CN104010197A - Method and device for generating video thumbnails - Google Patents
Method and device for generating video thumbnails Download PDFInfo
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- CN104010197A CN104010197A CN201410263987.6A CN201410263987A CN104010197A CN 104010197 A CN104010197 A CN 104010197A CN 201410263987 A CN201410263987 A CN 201410263987A CN 104010197 A CN104010197 A CN 104010197A
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Abstract
The embodiment of the invention discloses a method and device for generating video thumbnails. The method for generating the video thumbnails is applied to first equipment, and the first equipment is used for generating the thumbnails for videos in second equipment. The method includes the steps that video files to be processed are obtained from the second equipment; video key frames are positioned in the obtained video files to be processed; the video key frames are processed to generate the video thumbnails in a preset format. According to the technical scheme, the first equipment which is good in system openness and can support various audio and video decoding libraries is introduced to decode video files in various video formats, so that the video thumbnails of various video files are obtained.
Description
Technical field
The present invention relates to multimedia processing technology field, particularly a kind of video thumbnail generation method and device.
Background technology
Along with the fast development of digital multimedia technology, the video resource of magnanimity has enriched people's entertainment life, and video resource is downloaded, stores and watched to increasing user's choice for use mobile device.Mobile device can pass through the mode of display video thumbnail, helps user and effectively manages the video resource in mobile device.
In prior art, the media library that mobile device can carry by in-local system, scans local video file, obtains the video thumbnails of this video file with this.
But, the media library carrying due to mobile device operation system can only be supported the video file of some particular video formats, carry for mobile device operation system the video file that media library is not supported, use media library scanning can not obtain the video thumbnails of this video file.
Summary of the invention
In order to address the above problem, the embodiment of the invention discloses a kind of video thumbnail generation method and device, concrete technical scheme is as follows:
A kind of video thumbnail generation method, is applied to the first equipment, and described the first equipment is for the video generating video thumbnail for the second equipment, and the method comprises:
From the second equipment, obtain pending video file;
From obtained pending video file, positioning video key frame;
This key frame of video is processed, generated the video thumbnails of default form.
Preferably, describedly from the second equipment, obtain pending video file, comprising:
Determine the target video file in the second equipment, from described the second equipment, read this complete target video file, as pending video file;
Or,
Determine the target video file in the second equipment, from the second equipment, read the fragment of this target video file, as pending video file.
Preferably, described from obtained pending video file, positioning video key frame, comprising:
Obtained pending video file is decoded;
From decoded result, the key frame of video in default moment of location.
Preferably, described from obtained pending video file, positioning video key frame, comprising:
From obtained pending video file, the key frame of video data in default moment of location;
To described key frame of video decoding data, obtain key frame of video.
Preferably, the described default moment comprises: acquiescence moment and alternative moment;
Described from obtained pending video file, the key frame of video data in default moment of location, comprising:
From obtained pending video file, the key frame of video data in location acquiescence moment;
In the case of the key frame of video data in acquiescence moment locate failed, locate the key frame of video data in alternative moment.
Preferably, described described key frame of video is processed, is generated the video thumbnails of default form, comprising:
Described key frame of video is carried out to size change over, and the two field picture after size change over is carried out to format conversion, obtain the video thumbnails of default form;
Or
Described key frame of video is carried out to format conversion, and the two field picture after format conversion is carried out to size change over, obtain the video thumbnails of default form.
Preferential, the connected mode of described the first equipment and the second equipment comprises:
USB connected mode or wireless connections mode.
Preferably, the connected mode of described the first equipment and the second equipment is USB connected mode;
Describedly from the second equipment, obtain pending video file, be specially:
Use Android debugging bridge ADB order from the second equipment, to obtain pending video file.
Preferably, the method also comprises:
Generated video thumbnails is sent to the second equipment, so that the second equipment is preserved and/or shown this video thumbnails.
