StaxRip/AviSynth encoding really slow.

[Vitality]

My code is:

sComb(ntsccombmask=true)
D = QTGMC(Preset="Slower", FPSDivisor=2)
TFM(D2V="VTS_01_1.d2v", slow=2, cthresh=4, mi=25, clip2=D)
TDecimate(mode=1)
FineDehalo(rx=2.0, ry=2.0, thmi=80, thma=128, thlimi=50, thlima=100, darkstr=1.0, brightstr=1.0, showmask=0, contra=0.0, excl=true)

However it's really really slow. It's encoding at 2.38fps, which takes hours at 2 pass. Is sComb() causing TFM to think the frames are all combed and causes QTGMC to deinterlace them all? I usually get like 8-16fps.

[poisondeathray]

My code is:

sComb(ntsccombmask=true)
D = QTGMC(Preset="Slower", FPSDivisor=2)
TFM(D2V="VTS_01_1.d2v", slow=2, cthresh=4, mi=25, clip2=D)
TDecimate(mode=1)
FineDehalo(rx=2.0, ry=2.0, thmi=80, thma=128, thlimi=50, thlima=100, darkstr=1.0, brightstr=1.0, showmask=0, contra=0.0, excl=true)

However it's really really slow. It's encoding at 2.38fps, which takes hours at 2 pass. Is sComb() causing TFM to think the frames are all combed and causes QTGMC to deinterlace them all? I usually get like 8-16fps.

You can use display=true for TFM to see which frames are actually being deinterlaced (it will overlay info and indicate when deinterlace is applied), then adjust the thresholds and settings to fine tune

What is the CPU usage when running that encode? You can try MT to speedup processing if the script is the problem. Or there can be other issues like maybe other bottlenecks, slow encoding settings, hardware I/O issues . You can run avsmeter to help diagnose problems and that can help you tweak things

[Vitality]

My code is:

sComb(ntsccombmask=true)
D = QTGMC(Preset="Slower", FPSDivisor=2)
TFM(D2V="VTS_01_1.d2v", slow=2, cthresh=4, mi=25, clip2=D)
TDecimate(mode=1)
FineDehalo(rx=2.0, ry=2.0, thmi=80, thma=128, thlimi=50, thlima=100, darkstr=1.0, brightstr=1.0, showmask=0, contra=0.0, excl=true)

However it's really really slow. It's encoding at 2.38fps, which takes hours at 2 pass. Is sComb() causing TFM to think the frames are all combed and causes QTGMC to deinterlace them all? I usually get like 8-16fps.

You can use display=true for TFM to see which frames are actually being deinterlaced (it will overlay info and indicate when deinterlace is applied), then adjust the thresholds and settings to fine tune

What is the CPU usage when running that encode? You can try MT to speedup processing if the script is the problem. Or there can be other issues like maybe other bottlenecks, slow encoding settings, hardware I/O issues . You can run avsmeter to help diagnose problems and that can help you tweak things

StaxRip is using 0% of my CPU, and about 132MB of RAM, but "avs2pipemod64.exe" is about 25-30% of my CPU and about 1.2GB of RAM, and x265.exe is using about 10-20% and 200MB of RAM.

[poisondeathray]

run avsmeter to see the fps , and cpu usage for processing the script . You can probably multithread it to speed it up if that's the bottleneck .

for x64

avsmeter64 script.avs

[manono]

Did you try the 'Display=True' addition to TFM as pdr suggested, to see the number of frames being deinterlaced? That CThresh setting is so low that QTGMC will be kicking in all the time and slowing that encode way down unnecessarily.

Is the field matching really so poor that the CThresh has to be so low? Or, alternatively, can you remove that CThresh parameter completely (the default is 9) and use Vinverse for the post-processing?

[Vitality]

Did you try the 'Display=True' addition to TFM as pdr suggested, to see the number of frames being deinterlaced? That CThresh setting is so low that QTGMC will be kicking in all the time and slowing that encode way down unnecessarily.

Is the field matching really so poor that the CThresh has to be so low? Or, alternatively, can you remove that CThresh parameter completely (the default is 9) and use Vinverse for the post-processing?

I removed the sComb() line and the FPS went back to 7. So I think sComb is causing TFM to have QTGMC kick in. I have the sComb line before the IVTC line as real.finder suggested on Doom9. I will see if cthresh at 9 will make it go faster with sComb.

I'm using sComb to remove the rainbowing on my source.

EDIT: Set the cthresh to 9, now it's 3FPS. When everything is removed but sComb it's like 4FPS. So it's 100% sComb doing the the slowdown.

[manono]

So it's 100% sComb doing the the slowdown.

Not exactly. You said 2.38fps with your original script and 3fps with the CThresh changed to 9 and the script otherwise being the same. A roughly 25% improvement. If I understand what you wrote correctly. But, yes, having this sComb in the script accounts for most (75% or so) of the slowdown.

[Vitality]

So it's 100% sComb doing the the slowdown.

Not exactly. You said 2.38fps with your original script and 3fps with the CThresh changed to 9 and the script otherwise being the same. A roughly 25% improvement. If I understand what you wrote correctly. But, yes, having this sComb in the script accounts for most (75% or so) of the slowdown.

No, usually it's like 8FPS. I was getting about 8 with TFM/QTGMC and without sComb. Now it's like 2-3FPS now. On a different DVD show I got upwards of 15FPS using CThresh=4 and QTGMC.

[manono]

No... On a different DVD show I got upwards of 15FPS using CThresh=4 and QTGMC.

A different DVD so apples to oranges

My code is:

sComb(ntsccombmask=true)
D = QTGMC(Preset="Slower", FPSDivisor=2)
TFM(D2V="VTS_01_1.d2v", slow=2, cthresh=4, mi=25, clip2=D)
TDecimate(mode=1)
FineDehalo(rx=2.0, ry=2.0, thmi=80, thma=128, thlimi=50, thlima=100, darkstr=1.0, brightstr=1.0, showmask=0, contra=0.0, excl=true)

However it's really really slow. It's encoding at 2.38fps

Set the cthresh to 9, now it's 3FPS

I think you're contradicting yourself.

[Vitality]

No... On a different DVD show I got upwards of 15FPS using CThresh=4 and QTGMC.

A different DVD so apples to oranges

My code is:

sComb(ntsccombmask=true)
D = QTGMC(Preset="Slower", FPSDivisor=2)
TFM(D2V="VTS_01_1.d2v", slow=2, cthresh=4, mi=25, clip2=D)
TDecimate(mode=1)
FineDehalo(rx=2.0, ry=2.0, thmi=80, thma=128, thlimi=50, thlima=100, darkstr=1.0, brightstr=1.0, showmask=0, contra=0.0, excl=true)

However it's really really slow. It's encoding at 2.38fps

Set the cthresh to 9, now it's 3FPS

I think you're contradicting yourself.

Read my code where I said it was 2.38fps. The CThresh was 4. When I wasn't using sComb it was like 8FPS. 3FPS with the CThresh at 9. This was on the same DVD I'm working with, not the other one that did 15FPS.