CN1855285B - How to store audio-visual files and how to edit audio-visual files - Google Patents

Abstract

A recording medium for storing video files and a method for editing video files are provided. The method adopts a computer readable recording medium for storing video-audio files, when the video-audio files are stored, the ending position of the Group of pictures (GOP) of the video-audio files is aligned with the Cluster boundary position of the computer readable recording medium, when the video-audio files are edited, because the implementing point of editing the video-audio files is also positioned on the Cluster boundary of the recording medium, the original video-audio files can be directly divided by modifying the Cluster chain relation and the file length of the corresponding file description structure in the recording medium, thereby avoiding the copying and moving of the actual file contents in the computer readable recording medium and improving the efficiency of editing the video-audio files.

Description

How to store audio-visual files and how to edit audio-visual files

technical field

The present invention relates to a method for storing files, and in particular relates to a method for storing audio-visual files in recording media. the

Background technique

In the current situation where video object (Video Object, VOB) audio-visual files are stored in a computer-readable storage medium such as a hard disk in an existing manner, when a digital video device needs to perform editing operations on audio-visual files, due to the image group of the audio-visual file As well as the minimum configuration unit (Allocation Unit)-cluster of the file system that can be read by the computer, the unit length is inconsistent. If the file clipping operation mode provided by the general file system is used, it will inevitably involve the copying of the actual audio and video data of the file. and moving. the

FIG. 1 is a flow chart of the operation of traditional file system for splitting audio-visual files. In step S110, the user first determines the split point of the video file. Step S120, open the original file to be divided and open the new file A and the new file B at the same time. Then step S130 starts to read the original file and write the read data into the new file A. Step S140, judging whether a split point is encountered when the original file is read. If no split point is encountered, the operations of reading the original file and writing the new file A will continue. However, if a split point is encountered, the process proceeds to step S150 and starts to write the read original file data into the new file B instead. Step S160, judging whether the end of the read original file has been reached. If the end of the file has not been reached, the operations of reading the original file and writing the new file B will continue. If the end of the file has been reached, close and delete the original file, and close the new file A and the new file B. the

FIG. 2 is a schematic diagram of data editing for video and audio file segmentation in a traditional file system. Among them, C1 to C7 represent the original cluster chain structure, and data 1 to 4 are video and audio data, which may include one or several video groups. The original image group is divided into segmented file A (220) and segmented file B (230) through a segmentation point 210 positioned by the user, wherein, when the segmented point 210 positioned by the user is located between the data of the data 3 , the split file A not only includes C1 to C4 of the original cluster chain structure, but also includes C5 before the split point. As for the remaining part of C5, a group of padding packets is used to fill up, and the file length of the split file A is modified to the end of the data of the split file. And split file B is to be except comprising the C6 and C7 of original cluster link structure, in addition need to copy the data that is positioned at the split point in data 3, fill up the remaining part in data 3 with a group of filling packets 240, finally just Link the copied data to the beginning of the cluster link structure of the split file B, and modify the file length and data offset (Offset) of the split file B to correct the starting position of data reading. After the above file splitting steps are completed, the navigation package of the split file is finally modified to complete all the file splitting procedures. the

The above-mentioned methods all involve the copying and moving of actual data. Because audio-visual files generally have a large amount of data, if a large amount of actual data is copied or moved, it will cause a long time consumption, and the efficiency of its execution is low. Can meet today's emphasis on high-efficiency data processing requirements. the

Contents of the invention

The purpose of the present invention is to provide a computer-readable recording medium for storing audio-visual files. Alignment avoids the copying and moving of the actual file content in the computer-readable recording medium when editing audio-visual files, and improves the efficiency of audio-visual file editing. the

Another object of the present invention is to provide a method for editing audio-visual files, especially a method for dividing audio-visual files. Second, by modifying the cluster chain relationship and file length of the corresponding file description structure in the recording medium, the original video file is directly divided to improve the efficiency of video file editing. the

Another object of the present invention is to provide a method for editing video and audio files, especially a method for editing and editing audio and video files. Remove audio and video data in a specific range, and directly cut and remove audio and video data in a specific range by modifying the cluster chain relationship and file length of the corresponding file description structure in the recording medium to improve the efficiency of audio and video file editing. the

