Recovery segment corrupted after MTS video file deletion
The video file is damaged. The recording equipment is a Sony camera. The video format is MTS. It was deleted by mistake. After the deletion, there is no secondary data destruction operation. Neither a new video nor other files have been saved, but the recovered video is It is intermittent, and after a 20-minute content recovery, it turns out to be more than 20 small files, and there are content screens of other dates appearing at the beginning and end of the file.
Fragment Combination Restoration Technology to Solve MTS Video File Problems
This problem is technically difficult. Through code inspection, it can be inferred that this is due to data fragmentation caused by the disk that has not been formatted for a long time. To solve this problem, it is necessary to have a very in-depth study on the MTS video structure. The MTS video structure is different from the MOV or MP4 package. After testing and comparison, the idea of repairing MOV or MP4 video files does not work. By querying the file information of MTS (attached to the file), it is found that MTS is not an MPEG encoding format. Therefore, the connection and combination of frames must be processed according to the coding characteristics of MTS, so as to solve the problem. The following is the MTS video file information for reference and repair:
| Video | |
| ID | 4113 (0x1011) |
| Menu ID | 1 (0x1) |
| Format | AVC |
| Format/Info | Advanced Video Codec |
| Format profile | High@L4 |
| Format settings | CABAC / 2 Ref Frames |
| Format settings, CABAC | Yes |
| Format settings, Reference frames | 2 frames |
| Format settings, GOP | M=3, N=12 |
| Codec ID | 27 |
| Duration | 19 s 120 ms |
| Bit rate mode | Variable |
| Bit rate | 21.3 Mb/s |
| Maximum bit rate | 21.6 Mb/s |
| Width | 1 920 pixels |
| Height | 1 080 pixels |
| Display aspect ratio | 16 |
| Frame rate | 25.000 FPS |
| Color space | YUV |
| Chroma subsampling | 4 |
| Bit depth | 8 bits |
| Scan type | Interlaced |
| Scan type, store method | Separated fields |
| Scan order | Top Field First |
| Bits/(Pixel*Frame) | 0.41 |
| Stream size | 48.4 MiB (89%) |
| Audio | |
| ID | 4352 (0x1100) |
| Menu ID | 1 (0x1) |
| Format | PCM |
| Format settings | Big / Signed |
| Muxing mode | Blu-ray |
| Codec ID | 128 |
| Duration | 19 s 195 ms |
| Bit rate mode | Constant |
| Bit rate | 1 536 kb/s |
| Channel(s) | 2 channels |
| Channel layout | L R |
| Sampling rate | 48.0 kHz |
| Bit depth | 16 bits |
| Delay relative to video | -80 ms |
| Stream size | 3.51 MiB (6%) |