This sets full trace for the thumbnailer: gsettings set com.canonical.Unity.Thumbnailer log-level 2
If you want to start out with a cold cache, you can run thumbnailer-admin clear Then run a trace on ~phablet/.cache/upstart/dbus.log The trace shows the requested dimensions for each thumbnail. Check whether the dimensions being asked for are correct. If too small, the problem is outside the thumbnailer. If dimensions are as expected, and the video contains embedded cover art, the embedded cover art will be returned scaled down to the requested size; if the dimensions of the embedded cover art are smaller than the requested dimensions, the cover art will be returned at the size it was found in the video. Otherwise, if the video does not contain cover art, the thumbnailer will extract a still frame and return that still frame, scaled down to the requested size. In this case, the only way the image would be blurry if the still frame itself is blurry, or if the video has ridiculously small dimensions. To confirm what's going on, run /usr/lib/x86_64-linux-gnu/thumbnailer/vs-thumb <absolute/path/to/video> video.tiff Then check video.tiff by looking at it with a browser or image viewer. This completely bypasses the thumbnailer and verifies whether the image is being extracted correctly and omits any scaling; the command simply dumps whatever image was found as cover art, or whatever screenshot was extracted. You can also talk to the thumbnailer: thumbnailer-admin get <absolute/path/to/video> This drops the thumbnail at the largest available resolution into the current directory. To request a specific size, use thumbnail-admin get --size=200 <absolute/path/to/video> This adds the image to the cache and returns it (or returns it from the cache if it was cached earlier) after running it through the scaler. man thumbnailer and man thumbnailer-service provide more detail. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1542083 Title: broken video clip has extremely blurry icon when navigating to the camera roll To manage notifications about this bug go to: https://bugs.launchpad.net/canonical-devices-system-image/+bug/1542083/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
