Best way to deinterlace pixelart so that it still looks pixelated?

[LaserBones]

I'm trying to deinterlace an old movie made on the MSX called The Flying Luna Clipper. The entire movie is pixelart. It's ripped from a LaserDisc and is interlaced. The problem I'm having is with interpolation. It rounds off the pixelation. I'm most familiar with Yadif and QTGMC is there another deinterlacer or technique I should use? Any direction would be greatly appreciated. I've attached a clip.

[jagabo]

You need to get a proper 704x480 capture first. That video has been resized to 704x528 incorrectly for interlaced video. The two fields cannot be cleanly separated anymore.

[LaserBones]

You need to get a proper 704x480 capture first. That video has been resized to 704x528 incorrectly for interlaced video. The two fields cannot be cleanly separated anymore.

I have kept my eye out, it's very rare. I was de-scaling with DeBicubicResizeMT(640, 480) and then de-interlacing.

If I did have a normal SD resolution what would be a good way to address keeping the pixelation? I'm just trying to get a more watchable file even if it's not perfect.

[jagabo]

Maybe something like this is what you're looking for:

LWLibavVideoSource("The Flying Luna Clipper (1987) - clip.mkv", cache=false, prefer_hw=2) 
AssumeTFF()
DebicubicResizeMT(352, 480)
SeparateFields()
ConvertToYUY2()
PointResize(704,480)
Interleave(SelectEven(), SelectOdd().Crop(0,0,-0,-1).AddBorders(0,1,0,0))
ConvertToYV12()
AssumeFrameBased()
prefetch(8)

[LaserBones]

Maybe something like this is what you're looking for:

LWLibavVideoSource("The Flying Luna Clipper (1987) - clip.mkv", cache=false, prefer_hw=2) 
AssumeTFF()
DebicubicResizeMT(352, 480)
SeparateFields()
ConvertToYUY2()
PointResize(704,480)
Interleave(SelectEven(), SelectOdd().Crop(0,0,-0,-1).AddBorders(0,1,0,0))
ConvertToYV12()
AssumeFrameBased()
prefetch(8)

That's an interesting idea scaling the width to half. Thank you!