CN112040239A - A kind of file repair method and device based on AVI format file structure - Google Patents

Abstract

The invention discloses a file repairing method and device based on an AVI format file structure. The method comprises the following steps: determining the encoding type of the damaged file; producing a source code AVI file of the same encoding type according to the encoding type of the damaged file; modifying the source code AVI file code, generate the source code repair file; merge the source code repair file and the damaged video file to get a new AVI repair file; use the player to open the AVI repair file, determine the original input size, resolution, bit rate, frame rate information; repair the AVI The file is transcoded, fill in the size, resolution, bit rate, frame rate information, output a new AVI file, and complete the AVI file repair. It can repair damaged AVI format files based on the hexadecimal code format of the underlying files of AVI format files. According to different file sizes and different damage methods, it can effectively repair and guide damaged AVI format files, so that the important video information in the file can be repaired. be restored.

Description

A kind of file repair method and device based on AVI format file structure

technical field

The invention relates to a file repairing method and device based on the AVI format file structure.

Background technique

AVI format video file is a widely used video format file. The full English name of the file format is Audio Video Interleaved, which is an audio and video interleaved format. It is a file format that combines voice and video synchronously. At present, this format file is mainly used in video shooting, film and television editing, judicial forensics and other fields.

However, in daily work, files are often irreversibly damaged due to damage to the storage medium and virus damage. Malicious viruses often clear or encrypt hexadecimal codes within a fixed range of the header. The problem of sectors and bad blocks makes it impossible to completely read the important sector codes in the header of the AVI format file, so that the AVI format file cannot be opened at all, and the important video information in the file cannot be recognized and used, and there are common AVI format repair tools on the market. Completely ineffective against this issue.

SUMMARY OF THE INVENTION

In view of the above-mentioned defects of the prior art, the technical problem to be solved by this invention is to provide a kind of file repair method and device based on AVI format file structure, according to different file sizes, different damage modes, can effectively repair, guide damaged AVI format file, so that the important video information in the file can be recovered.

For achieving the above object, the invention provides a kind of file repair method based on AVI format file structure, described method may further comprise the steps:

Determine the encoding type of the corrupted file;

According to the encoding type of the damaged file, make a source AVI file of the same encoding type;

Modify the source code of the AVI file to generate the source code repair file;

Merge the source code repair file and the damaged video file to get a new AVI repair file;

Use the player to open the AVI repair file and determine the original input size, resolution, bit rate, frame rate information;

Transcode the AVI repair file, fill in the size, resolution, bit rate, frame rate information, output a new AVI file, and complete the AVI file repair.

Optionally, the determining the encoding of the damaged file includes: using WINHEX software to open the damaged file, and searching for a preset encoding type through a text search function to determine the encoding type of the damaged file.

Optionally, the preset search type includes any one of WMV, MPG, XIVD, DVIX, and AVC.

Optionally, according to the coding type of the damaged file, producing a source code AVI file of the same coding type includes: according to the coding type of the damaged file, making a source code file with the same coding of 5 seconds in length, and then jumping to the end of the source code file, Look up the starting offset address of the last index table, select the first byte of the source code file as the start of the block, and generate a new file as the source code repair file.

Optionally, the merging of the source code repair file and the damaged video file includes: taking the source code repair file as the appendix 1 and the damaged video file as the appendix 2, and merging the appendix 1 and the appendix 2 through WINHEX.

Optionally, before merging the additional 1 and the additional 2 through WINHEX, the following steps are also included: through WINHEX, subtract 8 from the total number of bytes of the source repair file and the damaged video file, convert it to hexadecimal and fill in 0X04 to 0X07 in reverse order address.

Optionally, the use of the player to open the AVI repair file, and determining the original input size, resolution, bit rate, and frame rate information include: using the POTPLAYER software to open the merged AVI repair file, and opening the file properties menu to observe video size changes, Determine the video original size, resolution, bit rate, frame rate information.

Optionally, perform the transcoding operation on the AVI repaired file, fill in the size, resolution, and frame rate information, and output a new AVI file, including: performing the AVI to AVI transcoding operation on the AVI repaired file through FormatFactory, and configuring it to observe The original size, resolution, bit rate, frame rate information, output a new AVI file.

Optionally, the completion of the AVI file restoration includes: importing the new AVI file into PR, AE, VEGAS or other video editing software, editing out the frames of the video sample file, and completing the AVI file restoration.

For achieving the above object, the present invention also provides a kind of file repairing device based on AVI format file structure, comprising:

The encoding type determination module is used to determine the encoding type of the damaged file;

The source code file making module is used to make source code AVI files of the same encoding type;

The source code repair file production module is used to modify the source code AVI file and generate a new source code repair file;

The merge module is used to merge the source code repair file and the damaged video file to obtain a new AVI repair file;

The transcoding module is used to transcode the AVI repair file to complete the AVI file repair.

