CN103841326A - Video recording method and device - Google Patents
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- CN103841326A CN103841326A CN201410066422.9A CN201410066422A CN103841326A CN 103841326 A CN103841326 A CN 103841326A CN 201410066422 A CN201410066422 A CN 201410066422A CN 103841326 A CN103841326 A CN 103841326A
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Abstract
The invention is suitable for the technical field of communication, and provides a video recording method and device. The video recording method includes the recording mode switching step and the coding step, wherein the recording mode switching step includes the step of starting a rapid switching recording mode, a video data input source of a video module serves as a screen display module in the rapid switching recording mode, and the coding step includes the steps of initializing a coder, creating a video thread, conducting data coding on preview data output by the screen display module, and generating a video file. In this way, according to the video recording method and device, a user can rapidly switch a plurality of cameras in the video recording process in the rapid switching recording mode.
Description
Technical field
The present invention relates to communication technical field, relate in particular to a kind of method and device thereof of multi-cam switching video shooting.
Background technology
Referring to Fig. 1, existing video recording framework as shown in Figure 1: camera(camera) be divided into two independently data channel after collecting data, one for the preview of finding a view, another is for the coding of recording a video.Preview data is delivered to Surface Flinger(screen display module) rear and other GUI(Graphical User Interface, graphical user interface) icon is superimposed and delivers to HW Composer(Hardware Composer, hardware designs device) synthesize, finally delivering to LCD (Liquid Crystal Display, liquid crystal display) shows.Video recording data are first delivered to Media Recorder (picture recording module), picture recording module can be called encoder Encoder (coding module) module of bottom, the YUV(Luminance Chrominance Chroma that Encoder module collects Camera, color space) data compression becomes MPEG-4 or AVC(Advanced Video Coding, advanced video coding) video code flow of form, video code flow is delivered to File Muxer(file and is mixed) module package becomes video file that player can play as 3gpp or mp4 form.
The device of existing video shooting can comprise multiple cameras, in the time of video shooting, can switch different cameras and take.Under certain application scenarios, user need to obtain the wider visual angle of finding a view to meet user's needs.The Party(that for example celebrates a birthday party) time, user opens rear camera facing to friend's shooting on the scene, also want to regard as memory with work oneself photographing in video simultaneously, that user can allow rear camera facing to oneself video recording by rotating mobile, but now user cannot see the preview of screen, cannot determine that whether camera lens has aimed at oneself and more cannot see the expression of oneself, has caused great inconvenience to user like this.Now user may select second method: first stop the video recording of rear camera, and then be switched to front camera and restart video recording.Again for example taking 360 degree when distant view photograph, user needs rotating mobile or human body spin three-sixth turn to carry out comprehensive data acquisition just to obtain the distant view photograph of 360 degree.
By the analysis of above-mentioned application scenarios, known user adopts the mode of rotating mobile to obtain wider finding a view when visual angle, due to cannot determine camera lens whether aimed at the object that will take also cannot preview to the concrete condition of object, user experiences very poor.Certainly rotating camera replaces the technology of rotating mobile to address this problem, but current large absolutely number mobile phone can not be accomplished this point.
If user wants to obtain wider finding a view when visual angle by switching front camera and rear camera, after switching camera, cause the data source of picture recording module input that change (front camera and rear camera is two different data sources) has occurred, resolution generally also can different (such as becoming 720p from 1080p), and the change of data source and resolution must reinitialize picture recording module.So video recording before now must first stopping, comprise the thread that stops recording a video, close the process such as encoder, releasing resource, then restart one section of new video recording, comprise reset picture recording module input source, reinitialize encoder, re-create video recording thread and reopen a new file and write coded data.Visible, switching front camera and rear camera flow process complexity can cause consuming time longer.Two separately storages of file worse, and user wishes to be kept in same file, departs from user's original intention, even if can merge by post-production, but operation is also very loaded down with trivial details.
In summary, in actual use, obviously there is inconvenience and defect in the technology of existing multi-cam video shooting, so be necessary to provide a kind of technical scheme, makes user can switch fast different cameras, to obtain the wider visual angle of finding a view.
Summary of the invention
For above-mentioned defect, the object of the present invention is to provide a kind of method of video shooting.
To achieve these goals, the invention provides a kind of method of video shooting, comprising:
Screening-mode switch step, starts and switches fast screening-mode, and under described quick switching screening-mode, the video recording input data source of picture recording module is screen display module;
Coding step, initialization codes device and establishment video recording thread, carry out data encoding to the preview data of screen display module output, generates video file.
