Framerate conversion (ALL modes)

[Zeul]

I know i am going to open a can of worms here :D , but, I am adding framerate conversion to NuMenu4u and am interested to know what you guys recommend for the following conversions:

PAL 25(progressive) -> film (23.975fps) and vice versa
PAL 25(interlaced) -> NTSC (29.97fps) and vice versa

My understanding is that doing a progressive to interlaced is NOT recommended and therefore will not be an option.

Do you suggest keeping the playlength the same? ie no audio slow/speedup required.

I am deliberatly NOT posting my existing scripts to gain unbiased suggestions.

Thanks for your time
Zeul

[Boulder]

PAL 25(progressive) -> film (23.975fps) and vice versa


The correct way to do this is a speedup or slowdown. That's the way it is done in the Big Business most of the time.

scharfis_brain suggested this method for the other case:

function tmcbob(clip i)
{i.doubleweave().tomsmocomp(-1,5,0)}

xxxsource("video.xxx")
x=tmcbob()
y=x.trim(1,0)
x.mergeluma(y,0.5).mergechroma(y,0.5)
convertfps(50) #or 59.94
assumebff() #for BFF-Out or assumetff() for TFF-output
separatefields().selectevery(4,0,3).weave()