I once downloaded all the PAL sequences (1 .. 10). A few are progressive (#1 is even a "long still" - but e.g. QuEnc gets crazy about that content), but most are interlaced.
scharfis_brain told me, especially "short shutter" material is hard to compensate, because such algorithms seem to rely on the last bit of motion blur during one field. And computer generated frames often have a duration of 0, not (near) 1/fps seconds - no motion blur at all.
Another "killer" is the "rugby game" (#9), which might also have short shutter, and in #6 - Formula 1 - scharfi told me about possible flaws in the { hoarding | perimeter advertising } ("FOSTERS").
Here a short overview over the VQEG sequences:
ftp://ftp.crc.ca/pub/crc/vqeg/TestSequences/Reference/
1: Tree (25p, long still)
2: Stadium (50i)
3: Harping (50i)
4: EBU Ant (50i, CG)
5: Kayak (50i)
6: Formula 1 (50i) -- btw: M. Schumacher does fail sometimes...
7: Fastfood (25p)
8: Scroller (50i, CG)
9: Rugby (50i; short shutter?)
10: Toy train (50i)
If someone prefers, you may add NTSC clip descriptions here, too. But unfortunately, the download there is sloooowwww (and the files are huge, because they are plain UYVY).
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Okay - just downloaded the NTSC files, too:
13: Fun fair (TC)
14: Skyscrapers (60i)
15: Toy train (60i - similar to 10)
16: Jungle (30p, CG)
17: Letters (2x15p)
18: Waterfall (60i?)
19: Football (60i)
20: Sailing ship (? - too less motion)
21: Blonde@phone (60i)
22: Flowers+leaves (60i)