According to described method, described method also comprises:
Camera switch step, switches to the camera of current shooting in the process of second camera by the first camera, suspends described encoder and described video recording thread;
Recovering step, in the time completing described the first camera and switch to described second camera, recovers described encoder and described video recording thread.
According to described method, described method also comprises:
Pattern switch step, is switched to conventional screening-mode by described quick switching screening-mode, and under conventional screening-mode, the video recording input data source of picture recording module is shooting service module.
According to described method, the resolution of the screen that the resolution of described video file is described screen display module.
According to described method, described camera is arranged at filming apparatus; Described filming apparatus comprises front panel, rear board, left panel and right panel;
Described camera comprises four, being arranged at respectively in described front panel, rear board, left panel and right panel of each described camera; Or
Described camera comprises two, and each camera is arranged at respectively on described front panel and rear board.
The present invention also provides a kind of device of video shooting, comprising:
Screening-mode switch unit, for starting quick switching screening-mode, under described quick switching screening-mode, the video recording input data source of picture recording module is screen display module;
Coding unit, for initialization codes device and establishment video recording thread, carries out data encoding to the preview data of screen display module output, generates video file.
According to described device, described device also comprises:
Camera switch unit, for the process the camera of current shooting is switched to second camera by the first camera, suspends described encoder and described video recording thread;
Recovery unit, in the time completing described the first camera and switch to described second camera, recovers described encoder and described video recording thread.
According to described device, described device also comprises:
Mode switch element, for described quick switching screening-mode is switched to conventional screening-mode, under conventional screening-mode, the video recording input data source of picture recording module is shooting service module.
According to described device, the resolution of the screen that the resolution of described video file is described screen display module.
According to described device, described device comprises front panel, rear board, left panel and right panel;
Described camera comprises four, and each described camera is arranged at respectively in described front panel, rear board, left panel and right panel; Or
Described camera comprises two, and each described camera is arranged at respectively on described front panel and rear board.
The present invention, by screening-mode switch step, starts and switches fast screening-mode, and under described quick switching screening-mode, the preview data of exporting using Surface Flinger is as the input data of picture recording module.Switching fast under screening-mode, before and after camera switches, the input source of picture recording module and the size of sampling can not change, and that has saved that factor data source and change resolution bring reinitializes encoder and re-create the process of video recording thread.In video process, user can be switched different cameras repeatedly, has realized the quick seamless handoff of multi-cam in shooting process.
Accompanying drawing explanation
Fig. 1 is video recording framework schematic diagram of the prior art;
Fig. 2 is the apparatus structure schematic diagram of the video shooting that provides of first embodiment of the invention;
Fig. 3 is the apparatus structure schematic diagram of the video shooting that provides of second and third embodiment of the present invention;
Fig. 4 is the video recording framework schematic diagram that first embodiment of the invention provides;
Fig. 5 is the method flow diagram of the video shooting that provides of fourth embodiment of the invention;
Fig. 6 is the method flow diagram of the video shooting that provides of one embodiment of the invention.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
Referring to Fig. 2 and Fig. 4, in the first embodiment of the present invention, provide a kind of device 100 of video shooting, comprising:
Screening-mode switch unit 10, for starting quick switching screening-mode, under described quick switching screening-mode, the video recording input data source of picture recording module is screen display module;
In this embodiment, the screening-mode of the device 100 of video shooting has comprised quick switching screening-mode; In addition, also retained original normal conventional screening-mode.Screening-mode switch unit 10 has started after quick switching screening-mode accepting user instruction, and the video recording input data source of picture recording module has just become screen display module.Switching under screening-mode and taking fast, the video recording data of input picture recording module are exactly the data of screen display module output.Switching fast under screening-mode, if switched between multiple cameras, because different cameras is two different data sources, resolution generally also can be different, can cause collected by camera to data change, the data of shooting service module output also can change, but the resolution of the data of screen display module output is always the resolution of preview screen and can not changes, therefore, switching fast under screening-mode, before and after multiple cameras switch, the video recording data of input picture recording module can not change, the resolution of video recording data is still the resolution of preview screen.The device 100 of video shooting can be cuboid, comprises front panel, rear board, left panel and right panel, and described camera can comprise four, and each described camera is arranged at respectively in described front panel, rear board, left panel and right panel; Or described camera comprises two, and each camera is arranged at respectively on described front panel and rear board.Certainly can also comprise the camera of other numbers and setting position.Video shooting under described quick switching screening-mode, the preview data that screen display module can be exported is as the input data of picture recording module, no longer from Camera Service(shooting service module) direct reading out data.Thus, even if user is switched camera, because not changing, the input source of picture recording module is always Surface Flinger(screen display module), the resolution of the preview data of screen display module output is also invariable, in the time switching camera video recording, do not need to stop like this video recording, do not need to reinitialize encoder, do not need to re-create video recording thread yet yet.Then, coding unit 20 initialization codes devices and establishment video recording thread, be recorded as video recording data by the preview data of described screen display module output, and described preview data is carried out to data encoding, generates video file.The resolution of the described video file obtaining is the resolution of the screen of described screen display module.For example, the resolution of the screen of current described screen display module is 1080P, and the resolution of the described video file generating is also 1080P.And can be because of carrying out after the switching of the camera that two resolution is different, the resolution of the video file of taking is changed.By technique scheme, user can, switching under screening-mode and carry out the quick switching between multiple cameras fast, can obtain the wider visual angle of finding a view.