The present invention proposes a method for storing audio-visual files for computer-readable recording media, wherein the audio-visual files include at least one image group, and the storage method for audio-visual files includes: storing the image group on the computer-readable recording medium ; Determine whether the data length of the video group is an integral multiple of the length of a cluster boundary of the recording medium; when the data length of the video group is not an integral multiple of the cluster boundary length, add at least one padding packet after the video group , so that the total data length of the video group and the padding packet is an integer multiple of the cluster boundary length. the

According to the storage method of audio-visual files described in the preferred embodiment of the present invention, the data length of each above-mentioned image group is an integral multiple of the second border length, and the total data length of the image group and the filling packet is the recording medium The cluster boundary length of is an integer multiple of the second boundary length. the

According to the method for storing video and audio files in a preferred embodiment of the present invention, the above-mentioned second boundary length is the data length of the video, audio and stuffing packets of the recording medium. the

According to the method for storing video and audio files described in the preferred embodiment of the present invention, the size of the above-mentioned padding packet is 2KB. the

The present invention proposes a method for editing audio-visual files to divide the first audio-visual file into a second audio-visual file and a third audio-visual file, wherein the data length of the first audio-visual file is an integral multiple of the first boundary length, and the first The boundary length is the cluster boundary length, and the first audio-visual file includes at least one image group, and when the data length of any image group is not an integral multiple of the first boundary length, the image group further includes at least one stuffing packet, Make the total data length of the image group and the padding packet be an integral multiple of the length of the first boundary. The clipping method first locates the segmentation point input by the user, wherein the segmentation point is located at the end of any image group, and then establishes the second The file description structure of the audio-visual file and the third audio-visual file, and finally modify the file length of the file description structure of the second audio-visual file to be the length of the original cluster chain before the split point, and connect the original cluster chain before the split point to the second audio-visual file, and modifying the file length of the file description structure of the third audio-visual file to be the length of the original cluster chain after the split point, and connecting the original cluster chain after the split point to the third audio-visual file. the

The present invention proposes a method for editing audio-visual files. The data length of the audio-visual file is an integral multiple of the first boundary length, and the first boundary length is the cluster boundary length. The audio-visual file includes at least one image group. When any image group When the data length of the group is not an integral multiple of the first boundary length, the image group further includes at least one padding packet, so that the total data length of the image group and the padding packet is an integer multiple of the first boundary length. The clipping method first Locating the first segmentation point and the second segmentation point input by the user, wherein the first segmentation point and the second segmentation point are located at the end position of any image group and the second segmentation point is located after the first segmentation point, the first segmentation point The data between the point and the second split point has a length to be discarded, and then the original cluster chain before the first split point and the original cluster chain after the second split point are connected, and the data between the first split point and the second split point are released The original cluster chain between the points, the file length of the file description structure of the finally modified audio-visual file is the length of the original cluster chain minus the cut off length. the

In summary, the audio-visual file editing method of the present invention can directly modify the cluster chain relationship and file length of the corresponding file description structure in the recording medium because the implementation point of audio-visual file editing is located on the cluster boundary of the recording medium. Dividing the original audio-visual file does not involve the copying and moving of the actual file content in the computer-readable recording medium, so the efficiency of editing the audio-visual file can be improved. the

In order to make the above and other objects, features and advantages of the present invention more comprehensible, preferred embodiments will be described in detail below together with the accompanying drawings. the

Description of drawings

FIG. 1 is a flow chart showing the operation flow of splitting audio-visual files in a conventional file system. the

FIG. 2 is a schematic diagram of data clipping in which audio-visual files are segmented in traditional file systems. the

FIG. 3 is a schematic diagram of a computer-readable recording medium for storing audio-visual files according to a preferred embodiment of the present invention. the

FIG. 4 is a flow chart of a data segmentation method for an audio-visual file according to a preferred embodiment of the present invention. the

FIG. 5 is a schematic diagram of data division of an audio-visual file according to a preferred embodiment of the present invention. the

