Blending two frames

[kakomu]

I want to take a video clip and insert a blend between the previous and next frames. So, something like this:

ABCD would become AxByCzD
Where x is a blend between A and B and y is a blend between B and C, and so on.

I imagine that a combination of interlacing, deinterlace blending and interleaving could work, but I hope that someone might have a better idea or a dedicated filter to do something like that.

DoubleWeave() plus interleave?

[Sagekilla]

You mean you want to double the frame rate of a clip? Because that's what you're doing. MVTools already has a function (MVFlowFPS) that does this.

MVTools 1.x:

src = last
bvec = src.MVAnalyse(delta=1, isb=true, blksize=8, overlap=4, pel=2, idx=1)
fvec = src.MVAnalyse(delta=1, isb=false, blksize=8, overlap=4, pel=2, idx=1)
src.MVFlowFPS(bvec,fvec,num=yourFrameRate*2, idx=1)

[kakomu]

You mean you want to double the frame rate of a clip? Because that's what you're doing. MVTools already has a function (MVFlowFPS) that does this.
That's exactly what I want to do

MVTools 1.x:

src = last
bvec = src.MVAnalyse(delta=1, isb=true, blksize=8, overlap=4, pel=2, idx=1)
fvec = src.MVAnalyse(delta=1, isb=false, blksize=8, overlap=4, pel=2, idx=1)
src.MVFlowFPS(bvec,fvec,num=yourFrameRate*2, idx=1)


I've used this script before and it produced some undesirable artifacts. Mostly blocking on fast moving areas. I was hoping for a "dumb" blend.

[kemuri-_9]

src
ChangeFPS(last.framerate()*2) # double FPS
overlay(last.trim(1,0),mode="Blend",opacity=0.5) # dump blend
trim(0,last.framecount()-2) #trim off last frame (since it'll be a plain dupe)


should be dumb enough for what you're looking for

[kakomu]

src
ChangeFPS(last.framerate()*2) # double FPS
overlay(last.trim(1,0),mode="Blend",opacity=0.5) # dump blend
trim(0,last.framecount()-2) #trim off last frame (since it'll be a plain dupe)


should be dumb enough for what you're looking for

Thanks. I adjusted the opacity to .3 in order to make the preceding frame more apparent and have less flashing.

[scharfis_brain]

easiest way introducing a plugin motion.dll:
blendfps(framerate*2, aperture=1)

or without an external plugin:

interleave(last,merge(last,last.deleteframe(0)))

[PeaceAnt]

the easiest way is to use only one command:
convertfps (2*framerate)

pozdrawiam

[scharfis_brain]

are you sure that convertfps will really do what you want for this case?

I remember it will complain about too high destination framerates, or that it won't do blending for higher framerates.

[PeaceAnt]

i'm not sure but i use it very often and i didn't notice any problems with that.

pozdrawiam

[vampiredom]

BlendFPS() is only supports decimal framerates. So, if you want to preserve framerates such as 30000/1001, you'll need an AssumeFPS() afterwards. I've also noticed that it doesn't always play nicely with SetMTMode(), so look out for that if you are running MT.

Scharfi's interleave() method is probably the most efficient way to accomplish this.

[Gavino]

are you sure that convertfps will really do what you want for this case?
I remember it will complain about too high destination framerates, or that it won't do blending for higher framerates.
It's the other way round, it complains if you try to slow the rate down too much.
In blend mode, the new rate must not be less than 2/3 of the original rate.

[scharfis_brain]

I just tried it:
changefps(last.franerate()*2)
just duplicates frames. it does not blend them.

[thetoof]

convertfps blends, changefps duplicates

[scharfis_brain]

ah, sorry.

yes you are right, I did a copy'n'paste mistake and didn't look carefully enough before posting.

it seems that convertfps() will do the trick.

[kemuri-_9]

convertfps will generate something very similar (if not exactly the same...) to what i had provided earlier,
but since kakomu adjusted the opacity to .3,
it's no longer reproducible by simply doing convertfps()