CN105141869A - Android system based segmented video data processing method - Google Patents
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Abstract
The invention discloses an Android system based segmented video data processing method. The method comprises a first step of collecting video frame data and audio frame data synchronously; a second step of coding the data through a hardware encoder; a third step of transmitting the coded data and a timestamp thereof to a segmented video module; a fourth step of writing the video frame data and audio frame data corresponding to the timestamp in a multi-media file; a fifth step of judging whether the time of the multi-media file reaches a preset maximum time, if yes, saving the multi-media file, if not, maintaining the fourth step; and a sixth step of creating a new multi-media file, using the last video frame of the previous multi-media file as a first video frame, and skipping to the fourth step. Through adoption of the method, time is not lost in the process, each frame is controlled strictly in recording of an MP4 file, so that the last frame of the previous video is definitely the first frame of the next video, and the two video files are consecutive.
Description
Technical field
The present invention relates to the audio, video data collection of android system, particularly relate to a kind of segmentation Video data processing method based on android system.
Background technology
The API(application programming interfaces of android system) facilitate easy-to-use, but from reducing the degree of freedom of exploitation another aspect.Such as use android system API to develop segmentation recording function, first must open multi-media recording device record multimedia file, then close multi-media recording device, then reopen multi-media recording device and record next section of multimedia file.So, a period of time must be lost to reopening between multi-media recording device at closedown multi-media recording device, make two sections of multimedia files discontinuous, the time of losing between these two sections of multimedia files can reach 1 to 3 seconds more than, and this time of losing may be the key point that accident occurs, bring great inconvenience to follow-up solving a case.
Summary of the invention
For solving the problems of the technologies described above, the object of this invention is to provide a kind of segmentation Video data processing method based on android system.
The technical solution used in the present invention is:
Based on the segmentation Video data processing method of android system, comprise the following steps: (A) synchronous acquisition video requency frame data and audio frame number certificate; (B) by hardware coder, described video requency frame data and audio frame number certificate are encoded; (C) by coding after video requency frame data and audio frame number according to and timestamp be transferred to segmentation picture recording module; (D) by video requency frame data corresponding for timestamp and audio frame number according to write multimedia file; (E) judge the maximum the duration whether duration of described multimedia file reaches default, if reach maximum duration, preserve multimedia file and enter next step, otherwise keep step (D); (F) newly-built multimedia file, adopts last frame of video of last multimedia file as the first frame of video, jumps to step (D).
Further, in described step (A), video requency frame data and audio frame number certificate gather from android system intermediate layer.
Further, the video requency frame data form gathered in described step (A) is YV12, and the form in step (B) after hardware coder coding is H264 video requency frame data.
Further, the audio frame data format gathered in described step (A) is PCM, and the form in step (B) after hardware coder coding is AAC audio frame number certificate.
Wherein, described step multimedia file is MP4 multimedia file.
Beneficial effect of the present invention:
The segmentation Video data processing method that the present invention is based on android system can gather audio frequency and video always, can not drop-out time in its piecewise acquisition video process, then each frame of strict control in the process recording into MP4 multimedia file, making the last frame of video the last period must be the first frame of rear one section of video, be therefore continuous print between two sections of video files.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described further.
Fig. 1 is the hardware frame figure of segmentation Video data of the present invention process;
Fig. 2 is the fundamental diagram of video data acquiring and coding module;
Fig. 3 is the fundamental diagram of audio data collecting and coding module;
Fig. 4 is the specific embodiment flow chart of segmentation Video data processing method of the present invention.
Embodiment
As shown in Figure 1, for segmentation Video data processing method of the present invention based on the hardware frame of android system, comprise three modules: video data acquiring and coding module, audio data collecting and coding module, segmentation picture recording module.
Wherein, video data acquiring part gathers the video requency frame data of high frame per second from android system intermediate layer, video requency frame data form is YV12, then, be H264 video requency frame data video requency frame data by hardware coder hard coded, finally, H264 video requency frame data is passed to segmentation picture recording module, as Fig. 2 together with timestamp.
Video data acquiring part gathers audio frame number certificate from android system intermediate layer, audio frame data format is PCM(pulse code modulation), then, audio frame number according to being encoded to AAC(Advanced Audio Coding) audio frame number certificate, finally, AAC audio frame number according to passing to segmentation picture recording module, as Fig. 3 together with timestamp.
