CN105227884A - Realize method that video file puts upside down and device thereof - Google Patents
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Abstract
The invention discloses and a kind ofly realize method that video file puts upside down and device thereof, described method comprises acquisition video file, and loads corresponding SDK file; Video instruction of putting upside down according to input determines at least one sequence of frames of video fragment from described video file frame sequence, and call SDK file according to the index information of reference the I frame of sequence of frames of video slice header as the input parameter of SDK interface, to obtain the described sequence of frames of video decoded YUV frame sequence fragment data of order and timestamp information by its buffer memory at least one buffering area accordingly thereof; According to the YUV frame sequence fragment data in described timestamp information backward display at least one buffering area described.Adopt technical scheme provided by the invention, only need once to decode to same sequence of frames of video collection, carry out inverted order display afterwards, thus effectively improve the operational efficiency of program.
Description
Technical field
The present invention relates to video display arts field, realize method that video file puts upside down and device thereof in particular to a kind of.
Background technology
In daily life, by putting upside down to audio-visual works and can obtaining certain entertainment effect.In the application of field of video monitoring, by carrying out Reverse Play to the video record file preserved, the video frames that can user be found fast to go for, but existing main flow player does not mostly support putting upside down of video file, along with the development of multimedia technology, the application of technology of putting upside down more and more can receive the concern of people.
The method that existing techniques in realizing video file is put upside down is: as shown in Figure 1, in video file, read P frame (non-reference frame) data between two I frames (reference frame), and form a sequence sets in conjunction with the I frame data before first P frame simultaneously.Decode because P frame data needs to rely on I frame, and put upside down to realize video, need first to perform this sequence sets decode and store decoded data, and then the data after backward broadcast decoder.In order to save the memory headroom of storage, prior art takes such processing mode: continue with reference to figure 1, first from I frame, first time complete decoding is carried out to the sequence sets of 12 frames, and store finally to decode 4 frame data that obtain and given backward and show, then continue to decode to 8 frame data shown from I frame, and store finally to decode 4 frame data that obtain and given backward and show, finally continue to decode to 4 frame data shown from I frame, and store these 4 frame data and the frame of video comprising I frame is carried out backward display, after the backward display completing this sequence sets, according to said method again decode forward and show another sequence sets, until first of video file I frame has shown.
This shows, put upside down in method at above-mentioned existing video file, a sequence sets is needed by repeatedly decoding and then completing display, reduce the efficiency of decoding and display.
Summary of the invention
Given this, the object of the embodiment of the present invention is to provide a kind of and realizes method that video file puts upside down and device thereof.
The embodiment of the present invention realizes by the following technical solutions:
Realize the method that video file is put upside down, comprising:
A, acquisition video file, and load corresponding SDK file;
B, from described video file frame sequence, determine at least one sequence of frames of video fragment according to the video instruction of putting upside down of input, and call SDK file according to the index information of reference the I frame of sequence of frames of video slice header as the input parameter of SDK interface, to obtain the described sequence of frames of video decoded YUV frame sequence fragment data of order and timestamp information by its buffer memory at least one buffering area accordingly thereof;
C, according to the YUV frame sequence fragment data in described timestamp information backward display at least one buffering area described.
Preferably, described step B comprises:
Video instruction of putting upside down according to input determines a start frame from described video file frame sequence, with this start frame for benchmark is to prelocalization to determine one first with reference to I frame as index frame, SDK file is called using the index information of described index frame as the input parameter of SDK interface, an order decoded YUV frame sequence fragment is carried out and by its buffer memory to buffering area, a YUV frame sequence fragment in backward display buffer from index frame to the sequence of frames of video fragment of start frame to described to obtain;
Using the index frame of last time as current start frame and as benchmark to prelocalization to determine that one second with reference to I frame, and call SDK file using the index information of described second reference I frame as the input parameter of SDK interface, with the decoded 2nd YUV frame sequence fragment of acquisition order and by its buffer memory to buffering area, the 2nd YUV frame sequence fragment in backward display buffer, by that analogy, until described video file has been shown by backward or the video that receives is put upside down to cease and desist order is responded.
Preferably, described step B comprises:
Video instruction of putting upside down according to input determines at least two sequence of frames of video fragments from described video file frame sequence, and call SDK file described in the index information of the reference I frame of foundation sequence of frames of video slice header, with acquisition to the described sequence of frames of video decoded YUV frame sequence fragment data of order and by its buffer memory to the buffering area being in store status, and after storage completely, the state of this memory block is demarcated as show state; Backward display is carried out to the YUV frame sequence fragment data be in the buffering area of show state simultaneously, and after having shown, discharge the storage resources of this memory block, and its state is demarcated as store status.
