this is not true- the opposite is true-You cannot do anything beyond an integer-
none of the exact timings are integers.
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also i believe i see 59.94 when i connect my latest mac mini to a screen using hmdi
and i believe my Kona LHi card shows non integer values including 29.97 for the hmdi output.
aja control panel image attached shows 29.97 on hdmi input and output- from my 5dMk2 camera... in NTSC mode