Any news about a potential successor to VVC / H.266?

[rwill]

Originally Posted by kurkosdr

If memory serves me well, a "field-picture" encodes a pair of interlaced fields (top and bottom field). Basically, in MPEG-2, in interlaced mode, you can either have a picture encoded as a progressive frame or as a pair of fields. The first type of picture is useful for "fake interlace" (needed to get a 25p video on DVD-Video because DVD-Video doesn't support progressive mode for example) or for scenes with zero motion in true interlaced video, and the other is for scenes with motion in true interlaced video.

Note: when I say "true interlaced video" I mean the kind of interlaced video that would give you those annoying comb artifacts during motion if you tried to weave/overlay its field-pairs into frames.

If so, does it mean y262 can't encode true interlaced video?

You have not understood interlaced support in Mpeg-2.
y262 can encode interlaced content just fine.