CN107093436A - The storage method and device of the audio, video data pre-recorded, mobile terminal - Google Patents
The storage method and device of the audio, video data pre-recorded, mobile terminal Download PDFInfo
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- CN107093436A CN107093436A CN201710144329.9A CN201710144329A CN107093436A CN 107093436 A CN107093436 A CN 107093436A CN 201710144329 A CN201710144329 A CN 201710144329A CN 107093436 A CN107093436 A CN 107093436A
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- audio
- video data
- recorded
- fifo buffer
- recording
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Classifications
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/10527—Audio or video recording; Data buffering arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/7605—Television signal recording on discs or drums
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/78—Television signal recording using magnetic recording
- H04N5/781—Television signal recording using magnetic recording on disks or drums
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/10527—Audio or video recording; Data buffering arrangements
- G11B2020/1062—Data buffering arrangements, e.g. recording or playback buffers
- G11B2020/10629—Data buffering arrangements, e.g. recording or playback buffers the buffer having a specific structure
- G11B2020/10638—First-in-first-out memories [FIFO] buffers
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B20/10527—Audio or video recording; Data buffering arrangements
- G11B2020/1062—Data buffering arrangements, e.g. recording or playback buffers
- G11B2020/10675—Data buffering arrangements, e.g. recording or playback buffers aspects of buffer control
- G11B2020/10722—Data buffering arrangements, e.g. recording or playback buffers aspects of buffer control wherein the size of the buffer is variable, e.g. by adding additional memory cells for coping with input streams that have high bit rates
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
- G11B20/10—Digital recording or reproducing
- G11B2020/10935—Digital recording or reproducing wherein a time constraint must be met
- G11B2020/10953—Concurrent recording or playback of different streams or files
Abstract
The present invention provides the storage method and device, mobile terminal of a kind of audio, video data pre-recorded, and wherein storage method comprises the following steps：Before record command is received, the audio, video data pre-recorded using parameter of pre-recording is write in fifo buffer；The space size of fifo buffer is by duration and the parameter calculating determination of pre-recording of pre-recording；Parameter of pre-recording includes resolution ratio and frame per second, and/or, code check；When receiving record command, if write time earliest audio, video data is not Video Key frame data in fifo buffer, audio, video data is deleted.Because the earliest data of write time in fifo buffer are key frame data, so audio, video data is encapsulated as after multimedia file, the one-frame video data one in multimedia file is set to key frame data；When multimedia file is played, be not in because playing non-video key frame data the mosaic phenomenon that occurs, it is to avoid be detained influence of the mosaic on human eye vision.
Description
Technical field
The present invention relates to audio-video collection technical field, more particularly to a kind of storage method for the audio, video data pre-recorded,
Storage device and a kind of include the mobile terminal of foregoing storage device.
Background technology
To meet application demand, many mobile terminals with audio-video collection function have pre- recording function, will can use
N second audio, video datas before family performs recording operation are preserved temporarily, and will be foregoing N seconds when user performs recording operation
Audio, video data is stored as multimedia file.Because having pre- recording function, aforementioned mobile terminal can avoid user's operating delay from causing
Crucial audio, video data missing.Exemplified by carrying out illegal evidence recording with the law-enforcing recorder of pre- recording function：In law enforcement people
Before the actual triggering of member is recorded, illegal activities may have occurred and that；And now law-enforcing recorder such as opens pre- recording function, enforce the law people
When member's triggering is recorded, the audio, video data of N second can be saved before triggering is recorded, and be used as proof illegal activities evidence.
But, a part pre-records the multimedia file to be formed in broadcasting, and video image beginning is mosaic；Due to
Be detained influence of the mosaic on human eye vision, user can not can be clearly seen that the video image in a period of time after mosaic.
The content of the invention
The multimedia file to be formed is pre-recorded in broadcasting to solve a part, video image beginning shadow for mosaic
The problem of ringing user's vision, the present invention provides a kind of storage method for the audio, video data pre-recorded in mobile terminal, storage device
With include the mobile terminal of foregoing storage device.
