Frame doubling and motion blur function

[Atak_Snajpera]

I have interlaced footage from NTSC Canon HF100 camcorder and I want to achieve smooth 23.976 fps. In first place I would deinterlace footage to 59.94 fps and then I would need some good function to interpolate to 119.88. My question is which function would you recommend? Is MVflowfps good ?

I also need function which can emulate 1/25 (or 1/30) shutter speed (added motion blur). I need that because interlaced footage at 1/50 shutter speed does not look good after deinterlacing to 25 fps. (Jerky playback)

[Sagekilla]

MVFlowFPS is about as good as you'll get. I'd do something like:


Deinterlacer() # 30i --> 60p
MFlowFPS(num=120000,denom=1001) # 60p --> 120p
MFlowBlur() # Motion blur
# Drop Frames for 120p --> 24p? Or maybe blend?


if you play around with those 3 appropriately you may be able to achieve some good results. Do you have any samples for us to play with?

[Atak_Snajpera]

Yes! I'm uploading now! Thanks!

[Sagekilla]

I can't guarantee this will look good (because I faked having a 30i --> 60p by forcing a 30p clip I had to 60p) but I had some good results with the following:


src = last # Assuming you've already deinterlaced to 60p
blur = 0.5 # Tweak to taste.

super = src.MSuper(pel=2)

bvec = super.MAnalyse(isb=true,delta=1,blksize=8,overlap=4)
fvec = super.MAnalyse(isb=false,delta=1,blksize=8,overlap=4)
src = src.MFlowFPS(super,bvec,fvec,num=120000,den=1001)

super = src.MSuper(pel=2)

bvec = super.MAnalyse(isb=true,delta=1,blksize=8,overlap=4)
fvec = super.MAnalyse(isb=false,delta=1,blksize=8,overlap=4)
src = src.MFlowBlur(super,bvec,fvec,blur=blur)

super = src.MSuper(pel=2)

bvec = super.MAnalyse(isb=true,delta=1,blksize=8,overlap=4)
fvec = super.MAnalyse(isb=false,delta=1,blksize=8,overlap=4)
output = src.MFlowFPS(super,bvec,fvec,num=25,den=1)

return output



I'm pretty sure I may have messed something up a bit though. You'll just need to tweak the numbers (specifically num and den in my 2 MFlowFPS calls) to get it right. It's a bit unwieldy and slow, but it actually worked really well for me

Edit: On another note, you can also try switching the order of the last two calls. Meaning do: FlowFPS --> FlowFPS --> FlowBlur instead of FlowFPS --> FlowBlur --> FlowFPS. You may get better results.

[Atak_Snajpera]

Is FlowFPS compatible with AviSynth MT?

[Sagekilla]

If you use MVTools 2 (which the script above uses) then you should be able to use MT without issue. Only issue is how complex the flow is, which means you may need to use a fairly large cache for it.

[Atak_Snajpera]

25 fps
http://www.sendspace.com/file/se1oz8

29.97 fps
http://www.sendspace.com/file/98m1ug

[2Bdecided]

@Sagekilla,

For 60i > 24p I don't think the final MFlowFPS back to 25 (or 24) is much use - selectevery(something) is good enough once it's blurred.

FWIW I did what the OP wants, but using the old version of mvtools:
http://www.hv20.com/showthread.php?p=26929#post26929

Cheers,
David.