Shotcut 21.01.29

What's new in this version:

Fixed:
- image skewed with odd width when using certain combinations of filters and transitions (broken in v20.11)
- being unable to pick transparent black in filters with color pickers (broken in v20.11)
- some tooltips in Timeline, Filters, & Keyframes not showing on multi-monitor systems (broken in v20.10)
- Zoom in Scale, Position & Rotate does not always default and undo at 100% (broken in v20.10)
- crash with files having more than 32 multiplexed streams
- quality-based VBR encoding with the VP8 Export > WebM preset
- leading zeros for seconds in Timer video filter with MM:SS.SSS or SS.SSS formats
- support for explicit fractional high DPI (e.g. --QT_DISPLAY_SCALE 1.5)
- bad text formatting when File > Open a plain text file in Text: Rich filter
- drag-n-drop from Playlist when a project (MLT XML clip) is in Source player
- using the numeric keypad for some shortcuts
- selecting the same filter Preset again
- Export File does not check for missing files

- Upgraded Qt to version 5.15.2 for Linux & Windows and 5.12.10 for macOS
- Improved the playback speeds of fast forward and rewind
- Changed Playlist to not automatically start playback when add to playlist of empty project
- Finished converting Timeline, Filters, & Keyframes to Qt Quick Controls 2 API
- Changed keyframe interpolation Discrete to Hold

Improved multi-threaded performance of video track blending and video filters:
- Alpha Channel: View
- Chroma Key: Advanced
- Chroma Key: Simple
- Elastic Scale
- Key Spill: Advanced
- Key Spill: Simple
- Levels
- Mask: Apply
- Noise: Keyframes
- Posterize
- Saturation
- Unpremultiply
- White Balance

Added:
- Use Higher Performance Waveforms to Timeline and Keyframes menus (default on)
- a red outline around the thumnbail of the currently opened Playlist item
- video filter Reduce Noise: Quantization
- support for AV1 decoding and encoding
- Color space and Color transfer to Properties > Video

an Advanced mode to the Convert to Edit-friendly dialog with:
- Deinterlace option (bwdif) that outputs one frame for each field
- Override frame rate and Frame rate conversion with Blend and Motion Compensation options
- Convert to BT.709 colorspace that provides HDR-to-SDR tonemapping
- detection of a HDR transfer function (ITU-R BT.2020 or SMPTE ST2084) to automatically show Convert dialog