[j0yb0y]

NTSC is 29.97 fps and PAL is 25 fps - PAL was higher resolution because it sacrificed frame rate. (Doesn’t change your point of course)

(Back in the cathode days seeing a TV set in Europe was like going to a strobe show.)

As TFA says (well maybe it was in the comments) there are standard ways of conversion and you pretty much hit them but newer equipment will be able to playback 24fps natively to give the “cinema experience”.

[jstimpfle]

That makes sense, was misremembering those details. There is also a "PAL-60" standard though.

Maybe then what Halo did, was simply to compute 60 frames and throw the last 10 away...