Once (I don't remember which version od DK it was) the thumbnails for mts video files were generated ok. But 'recently' (5.5.0 from kubuntu packages) it stopped working. I have tried appimage version 5.9 and the same there. The output: ...... digikam.metaengine: Cannot load metadata from file (Error # 11 : /mnt/domek/foto/2018/2018-05/2018-05-02_19.20.58.mts: The file contains data of an unknown image type digikam.general: Trying to load Embedded preview with libraw digikam.rawengine: Failed to load embedded RAW preview digikam.general: Trying to load half preview with libraw digikam.general: Trying to load Embedded preview with Exiv2 digikam.metaengine: Cannot load metadata using Exiv2 (Error # 11 : /mnt/domek/foto/2018/2018-05/2018-05-02_19.20.58.mts: The file contains data of an unknown image type digikam.dimg: "/mnt/domek/foto/2018/2018-05/2018-05-02_19.20.58.mts" : QIMAGE file identified digikam.dimg.qimage: Can not load " "/mnt/domek/foto/2018/2018-05/2018-05-02_19.20.58.mts" " using DImg::QImageLoader! digikam.general: mimetype = "" ext = "MTS" digikam.general: Cannot create thumbnail for "/mnt/domek/foto/2018/2018-05/2018-05-02_19.20.58.mts" digikam.general: Thumbnail is null for "/mnt/domek/foto/2018/2018-05/2018-05-02_19.20.58.mts" I'm on kubuntu 16.04 where gwenview shows the thumbnails. Regards Piotr
The log is not complete, next would be the call of the video thumbnailer. In digiKam-6.0.0 we use a new FFMpeg thumbnailer. Please test the pre-release AppImage from here: https://files.kde.org/digikam/ Maik
Tested and it works. So DK 6.x generates thumbs from mts files. Strange, that the latest 5.x versions of DK have regression in that area. P.