OS: Windows 11 64bit
I noticed that starting with this version, thumbnails for video files default to using a frame at a random location within the file, usually at the very end of the video. Changing the thumbnail settings for "Use embedded thumbnail" or " For video files, extract frame at __ %" then rebuilding thumbnails does not change this: it still uses the end of the video and ignores any pictures I embed into the video file. (These embedded pictures correctly show up in Windows Explorer, however.)
Effect: The thumbnails for most of my video files only show a black screen instead of a recognizable part of the video
To reproduce:
1. Open a directory with a video file, and let XNView MP generate a thumbnail for it
2. Change the settings for "For video files, extract frame at __ %" to a number, i.e., 50%
3. [Optional] Set the "Use embedded thumbnail" option to checked (Assuming the video has an embedded cover image)
4. Rebuild thumbnails for the video file
Actual behaviour (bug): Thumbnail does not change and stays as a black screen / other random frame
Expected behaviour: Thumbnail changes to the frame at the 50% point of the video, or correctly displays the embedded thumbnail (if any).
Thanks to your detailed description I can reproduce