Import your raw video into Media Encoder and export as a Sequence to whatever image format you want. You can go as low as 1 frame per second. Then import the frames into Premiere and add to a sequence at whatever duration you like. You can then make a nested sequence if you want to adjust the speed.
Note when you try to drag the frames to a sequence premiere may do it in numerical order(1,10,11,12…2,20,21…), not actual order (1,2,3,4,5…). you may want to rename the files so they are 000000, 000001…etc. Google ‘bulk rename utility” for a handy app I use a lot.
This method avoids having to import the raw footage into Premiere, conform, index, render, export, reimport – you will need a lot of coffee.
Mike Cohen