A kind of video thumbnails generating apparatus, is applied to the first equipment, and described the first equipment is for the video generating video thumbnail for the second equipment, and this device comprises:
Video file acquisition module, for obtaining pending video file from the second equipment;
Key frame locating module, for the pending video file from obtained, positioning video key frame;
Thumbnail generation module, for this key frame of video is processed, generates the video thumbnails of default form.
Preferably, described video file acquisition module, specifically for:
Determine the target video file in the second equipment, from the second equipment, read this complete target video file, as pending video file;
Or,
Determine the target video file in the second equipment, from the second equipment, read the fragment of this target video file, as pending video file.
Preferably, described key frame locating module, comprising:
Video decode submodule, for decoding to obtained pending video file;
Key frame locator module, for from decoded result, locates the key frame of video in default moment.
Preferably, described key frame locating module, comprising:
Frame data locator module, for the pending video file from obtained, the key frame of video data in default moment of location;
Frame data decoding submodule, for to described key frame of video decoding data, obtains key frame of video.
Preferably, the described default moment comprises: acquiescence moment and alternative moment; Described frame data locator module, specifically for from obtained pending video file, the key frame of video data in location acquiescence moment;
In the case of the key frame of video data in acquiescence moment locate failed, locate the key frame of video data in alternative moment.
Preferably, described thumbnail generation module, specifically for:
Described key frame of video is carried out to size change over, and the two field picture after size change over is carried out to format conversion, obtain the video thumbnails of default form;
Or
Described key frame of video is carried out to format conversion, and the two field picture after format conversion is carried out to size change over, obtain the video thumbnails of default form.
Preferably, the connected mode of described the first equipment and the second equipment comprises:
USB connected mode or wireless connections mode.
Preferably, the connected mode of described the first equipment and the second equipment is USB connected mode; Described video file acquisition module, specifically for using Android debugging bridge ADB order to obtain video file from the second equipment.
Preferably, this device also comprises:
Thumbnail sending module, for generated video thumbnails is sent to the second equipment, so that the second equipment is preserved and/or shown this video thumbnails.
The embodiment of the present invention can be installed various audio/video decodings storehouse the first equipment by introducing, thereby realize, the video file of the various video formats in the second equipment is decoded, obtain the video thumbnails of this video file, specific implementation step is as follows: from the second equipment, obtain pending video file; From obtained pending video file, positioning video key frame; Described key frame of video is processed, generated the video thumbnails of default form.
Compared with prior art, due under normal circumstances, the operating system of the second equipment has certain closure, can not install and support the audio/video decoding storehouse of other types, and the operating system of the first equipment is better open in the embodiment of the present invention, multiple audio/video decoding storehouse can be supported, thereby the video thumbnails of various video files can be obtained.
Brief description of the drawings
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
The flow chart of a kind of video thumbnail generation method that Fig. 1 provides for the embodiment of the present invention;
The flow chart of a kind of execution mode of S102 in Fig. 1 that Fig. 2 provides for the embodiment of the present invention;
The flow chart of the another kind of execution mode of S102 in Fig. 1 that Fig. 3 provides for the embodiment of the present invention;
The flow chart of the another kind of video thumbnail generation method that Fig. 4 provides for the embodiment of the present invention;
The structural representation of a kind of video thumbnails generating apparatus that Fig. 5 provides for the embodiment of the present invention;
A kind of structural representation of key frame locating module 202 in Fig. 5 that Fig. 6 provides for the embodiment of the present invention;
The another kind of structural representation of key frame locating module 202 in Fig. 5 that Fig. 7 provides for the embodiment of the present invention;
The structural representation of the another kind of video thumbnails generating apparatus that Fig. 8 provides for the embodiment of the present invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
Along with the fast development of digital multimedia technology and mobile terminal technology, video thumbnails management aspect of video file in mobile terminal device is played the part of more and more important role, user can be by checking the video thumbnails in mobile terminal device, selects own interested video to watch or understand the partial content of video.
At present, the media library that mobile terminal device carries can only be supported the video file of several specific formats, for the video file of not supporting, mobile terminal device can not obtain video thumbnails, user also just can not be by checking the mode of thumbnail, understand the content of this video file, in order to obtain the thumbnail of video file of various forms, present as user to realize mode that the video file of arbitrary format in mobile terminal device can both show by thumbnail, the embodiment of the present invention provides a kind of video thumbnail generation method and device.