Preferably, backward shows the method for described YUV frame sequence fragment data and is:
Described YUV frame sequence fragment data is imported into encapsulation and bound in the SDL storehouse of display window handle with being initialised, show described YUV frame sequence fragment data by described display window backward.
Realize the device that video file is put upside down, comprising:
Acquisition module, for obtaining video file;
Load-on module, for loading corresponding SDK file according to the video file obtained;
Decoding process module, from described video file frame sequence, at least one sequence of frames of video fragment is determined for instruction of putting upside down according to the video of input, and call SDK file according to the index information of reference the I frame of sequence of frames of video slice header as the input ginseng of SDK interface, to obtain the described sequence of frames of video decoded YUV frame sequence fragment data of order and timestamp information by its buffer memory at least one buffering area accordingly thereof;
Backward display module, for showing the YUV frame sequence fragment data at least one buffering area described according to described timestamp information backward;
Buffering area, for buffer memory YUV frame sequence fragment data and corresponding timestamp information thereof.
Preferably, decoding process module determines a start frame according to the video instruction of putting upside down of input from described video file frame sequence, with this start frame for benchmark is to prelocalization to determine one first with reference to I frame as index frame, SDK file is called using the index information of described index frame as the input parameter of SDK interface, an order decoded YUV frame sequence fragment is carried out and by its buffer memory to buffering area, a YUV frame sequence fragment in backward display module backward display buffer from index frame to the sequence of frames of video fragment of start frame to described to obtain;
After the YUV frame sequence fragment in buffering area has been shown by backward, decoding process module using the index frame of last time as current start frame and as benchmark to prelocalization to determine that one second with reference to I frame, and call SDK file using the index information of described second reference I frame as the input parameter of SDK interface, with the decoded 2nd YUV frame sequence fragment of acquisition order and by its buffer memory to buffering area, the 2nd YUV frame sequence fragment in backward display module backward display buffer;
By that analogy, until described video file has been shown by backward display module backward or backward display module receives video and puts upside down and cease and desist order and respond.
Preferably, describedly realize the device that video file puts upside down and also comprise:
State demarcating module, for demarcating the state of buffering area;
Memory module, for demarcating the YUV frame sequence fragment data optionally buffer memory extremely correspondingly buffering area exported by decoding process module to the state of buffering area according to state demarcating module.
Preferably, decoding process module determines at least two sequence of frames of video fragments according to the video instruction of putting upside down of input from described video file frame sequence, and call SDK file, to obtain described sequence of frames of video sequentially decoded YUV frame sequence fragment data according to the index information of reference the I frame of sequence of frames of video slice header as the input parameter of SDK interface; Memory module is demarcated by described YUV frame sequence fragment data buffer memory to the buffering area being in store status according to state demarcating module to the state of buffering area, and described state demarcating module is used for storing completely in this corresponding buffering area the state of this memory block is demarcated as show state; Backward display module carries out backward display according to the state demarcation of state demarcating module to buffering area to the YUV frame sequence fragment data be in the buffering area of show state, described state demarcating module is used for the storage resources of this memory block of release after the YUV frame sequence fragment data in this corresponding buffering area has shown, and its state is demarcated as store status.
Preferably, that described YUV frame sequence fragment data is imported into encapsulation by described backward display module and bound with being initialised in the SDL storehouse of display window handle, and show described YUV frame sequence fragment data by described display window backward.
Adopt technical scheme provided by the invention, only need once to decode to same sequence of frames of video collection, carry out inverted order display afterwards, thus effectively improve the operational efficiency of program.
Accompanying drawing explanation
Fig. 1 is to the method schematic diagram that sequence of frames of video collection is decoded in prior art;
The method flow schematic diagram that Fig. 2 puts upside down for the existing video file that the embodiment of the present invention provides;
Fig. 3 is the schematic diagram that the embodiment of the present invention is decoded to sequence of frames of video collection;
The apparatus structure schematic diagram that Fig. 4 puts upside down for the existing video file that the embodiment of the present invention provides;
The apparatus structure schematic diagram that Fig. 5 puts upside down for the existing video file that another embodiment of the present invention provides.
The realization of the object of the invention, functional characteristics and excellent effect, be described further below in conjunction with specific embodiment and accompanying drawing.
Embodiment
Below in conjunction with the drawings and specific embodiments, technical scheme of the present invention is described in further detail, can better understand the present invention to make those skilled in the art and can be implemented, but illustrated embodiment is not as a limitation of the invention.