As shown in Figure 4, segmentation picture recording module mainly realizes a H264 frame of video and AAC audio frame number certificate, using the timestamp of frame of video as synchronously, records into the function of multistage continuous print MP4 multimedia file.
Segmentation picture recording module steps flow chart is as follows:
(1), judge whether segmentation video recording terminates.If terminate, then close the MP4 multimedia file handle opened, then perform (6).If do not terminate, then perform (2).
(2), data are received.If the data received are video requency frame datas, then perform (3).Otherwise the data received are audio frame number certificates, then audio frame number certificate is cached in audio frame data list.
(3), judge whether to there is the MP4 multimedia file handle opened.The MP4 multimedia file handle opened if do not exist, then open new MP4 multimedia file handle, then performs (4).If there is the MP4 multimedia file handle opened, then directly perform (4).
(4), video requency frame data be written in MP4 multimedia file, and the last frame of video be written in MP4 multimedia file is taken out to the audio frame data segment that the timestamp of this frame of video is corresponding from cache list, in write MP4 multimedia file.Then (5) are performed.
(5), judge that the duration of MP4 multimedia file has reached the maximum duration of setting.If reached maximum duration, then close MP4 multimedia file handle (preservation), reopen a new MP4 multimedia file handle, last frame of video in previous step (4) is write as the first frame of video in new MP4 multimedia file handle, then perform (1).If do not reach maximum duration, directly perform (1).
(6) segmentation video recording, is terminated.
As mentioned above, the segmentation Video data processing method that the present invention is based on android system can gather audio frequency and video always, can not drop-out time in its piecewise acquisition video process, then each frame of strict control in the process recording into MP4 multimedia file, making the last frame of video the last period must be the first frame of rear one section of video, be therefore continuous print between two sections of video files.
The foregoing is only preferred embodiments of the present invention, the present invention is not limited to above-mentioned execution mode, as long as the technical scheme realizing the object of the invention with basic same approach all belongs within protection scope of the present invention.
Claims (5)
1. based on the segmentation Video data processing method of android system, it is characterized in that, comprise the following steps: (A) synchronous acquisition video requency frame data and audio frame number certificate; (B) by hardware coder, described video requency frame data and audio frame number certificate are encoded; (C) by coding after video requency frame data and audio frame number according to and timestamp be transferred to segmentation picture recording module; (D) by video requency frame data corresponding for timestamp and audio frame number according to write multimedia file; (E) judge the maximum the duration whether duration of described multimedia file reaches default, if reach maximum duration, preserve multimedia file and enter next step, otherwise keep step (D); (F) newly-built multimedia file, adopts last frame of video of last multimedia file as the first frame of video, jumps to step (D).
2. the segmentation Video data processing method based on android system according to claim 1, is characterized in that: in described step (A), video requency frame data and audio frame number are according to gathering from android system intermediate layer.
3. the segmentation Video data processing method based on android system according to claim 1, it is characterized in that: the video requency frame data form gathered in described step (A) is YV12, the form in step (B) after hardware coder coding is H264 video requency frame data.
4. the segmentation Video data processing method based on android system according to claim 1, it is characterized in that: the audio frame data format gathered in described step (A) is PCM, the form in step (B) after hardware coder coding is AAC audio frame number certificate.
5. the segmentation Video data processing method based on android system according to claim 1, is characterized in that: described multimedia file is MP4 multimedia file.
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| CN106131432A (en) * | 2016-08-10 | 2016-11-16 | 深圳市金立通信设备有限公司 | A kind of video capture method and terminal |
| CN106341636A (en) * | 2016-09-29 | 2017-01-18 | 珠海全志科技股份有限公司 | Android system-based continuous recording system and method |
| CN107147931A (en) * | 2017-04-28 | 2017-09-08 | 青岛海信电器股份有限公司 | The method for recording and device of audio, video data |
| 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 |
| CN108184162A (en) * | 2017-12-07 | 2018-06-19 | 深圳微步信息股份有限公司 | A kind of automatic segmentation kinescope method and system based on Android system |
| CN108521551A (en) * | 2018-05-14 | 2018-09-11 | 河北远东通信系统工程有限公司 | A kind of network real-time video recording and storing method and system and file access pattern method |
| CN110784652A (en) * | 2019-11-15 | 2020-02-11 | 北京达佳互联信息技术有限公司 | Video shooting method and device, electronic equipment and storage medium |
| CN111356003A (en) * | 2020-03-11 | 2020-06-30 | 北京文香信息技术有限公司 | Data writing method, system and terminal equipment |
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