FIG. 6 is a flow chart of a data editing method for video and audio files according to a preferred embodiment of the present invention. the

FIG. 7 is a schematic diagram of data editing of an audio-visual file according to a preferred embodiment of the present invention. the

Detailed ways

3 is a schematic diagram of a computer-readable recording medium for storing audio-visual files according to a preferred embodiment of the present invention, wherein when the audio-visual files are stored, the original image groups are stored in the recording medium in a cluster-aligned manner. If the end position 310 of the original image group is not at the boundary position 320 of the cluster, then a group of padding packets 330 (wherein each padding packet size is 2KB) is added after the original image group until the end position of the image group until the border position 320 of the cluster is reached. This restricts the size of each image group structure to an integer multiple of the cluster size. Moreover, the size of each video group structure is also an integer multiple of the data packet length of the recording medium, wherein the data packet length includes, for example, the data length of a video packet, an audio packet, and a padding packet. The above method of aligning with the end position of the image group takes the boundary position of the cluster as an example, and it is not limited to only use this boundary position. Those who are familiar with this technology can see it without departing from the spirit and scope of the present invention. Actually need to use a different position to align. the

Fig. 4 is a flow chart of a data segmentation method for audio-visual files according to a preferred embodiment of the present invention. This method uses the above-mentioned file structure of a computer-readable recording medium for storing audio-visual files, and implements the steps of file segmentation The division point input by the user is located on the cluster chain, and the original cluster chain is divided into two at the position of the division point (step S410). Then create a new file description structure of the split file A and the split file B (step S420). In the newly created split file A, modify the file length in the file description structure of the split file A to be the length of the original cluster chain before the split point, and connect the original cluster chain before the split point to the split file A; and modify the split file The file length in the file description structure of B is the length of the original cluster chain before the split point, and the original cluster chain after the split point is connected to the split file B (step S430). the

FIG. 5 is a schematic diagram of data division of an audio-visual file according to a preferred embodiment of the present invention. Among them, C1 to C7 represent the original cluster chain structure of the source file, and data 1 to 4 are image group structures, because the segmentation point 510 for implementing file segmentation is located at the boundary position of data 2 and data 3 (also the boundary position of the cluster) Therefore, the new split file A (520) generated after the storage split can be directly linked to C1 to C4 in the original cluster structure, and the split file B (530) can be directly linked to C5 to C4 in the original cluster structure. C7, the process does not involve the copying and moving of archives. The above embodiments only use a single split point to split a file at a single location as an example, and it is not limited to only split once or at a single location. The user can determine the number and location of split points according to actual needs. the

Fig. 6 is a flow chart of a data editing method for audio-visual files according to a preferred embodiment of the present invention. This method adopts the above-mentioned file structure of the computer-readable recording medium for storing audio-visual files, and cuts the file by one part. The steps of the length data of the AB section are to locate the segmentation point A and the segmentation point B input by the user on the cluster chain (step S610), wherein both the segmentation point A and the segmentation point B are located at the end of any image group and the division point B is located after the division point A, and the data between the division point A and the division point B has a rounded length. Connect the original cluster chain before the split point A and the original cluster chain after the split point B, and release the original cluster chain between the split point A and the split point B (step S620), modify the file description structure of the original video file The length of the file (step S630) is the length of the original cluster chain minus the cut length. the

FIG. 7 is a schematic diagram of data editing of an audio-visual file according to a preferred embodiment of the present invention. Among them, C1 to C7 represent the original cluster chain structure, and data 0 to 5 represent the image group structure. Cut and release the data 730 between the segmentation point A (710) and the segmentation point B (720) in the original image group through the segmentation point A (710) and the segmentation point B (720) positioned by a user, and release The cut file is stored back to the original video file, wherein the cut file only includes C1, C2, C3, C6 and C7 in the original cluster chain structure. The above embodiments only take the splicing of a single-length file at a specific location as an example, and it is not limited to only splicing a fixed-length file or at a single location. The user can determine the length and location of the spliced data according to actual needs. the