As shown in FIG. 2 and 3, embodiments provide a kind of method realizing video file and put upside down, comprise the steps:
S10, acquisition video file, and load corresponding SDK file;
The video file stored such as is obtained from this locality, Vendor-Type according to video file loads the SDK file of corresponding producer, wherein, described SDK file encapsulates decoding storehouse, and using decoding storehouse to video data decoding, reset video decode position etc. and operate and be supplied to backward display application program as interface and call.
S20, from described video file frame sequence, determine at least one sequence of frames of video fragment according to the video instruction of putting upside down of input, and call SDK file according to the index information of reference the I frame of sequence of frames of video slice header as the input parameter of SDK interface, to obtain the described sequence of frames of video decoded YUV frame sequence fragment data of order and timestamp information by its buffer memory at least one buffering area accordingly thereof;
In this step, first can determine the totalframes of described video file frame sequence, then the video according to input puts instruction upside down from described video file frame sequence establishment start frame, and with this start frame for benchmark chooses forward at least one sequence of frames of video fragment, such as there is a video sequence I1P10P11P12P13 ... P18P19I2P21P22P23P24, put upside down after instruction when getting video, the broadcasting original position (start frame) of establishing now is P23, and with this frame for benchmark, find forward the position with reference to I frame, such as can obtain a nearest position I2 with reference to I frame, when this difference with reference to I frame and start frame P23 is too little, for improving the efficiency being reset decoded positions by SDK, again can find forward the position of another reference I frame, it can be such as the position of I1.Thus determine a sequence of frames of video fragment from described I1 to described P23.The head of described sequence of frames of video fragment is with reference to I frame, at least have one in each sequence of frames of video fragment with reference to I frame and at least one non-reference P frame and/or B frame, the reference I frame in described sequence of frames of video fragment and other non-reference frames all have corresponding index information.
In the present embodiment, index information according to the reference I frame of sequence of frames of video slice header calls SDK file, particularly, call in SDK file storehouse of decoding to video data decoding, the interface resetting the operations such as video decode position, described sequence of frames of video is carried out order and decode and return decoded YUV frame sequence fragment data.
S30, according to the YUV frame sequence fragment data in described timestamp information backward display at least one buffering area described.
Such as, in the present embodiment, the method that backward shows described YUV frame sequence fragment data is:
Described YUV frame sequence fragment data is imported into encapsulation and bound in the SDL storehouse of display window handle with being initialised, show described YUV frame sequence fragment data by described display window backward.
In a kind of embodiment, sequentially from video file frame sequence, obtain a sequence of frames of video fragment successively, and after this sequence of frames of video fragment is processed, obtain next sequence of frames of video fragment again, wherein, described process comprises: sequence of frames of video fragment intercepts, decode and backward shows.Particularly, in this embodiment, described step S20 comprises:
S201, from described video file frame sequence, determine a start frame according to the video instruction of putting upside down of input, with this start frame for benchmark is to prelocalization to determine one first with reference to I frame as index frame, SDK file is called using the index information of described index frame as the input parameter of SDK interface, an order decoded YUV frame sequence fragment is carried out and by its buffer memory to buffering area, a YUV frame sequence fragment in backward display buffer from index frame to the sequence of frames of video fragment of start frame to described to obtain;
S202, using the index frame of last time as current start frame and as benchmark to prelocalization to determine that one second with reference to I frame, and call SDK file using the index information of described second reference I frame as the input parameter of SDK interface, with the decoded 2nd YUV frame sequence fragment of acquisition order and by its buffer memory to buffering area, the 2nd YUV frame sequence fragment in backward display buffer, by that analogy, until described video file has been shown by backward or the video that receives is put upside down to cease and desist order is responded.
In another embodiment of the invention, at least two sequence of frames of video fragments can be intercepted in described video file frame sequence concurrently simultaneously, decoded data for sequence of frames of video fragment can take the double buffering even mode of multiple buffer to perform, particularly, in this embodiment, described step S20 comprises:
Video instruction of putting upside down according to input determines at least two sequence of frames of video fragments from described video file frame sequence, and call SDK file according to the index information of the reference I frame of sequence of frames of video slice header, with acquisition to the described sequence of frames of video decoded YUV frame sequence fragment data of order and by its buffer memory to the buffering area being in store status, and after storage is full, the state of this memory block is demarcated as show state; Backward display is carried out to the YUV frame sequence fragment data be in the buffering area of show state simultaneously, and after having shown, discharge the storage resources of this memory block, and its state is demarcated as store status.