The present invention provides a kind of storage method for the audio, video data pre-recorded in mobile terminal, comprises the following steps：
Before record command is received, the audio, video data pre-recorded using parameter of pre-recording is write in fifo buffer；
The space size of the fifo buffer is by duration and the parameter calculating determination of pre-recording of pre-recording；The parameter of pre-recording including resolution ratio and
Frame per second, and/or, code check；
When receiving record command, if write time earliest audio, video data is not video in the fifo buffer
Key frame data, then delete the audio, video data.
Optionally, methods described is applied in android system, and the audio, video data pre-recorded is by android system
In Mediacodec interfaces encode to be formed.
Optionally, voice data is AAC formatted datas, and/or, video data is H264 formatted datas.
Optionally, methods described is applied in android system, and methods described also includes：
Using the MediaMuxer interfaces in android system, the audio, video data in the fifo buffer is encapsulated
For multimedia file.
Optionally, the multimedia file is the file of MP4 forms.
The present invention provides a kind of storage device for the audio, video data pre-recorded in mobile terminal, including：Writing unit and delete
Except unit；
Said write unit is used for before record command is received, and the audio, video data pre-recorded using parameter of pre-recording is write
Enter in fifo buffer；The space size of the fifo buffer is by duration and the parameter calculating determination of pre-recording of pre-recording；It is described to pre-record
Parameter includes resolution ratio and frame per second, and/or, code check；
When receiving record command, the deletion unit is used for the earliest sound of the write time in the fifo buffer
When video data is not Video Key frame data, the audio, video data is deleted.
The present invention provides a kind of mobile terminal based on android system, including foregoing storage device, described to deposit
The audio, video data pre-recorded in storage device is encoded by Mediacodec interfaces and formed.
Optionally, in the audio, video data pre-recorded, voice data is AAC formatted datas, and/or, video data is
H264 formatted datas.
Optionally, the audio, video data in the fifo buffer is multimedia file by MediaMuxer interface encapsulations.
Optionally, the multimedia file is the file of MP4 forms.
The storage method for the audio, video data pre-recorded in the mobile terminal that the present invention is provided, the ginseng of pre-recording set according to user
Number and duration of pre-recording set the storage size of fifo buffer, and the audio, video data pre-recorded using parameter of pre-recording is stored in
Into fifo buffer；When receiving record command, if write time earliest audio, video data is in fifo buffer
Non-key frame video data and/or audio frame number evidence, then by this non-key frame video data and/or audio frame number according to deleting, it is straight
It is key frame video data to write time earliest data.Now, because the earliest data of write time in fifo buffer are
Key frame video data, so after the audio, video data in fifo buffer is encapsulated as into multimedia file, multimedia file
In one-frame video data one be set to key frame video data；Be not in mosaic phenomenon when multimedia file is played,
Avoid be detained influence of the mosaic on human eye vision.In addition, because the capacity of fifo buffer is according to pre-recording that user sets
Parameter and the duration setting of pre-recording estimated, so practical application request can preferably be met.
Brief description of the drawings
To be illustrated more clearly that background technology or technical scheme, below to prior art or embodiment
The accompanying drawing of middle combined use is briefly described；It should be evident that below in conjunction with the accompanying drawing side of being only for of embodiment
Just understand the embodiment of the present invention, for those of ordinary skill in the art, on the premise of not paying creative work, may be used also
To obtain other accompanying drawings according to these accompanying drawings；
Fig. 1 is the storage method flow chart for the audio, video data pre-recorded in mobile terminal provided in an embodiment of the present invention；
Fig. 2 is the storage device flow chart for the audio, video data pre-recorded in mobile terminal provided in an embodiment of the present invention；
Fig. 3 is mobile terminal structure schematic diagram provided in an embodiment of the present invention；
Wherein：The audio, video data storage device pre-recorded in 1- mobile terminals, 11- writing units, 12-FIFO buffers,
13- deletes unit, 2- sound pick-ups, 3- cameras, 4-Mediacodec interfaces, 5-MediaMuxer interfaces.
