When we see both fields at the same time, that’s called “combing” - like combing your hair.
To see both fields at the same time in Premiere Pro, select the i60 clips in your project and choose Clip > Modify > Interpret Footage. HDV 1080i60 source (that is, 1440-by-1080 1.33 PAR, interlaced, 29.97 source) will work well for this. In the Interpret Footage dialog box, change the Field Order from “Upper Field First” to “Conform to: No Fields (Progressive Scan)”. Ideally, these clips would be used in a Sequence that is 1080p29.97 or 1080p30.
However, in your screenshots, it looked like you are going for thicker scan lines. Is that correct? If so, then use Venetian Blinds. To ease the processing requirement on your computer, you could pre-render the clips with Venetian Blinds baked in. Import a clip, setup the Venetian Blinds, then export. I’d use ProRes 422 LT for this. Repeat until all of your clips have this look baked in and use these as your source in our main project.
A technical note: Don’t summarize progressive 1440-by-1080 1.33 PAR as “1440p”. Use the frame height, not the frame width. “1080i” could be 1920-by-1080 interlaced, 1440-by-1080 interlaced, or 1280-by-1080 interlaced. When summarizing settings, the PAR (pixel aspect ratio) value indicates how wide the frame is. So, Full HD is PAR 1.0, HDV/DVCPro is 1.33, and DVCPro is 1.5. As such, 1080p PAR 1.33 would be correct while 1440p means a taller frame size.
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