2.2

• Convert pillow warnings to logging with filename [:issue:394].
• Catch warnings when reading EXIF data.
• Avoid crash when thumbnail cannot be generated [:issue:401].
• Replace deprecated usage of imp.
• Fix video thumbnail creation when delay > video length [:issue:411].
• Update photoswipe to 4.4.0 [:issue:415].
• Update galleria to v1.6.1 and add new themes [:issue:417].
• Add user_css option to allow easier css customization [:issue:418].
• Allow to specify the sort order per album.
• Add a .nbmedias attribute to get the number of files in an album.
• More options for vieo resizing [:issue:420].
• Fixes for img_format [:issue:421].
• Fix encoding issue with ffmpeg output [:issue:423].