First a kind of video thumbnail generation method embodiment of the present invention being provided is below introduced.
It should be noted that, the method that the embodiment of the present invention provides can be applied in the system being made up of the first equipment and the second equipment, in actual applications, this first equipment can be notebook computer, desktop computer etc., this second equipment can be mobile phone, panel computer etc., and the embodiment of the present invention is not construed as limiting this.
As shown in Figure 1, a kind of video thumbnail generation method, is applied to the first equipment, and described the first equipment, for the video generating video thumbnail for the second equipment, can comprise:
S101 obtains pending video file from the second equipment.
In embodiments of the present invention, can determine the target video file in the second equipment, from the second equipment, read the fragment of this target video file, as pending video file.
It should be noted that, the target video file described in the embodiment of the present invention can be the video file of arbitrary format; In the embodiment of the present invention, the fragment of target video file can be understood as the sub-fraction of this video file, and such as 5M, certainly, the user according to actual needs size of the fragment to target video file sets, and the embodiment of the present invention is not construed as limiting this.
In embodiments of the present invention, also can determine the target video file in the second equipment, from the second equipment, read this complete target video file, as pending video file.
Be understandable that, the video file obtaining from the second equipment is less, and reading speed is also just faster, more saves time.
It should be noted that, the connected mode of the first equipment and the second equipment can be: USB connected mode or wireless connections mode; In the time that the connected mode of the first equipment and the second equipment is USB connected mode, can use ADB (Android Debug Bridge, Android debugging bridge) order obtains the fragment of complete object video file or target video file from the second equipment, wherein, ADB is the program of the debugging Android equipment moving equipment that provides of Google, and the order that it comprises has transfer files, obtains the functions such as mobile device information.
S102, from obtained pending video file, positioning video key frame.
In the embodiment of the present invention, key frame of video can be understood as a static picture in video, and this frame is residing that frame of key operations in role or object of which movement or variation.
S103, processes this key frame of video, generates the video thumbnails of default form.
In embodiments of the present invention, although mention in S102: key frame of video is piece image, but under normal circumstances, for the key frame of video of direct generation, its size and form can not meet the demonstration requirement of the first equipment or the second equipment, need thus obtained key frame of video to process, to generate the video thumbnails that meets the first equipment or the second equipment demonstration requirement.
Optionally, can first carry out change in size to key frame of video, then the two field picture after change in size is carried out to format conversion, be met the first equipment or the second equipment and show the video thumbnails requiring;
Certainly, also can first carry out format conversion to key frame of video, then the two field picture after format conversion is carried out to size change over, be met the first equipment or the second equipment and show the video thumbnails requiring; The embodiment of the present invention is not construed as limiting this.
Be understandable that, because different electronic equipments may be better to the video thumbnails display effect of certain form, the embodiment of the present invention can realize by the video thumbnails that generates default form, such as the picture of jpeg format.
The embodiment of the present invention can be installed various audio/video decodings storehouse the first equipment by introducing, thereby realize, the video file of the various video formats in the second equipment is decoded, obtain the video thumbnails of this video file, specific implementation step is as follows: from the second equipment, obtain pending video file; From obtained pending video file, positioning video key frame; Described key frame of video is processed, generated the video thumbnails of default form.
Compared with prior art, due under normal circumstances, the operating system of the second equipment has certain closure, can not install and support the audio/video decoding storehouse of other types, and the operating system of the first equipment is better open in the embodiment of the present invention, multiple audio/video decoding storehouse can be supported, thereby the video thumbnails of various video files can be obtained.
Optionally, in another embodiment of the present invention, obtain pending video file from the second equipment after, can utilize the av_seek_frame function locating key frame of video in FFMPEG storehouse, specific implementation step as shown in Figure 2, can comprise;
S102a, from obtained pending video file, the key frame of video data in default moment of location.