Owing to adopting the above-mentioned technical scheme, the present invention has the following advantages: the file restoration method based on the AVI format file structure established by the method of the present invention can repair the damaged AVI format file based on the hexadecimal code format of the underlying file of the AVI format file. , according to different file sizes and different ways of damage, it can effectively repair and guide damaged AVI format files, so that important video information in the file can be restored.

Description of drawings

Fig. 1 is the flow chart of the file repair method based on AVI format file structure in the first embodiment of the present invention;

2a and 2b are schematic diagrams of step 2 of the file repair method based on the AVI format file structure according to the first embodiment of the present invention;

3 is a schematic diagram of step 3 of a file repair method based on an AVI format file structure according to the first embodiment of the present invention;

4 is a schematic diagram of step 4 of the file repair method based on the AVI format file structure according to the first embodiment of the present invention;

5 and 6 are schematic diagrams of step 5 of the file repair method based on the AVI format file structure according to the first embodiment of the present invention;

7 is a schematic diagram of step 6 of the file repair method based on the AVI format file structure according to the first embodiment of the present invention.

Detailed ways

Below in conjunction with accompanying drawing and embodiment, the present invention will be further described:

Example 1:

As shown in Figure 1, a kind of file repair method based on AVI format file structure, described method may further comprise the steps:

Step 1: Determine the encoding type of the corrupted file;

Step 2: According to the encoding type of the damaged file, make a source AVI file of the same encoding type;

Step 3: Modify the source code AVI file code to generate the source code repair file;

Step 4: Merge the source code repair file and the damaged video file to get a new AVI repair file;

Step 5: Use the player to open the AVI repair file, and determine the original input size, resolution, bit rate, and frame rate information;

Step 6: Transcode the AVI repair file, fill in the size, resolution, bit rate, frame rate information, output a new AVI file, and complete the AVI file repair.

Specifically, in step 1, determining the code of the damaged file includes: using WINHEX software to open the damaged file, and searching for characters such as "WMV", "MPG", "XIVD", "DVIX", "AVC" through the text search function Determine the corrupt file encoding type. As other preferred embodiments of the present invention, the searched characters are not limited to "WMV", "MPG", "XIVD", "DVIX", and "AVC" listed in the present invention, and may also be searched for characters in other video file formats .

Because the damage of AVI format files may be caused by viruses, some viruses will clear the fixed range of the file header, and you need to use WINHEX software to randomly write the code in the clearing template once.

Further, in step 2 and step 3, according to the encoding type of the damaged file, making the source code AVI file of the same encoding type, including: making a source code file with the same encoding of 5 seconds in length according to the encoding type of the damaged file, and then Jump to the end of the source code file, look up the starting offset address of the last index table, and select the offset address 0X00 as the start of the block, that is, select the first byte of the source code file as the start of the block, see figure for details 2a, select the byte before the last index table of the source code file with the same encoding as the end of the block, see Figure 2b for details, and generate a new file as the source code repair file.

Combined with Figure 3, the following steps are also included before the additional 1 and 2 merging are performed through WINHEX:

Use WINHEX to subtract 8 from the total bytes of the source repair file and the damaged video file, convert it to hexadecimal and fill in the addresses from 0X04 to 0X07 in reverse order.

As shown in FIG. 4 , the merging of the source code repair file and the damaged video file includes: taking the source code repair file as the additional one, the damaged video file as the additional second, and merging the additional one and the second one through WINHEX to obtain the new AVI repair files.

Shown in conjunction with Figure 5 and Figure 6, the described use player to open the AVI repair file, determine the original input size, resolution, bit rate, frame rate information specifically include: open the merged new AVI repair file with POTPLAYER software, open The file properties menu observes the video size change, and determines the video original size, resolution, bit rate, frame rate and other information.

Transcode the AVI repaired file, fill in the size, resolution, frame rate information, and output a new AVI file, including: transcoding the AVI repaired file from AVI to AVI through FormatFactory, and configure it to the observed original size, Resolution, bit rate, frame rate information, output new AVI file. When the playback frame rate is not much different from the source frame rate, the original frame rate can be used directly.

As shown in FIG. 7 , the completion of the AVI file restoration includes: importing the new AVI file into PR, AE, VEGAS or other video editing software, editing the frames of the video sample file, and completing the AVI file restoration.

To sum up, the file repair method based on the AVI format file structure established by the method of the present invention can repair the damaged AVI format file based on the hexadecimal code format of the underlying file of the AVI format file. Different, it can effectively repair and guide damaged AVI format files, so that the important video information in the file can be recovered.

Embodiment 2:

The second embodiment of the present invention provides a file restoration device based on the AVI format file structure, comprising:

The encoding type determination module is used to determine the encoding type of the damaged file; the encoding type determination module uses the WINHEX software to open the damaged file, and searches for "WMV", "MPG", "XIVD", "DVIX", "AVC" through the text search function and other characters to determine the corrupted file encoding type.