Referring to Fig. 3, in the second embodiment of the present invention, the device 100 of described video shooting also comprises:
Camera switch unit 30, for the process the camera of current shooting is switched to second camera by the first camera, suspends described encoder and described video recording thread;
Recovery unit 40, in the time completing described the first camera and switch to described second camera, recovers described encoder and described video recording thread.
In this embodiment, user is in the quick process of switching video shooting under screening-mode, selecting to switch different cameras takes, in user's video process, if desired switch camera and directly click camera switching push button, camera switch unit 30 is being switched to the camera of current shooting in the process of second camera by the first camera, the Camera Service(service module of making a video recording) can experience once stop preview and reopen the process of preview, this process is very of short duration, be input to Surface Flinger(screen display module) data content in handoff procedure, there will be one section of blank, the preview data of screen display module output also there will be one section of blank, for preventing that this section of blank content recorded into video file, in the time that user clicks camera switching push button, camera switch unit 30 is being switched to the camera of current shooting in the process of second camera by the first camera, suspend described encoder and described video recording thread, in the time completing camera switching, again by recovery unit 40 recover to record a video thread and recover encoder.Thus, switching under screening-mode fast, switch forward and backward camera video recording or switch other differences towards camera while taking, do not need to stop video recording, do not need to reinitialize encoder yet, do not need to re-create video recording thread yet.User can arbitrarily repeatedly be switched different cameras in video process, and the file of video recording can be kept in same video file.In the time taking 360 degree distant view photograph, user does not need to do the rotation of 360 degree yet, for the device 100 of video shooting only include former and later two towards camera time, only need by switching fast under screening-mode quick seamless handoff front camera and rear camera and direction rotation smaller angle to the left and right, can obtain the vision of finding a view of 360 degree, bring great convenience to the photo that pans.Certainly, the device 100 of video shooting comprises when setting position is the camera in Si Ge orientation, front, rear, left and right, can carry out the shooting of 360 degree distant view photographs by the camera that switches different setting positions.Rotate and do without user's body, or filming apparatus is done and rotated.
Referring to Fig. 3, in the third embodiment of the present invention, the device 100 of described video shooting also comprises:
Mode switch element 60, for described quick switching screening-mode is switched to conventional screening-mode, under conventional screening-mode, the video recording input data source of picture recording module is shooting service module.
In this embodiment, can carry out according to user's demand the switching of different screening-modes.The instruction that mode switch element 60 is accepted user is switched to described quick switching screening-mode after conventional screening-mode, and the video recording input data source of picture recording module switches to shooting service module (Camera Service) by screen display module.Thus, recover conventional shoot function.
In above-mentioned multiple embodiment, multiple unit of the device 100 of video shooting can be software unit, hardware cell or the software and hardware combining unit that is built in the device 100 of multi-cam switching video shooting.It can be mobile phone, PDA(Personal Digital Assistant that multi-cam switches the device 100 of video shooting, personal digital assistant), palmtop PC etc.
Referring to Fig. 5, in the fourth embodiment of the present invention, also provide a kind of method of video shooting, comprising:
In step S501, start and switch fast screening-mode, under described quick switching screening-mode, the video recording input data source of picture recording module is screen display module; This step is screening-mode switch step, is realized by screening-mode switch unit 10;
In step S502, initialization codes device and establishment video recording thread, carry out data encoding to the preview data of screen display module output, generates video file.This step is coding step, is realized by coding unit 20.
In this embodiment, user, screening-mode is switched to after quick switching screening-mode, in the time switching fast under screening-mode video shooting, the video recording input data source of picture recording module is screen display module.Coding unit 20 initialization codes devices and establishment video recording thread, be recorded as video recording data by the preview data of screen display module output, and described preview data carried out to data encoding, generates video file.Because video recording input data source is screen display module, the resolution of the screen that the resolution of the described video file therefore obtaining is described screen display module.