Correspondingly, as shown in Figure 4, the embodiment of the present invention additionally provides a kind of device realizing video file and put upside down, comprising:
Acquisition module, for obtaining video file;
Load-on module, for loading corresponding SDK file according to the video file obtained;
Decoding process module, from described video file frame sequence, at least one sequence of frames of video fragment is determined for instruction of putting upside down according to the video of input, and call SDK file according to the index information of reference the I frame of sequence of frames of video slice header as the input parameter of SDK interface, to obtain the described sequence of frames of video decoded YUV frame sequence fragment data of order and timestamp information by its buffer memory at least one buffering area accordingly thereof;
Backward display module, for showing the YUV frame sequence fragment data at least one buffering area described according to described timestamp information backward;
Buffering area, for buffer memory YUV frame sequence fragment data.
In a kind of embodiment, described buffering area is set to one, decoding process module determines a start frame according to the video instruction of putting upside down of input from described video file frame sequence, with this start frame for benchmark is to prelocalization to determine one first with reference to I frame as index frame, SDK file is called using the index information of described index frame as the input parameter of SDK interface, an order decoded YUV frame sequence fragment is carried out and by its buffer memory to buffering area from index frame to the sequence of frames of video fragment of start frame to described to obtain, a YUV frame sequence fragment in backward display module backward display buffer,
After the YUV frame sequence fragment in buffering area has been shown by backward, decoding process module using the index frame of last time as current start frame and as benchmark to prelocalization to determine that one second with reference to I frame, and call SDK file using the index information of described second reference I frame as the input parameter of SDK interface, with the decoded 2nd YUV frame sequence fragment of acquisition order and by its buffer memory to buffering area, the 2nd YUV frame sequence fragment in backward display module backward display buffer;
By that analogy, until described video file has been shown by backward display module backward or backward display module receives video and puts upside down and cease and desist order and respond.
In another kind of embodiment, as shown in Figure 5, describedly realize the device that video file puts upside down and also comprise:
State demarcating module, for demarcating the state of buffering area;
Memory module, for demarcating the YUV frame sequence fragment data optionally buffer memory extremely correspondingly buffering area exported by decoding process module to the state of buffering area according to state demarcating module.
In this embodiment, decoding process module determines at least two sequence of frames of video fragments according to the video instruction of putting upside down of input from described video file frame sequence, and call SDK file, to obtain described sequence of frames of video sequentially decoded YUV frame sequence fragment data according to the index information of reference the I frame of sequence of frames of video slice header as the input parameter of SDK interface; Memory module is demarcated by described YUV frame sequence fragment data buffer memory to the buffering area being in store status according to state demarcating module to the state of buffering area, and described state demarcating module is used for storing completely in this corresponding buffering area the state of this memory block is demarcated as show state; Backward display module carries out backward display according to the state demarcation of state demarcating module to buffering area to the YUV frame sequence fragment data be in the buffering area of show state, described state demarcating module is used for the storage resources of this memory block of release after the YUV frame sequence fragment data in this corresponding buffering area has shown, and its state is demarcated as store status.
When carrying out backward display, that described YUV frame sequence fragment data is imported into encapsulation by described backward display module and bound with being initialised in the SDL storehouse of display window handle, and show described YUV frame sequence fragment data by described display window backward.
The foregoing is only the preferred embodiments of the present invention; not thereby the scope of the claims of the present invention is limited; every utilize specification of the present invention and accompanying drawing content to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (9)
1. realize the method that video file is put upside down, it is characterized in that, comprising:
A, acquisition video file, and load corresponding SDK file;
B, from described video file frame sequence, determine at least one sequence of frames of video fragment according to the video instruction of putting upside down of input, and call SDK file according to the index information of reference the I frame of sequence of frames of video slice header as the input parameter of SDK interface, to obtain the described sequence of frames of video decoded YUV frame sequence fragment data of order and timestamp information by its buffer memory at least one buffering area accordingly thereof;
C, according to the YUV frame sequence fragment data in described timestamp information backward display at least one buffering area described.
2. realize the method that video file is put upside down as claimed in claim 1, it is characterized in that, described step B comprises:
Video instruction of putting upside down according to input determines a start frame from described video file frame sequence, with this start frame for benchmark is to prelocalization to determine one first with reference to I frame as index frame, SDK file is called using the index information of described index frame as the input parameter of SDK interface, an order decoded YUV frame sequence fragment is carried out and by its buffer memory to buffering area, a YUV frame sequence fragment in backward display buffer from index frame to the sequence of frames of video fragment of start frame to described to obtain;
Using the index frame of last time as current start frame and as benchmark to prelocalization to determine that one second with reference to I frame, and call SDK file using the index information of described second reference I frame as the input parameter of SDK interface, with the decoded 2nd YUV frame sequence fragment of acquisition order and by its buffer memory to buffering area, the 2nd YUV frame sequence fragment in backward display buffer, by that analogy, until described video file has been shown by backward or the video that receives is put upside down to cease and desist order is responded.
