Created attachment 103570 [details] digikam started in a terminal Just installed 5.4.0 from Fedora system rpms. Installed libqtav and qtav-players. My videos play perfectly in qtav-player (and all other video players on my system), but don't play in the preview pane, and when I click on the play button at the top of the thumbnail in digikam I get a player and message that "An error has occurred to show item", then the slideshow continues playing still images. This same behavior happens with all image types (mkv, mp4, mpg, ...). I ran digikam in a terminal session and only get error messages about null thumbnails in the mkv files. Jim Shipman
MKV thumbs are extracted perfectly here. Please try to use instead the current Linux AppImage 5.5.0 pre release for Linux. It's a self executable bundle. No install, no need admin right. It's safe. All is embedded in same file as well. https://drive.google.com/drive/folders/0BzeiVr-byqt5Y0tIRWVWelRJenM Gilles Caulier
Your error messages are normal for videos. The video thumbnailer is not yet called. Please post a longer section of the log. Maik
Same problem than bug #375399. See my comment here : https://bugs.kde.org/show_bug.cgi?id=375399#c1 Gilles Caulier
*** This bug has been marked as a duplicate of bug 375399 ***
Problem fixed with new ffmpeg video thumbnailer from next 6.0.0 release. Gilles Caulier