The current premiere pro deinterlacer is quite bad, it's extremely slow and some even give better results in much less time. Plugin makers also don't seem to care to make a better version of it, nor or after effects. So I kindly request you, adobe management or whoever reads this, to at least consider the huge advantage this would bring to the few of us who still struggle with projects that mix interlaced and progressive footage. Yes, one could deinterlace firts using an external app into losless files and work with that, but sadly I don't own a supercomputer and a big company like Adobe should't force users to this. My pc being slow is precisely the reason why I care about the speed advantage as well as quality jump there will be if you switch to BWDIF, ESTDIF or QTGMC, all of which surpass your offerings. This should be implemented both for individual clips (frame-based or field-based) as well as for exporting whole projects when using entirely interlaced footage and optic flow. I cannot believe that free software is so ahead of you in this regard, especially since adobe is focusing so much on AI now. Please implement this easy fix, please... no plugin does the job!!