AVCHD - MTS Recovery

Advanced recovery for corrupted or deleted AVCHD / MTS video

CnW Recovery software recovers long video sequences

AVCHD Recovery, MTS and M2T Recovery

High definition video cameras often use AVCHD (.MTS) as a standard for video, often stored on SD memory cards.  AVCHD files are also MTS files. Standard recovery programs often generate thousands of small fragments - CnW software goes several stages further for near perfect recovery. Cameras often use FAT32 so a deleted file looses it’s fragmentation data.  As files are long, many can be fragmented.  This CnW wizard works to overcome this problem by scanning the whole memory chip and joining all logically contiguous sections together.  The result is very close to the original number of files.  A competing software product, scanning a chip produced about 500 clips, while CnW correctly recovered just the 57 original  fragmented clips.  Each of these new clips consisted of several sections, joined together.  This feature is probably unique for a data recovery package.  Don’t accept a recovery with thousands of files when you only require tens or hundreds. Download free demo

AVCHD stores several types of files, including a .cpi and .mpl file.  Fortunately, although CnW will recover these files, they are not totally required as a video file (.MTS) can be viewed with Windows 7,8,10 media player.

The recovery process is in three stages.  The first the complete disk is scanned to log the start of every possible .MTS cluster, and also to find and extract .cpi and .mpl files.  The second stage is to examine the database of all MTS clusters and join them into sequential runs. The joining routine checks several parameters to attempt to get a corrrect match, rather than a false positive.  It even allows for memory chips that have video recorded at different resolutions. The final stage joins the short clips into longer related runs.  The process can take maybe 1 hour for a 32GB chip, and is fastest if an image of the chip is take, and the disk image processed, rather direct reading of a memory chip.

The final result is a series of .MTS or .M2T files that are contiguous, and actually the correct length.  The .CPI and .MPL files are also saved as the correct length, with the directory structure below.  However, the .cpi files will not the correct names, and so are saved for reference only.

  • AVCHD
    • BDMV
    • CLIPINF
      • .cpi files
    • PLAYLIST
      • .mpl files
    • STREAM
      • .mts files

To view the recovered files, programs such as Windows Media Viewer on Windows or later7 works, or they can be copied back to the original memory chip and inserted into the camera.  The camera will then re-index the files, and they can be viewed as normal video. NB, NEVER copy back to memory chip until a complete image of the original chip has been taken.

Success rate

    With a new routines on V3.87 a very high success rate has been achieved.  On one chip where videos had several fragments, all fragments were correctly recovered.  Free technical support is always available when any user has problems with recovery.

Video preview

    Starting with V4.48 (not XP systems) the program will show some previews of the video frames found - even on the demo system.  This  will help indicate that video will be recovered with the licenced copy.

M2T

    Support for M2T started with V5.07 (Feb 2016).  Currently thumbnails are not generated.

Summary

    Many software products claim to recover AVCHD / .MTS files but most - if not all - recover short fragments rather than complete files.  Make sure you evaluate CnW Recovery to see if the final file count is close to what is expected.

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