colorspace problem

[feisty2]

I wanna adjust the color of some vids in After Effects
since I have to edit it in AE,so the colorspace will become RGB32 and the original clips are yv12,so when I finish editing video in AE and convert it to yv12 again,there'll certainly cause quality loss
any way to make colorspace conversion like yv12-rgb32-yv12 lossless?
I found a old post here and get these codes

ConvertToYV24(interlaced=true, chromaresample="point")
MergeChroma(PointResize(width, height, 0, 2))
ConvertToRGB32()
... # filtering in RGB32
ConvertToYV12(interlaced=true, chromaresample="point")

but it doesn't work very well,sometimes chroma look "spilling out" and I don't know why
any ideas?

[Gavino]

Originally Posted by feisty2

I found a old post here and get these codes

ConvertToYV24(interlaced=true, chromaresample="point")
MergeChroma(PointResize(width, height, 0, 2))
ConvertToRGB32()
... # filtering in RGB32
ConvertToYV12(interlaced=true, chromaresample="point")

but it doesn't work very well,sometimes chroma look "spilling out"

I recognise that code from this thread.
But is your source really interlaced?

If not, you should instead use the code from post #19 of the thread:

ConvertToYV24(chromaresample="point")
MergeChroma(PointResize(width, height, 0, 1))
ConvertToRGB32()
... # filtering in RGB32
ConvertToYV12(chromaresample="point")

[feisty2]

it's telecined, the clips are from dvd,so is it interlaced type?

[Asmodian]

Do you want to feed RGB32 out of Avisynth to AE?

If you do want RGB32 leave out the final ConvertToYV12.

ConvertToYV24(interlaced=true, chromaresample="point")
MergeChroma(PointResize(width, height, 0, 2))
ConvertToRGB32()

If you can I think it would be better to do IVTC before any color space conversions.

[poisondeathray]

Originally Posted by feisty2

it's telecined, the clips are from dvd,so is it interlaced type?

DVD can be hard telecine (encoded interlaced) or soft telecine (progressive encoded with flags)


Eitherway I would IVTC it (so it's progressive 24p, and use the progressive version of the script) before importing into AE, and use the reverse script after

[feisty2]

I already did ivtc before colorspace conversion
what to do with colorspace is right?

ConvertToYV24(chromaresample="point")
MergeChroma(PointResize(width, height, 0, 1))
ConvertToRGB32()
... # filtering in RGB32
ConvertToYV12(chromaresample="point")

is this right?

[Asmodian]

What are you doing? Let us know your process step by step.

If you are loading a script in After Effects just use:

ConvertToYV24(chromaresample="point")
MergeChroma(PointResize(width, height, 0, 1))
ConvertToRGB32()

Think of After Effects as this line:

... # filtering in RGB32

Use this on the output from After Effects (save as RGB32 in AE):

ConvertToYV12(chromaresample="point")

Originally Posted by feisty2

I already did ivtc before colorspace conversion

Once you do IVTC the video is progressive.

[feisty2]

here the original clip (ivtc only,zoomed to 1600%)

here's the picture after using

ConvertToYV24(chromaresample="point")
MergeChroma(PointResize(width, height, 0, 1))
ConvertToRGB32()
... # filtering in RGB32
ConvertToYV12(chromaresample="point")

something's wrong with chroma,the line I circled out seems "blue"
both

ConvertToYV24(interlaced=true, chromaresample="point")
MergeChroma(PointResize(width, height, 0, 2))
ConvertToRGB32()
... # filtering in RGB32
ConvertToYV12(chromaresample="point")

and

ConvertToYV24(chromaresample="point")
MergeChroma(PointResize(width, height, 0, 1))
ConvertToRGB32()
... # filtering in RGB32
ConvertToYV12(chromaresample="point")

give me this "blue line" thing