In view of the one-time positioning operation of FFMPEG built-in function, may not can successfully get key frame of video, the embodiment of the present invention can solve this problem by multiple default moment are set; Specific implementation can be: the default moment can be set to be comprised: an acquiescence moment and multiple alternative moment;
Opening the video file obtaining in S101, first FFMPEG built-in function can be attempted the location key frame of video data in acquiescence moment;
In the case of the key frame of video data in acquiescence moment locate failed, can locate the key frame of video data in the first alternative moment; In the case of the key frame of video data in the first alternative moment locate failed, still can continue to locate second, third ... the key frame of video data in alternative moment of N, thus the success rate of positioning video key frame data improved.
Such as, key frame of video data when first FFMPEG built-in function can be attempted obtaining 12 seconds, if obtain the key frame of video data that failure is just obtained 0 second.
It should be noted that, the default moment described in example of the present invention can determine according to empirical value, and certainly, user also can set voluntarily according to actual conditions, and the embodiment of the present invention is not construed as limiting this.
S102b, to key frame of video decoding data, obtains key frame of video.
FFMPEG built-in function can be to the key frame of video decoding data navigating in S102a, thereby obtains corresponding key frame of video.
The method of the positioning video key frame that the embodiment of the present invention the provides useful video requency frame data of only need locating and decode, thus key frame of video can be obtained rapidly.
Optionally, in another embodiment of the present invention, as shown in Figure 3, above-mentioned S102, can comprise:
S102c, decodes to obtained pending video file;
S102d, from decoded result, the key frame of video in default moment of location.
In embodiments of the present invention, can first decode to the pending video file obtaining in S101, obtain corresponding video data, then the video data obtaining from decoding, the key frame of video in default moment of location.
Optionally, in another embodiment of the present invention, as shown in Figure 4, after above-mentioned S103, can also comprise:
S104, sends to the second equipment by generated video thumbnails, so that the second equipment is preserved and/or shown this video thumbnails.
Due to the video file for certain form, the media library that the second device operating system carries can not generate corresponding video thumbnails, now be merely able to generate corresponding video thumbnails by means of the first equipment, and on the first equipment, this video thumbnails preserved or shown.
In embodiments of the present invention, the corresponding video thumbnails generating in the first equipment can be sent to the second equipment, so that the second equipment is preserved this video thumbnails, and needn't all from the first equipment, obtain this video thumbnails at every turn, or all on the first equipment, check this video thumbnails at every turn.
Corresponding to embodiment of the method above, the embodiment of the present invention also provides a kind of video thumbnails generating apparatus.
As shown in Figure 5, a kind of video thumbnails generating apparatus, is applied to the first equipment, and described the first equipment, for the video generating video thumbnail for the second equipment, can comprise:
Video file acquisition module 201, for obtaining pending video file from the second equipment;
Key frame locating module 202, for the pending video file from obtained, positioning video key frame;
Thumbnail generation module 203, for this key frame of video is processed, generates the video thumbnails of default form.
Optionally, described video file acquisition module 201, specifically for:
Determine the target video file in the second equipment, from the second equipment, read this complete target video file, as pending video file;
Or,
Determine the target video file in the second equipment, from the second equipment, read the fragment of this target video file, as pending video file.
Optionally, in another embodiment of the present invention, as shown in Figure 6, described key frame locating module 202, can comprise:
Frame data locator module 202a, for the pending video file from obtained, the key frame of video data in default moment of location;
Frame data decoding submodule 202b, for to described key frame of video decoding data, obtains key frame of video.
Optionally, in an embodiment of the invention, in the described default moment, can comprise: acquiescence moment and alternative moment;
Described frame data locator module 202a, specifically for from obtained pending video file, the key frame of video data in location acquiescence moment;
In the case of the key frame of video data in acquiescence moment locate failed, locate the key frame of video data in alternative moment.
Optionally, in another embodiment of the present invention, as shown in Figure 7, described key frame locating module 202, can comprise:
Video decode submodule 202c, for decoding to obtained pending video file;
Key frame locator module 202d, for from decoded result, locates the key frame of video in default moment.