Embodiment
In order that those skilled in the art more fully understand the technical scheme in the present invention, below in conjunction with of the invention real
The accompanying drawing in example is applied, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described implementation
Example only a part of embodiment of the invention, rather than whole embodiments.Based on the embodiment in the present invention, this area is common
The every other embodiment that technical staff is obtained under the premise of creative work is not made, should all belong to protection of the present invention
Scope.
Fig. 1 is the storage method flow chart for the audio, video data pre-recorded in mobile terminal provided in an embodiment of the present invention.Please
Referring to Fig. 1, the storage method for the audio, video data pre-recorded in the mobile terminal of the present embodiment comprises the following steps.It should note herein
Meaning, the storage method of audio, video data provided in an embodiment of the present invention can be applicable to the various movements with audio-video collection function
In terminal；In practical application, mobile terminal is preferably the equipment such as law-enforcing recorder, drive recorder, smart mobile phone or video camera.
S101：Pre-recorded audio, video data using parameter of pre-recording.
Mobile terminal is opened and is set after pre- recording function, and camera and sound pick-up therein are to proceed by data acquisition
Operation, obtains video sampling data and audio sampling data respectively；Then, the coding module in mobile terminal is by video sampling number
Encoded according to audio sampling data according to preset rules, form pre-recorded videos data to be stored and voice data of pre-recording.
Foregoing parameter of pre-recording can be the resolution ratio and frame per second, the resolution ratio of sound pick-up and frame per second of camera, directly can also be regarded for sound
The code check of frequency evidence.
By taking the mobile terminal using Android operation system as an example：The video sampling data of camera collection are transported to
While mobile terminal preview display screen is exported, the preview callback interface in android system obtains video sampling Data Concurrent
Give Mediacodec interfaces；Video sampling data encoding is corresponding video data by Mediacodec interfaces, for
Follow-up storage.Wherein, method for video coding can be the coding staffs known in the art such as H261, H263, H264, M-JPEG and MPEG
Any one in method, the embodiment of the present invention is simultaneously not specifically limited；Consider on the premise of equal image quality, H264 codings
The compression ratio of method is higher than the compression ratio of other coding methods, so the embodiment of the present invention is preferred to use android system recommendation
H264 coding methods.
Similar, the audio samples of sound pick-up collection are sampled to form audio sampling data, audio sampling data
Mediacodec interfaces are sent to, to pass through the voice data of Mediacodec interfaces formation coding.Wherein, audio coding side
Method can be any one in the coding methods known in the art such as MP3, AAC, MPEG-1, and the embodiment of the present invention, which is not also done, to be had
Body is limited；Consider under the conditions of identical tonequality, the compression ratio of AAC coding methods is higher than the compression ratio of other coding methods, institute
It is preferred to use the AAC coding methods of android system recommendation with the embodiment of the present invention.
S102：The audio, video data pre-recorded is written to fifo buffer.
Mobile terminal is opened and is set after pre- recording function, i.e., a FIFO (First Input First are opened up in internal memory
Output) buffer, fifo buffer is used to cache foregoing audio, video data to be pre-recorded.The space size root of fifo buffer
Determined according to the parameter of pre-recording set in pre-record duration and the S101 of audio, video data to be pre-recorded, to guarantee storage user's setting
Pre-record the audio, video data of duration.
It should be noted that in fifo buffer, voice data and video data carry out mixing according to acquisition time order and deposited
Storage, to ensure the two time synchronized.
For ease of subsequent zone multi-voice frequency data and video data, audio, video data, which is written to before fifo buffer, first does object
Change processing, the data object for forming serializability.The gauge outfit of the data object of serializability includes medium type, media information,
Data division is aforementioned audio data or video data；Wherein：Medium type is divided into two kinds of video and audio, respectively for foregoing
Video data and voice data；Media information includes timestamp information, length information and attribute information, timestamp information storage
The recording time of data object, the size of length information data storage object, attribute information store whether corresponding data are pass
Key frame data.It shall yet further be noted that herein whether be key frame data only for video data for.
