Not sure why, but I cannot generate thumbnail previews.  Running on TrueNAS 12.0 U4.  See sever log below. 2021-07-11 20:56:47.360 Info App: ProcessRun 'extract-imageseries' Process exited with code 1 2021-07-11 20:56:47.453 Error ChapterImagesTask: Error creating thumbnails for /media/Movies/A Beautiful Mind (2001).mp4 *** Error Report *** Version: 4.6.4.0 Command line: /usr/local/lib/emby-server/system/EmbyServer.exe -os freebsd -ffmpeg /usr/local/bin/ffmpeg -ffprobe /usr/local/bin/ffpr