The source code file creation module is used to create the source AVI file of the same encoding type; the source file creation module creates a source code file with the same encoding of 5 seconds in length according to the encoding type of the damaged file, and then jumps to the end of the source code file, looking up for the last The starting offset address of an index table, the offset address 0 is selected as the beginning of the block, and a new file is generated as the source code repair file.

The source code repair file creation module is used to modify the source code AVI file and generate a new source code repair file; according to the encoding type of the damaged file, create a source code file with the same encoding with a length of 5 seconds, then jump to the end of the source code file, and look up for the last The starting offset address of an index table, the offset address 0 is selected as the beginning of the block, and a new file is generated as the source code repair file.

The merge module is used to merge the source code repair file and the damaged video file to obtain a new AVI repair file; the merge module takes the source code repair file as the add-on 1 and the damaged video file as the add-on 2, and merges the add-on one and the add-on two through WINHEX, and obtains The new AVI repair file.

The transcoding module is used to transcode the AVI repair file to complete the AVI file repair. Transcode the AVI repaired file, fill in the size, resolution, frame rate information, and output a new AVI file; import the new AVI file into PR, AE, VEGAS or other video editing software, and trim the frames of the video sample file , complete the AVI file repair.

The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and changes according to the concept of the present invention without creative efforts. Therefore, all technical solutions that can be obtained by those skilled in the art through logical analysis, reasoning or limited experiments on the basis of the prior art according to the concept of the present invention shall fall within the protection scope determined by the claims.

Claims (10)

1. A file repair method based on an AVI format file structure is characterized by comprising the following steps:

determining the coding type of the damaged file;

according to the coding type of the damaged file, making a source code AVI file with the same coding type;

modifying the AVI file code of the source code to generate a source code repair file;

merging the source code repair file and the damaged video file to obtain a new AVI repair file;

opening an AVI repair file by using a player, and determining the information of the original input size, resolution, bit rate and frame rate;

and transcoding the AVI repair file, filling size, resolution, bit rate and frame rate information, outputting a new AVI file, and completing AVI file repair.

2. The AVI format file structure-based file repair method of claim 1, wherein the determining the encoding of the corrupted file comprises: and (4) opening the damaged file by using WINHEX software, and searching a preset coding type through a text search function to determine the coding type of the damaged file.

3. The file repair method according to claim 2, wherein the search preset type includes any one of WMV, MPG, XIVD, DVIX, AVC.

4. The method of claim 1, wherein the preparing a source code AVI file of the same encoding type according to the encoding type of the damaged file comprises: and manufacturing a source code file with the same code length of 5 seconds according to the coding type of the damaged file, selecting the first byte of the source code file as the start of a block, then jumping to the tail of the source code file, upwards searching for the initial offset address of the last index table, and generating a new file as a source code repair file.

5. The AVI format file structure-based file repair method of claim 1, wherein the merging the source code repair file and the corrupted video file comprises: and adding a first file and a second file by using the source code repair file and the damaged video file, and combining the first file and the second file by using WINHEX.

6. A file repair method based on AVI format file structure as claimed in claim 5, further comprising the following steps before performing the additional one and additional two mergers by WINHEX: the total byte number of the source code repair file and the damaged video file is subtracted by 8 through WINHEX, and the files are converted into 16-system reverse order to fill in the addresses from 0X04 to 0X 07.

7. The AVI format file structure-based file repair method of claim 1, wherein the opening an AVI repair file using a player, the determining original input size, resolution, bit rate, frame rate information comprising: and opening the combined AVI repair file by using POTPLAYER software, opening a file attribute menu to observe the size change of the video, and determining the original size, resolution, bit rate and frame rate information of the video.

8. The method of claim 7, wherein transcoding the AVI repair file to fill in size, resolution, and frame rate information and output a new AVI file comprises: and carrying out AVI-to-AVI transcoding operation on the AVI repair file through the FormatFactory, configuring the AVI repair file into the observed original size, resolution, bit rate and frame rate information, and outputting a new AVI file.

9. The AVI format file structure-based file repair method of claim 7, wherein the completing the AVI file repair includes: and importing the new AVI file into PR, AE, VEGAS or other video editing software, clipping frames of the video sample file, and completing AVI file repair.

10. A file repair device based on AVI format file structure is characterized in that: comprises that

The coding type determining module is used for determining the coding type of the damaged file;

the source code file manufacturing module is used for manufacturing source code AVI files with the same coding type;

the source code repair file manufacturing module is used for modifying the source code AVI file and generating a new source code repair file;

the merging module is used for merging the source code repair file and the damaged video file to obtain a new AVI repair file;

and the transcoding module is used for transcoding the AVI repair file to complete AVI file repair.

Images