During concrete application, according to the difference of mobile terminal opening time, fifo buffer is in different working conditions：
(1) the mobile terminal opening time be less than pre-record duration when because the capacity of fifo buffer be more than stored audio, video data,
Still there is free memory, so when subsequent sound video data transmitting delivers to fifo buffer, fifo buffer is directly stored subsequently
Audio, video data.(2) the mobile terminal opening time is more than or equal to when pre-recording duration, fifo buffer memory space whole quilts
Take；To store the audio, video data of nearest preset duration, fifo buffer can delete the audio, video data obtained earliest, vacate
Enough memory spaces, and newest obtained audio, video data is stored to the corresponding address of deleted audio, video data.
S103：When receiving record command, judge the earliest audio, video data of write time in fifo buffer whether be
Video Key frame data；If it is, performing S105；If it is not, then performing S104.
S104：Write time earliest audio, video data is deleted, S103 is returned.
S105：Audio, video data in fifo buffer is encapsulated as multimedia file, and by multimedia file store to
Memory.
According to the difference for receiving record command opportunity, it is stored in the sound that in fifo buffer and the write time is earliest and regards
Frequency, according to that may be Video Key frame data, may be video non-key frame data, it is also possible to be audio frame number evidence, specifically can root
Judge to obtain according to Table Header information in serializability object.
If earliest audio, video data is not Video Key frame data the write time in fifo buffer, by this data
Delete, up to write time earliest data are Video Key frame data.Now, because in fifo buffer the write time it is earliest
Data are Video Key frame data, so after the audio, video data in fifo buffer is encapsulated as into multimedia file, many matchmakers
One-frame video data one in body file is set to key frame of video data；When multimedia file is played, it will not be opened in broadcasting
There is mosaic phenomenon in end, it is to avoid be detained influence of the mosaic on human eye vision.In addition, because the capacity root of fifo buffer
Pre-record parameter and the duration setting of pre-recording estimated set according to user, so practical application request can preferably be met.
Still by taking the mobile terminal using Android operation system as an example, in S105 is performed, mobile terminal is available
Audio, video data is encapsulated as multimedia file by the MediaMuxer interfaces in android system.Specifically, multimedia file can
To be stored as the file of known various forms, but it is preferably stored as MP4 formatted files.
In addition to the storage method that the foregoing audio, video data pre-recorded is provided, the embodiment of the present invention also provide one kind realize it is foregoing
The storage device of method.
Fig. 2 is the storage device flow chart for the audio, video data pre-recorded in mobile terminal provided in an embodiment of the present invention.Please
Referring to Fig. 2, the storage device 1 of audio, video data pre-recorded in the mobile terminal that the present embodiment is provided include writing unit 11,
Fifo buffer 12, deletion unit 13.
Fifo buffer 12 is used to store the audio, video data pre-recorded；When the space size of fifo buffer 12 is according to pre-recording
Long and parameter determination of pre-recording, parameter of pre-recording can be the resolution ratio and frame per second, the resolution ratio of voice data and frame per second of video data,
Or the code check of video data and audio data coding.
Writing unit 11 is used for before record command is received, and the audio, video data pre-recorded according to parameter of pre-recording is write
Into fifo buffer 12；Deleting unit 13 is used for when receiving record command, and judges to write in fifo buffer 12
When time earliest audio, video data is not Video Key frame data, foregoing audio, video data is deleted, until entry time is earliest
Data be Video Key frame data.
The embodiment of the present invention also provides a kind of mobile terminal based on android system.Fig. 3 is that the embodiment of the present invention is provided
Mobile terminal structure schematic diagram, such as Fig. 3, this mobile terminal include camera 3, sound pick-up 2 and Mediacodec interfaces 4.Take the photograph
As first 3 are used to gather video data, sound pick-up 2 is used to gather voice data, and Mediacodec interfaces 4 are used to adopt camera 3
The audio sampling data that the video sampling data encoding integrated gathers as video data, by sound pick-up 2 is encoded to voice data.
Wherein, the method for video coding that Mediacodec interfaces 4 are used can for H261, H263, H264, M-JPEG and
Any one in the coding method known in the art such as MPEG, the embodiment of the present invention is simultaneously not specifically limited, it is preferable to employ
The H264 coding methods that android system is recommended.The audio coding method that Mediacodec interfaces 4 are used can for MP3, AAC,
Any one in the coding method known in the art such as MPEG-1, the embodiment of the present invention also and is not specifically limited, but is preferably adopted
The AAC coding methods recommended with android system.
