoded to the multi-medium data by encoder, and by the multimedia number after coding
According to the preset buffer queue of write-in；
First package module, for reading the multi-medium data after encoding from the buffer queue by the first multimedia writer,
And the first multimedia file is written；
File size judgment module, for judging whether first multimedia file is more than preset file size threshold value；If
It is then to close the first multimedia writer, starts the second multimedia writer,
And judge whether second multimedia file is more than preset file size threshold value；If so, closing the second multimedia
Writer starts the first multimedia writer；
Second package module reads the multi-medium data after encoding from the buffer queue for the second multimedia writer, and
The second multimedia file is written.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810646022.3A CN108848406B (en) | 2015-07-27 | 2015-07-27 | Method and device for recording multimedia file |
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| CN201810646022.3A CN108848406B (en) | 2015-07-27 | 2015-07-27 | Method and device for recording multimedia file |
| CN201510447305.1A CN105049919B (en) | 2015-07-27 | 2015-07-27 | A kind of method for recording and device of multimedia file |
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| CN201810646664.3A Active CN108650545B (en) | 2015-07-27 | 2015-07-27 | Method and device for recording multimedia file |
| CN201810646022.3A Active CN108848406B (en) | 2015-07-27 | 2015-07-27 | Method and device for recording multimedia file |
| CN201510447305.1A Active CN105049919B (en) | 2015-07-27 | 2015-07-27 | A kind of method for recording and device of multimedia file |
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| CN107800988A (en) * | 2017-11-08 | 2018-03-13 | 青岛海信移动通信技术股份有限公司 | A kind of method and device of video record, electronic equipment |
| CN111755017B (en) * | 2020-07-06 | 2021-01-26 | 全时云商务服务股份有限公司 | Audio recording method and device for cloud conference, server and storage medium |
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| CN108881770A (en) | 2018-11-23 |
| CN108881770B (en) | 2021-01-05 |
| CN108848406B (en) | 2020-11-24 |
| CN108650545A (en) | 2018-10-12 |
| CN105049919A (en) | 2015-11-11 |
| CN108650545B (en) | 2021-01-19 |
| CN105049919B (en) | 2018-07-31 |
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