Optionally, in an embodiment of the invention, described thumbnail generation module 203, specifically for:
Described key frame of video is carried out to size change over, and the two field picture after size change over is carried out to format conversion, obtain the video thumbnails of default form;
Or
Described key frame of video is carried out to format conversion, and the two field picture after format conversion is carried out to size change over, obtain the video thumbnails of default form.
Optionally, the connected mode of described the first equipment and the second equipment, can comprise:
USB connected mode or wireless connections mode.
Optionally, in an embodiment of the invention, be USB connected mode in the connected mode of described the first equipment and the second equipment, described video file acquisition module 201, specifically for using Android debugging bridge ADB order to obtain video file from the second equipment.
Optionally, in another embodiment, as shown in Figure 8, after thumbnail generation module 203, can also comprise: thumbnail sending module 204;
Described thumbnail sending module 204, for generated video thumbnails is sent to the second equipment, so that the second equipment is preserved and/or shown this video thumbnails.
For device embodiment, because it is substantially similar in appearance to embodiment of the method, so description is fairly simple, relevant part is referring to the part explanation of embodiment of the method.
For convenience of description, while describing above device, being divided into various modules with function describes respectively.Certainly, in the time that enforcement is of the present invention, the function of each module can be realized in same or multiple software and/or hardware.
It should be noted that, in this article, relational terms such as the first and second grades is only used for an entity or operation to separate with another entity or operating space, and not necessarily requires or imply and between these entities or operation, have the relation of any this reality or sequentially.And, term " comprises ", " comprising " or its any other variant are intended to contain comprising of nonexcludability, thereby the process, method, article or the equipment that make to comprise a series of key elements not only comprise those key elements, but also comprise other key elements of clearly not listing, or be also included as the intrinsic key element of this process, method, article or equipment.The in the situation that of more restrictions not, the key element being limited by statement " comprising ... ", and be not precluded within process, method, article or the equipment that comprises described key element and also have other identical element.
Each embodiment in this specification all adopts relevant mode to describe, between each embodiment identical similar part mutually referring to, what each embodiment stressed is and the difference of other embodiment.Especially,, for device embodiment, because it is substantially similar in appearance to embodiment of the method, so description is fairly simple, relevant part is referring to the part explanation of embodiment of the method.
One of ordinary skill in the art will appreciate that all or part of step realizing in said method execution mode is can carry out the hardware that instruction is relevant by program to complete, described program can be stored in computer read/write memory medium, here the alleged storage medium obtaining, as: ROM/RAM, magnetic disc, CD etc.
The foregoing is only preferred embodiment of the present invention, be not intended to limit protection scope of the present invention.All any amendments of doing within the spirit and principles in the present invention, be equal to replacement, improvement etc., be all included in protection scope of the present invention.
Claims (18)
1. a video thumbnail generation method, is applied to the first equipment, and described the first equipment is used for the video generating video thumbnail for the second equipment, it is characterized in that, the method comprises:
From the second equipment, obtain pending video file;
From obtained pending video file, positioning video key frame;
This key frame of video is processed, generated the video thumbnails of default form.
2. method according to claim 1, is characterized in that, describedly from the second equipment, obtains pending video file, comprising:
Determine the target video file in the second equipment, from described the second equipment, read this complete target video file, as pending video file;
Or,
Determine the target video file in the second equipment, from the second equipment, read the fragment of this target video file, as pending video file.
3. method according to claim 1, is characterized in that, described from obtained pending video file, positioning video key frame, comprising:
Obtained pending video file is decoded;
From decoded result, the key frame of video in default moment of location.
4. method according to claim 1, is characterized in that, described from obtained pending video file, positioning video key frame, comprising:
From obtained pending video file, the key frame of video data in default moment of location;
To described key frame of video decoding data, obtain key frame of video.
5. method according to claim 4, is characterized in that, the described default moment comprises: acquiescence moment and alternative moment;
Described from obtained pending video file, the key frame of video data in default moment of location, comprising:
From obtained pending video file, the key frame of video data in location acquiescence moment;
In the case of the key frame of video data in acquiescence moment locate failed, locate the key frame of video data in alternative moment.