In the fifth embodiment of the present invention, described method also comprises:
The camera of current shooting is switched in the process of second camera by the first camera, suspend described encoder and described video recording thread; This step is camera switch step, is realized by camera switch unit 30;
Completing when described the first camera is switched to described second camera, recover described encoder and described video recording thread.This step is recovering step, is realized by recovery unit 40.
In the sixth embodiment of the present invention, described method also comprises:
Described quick switching screening-mode is switched to conventional screening-mode, and under conventional screening-mode, the video recording input data source of picture recording module is shooting service module.This step is pattern switch step, is realized by mode switch element 60.
In this embodiment, user can be according to the needs of himself, will switch fast screening-mode and be switched to conventional screening-mode, and under conventional screening-mode, the input source of video recording data is shooting service module.Preferably, described camera is arranged at filming apparatus; This filming apparatus can be the device 100 of video shooting, and described filming apparatus comprises front panel, rear board, left panel and right panel; The device 100 of this video shooting can be cuboid or cube etc., and it has multiple panels.Described camera comprises four, being arranged at respectively in described front panel, rear board, left panel and right panel of each described camera.What can make thus four cameras is 360 degree towards entirety.Can take by being arranged at the camera of diverse location like this scenery and/or the personage of different directions.In addition, described camera can also comprise two, and each camera is arranged at respectively on described front panel and rear board.According to user's setting, the shooting direction of each camera is respectively forward and backward, is convenient to user and carries out the shooting of multi aspect images.Switching fast under screening-mode, user is in the time that the device 100 of opening video shooting utilizes camera capture video, when thering are former and later two cameras, go oneself also photographing same video the inside if want, do not need again rotating mobile, only need to click front camera and rear camera switching push button is switched to front camera, just can between former and later two cameras, switch fast, the preview screen that can see oneself can not interrupted again previous video recording, if user does not want to take oneself, can be switched to again rear camera and continue to take.Certainly, the camera number of the device 100 of video shooting can also be other numbers, for example 3, according to user's the camera that diverse location need to be set, when video shooting, according to taking, need can be by the shooting direction of camera down or upward.
Referring to Fig. 6, in one embodiment of the invention, provide a kind of method of video shooting, specifically describe as follows:
In step S701, judge current whether for switching fast screening-mode, if perform step S702; If not perform step S703;
In step S702, the input source that switches picture recording module is SurfaceFlinger module;
In step S703, carry out normal video recording process; Carry out conventional video recording process;
In step S704, initialization codes device, establishment video recording thread
In step S705, judge whether to switch camera, if perform step S706; If not perform step S709;
In step S706, suspend video recording thread, encoder;
In step S707, judge to have switched whether complete, if perform step S708; If not return to step S707;
In step S708, recover video recording thread, encoder;
In step S709, data encoding, generates video file;
In step S710, judge whether to stop video recording;
In step S711, close encoder, stop the thread of recording a video
In step S712, disconnect the data source of input.
In this embodiment, entering after quick switching screening-mode, by screening-mode switch unit 10, Media Recorder(picture recording module is set) input source of module is Surface Flinger(screen display module) module, coding unit 20 is by Surface Flinger(screen display module) yuv data of module output is input to Media Recorder(picture recording module) module, and disconnect Media Recorder(picture recording module) module and the Camera Service(service module of making a video recording) be connected.User is switched in the process of recording a video under screening-mode quick, if desired switch camera and directly click camera switching push button, in the process of switching at camera, Camera Service can experience the process that once stops preview and reopen preview, this process is very of short duration, the output content of Surface Flinger module there will be one section of blank in handoff procedure, for preventing that this section of blank content recorded into video file, in handoff procedure, need camera switch unit 30 to suspend video recording thread and suspend encoder.In the time that camera has switched completely again by recovery unit 40 recover to record a video thread and recover encoder.
In said process, switching fast under screening-mode, owing to switching before and after camera, all that input source using Surface Flinger as picture recording module does not change, the data of input picture recording module do not change, and reset input source, reinitialize encoder and re-create the processes such as video recording thread so saved.User can switched under screening-mode and repeatedly freely switch multiple cameras fast, and the video of recording all will be kept in same video.The resolution of described video file is the resolution of the screen of described screen display module.Therefore, the video of video recording is differentiated size and is determined by the resolution sizes of preview screen, rather than the resolution decision of the front camera and rear camera of user's selection, because the data of input now come from the data of Surface Flinger output.For 1080p and following screen resolution, existing encoder can be satisfied the demand completely.Such as, for the mobile phone of 1080p resolution screen, the video of recording under quick switching screening-mode is the video of 1080p resolution, and for the mobile phone of 720p resolution screen, the video of recording under quick switching screening-mode is the video of 720p resolution.Finally, in the time that user exits quick switching screening-mode and enters other normal modes again, switch back Camera Serive by mode switch element 60 data source of recording a video, do not affect the use of other normal functions of camera.
