Can you post an example of your corrupted jpeg file?
On Sat, Jan 4, 2014 at 4:53 PM, Elle Stone <ellest...@ninedegreesbelow.com>wrote: > On 01/04/2014 04:27 PM, Phil wrote: > >> Hi All >> >> Apologies to all for not starting a new thread, i have been an avid >> reader of the emails for a while now, and read most of what people put >> here, so sorry Michael & Jay who pointed that out to me.. >> >> ill try and answer all questions about whats what etc. >> >> I believe the original pictures, that were taken in 2011, were taken >> directly of the camera via USB cable, these were then stored on my >> friends computer, and these were corrupted. I didnt notice it much at >> first, as she asked me to look at something different (spamware), but >> her screen saver, which must have read the pic folder, showed pictures, >> that looked to be corrupted, i initially thought that these were to big >> for the screen saver to handle, and dismissed them. >> >> She still had the memory card, and the thumbnails, still showed fine on >> camera preview screen, so she thought they were safe. But luckly, she is >> not an avid photographer, and didnt even wipe the card! After that, i >> Borrowed the card, and used photorescue (it saved me once so i was more >> than happy to pay for it after my canon 350d corrupted a card that was >> not quick enough), and it again found the same pictures corrupted. >> >> So then began my quest for finding information/utilities to undo/correct >> the files. >> >> The Card reader is my own, that i ran the software recovery on, so with >> the fact that since she has bought a new memory card, and it worked >> fine, i assume its a faulty card? so i took a copy of what she had. >> >> DSC0001.jpg seems to be fine, this is the first card picture on the >> card, i dont know if any were taken before, ie new card or new camera, >> but i could find out if needed. DSC0002.jpg, that is ooo 75% ok, but >> after that, all the remaining 221 pictures are damaged, all only showing >> about 5%. >> >> I ran imagemagick "mogrify -strip name-of-file.jpg", that ella >> suggested, and it gave me a comment unsupported marker type 0x3a >> 'dsc0002.jpg' @warning/jpeg.c/jpegerrorhandler/313. >> >> I did try loading into Gimp 2.8.2 on debian 7.2 after the imagemagick >> command, and it also said this message (i thought i had tried it on >> linux but obviously not), OSX 10.6 running gimp 2.8.3 didnt give the >> same error message, and im sure windows 7 running gimp 2.8.6 (from >> memory) also didnt give the handler error. >> >> From what little research that i have done since, the error is quite a >> complicated one. Something to do with data strips ending in FF D9 in a >> hex editor. The 0001 file has 3 of these, the other 2 that i have tried >> only have 1 reference (from searching the file). >> >> Ella's other suggestion for converting from jpg to png, i entered >> "convert DSC0002.jpg test.png" and it converted the image, with the >> corruption, with no error's reported, also tried dsc0001 and it >> converted fine (but the original image was ok). >> >> Im assuming meta data is not transfered to a PNG, ill be honest, i dont >> know much about them, as most of my work is saved back out as JPEG's >> etc, apart from when exporting from inkscape, which prefers PNG's/Tiffs >> etc. >> >> > Hmm, well, it does sound like file damage rather than just a case of > messed up metadata or a version of jpeg that imagemagick can read and other > image editors can't. Perhaps someone else can help. I don't know anything > at all about recovering damaged image files. > > If the thumbs are intact, this page: > http://ninedegreesbelow.com/photography/exiftool-commands.html#extract > tells how to use exiftool to extract the thumbnail as a separate image > file. As always, work on a copy of the original. > > Good luck! > > Elle > _______________________________________________ > gimp-user-list mailing list > List address: gimp-user-list@gnome.org > List membership: https://mail.gnome.org/mailman/listinfo/gimp-user-list > List archives: https://mail.gnome.org/archives/gimp-user-list > _______________________________________________ gimp-user-list mailing list List address: gimp-user-list@gnome.org List membership: https://mail.gnome.org/mailman/listinfo/gimp-user-list List archives: https://mail.gnome.org/archives/gimp-user-list
