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QT Player in Catalina
Evidently QT Player is getting some pro features in Catalina.
https://www.apple.com/macos/catalina-preview/features/
From this page:
Picture in Picture (PiP)
With a single click in the navigation controller, you can play video in a resizable window that isn’t blocked by other windows, allowing you to watch while working on other things.Enhanced Movie Inspector
The Movie Inspector pane shows you even more in-depth technical information about the currently open media file. See key details such as video color space, HDR format, bit depth, scale, and aspect ratio.Open Image Sequence
Create an H.264, HEVC, or ProRes-encoded movie file by navigating to a folder of sequentially numbered images, then choosing your desired resolution, frame rate, and encoding quality.Timecode support
When QuickTime Player opens a media file with embedded timecode, it shows the time information in the onscreen navigation controller.Transparent video support
Transparency in ProRes 4444 files can optionally be preserved when exporting to the HEVC format.– Oliver
Oliver Peters – oliverpeters.com