Nokia E51 MP4 video format problem

Discussion in 'Professional Video Production' started by Peter, May 15, 2010.

  1. Peter

    Peter Guest

    Peter, May 15, 2010
    #1
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  2. G-Spot says no playback size, video or audio codec info can be found in
    the faulty file. I'd guess at corrupted or missing metadata. Has the fle
    been edited, or did you notice any problem when saving it?

    A Hex Editor shows the same info in the start blocks of the files, but
    totally different info at the end, which I take to mean the faulty file
    has been corrupted while saving at some point. In particular, the file
    creation date and recommended playback size are missing from the
    metadata, so it may just be truncated, as these are the last pieces of
    data to be written. Someone with better Hex editing skills than me *may*
    be able to resurrect it, but it won't be easy.

    From reading about similar problems on various video forums, I'd not be
    too optimistic, unfortunately.
     
    John Williamson, May 15, 2010
    #2
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  3. Peter

    Peter Guest

    It must be corrupted because the phone won't play it either... but
    quite possibly just at the end. I wish someone could help me recover
    it.

    The file was saved to a 4GB micro-SD card which had plenty of room on
    it so the corruption is a mystery. It was not edited.
     
    Peter, May 16, 2010
    #3



  4. tried loading it into virtualdub and then re-processing it as a new video
    file? ( full processing mode ).



    --
    Gareth.

    that fly...... is your magic wand....
    http://dsbdsb.mybrute.com
    you fight better when you have a bear!
     
    The dog from that film you saw, May 16, 2010
    #4
  5. Peter

    Peter Guest

    Frank (and others),

    Many thanks for your detailed reply.

    What I find puzzling is that I have ~ 4MB of mpeg video data and it
    cannot be recovered.

    I did some googling on "moov atom" and there is a lot of stuff out
    there on it, but beyond my capability to follow.

    I can re-create the video but it will cost me about 100 quid. It shows
    an obscure aircraft avionics failure mode which would have been
    valuable to document.
     
    Peter, May 16, 2010
    #5
  6. Peter

    Larry in AZ Guest

    Waiving the right to remain silent, Peter <occassionally-
    > said:
    I attempted to re-encode it to WMV using Super Encoder, and the process
    fails. Sorry...
     
    Larry in AZ, May 16, 2010
    #6
  7. Peter

    Me&Mary Guest

  8. I've had random corruption for unknown reasons on all sorts of media
    over the years. Sometimes all you can do is shrug your shoulders and
    move on.

    In this case, if, as you've said, it's only going to cost a hundred
    bucks or so to re-shoot, I'd recommend that, as if you pay someone,
    it'll probably cost you more even if they fail, and depending how you
    value your time, it'll still be quicker and cheaper to re-shoot than
    fiddle round yourself. The exception, as always, is if you're using it
    as a learning experience so it will be easier next time.

    Sorry I can't be more hopeful.

    In the meantime, I've tried all the programs I know,and come up with
    precisely zero results. The first sections of the two files are
    identical, but as others have said, the video data seems to be
    completely mangled.
     
    John Williamson, May 16, 2010
    #8
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