3. realize the method that video file is put upside down as claimed in claim 1, it is characterized in that, described step B comprises:
Video instruction of putting upside down according to input determines at least two sequence of frames of video fragments from described video file frame sequence, and call SDK file according to the index information of the reference I frame of sequence of frames of video slice header as the input parameter of SDK interface, with acquisition to the described sequence of frames of video decoded YUV frame sequence fragment data of order and by its buffer memory to the buffering area being in store status, and after storage is full, the state of this memory block is demarcated as show state; Backward display is carried out to the YUV frame sequence fragment data be in the buffering area of show state simultaneously, and after having shown, discharge the storage resources of this memory block, and its state is demarcated as store status.
4. as described in any one of claim 1-3, realize the method that video file puts upside down, it is characterized in that, the method that backward shows described YUV frame sequence fragment data is:
Described YUV frame sequence fragment data is imported into encapsulation and bound in the SDL storehouse of display window handle with being initialised, show described YUV frame sequence fragment data by described display window backward.
5. realize the device that video file is put upside down, it is characterized in that, comprising:
Acquisition module, for obtaining video file;
Load-on module, for loading corresponding SDK file according to the video file obtained;
Decoding process module, from described video file frame sequence, at least one sequence of frames of video fragment is determined for instruction of putting upside down according to the video of input, and call SDK file according to the index information of reference the I frame of sequence of frames of video slice header as the input parameter of SDK interface, to obtain the described sequence of frames of video decoded YUV frame sequence fragment data of order and timestamp information by its buffer memory at least one buffering area accordingly thereof;
Backward display module, for showing the YUV frame sequence fragment data at least one buffering area described according to described timestamp information backward;
Buffering area, for buffer memory YUV frame sequence fragment data and corresponding timestamp information thereof.
6. realize the device that video file is put upside down as claimed in claim 5, it is characterized in that,
Decoding process module determines a start frame according to the video instruction of putting upside down of input from described video file frame sequence, with this start frame for benchmark is to prelocalization to determine one first with reference to I frame as index frame, SDK file is called using the index information of described index frame as the input parameter of SDK interface, an order decoded YUV frame sequence fragment is carried out and by its buffer memory to buffering area, a YUV frame sequence fragment in backward display module backward display buffer from index frame to the sequence of frames of video fragment of start frame to described to obtain;
After the YUV frame sequence fragment in buffering area has been shown by backward, decoding process module using the index frame of last time as current start frame and as benchmark to prelocalization to determine that one second with reference to I frame, and call SDK file using the index information of described second reference I frame as the input parameter of SDK interface, with the decoded 2nd YUV frame sequence fragment of acquisition order and by its buffer memory to buffering area, the 2nd YUV frame sequence fragment in backward display module backward display buffer;
By that analogy, until described video file has been shown by backward display module backward or backward display module receives video and puts upside down and cease and desist order and respond.
7. realize the device that video file is put upside down as claimed in claim 5, it is characterized in that, also comprise:
State demarcating module, for demarcating the state of buffering area;
Memory module, for demarcating the YUV frame sequence fragment data optionally buffer memory extremely correspondingly buffering area exported by decoding process module to the state of buffering area according to state demarcating module.
8. realize the device that video file is put upside down as claimed in claim 7, it is characterized in that,
Decoding process module determines at least two sequence of frames of video fragments according to the video instruction of putting upside down of input from described video file frame sequence, and call SDK file, to obtain described sequence of frames of video sequentially decoded YUV frame sequence fragment data according to the index information of reference the I frame of sequence of frames of video slice header as the input parameter of SDK interface; Memory module is demarcated by described YUV frame sequence fragment data buffer memory to the buffering area being in store status according to state demarcating module to the state of buffering area, and described state demarcating module is used for storing completely in this corresponding buffering area the state of this memory block is demarcated as show state; Backward display module carries out backward display according to the state demarcation of state demarcating module to buffering area to the YUV frame sequence fragment data be in the buffering area of show state, described state demarcating module is used for the storage resources of this memory block of release after the YUV frame sequence fragment data in this corresponding buffering area has shown, and its state is demarcated as store status.
9. as described in any one of claim 5-8, realize the device that video file puts upside down, it is characterized in that,
That described YUV frame sequence fragment data is imported into encapsulation by described backward display module and bound with being initialised in the SDL storehouse of display window handle, and show described YUV frame sequence fragment data by described display window backward.
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