Repair corrupt m4a files

Next, you can see all hard drives as well as connected external hard drives are listed. Please select the one where you have lost the M4A audio files. After then, click "Scan", letting the software scan the target place for the lost M4A audio files. It might take a while for the software to finish the scanning process.

Be patient if you have many files stored and deleted on the hard drive. When it finished, please filter the file type in the left panel and check out the details on the right side. MP3 is one of the most common Audio formats , and almost everyone has used Audio files in this format. Let's take an Audio file in MP3 format as an example to introduce a website that can repair damaged MP3 audio files and show you the steps to repair Audio files.

Step 2 Click the Choose here an MP3 file box on the site. Select an MP3 and click the Open button. Step 4 Select the Repair audio length playtime option. Step 6 Thereafter, the site somewhat confusingly switches to German. Moreover, you can recover deleted corrupted Audio file from iPhone, Android, memory card, flash drive and other removable drives in a short time. Step 1 Free download and install FoneLab Data Retriever , just wait for the software installation to complete and it will run automatically.

Step 2 Select the scanned file type in the main page, because we want to restore corrupted audio file, check the Audio option, if you want to restore other types of files, such as Excel files, check the Document option.

Then select the location where the corrupted file is stored. Step 3 After clicking Scan , the software will automatically scan the checked folder location. Please place the copied file to the same directory as where you placed the above faad. Please copy the broken m4a file to some folder for backup. Start HxD or your binary editor program and open the broken m4a file.

Press R key with Windows key to open the dialog. Type faad. In the command prompt window, type faac. In seconds or minutes, you will find the encoded file named repaired. Please replay the repaired. You could try rewriting the file using ffmpeg with the following command:. Alternatively you may use FAAD and a hex editor e. Find out where the actual data starts in a hex editor. Not always after the mdat entry - there may be alot of zeros in the beginning of the file.

Simply copy everything afterwards to a new binary file, e. For the AAC format, every sample seems to begin with 0x21, which is a hitn that you found the right position. Reaper is a quite successful DAW in opening corrupt and unsupported audio files and may help with this problem. It is not free but has a day unlimited and never expiring trial which will be more than enough for your case. Sign up to join this community. The best answers are voted up and rise to the top.

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Active 3 years, 4 months ago. Viewed 86k times. Improve this question. Michael Hansen Buur 3, 12 12 silver badges 30 30 bronze badges. Jim Jim 1 1 gold badge 1 1 silver badge 3 3 bronze badges. Do you mind posting a link to the file? Links on that site go to a downloadable program for offline: aeroquartet.

Audacity has a "repair" feature in the Effects menu. You might try that. I tried using "treasured", the downloadable programme. What is more it appears mainly aimed again at drumming up business for the expensive repair service those guys are running. That service is probably cheap for professionals, but for a home user it's overpriced and my guess is the fix is pretty basic.