Further, as shown in figure 3, the audio, video data in fifo buffer 12 can be in android system
The encapsulation of MediaMuxer interfaces 5 forms multimedia file；In addition, the packed multimedia file formed is preferably MP4 forms
File.
The storage method of the audio, video data in the embodiment of the present invention, storage device and mobile terminal have been carried out in detail above
It is thin to introduce.This part is set forth using specific embodiment to the principle and embodiment of the present invention, and above example is said
The bright core concept for being only intended to help to understand the present invention, without departing from the principles of the present invention, ordinary skill
The every other embodiment that personnel are obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
Claims (10)
1. the storage method for the audio, video data pre-recorded in a kind of mobile terminal, it is characterised in that comprise the following steps：
Before record command is received, the audio, video data pre-recorded using parameter of pre-recording is write in fifo buffer；Institute
The space size of fifo buffer is stated by duration and the parameter calculating determination of pre-recording of pre-recording；The parameter of pre-recording includes resolution ratio and frame
Rate, and/or, code check；
When receiving record command, if write time earliest audio, video data is not Video Key in the fifo buffer
Frame data, then delete the audio, video data.
2. according to the method described in claim 1, it is characterised in that：
Methods described is applied in android system, and the audio, video data pre-recorded is in android system
Mediacodec interfaces encode to be formed.
3. method according to claim 2, it is characterised in that in the audio, video data pre-recorded：
Voice data is AAC formatted datas, and/or, video data is H264 formatted datas.
4. according to the method described in claim 1, it is characterised in that methods described is applied in android system, methods described
Also include：
Using the MediaMuxer interfaces in android system, the audio, video data in the fifo buffer is encapsulated as many
Media file.
5. method according to claim 4, it is characterised in that：
The multimedia file is the file of MP4 forms.
6. a kind of storage device for the audio, video data pre-recorded in mobile terminal, it is characterised in that including：Writing unit and deletion
Unit；
Said write unit is used for before record command is received, and the audio, video data pre-recorded using parameter of pre-recording is write
In fifo buffer；The space size of the fifo buffer is by duration and the parameter calculating determination of pre-recording of pre-recording；The ginseng of pre-recording
Number includes resolution ratio and frame per second, and/or, code check；
When receiving record command, the deletion unit is used for the earliest audio frequency and video of the write time in the fifo buffer
When data are not Video Key frame data, the audio, video data is deleted.
7. a kind of mobile terminal based on android system, it is characterised in that：Including storage device as claimed in claim 6,
The audio, video data pre-recorded in the storage device is encoded by Mediacodec interfaces and formed.
8. mobile terminal according to claim 7, it is characterised in that：
In the audio, video data pre-recorded, voice data is AAC formatted datas, and/or, video data is H264 form numbers
According to.
9. mobile terminal according to claim 7, it is characterised in that：
Audio, video data in the fifo buffer is multimedia file by MediaMuxer interface encapsulations.
10. mobile terminal according to claim 9, it is characterised in that：
The multimedia file is the file of MP4 forms.
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| CN110572722A (en) * | 2019-09-26 | 2019-12-13 | 腾讯科技（深圳）有限公司 | Video clipping method, device, equipment and readable storage medium |
| CN110572722B (en) * | 2019-09-26 | 2021-04-16 | 腾讯科技（深圳）有限公司 | Video clipping method, device, equipment and readable storage medium |
| CN113392036A (en) * | 2020-03-11 | 2021-09-14 | 深圳星火半导体科技有限公司 | Solid-state memory and data writing method and device thereof |
| CN113392036B (en) * | 2020-03-11 | 2024-02-02 | 深圳星火半导体科技有限公司 | Solid-state memory and data writing method and device thereof |
| CN114598918A (en) * | 2022-05-10 | 2022-06-07 | 浪潮通信技术有限公司 | Method and system for intercepting audio and video clips in alarm message |
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