To sum up, when the audio-visual files of the present invention are stored on a computer-readable recording medium, the border positions of the image groups will be aligned with the border positions of the clusters. Since the editing point for the audio-visual file will be at the border of the image group, the execution point for obtaining the clipping of the audio-video file will also be at the border of the cluster. Therefore, in the process of editing audio-visual files, the requirements for editing audio-visual files can be achieved by directly modifying the cluster relationship and file length of the corresponding file description structure in the file system, without the need for the actual audio-visual data in the storage medium. Copy and move, so higher efficiency can be obtained. the

Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Anyone skilled in the art can make some changes and modifications without departing from the spirit and scope of the present invention. Therefore, this The scope of protection of the invention shall be defined by the scope of the appended patent application. the

Claims (8)

1. the storage method of a video/audio archive is used for the recording medium of an embodied on computer readable, and wherein this video/audio archive comprises at least one image group, and the storage method of this video/audio archive comprises:

Store this image group in the recording medium of this embodied on computer readable;

Whether the data length of judging this image group is the integral multiple of the cluster boundary length of this recording medium; And

When the data length of this image group is not the integral multiple of this bunch boundary length, after this image group, add and fill out at least one filling package, make the integral multiple of total data length of this image group and described filling package for this bunch boundary length.

2. as applying for the storage method of the described video/audio archive of claim 1, wherein, the data length of each image group is the integral multiple of one second boundary length, and total data length of this image group and described filling package is this bunch boundary length and is the integral multiple of this second boundary length.

3. as the storage method of application claim 2 described video/audio archive, wherein this second boundary length be this recording medium video signal, message and the data length of filling package.

4. as the storage method of the described video/audio archive of application claim 1, the size of this filling package is 2KB.

5. the clipping method of a video/audio archive, in order to one first video/audio archive is divided into one second video/audio archive and one the 3rd video/audio archive, wherein, the data length of this first video/audio archive is the integral multiple of one first boundary length, and this first boundary length is the cluster boundary length, and this first video/audio archive comprises at least one image group, when the data length of arbitrary image group is not the integral multiple of this first boundary length, then this image group more comprises at least one filling package, make the integral multiple of total data length of this image group and described filling package for this first boundary length, this clipping method comprises the following steps:

Location a cut-point that the user imported, wherein this cut-point is positioned at the end position of arbitrary image group;

Set up the archives description scheme of this second video/audio archive and the 3rd video/audio archive; And

The file length of revising the archives description scheme of this second video/audio archive is former bunch of chain length before this cut-point, and connect this cut-point former bunch of chain before to this second video/audio archive, and the file length of revising the archives description scheme of the 3rd video/audio archive is former bunch of chain length after this cut-point, and connects former bunch of chain after this cut-point to the 3rd video/audio archive.

6. as applying for the clipping method of the described video/audio archive of claim 5, wherein, the data length of each image group is the integral multiple of one second boundary length, and total data length of this image group and described filling package is this first boundary length and is the integral multiple of this second boundary length.

7. the clipping method of a video/audio archive, the data length of this video/audio archive is the integral multiple of one first boundary length, and this first boundary length is the cluster boundary length, and this video/audio archive comprises at least one image group, when the data length of arbitrary image group is not the integral multiple of this first boundary length, then this image group more comprises at least one filling package, make the integral multiple of total data length of this image group and described filling package for this first boundary length, this clipping method comprises the following steps:

Location one first cut-point and one second cut-point that the user imported, wherein this first cut-point and this second cut-point end position and this second cut-point that are positioned at arbitrary image group is positioned at after this first cut-point, and the data between this first cut-point and this second cut-point has the length of casting out;

Connect this first cut-point former bunch of chain and this second cut-point former bunch of chain afterwards before, and discharge former bunch of chain between this first cut-point and this second cut-point; And

The file length of revising the archives description scheme of this video/audio archive is that former bunch of chain length deducts this that cut away and cast out length.

8. as applying for the clipping method of claim 7 a described video/audio archive, wherein, the data length of each image group is the integral multiple of one second boundary length, and total data length of this image group and described filling package is this first boundary length and is the integral multiple of this second boundary length.

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