https://bugs.kde.org/show_bug.cgi?id=522852
Rohan <[email protected]> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |[email protected] --- Comment #2 from Rohan <[email protected]> --- I can reproduce this on Ubuntu 26.04 LTS with Dolphin 25.12.3 and ffmpegthumbs 25.12.3. I found that ffmpegthumbs was not registering the MIME types video/mp4 and video/x-matroska. I built ffmpegthumbs 26.08.0 locally and added those MIME types to ffmpegthumbs.json: video/mp4 video/x-matroska After installing the locally built plugin, Dolphin immediately generated thumbnails for both MP4 and MKV files. As an additional test, Nautilus/Files could generate thumbnails for the exact same video files even when Dolphin could not. Once Nautilus generated the thumbnail, Dolphin was also able to display it. This helped rule out the video files themselves and FFmpeg decoding as the underlying problem. I then configured Dolphin to load the patched plugin and confirmed that thumbnails continued working after a complete system reboot, without launching Dolphin from a terminal first. Both MP4 and MKV were tested before and after the change, and the patched plugin made both work reliably. This seems to strongly suggest that MIME-type registration in ffmpegthumbs is involved in the problem. Perhaps video/mp4 and video/x-matroska should be included in the plugin's supported MIME types by default. System: Ubuntu 26.04 LTS, GNOME, Dolphin 25.12.3, ffmpegthumbs 25.12.3. -- You are receiving this mail because: You are watching all bug changes.
