GNOME Bugzilla – Bug 753930
tag: add GST_TAG_CAPTURING_FOCAL_LENGTH_35_MM and handle it in exiftag
Last modified: 2016-06-20 22:28:16 UTC
Exif metadata has a field to store the 35 mm equivalent focal length which is often use in photography. Currently, we don't support it in tag library. I propose to add a new tag in it to handle this field.
Created attachment 309819 [details] [review] tag: add GST_TAG_CAPTURING_FOCAL_LENGTH_35_MM tag New tag is named GST_TAG_CAPTURING_FOCAL_LENGTH_35_MM and is stored in a double value to be consistent with GST_TAG_CAPTURING_FOCAL_LENGTH.
Created attachment 309820 [details] [review] exiftag: handle GST_TAG_CAPTURING_FOCAL_LENGTH_35_MM tag Note that associated exif tag is stored in a short, so that a precision loss occurs but I think it's better to have it as a double in GstTag for display and to be consistent with focal length.
ping ?
Sorry for the delay here. Patches merged, just added a Since marker to the tag documentation. Thanks! commit 928bb3b6f4bcaf7d819f369ec4d85a281df08c6a Author: Aurélien Zanelli <aurelien.zanelli@darkosphere.fr> Date: Fri Aug 21 10:40:33 2015 +0200 exiftag: handle GST_TAG_CAPTURING_FOCAL_LENGTH_35_MM tag This tag match the EXIF_TAG_FOCAL_LENGTH_IN_35_MM_FILM exif tag and is stored on a short. Hence there is a precision loss compared to the GstTag which is a double value. https://bugzilla.gnome.org/show_bug.cgi?id=753930 commit c5a4a8382886e3cabc70f0e8afd4040745ffa34f Author: Aurélien Zanelli <aurelien.zanelli@darkosphere.fr> Date: Fri Aug 21 10:39:36 2015 +0200 tag: add GST_TAG_CAPTURING_FOCAL_LENGTH_35_MM tag It is the 35 mm equivalent focal length of the lens, mainly used in photography. Tag value is stored in a double value to be consistent with GST_TAG_CAPTURING_FOCAL_LENGTH. https://bugzilla.gnome.org/show_bug.cgi?id=753930
*** Bug 767881 has been marked as a duplicate of this bug. ***