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[gphoto-bugs] [ gphoto-Bugs-1548739 ] thumbnails for Canon DSLR RAW files don't show
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From: SourceForge.net <no...@so...> - 2012-08-16 07:19:13
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Bugs item #1548739, was opened at 2006-08-29 10:00 Message generated for change (Comment added) made by elacour You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=108874&aid=1548739&group_id=8874 Please note that this message will contain a full copy of the comment thread, including the initial issue submission, for this request, not just the latest update. Category: libgphoto2 Group: None Status: Open Resolution: None Priority: 5 Private: No Submitted By: ggg (gerhardkgmx) Assigned to: Hub Figuière (hfiguiere) Summary: thumbnails for Canon DSLR RAW files don't show Initial Comment: In the camera GUI, only jpg file thumbnails are shown and no thumbnails are shown in the cr2 files. This is tested with EOS 350D and 30D. Furthermore there are no image properties or exif data available when selecting the appropriate sidebars. Once the cr2 are downloaded all is well, thumbnails are visible and exif data is complete. Also, when the CF card is accessed through a card reader, all is well. I presume the two bugs has the same root cause, since the exif data cannot be read, the embedded thumbnail is not available either. The following error messages are produced in a shell from which digiKam was launched: digikam: Cannot parse EXIF metadata using Exiv2 digikam: [static Digikam::DImg::FORMAT Digikam::DImg::fileFormat(const QString&)] Failed to open file digikam: [static Digikam::DImg::FORMAT Digikam::DImg::fileFormat(const QString&)] Failed to open file digikam: Size of Exif metadata from camera = 20 digikam: Exif header found at position 0 ---------------------------------------------------------------------- Comment By: Emmanuel Lacour (elacour) Date: 2012-08-16 00:19 Message: I'm seeing this problem to (using gtkam or darktable). With both a canon 500d and 5DMKII using raw only. I can't attach a file to this bug, but you can find samples here: http://manu.home-dn.net/gphoto-1548739/ ---------------------------------------------------------------------- Comment By: Anders Magnusson (d98_ama) Date: 2006-11-04 07:01 Message: Logged In: YES user_id=214898 Stupid question: how do I attach a file? It seems lika all I can do is to submit comments... ---------------------------------------------------------------------- Comment By: Anders Magnusson (d98_ama) Date: 2006-09-20 14:07 Message: Logged In: YES user_id=214898 I have a similar problem with a Canon EOS 30D, but I don't know if it is the exact same problem. When I plug in my Camera GNOME pops up a wizard that lets me import my photos. The Camera is identified correctly, but the wizard says that there are no images available. I get the same thing when I try to import my pictures using gthumb. ---------------------------------------------------------------------- Comment By: Marcus Meissner (marcusmeissner) Date: 2006-08-30 00:25 Message: Logged In: YES user_id=48092 Well, the PTP transfer usually includes a pointer the thumbnail (for JPEGs), which we use. I have investigated a bit, and a CR2 file has a TIFF structure, which in turn has a JPEG preview embedded inf IFD1. tiffdump blub.cr2: .... Directory 1: offset 390952 (0x5f728) next 400497 (0x61c71) JPEGInterchangeFormat (513) LONG (4) 1<391464> JPEGInterchangeFormatLength (514) LONG (4) 1<9033> ... What we could do in libgphoto2 is partial downloads to retrieve the header parts and to extract this JPEG as preview. ---------------------------------------------------------------------- Comment By: ggg (gerhardkgmx) Date: 2006-08-29 12:56 Message: Logged In: YES user_id=1586389 It is digiKam UI But it is definitely a gphoto2 problem, gtkam UI show the same fault as digiKam and Gilles Caulier thinks it is gphoto2. ---------------------------------------------------------------------- Comment By: Hub Figuière (hfiguiere) Date: 2006-08-29 12:48 Message: Logged In: YES user_id=27487 btw which camera UI ? because what you describe is Digikam and digikam is not our problem. ---------------------------------------------------------------------- Comment By: Hub Figuière (hfiguiere) Date: 2006-08-29 12:47 Message: Logged In: YES user_id=27487 I think this has already been discussed. In PTP it looks like we don't fecth the thumbnail from the .cr2 file on Canon. ---------------------------------------------------------------------- Comment By: Marcus Meissner (marcusmeissner) Date: 2006-08-29 12:02 Message: Logged In: YES user_id=48092 can you please attach a sample cr2 file? thanks. ---------------------------------------------------------------------- You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=108874&aid=1548739&group_id=8874 |