v0.21.2 bugfix relase

Changes since 0.21.1:

• Restore bitrate limiting for video conversion.
• Preserve quality when resizing videos.

v0.21.1 bugfix relase

Changes since 0.21.0:

• Increased video quality by prefering constant quality over bitrate limits.

v0.21.0 feature relase

Changes since 0.20:

• Dropped support for Python 3.5.
• Requires at least Pillow 8.2.0.
• Added configuration option for video keyframe interval.
• Improved video quality control.

v0.20.1 bugfix relase

Changes since 0.20:

• Workaround an issue that prevent documentation from being published on readthedocs.io because they are using an older version of Sphinx.

v0.20 feature relase

Changes since 0.19:

• Added configuration of default options for images and videos.
• By default Zopfli is not used anymore for PNG images.
• Improved FFmpegProcessor.can_read().

v0.19 feature relase

Changes since 0.18:

• Drop Python 3.4 support.
• Added type hints.
• Replace py3exiv2 library by piexif library for processing Exif metdata.
• Improved multi-threading for VP9 video codec.

v0.18 feature relase

Changes since 0.17.1:

• Remove Guetzli for JPEG optimization. It is much too slow for production workload.
• Set JPEG quality to 80%.
• Improved tests for images

v0.17.1 bugfix relase

Changes since 0.17:

• Added missing support for grayscale images with alpha channel
• Slightly increased quality level from 80 to 85 for JPEG optimization
• Improved test coverage for images with alpha channel

v0.17 feature relase

Changes since 0.16:

• Guetzli is used to optimize JPEG compression
• Zopfli is used for PNG images to optimize compression
• Improved SVG optimization
• Improved test coverage for images with palette color space
• Fixed size calculation in PillowProcessor.resize()

v0.16 feature relase

Changes since 0.15:

• Added basic shrink operator to SVGProcessor
• Improved support for SVG