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The term QuickTime also refers to the QuickTime Player front-end media player application, which is built-into macOS, and was available for download on Windows until 2016. I'm not defending how Adobe implemented this change, just saying it's not as much of an absolute show-stopper as some of the other gaping holes in AE's functionality (such as zero support for compressed DNGs or scriptable text formatting).QuickTime is a discontinued extensible multimedia framework created by Apple, which supports playing, streaming, encoding, and transcoding a variety of digital media formats. Just bill them for the time it takes to convert things. Yes of course some people work with lots of old files, or stuff sent by clients who refuse to change, but that's just the cost of legacy same as people insisting every Word document is saved to RTF or every PSD has to be a TIFF. ProRes or DNx) using free third-party tools, and that sources of footage are inevitably moving away from the older codecs as new cameras and recorders come to market, I don't see Adobe spending their development budget on that work. Given that it's usually possible to convert affected footage to a standard mezz codec (e.g. So either Apple does a complete U-turn and resurrects software that it has categorically said is dead and gone, or Adobe has to recreate everything that Apple wrote, from scratch, without stepping on any patents.
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The problem there is that the removed codecs are not part of Adobe's codebase, they were obtained by bundling Apple's QT library (which is EOL for security reasons). Preaching to the choir, but I'll hope for some sort of "use legacy Codec" checkbox in an incremental release.
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