In sum, the present invention is by being switched to quick switching screening-mode, the preview data of exporting using Surface Flinger when video shooting, as the input data of picture recording module, makes user under quick switching screening-mode, switch fast multiple cameras and take.Because the input source of picture recording module and the size of sampling can not change, that has saved that factor data source and change resolution bring reinitializes encoder and re-creates the process of video recording thread.In recording a video under quick switching screening-mode, user can be switched different cameras repeatedly, and the file of video recording is kept in same video file, has realized the quick seamless handoff of multi-cam.
Certainly; the present invention also can have other various embodiments; in the situation that not deviating from spirit of the present invention and essence thereof; those of ordinary skill in the art are when making according to the present invention various corresponding changes and distortion, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
Claims (10)
1. a method for video shooting, is characterized in that, comprising:
Screening-mode switch step, starts and switches fast screening-mode, and under described quick switching screening-mode, the video recording input data source of picture recording module is screen display module;
Coding step, initialization codes device and establishment video recording thread, carry out data encoding to the preview data of screen display module output, generates video file.
2. method according to claim 1, is characterized in that, described method also comprises:
Camera switch step, switches to the camera of current shooting in the process of second camera by the first camera, suspends described encoder and described video recording thread;
Recovering step, in the time completing described the first camera and switch to described second camera, recovers described encoder and described video recording thread.
3. method according to claim 1, is characterized in that, described method also comprises:
Pattern switch step, is switched to conventional screening-mode by described quick switching screening-mode, and under conventional screening-mode, the video recording input data source of picture recording module is shooting service module.
4. method according to claim 1, is characterized in that, the resolution of the screen that the resolution of described video file is described screen display module.
5. method according to claim 2, is characterized in that, described camera is arranged at filming apparatus; Described filming apparatus comprises front panel, rear board, left panel and right panel;
Described camera comprises four, being arranged at respectively in described front panel, rear board, left panel and right panel of each described camera; Or
Described camera comprises two, and each camera is arranged at respectively on described front panel and rear board.
6. a device for video shooting, is characterized in that, comprising:
Screening-mode switch unit, for starting quick switching screening-mode, under described quick switching screening-mode, the video recording input data source of picture recording module is screen display module;
Coding unit, for initialization codes device and establishment video recording thread, carries out data encoding to the preview data of screen display module output, generates video file.
7. device according to claim 6, is characterized in that, described device also comprises:
Camera switch unit, for the process the camera of current shooting is switched to second camera by the first camera, suspends described encoder and described video recording thread;
Recovery unit, in the time completing described the first camera and switch to described second camera, recovers described encoder and described video recording thread.
8. device according to claim 6, is characterized in that, described device also comprises:
Mode switch element, for described quick switching screening-mode is switched to conventional screening-mode, under conventional screening-mode, the video recording input data source of picture recording module is shooting service module.
9. device according to claim 6, is characterized in that, the resolution of the screen that the resolution of described video file is described screen display module.
10. want the device described in 7 according to right, it is characterized in that, described device comprises front panel, rear board, left panel and right panel;
Described camera comprises four, and each described camera is arranged at respectively in described front panel, rear board, left panel and right panel; Or
Described camera comprises two, and each described camera is arranged at respectively on described front panel and rear board.
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| CN109413344A (en) * | 2018-10-26 | 2019-03-01 | 北京计算机技术及应用研究所 | Multiresolution screen operator state monitoring apparatus based on video acquisition and coding techniques |
| CN114584686A (en) * | 2020-11-30 | 2022-06-03 | 华为技术有限公司 | Video shooting method and electronic equipment |
| CN115278048A (en) * | 2020-11-30 | 2022-11-01 | 华为技术有限公司 | Video shooting method and electronic equipment |
| CN115278048B (en) * | 2020-11-30 | 2023-08-22 | 华为技术有限公司 | Video shooting method and electronic equipment |
| CN114584686B (en) * | 2020-11-30 | 2023-11-14 | 华为技术有限公司 | Video shooting method and electronic equipment |
| CN113422903A (en) * | 2021-06-16 | 2021-09-21 | 荣耀终端有限公司 | Photographing mode switching method, photographing mode switching apparatus, storage medium, and program product |
| CN118524276A (en) * | 2024-07-19 | 2024-08-20 | 荣耀终端有限公司 | Image processing method and related device |
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