Incompatible jpeg?

Discussion in 'Digital Cameras' started by Martin ©¿©¬ , Jun 27, 2008.

  1. Hi
    I have a Canon IXUS 70 Digital Camera and each time I remove the
    memory card, put it in the PC, copy the pics, put the card back in the
    camera to view the pics, a message comes up for a lot of them saying
    'incompatible jpeg'

    Would anyone know what is happening between taking the card out &
    putting it back in the camera please?
    Martin ©¿©¬ , Jun 27, 2008
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  2. How/what software do you use to copy the pics? It is likely that
    thumbnails of the images are being created and being written back to the
    card. I would hope/expect that the jpegs are not being modified, but
    that is possible. More than likely the camera is complaining about
    thumbnails created to view images.

    Clair Johnston, Jun 27, 2008
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  3. Martin ©¿©¬

    Ofnuts Guest

    Same here, but at that point it becomes almost a matter of religion,
    like operating systems, text editors, Internet browsers...
    Ofnuts, Jun 28, 2008
  4. Thank you all for your replies
    My pictures are downloaded via a card reader on my PC or Laptop and
    then they are copied to a folder on my hard drive

    I make no alterations or adjustments before removing the card &
    putting it back in the camera.
    Martin ©¿©¬ , Jun 28, 2008
  5. Non sequitur!

    In the same vein as: Politicians see no need to be prudent because they
    are not spending _their_ own money ; Students, faculty, and staff see no
    need to be careful because they are not (ab)using _their own_ cameras.
    (Been there...)

    Amongst all my friends and colleagues I have only seen 1 (one) bent pin.
    And, this was on a friend's camera that she *lent to her B-I-L* !
    With some dentals tools that I have in my kit, I was able to carefully
    straighten out the (CF) pin for her. The camera is still in service.
    Allodoxaphobia, Jun 29, 2008
  6. Nuts! How do you manage multiple cards without removing them from the
    Easiest way to do that is to plug the card into a decend card reader.
    No fumbling around with connector cables ("Where the f*** is that cable
    again?" I just had a teen breaking into tears because he was going to
    Now York for 5 weeks and couldn't find that cable.), no trying to pry
    those tiny rubber plugs from the connector in the camera ---and then
    tearing them off and loosing them, no crawling under the desk trying to
    find a vacant USB port, ...
    And the transfer is way faster, too, and doesn't require any proprietary
    software, either(*).

    *: Yes, many cameras can be switched into mass storage device mode, but
    many can not.
    And what's the difference between removing and plugging back a memory
    card versus plugging in and removing one of those tiny USB plugs? If at
    least all camera manufacturers would use a standard USB or micro USB
    socket. But no, many created their own proprietary formats, incompatible
    with anything else and even more fragile to make sure, the customer is
    "loyal" to their brand.

    Jürgen Exner, Jun 29, 2008
  7. Me too, in the sense that I've been using CF cards a lot as
    transferrable data storage ever since they were invented, with no
    trouble at all. I've also been using ink pens and sharp knives for
    many decades without any trouble. But I do know that there are people
    who can't use a pen without serious risk of an inky mess or a sharp
    knife without cutting themselves. They're not the kind of people you'd
    want to lend a camera or indeed a CF card to.
    Chris Malcolm, Jun 29, 2008
  8. Martin ©¿©¬

    Ray Fischer Guest

    USB card readers are about $30. But if you need an excuse to upgrade,
    just pretend I didn't write that.
    You don't need Canon's software to read images off of the memory card.
    You can just treat it as an external disk and copy the files.
    I'm guessing that the "incompatible" ones are thumbnail images.
    Unknowable. It depend upon what you did. But probably not.
    USB cards for PC are pretty cheap. Under $20. If it's not a software
    issue then you could try putting in a new card.
    That'd work too.
    But at $1 per picture, good or bad, it cost a bit more.
    Ray Fischer, Sep 20, 2009
  9. Even less than that! I got one in a local shop (Poundland) for £1 (~$1.50?)
    it works fine even with SDHC and USB-2 (about 10MB/sec anyhow). It's a tiny
    device that plugs directly into the USB socket.
    Marty Freeman, Sep 21, 2009
  10. No, cameras are really picky about jpeg formats and will often only display
    ones they made themselves. Also it could be that if the filename isn't in
    the expected form (usually a letter followed by 7 digits) it might not be
    recognised. If you alter an image in any way and save it back to the card
    then often the camera will no longer be able to read either the thumbnail,
    the image, or both. Sometimes you will see a black thumbnail but when you
    select it the image appears, sometimes it's the other way round, or neither

    It sounds like your software altered the image files or perhaps saved
    copies back onto the card or something. As the other poster said, you don't
    need to use proprietary software with a card reader, simply treat it as a
    disk drive and copy the files off onto your hard disk, eg. by selecting the
    images folder on the card (usually called DCIM or the maker's name) and
    dragging it to your hard disk.

    The only way to find out what has happened is to put the card back into a
    card reader on a computer and see what's on it.
    Marty Freeman, Sep 21, 2009
  11. Martin ©¿©¬

    Ray Fischer Guest

    Well, yes, but I was thinking about a multi-format reader supporting
    USB 2.0 high speed and of decent quality.
    Ray Fischer, Sep 21, 2009
  12. Get some new cards. Don't touch the one you have now until you get your
    new Mac. You should be able to off load every thing that's there, and
    make sense of what you have.
    John McWilliams, Sep 21, 2009
  13. Martin ©¿©¬

    Martin Brown Guest

    Gold plated and with diamond studs in the top?

    Even in the UK where we are seriously ripped off for hitech goods it is
    hard to pay more than about £10 for a decent multistandard USB2 card
    reader. The cheapest full spec USB2 units are about half that. I would
    not expect to pay more than the same number of dollars in the US.

    Anyway the OP seems to need a new USB2 peripheral card since it is his
    USB ports that have stopped working (also about a tenner).

    Hard to say whether images were damaged by the other computer. Other
    possibilities are that rotating them would make the aspect ratio confict
    with the cameras display - and some software adds spurious files to
    media that it is asked to browse (PSPros *.JBF Dozes *.DB for instance)

    I have never seen one that adds a bogus file for every original image.

    Martin Brown
    Martin Brown, Sep 21, 2009
  14. Lots of stuff invents a little thumbnail image for each large jpg
    files to make visual browsing faster.
    Chris Malcolm, Sep 21, 2009
  15. Martin ©¿©¬

    Ray Fischer Guest

    I have several cheap USB readers. They're all crap. I spent money to
    buy a good one and it's fast and reliable.
    It's been my experi3ence that if you mention a price that's too low
    then some people will whine that your price is too low, and if you
    mention a price that's too high then some people will whine that your
    price is too high.

    Quit whining.
    Ray Fischer, Sep 22, 2009
  16. Martin ©¿©¬

    John Turco Guest

    Absolutely correct...multi-format memory card readers (both internal and
    external) are very inexpensive, here in the USA. (I prefer generic internal
    models, personally.)
    <edited for brevity>

    They're quite affordable, also. Again, generic is the way to go, provided
    that the USB card in question contains a superior NEC chipset.
    John Turco, Oct 31, 2009
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