6. method according to claim 1, is characterized in that, described described key frame of video is processed, and generates the video thumbnails of default form, comprising:
Described key frame of video is carried out to size change over, and the two field picture after size change over is carried out to format conversion, obtain the video thumbnails of default form;
Or
Described key frame of video is carried out to format conversion, and the two field picture after format conversion is carried out to size change over, obtain the video thumbnails of default form.
7. method according to claim 1, is characterized in that, the connected mode of described the first equipment and the second equipment comprises:
USB connected mode or wireless connections mode.
8. method according to claim 7, is characterized in that, the connected mode of described the first equipment and the second equipment is USB connected mode;
Describedly from the second equipment, obtain pending video file, be specially:
Use Android debugging bridge ADB order from the second equipment, to obtain pending video file.
9. method according to claim 1, is characterized in that, the method also comprises:
Generated video thumbnails is sent to the second equipment, so that the second equipment is preserved and/or shown this video thumbnails.
10. a video thumbnails generating apparatus, is applied to the first equipment, and described the first equipment is used for the video generating video thumbnail for the second equipment, it is characterized in that, this device comprises:
Video file acquisition module, for obtaining pending video file from the second equipment;
Key frame locating module, for the pending video file from obtained, positioning video key frame;
Thumbnail generation module, for this key frame of video is processed, generates the video thumbnails of default form.
11. devices according to claim 10, is characterized in that, described video file acquisition module, specifically for:
Determine the target video file in the second equipment, from the second equipment, read this complete target video file, as pending video file;
Or,
Determine the target video file in the second equipment, from the second equipment, read the fragment of this target video file, as pending video file.
12. devices according to claim 10, is characterized in that, described key frame locating module, comprising:
Video decode submodule, for decoding to obtained pending video file;
Key frame locator module, for from decoded result, locates the key frame of video in default moment.
13. devices according to claim 10, is characterized in that, described key frame locating module, comprising:
Frame data locator module, for the pending video file from obtained, the key frame of video data in default moment of location;
Frame data decoding submodule, for to described key frame of video decoding data, obtains key frame of video.
14. devices according to claim 13, is characterized in that, the described default moment comprises: acquiescence moment and alternative moment; Described frame data locator module, specifically for from obtained pending video file, the key frame of video data in location acquiescence moment;
In the case of the key frame of video data in acquiescence moment locate failed, locate the key frame of video data in alternative moment.
15. devices according to claim 10, is characterized in that, described thumbnail generation module, specifically for:
Described key frame of video is carried out to size change over, and the two field picture after size change over is carried out to format conversion, obtain the video thumbnails of default form;
Or
Described key frame of video is carried out to format conversion, and the two field picture after format conversion is carried out to size change over, obtain the video thumbnails of default form.
16. devices according to claim 10, is characterized in that, the connected mode of described the first equipment and the second equipment comprises:
USB connected mode or wireless connections mode.
17. devices according to claim 16, is characterized in that, the connected mode of described the first equipment and the second equipment is USB connected mode; Described video file acquisition module, specifically for using Android debugging bridge ADB order to obtain video file from the second equipment.
18. devices according to claim 10, is characterized in that, this device also comprises:
Thumbnail sending module, for generated video thumbnails is sent to the second equipment, so that the second equipment is preserved and/or shown this video thumbnails.
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| CN104916297A (en) * | 2015-03-20 | 2015-09-16 | 广东欧珀移动通信有限公司 | Video file display method, mobile terminal and system |
| CN106572380A (en) * | 2016-10-19 | 2017-04-19 | 上海传英信息技术有限公司 | User terminal and video dynamic thumbnail generating method |
| CN108810622A (en) * | 2018-07-09 | 2018-11-13 | 腾讯科技（深圳）有限公司 | Extracting method, device, computer-readable medium and the electronic equipment of video frame |
| CN109905782A (en) * | 2019-03-31 | 2019-06-18 | 联想(北京)有限公司 | A kind of control method and device |
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