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  1. so I recorded video using OBS software in MKV format then remuxed them to MP4. I moved them to a Adobe Media watch folder to transcode the mp4 files. I moved in all the mkv files by mistake and without thinking selected all and deleted (doh!) nope, not in recycle bin - perm delete!

    I used 'undeletefiles pro' program to recover the files. Found all the mp4 and mkv files. They all have data on them, but the mp4 are unplayable even with VLC player. Tried to remux again the recovered MKV files no luck

    So question is how can I repair a "recovered" mp4 file? There about 36 files in all. From what I know the encoding or container for the mp4 would be corrupted . Any suggestions?

    I will upload one such file here

    thank you
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  2. Member
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    A quick look at your file with a hex editor (I used HxD) shows that it contains 99.9% binary zeroes.
    Nothing to recover here
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  3. ok, it still shows different file sizes like there is something in the files...
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  4. Member
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    Unfortunately, the size is no indicator of a valid recovery.

    Once a file is deleted, it usually first goes into the recycle bin (did you look there?)
    then when it is deleted from the recycle bin the space is marked as free and
    is immediately available to other programs and Windows itself as new files are written.

    The chances of success are increased greatly if the disk
    was not the system disk and/or you stopped writing anything to that particular volume.
    The amount of overall free space also a factor.
    Try Recuvu, I believe there's a free version

    https://www.ccleaner.com/recuva/download
    Last edited by davexnet; 15th Feb 2020 at 22:42.
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  5. yeah, when i went to delete the files it said too big for recycle bin permanent delete? so yeah massive F up right there. I realize what i did a few min later and used a recovery program to fetch the files (and BTW, almost all the "free" programs will only find the files, you have to pay to recover, or it only recovers a tiny amount for free) So bassically, sounds like I am hosed here
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  6. Member
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    Originally Posted by khoelscher View Post
    yeah, when i went to delete the files it said too big for recycle bin permanent delete? so yeah massive F up right there. I realize what i did a few min later and used a recovery program to fetch the files (and BTW, almost all the "free" programs will only find the files, you have to pay to recover, or it only recovers a tiny amount for free) So bassically, sounds like I am hosed here
    Recuvu was/is a reputable undelete software, however, Piriform was acquired by CCleaner who, in turn, was
    acquired by avast and their reputation has been damaged in recent times with some questionable
    choices they made in their software.

    The free version on the site is the same version I have on my XP box; it is fully functional.
    I tested it by deleting a 68MB RAR file that was in 3 extents; undeleted it using Recuvu to a
    second partition successfully (it unRars without error)
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  7. well I tried the cmd prompt recover method with FFMPEG/recover mp4, and uh, yeah. Dead. so thanks for the help but my brainfart screwed the pooch on this one!

    C:\recover 2\recover\bin>recover_mp4.exe 23-08-27.mp4 result.h264 result.aac --lav
    recover_mp4 v1.92 (C) 2011-2017 Dmitry Vasilyev <slydiman@mail.ru>
    http://slydiman.me

    Writing H264 video file 'result.h264'...
    Video format: AVC video 1920x1080, High Profile, Level 4.0
    Assuming max AVC/HEVC NAL unit size (IDR) 0x3FFFFF, (non IDR) 0xFFFFF
    Used AVC templates: LAV/FFMPEG
    Writing audio file 'result.aac'...
    Audio format: Assuming audio stream is AAC, 44100Hz, 2ch, profile 2
    Assuming min AAC chunk size 0x9E
    Searching 'mdat' atom in '23-08-27.mp4'...
    Cannot find 'mdat' atom in first 64MB of '23-08-27.mp4'
    FATAL ERROR: The file '23-08-27.mp4' cannot be recovered. The entire file is filled by 00 byte!
    Video=0.000
    'result.h264' created, size 51 (0.000%)
    Audio=0.000
    'result.aac' created, size 0 (0.000%)
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