Avisynth help.

[ooze]

Hi!

I need help passing uncompressed audio in an avisynth script. I know that I can use virtualdub to do this step later but it would be easier if I could skip that step.

This is my current script for my pal vhs conversions.

AVISource("D:\Recordings\videohelp.avi")
AssumeTFF()
QTGMC(Preset="Slower", SourceMatch=3)
Crop(8,0,-8,-0)
Spline64resize(768,576)

I prefer not to change colorspace. Using latest AvsPmod and avisynth 2.6.0.3 (dated january 14 2013)

Is there anything you think that I should change in my rather basic script?

A short huffyuv sample of my capture is attached. Captured on a Panasonic nv-hd960 with tbc and 3d dnr on. Through an Pioneer 555hx dvd-recorder to my Hauppauge USB-Live 2.

Capture program used: AmarecTV Live v2.31

Final destination format is mp4 using Handbrake or similar programs

Thx
Hakan

[Selur]

Is there anything you think that I should change in my rather basic script?

assuming your CPU has more than two cpu cores: use Avisynth MT
I would probably:
- add Stab() or another Stabilizer into the script
- add some light denoising filter

Final destination format is mp4 using Handbrake or similar programs

Why the resizing then?

[ooze]

Is there anything you think that I should change in my rather basic script?

assuming your CPU has more than two cpu cores: use Avisynth MT
I would probably:
- add Stab() or another Stabilizer into the script
- add some light denoising filter

Final destination format is mp4 using Handbrake or similar programs

Why the resizing then?

I've heard some people had problems with artifacts using MT so I skipped it.
Just want the best possible quality. I don't know which metod to prefer. Resize in avisynth or in handbrake?

[Selur]

Why resize at all?

[ooze]

The capture aspect ratio is 5:4 (720*576). It must be resized to 4:3 to look ok.

[Selur]

set the pixel aspect ratio properly in the container then.
(also be sure not to mix up Display and Pixel aspect ratio)

[ooze]

set the pixel aspect ratio properly in the container then.
(also be sure not to mix up Display and Pixel aspect ratio)

So quality wise you think it is best to do the resize (change pixel aspect ratio) in Handbrake?

[Selur]

No clue if Handbrake is able to only change the pixel aspect ratio which is only a container flag. (it does no active resizing)
If it is not, I would reencode with Handbrake or whatever tool and later adjust the pixel aspect ratio in the container.

Cu Selur

[sanlyn]

I have no diea what the resize is about. The encoded origional is a 720x576 frame, which is standard for digital DVD (and SD-BluRay and AVCHD as well), which woiuld pklay back on a PAL DVD as a 4:3 frame. Resizing analog loses some quality anyway; also, cropping 16 pixels without restoring borders and stretching to 768 slightly alters the aspect ratio of your original image (the image inside the borders), and you end up with an uncentered bnorder anyway after resize (and did you notice chroma bleed into that right border in later frames?) But that's up to you. 768x576 is not valid for encoded PAL DVD, BD, or standard AVCHD. So I assume you want that frame size for PC-only display or web posting (and some sites might give you ssme flack on the frame size).

Meanwhile I note your original equipoment is playing at inappropriate IRE and gamma settings. The image is washed out and starting to clip bright detail. Image brightness might also be causing more of the chroma bleed and corruption.

original (high IRE and gamma):

[Attachment 19192 - Click to enlarge]

corrected -- but it would be better to capture at correct playback settings. I cropped but replaced borders and centered the image a bit.

[Attachment 19193 - Click to enlarge]

COlorYUV(cont_y=5,off_y=-15,gamma_y=20,cont_v=-30,off_v=3,cont_u=-40,off_u=-8)
Tweak(sat=1.4)

I don't know why "MT" would make anything "better". It might run faster. But in my experience not many filters run in MT mode anyway, and it usually works only on good days with absolutely correct settings. But many enjoy it.

I don't think there's a way to fix the bottom border damage. Some would crop it away, but it's possible that TV overscan will hide most of it.

[Selur]

I don't know why "MT" would make anything "better". It might run faster.

In my book, faster filters which don't cause problems are better.

But in my experience not many filters run in MT mode anyway, and it usually works only on good days with absolutely correct settings. But many enjoy it.

I read here from time to time that some mysterious user has some problems with some even more mysterious filter with Avisynth MT.
Personally I normally use, the following list of scripts and filters, without a problem:

AddGrainC.dll
AGC.dll
ApplyInterlacedFilter.avs
Average.dll
avisynth.dll
aWarpSharp.dll
BlindDeHalo3_mt2.avs
cnr2.dll
ColorBalance.dll
ColorMatrix.dll
daa.avs
DctFilter.dll
deblock.dll
Deblock_QED.avs
Decomb.dll
Deen.dll
defreq.dll
degrainmedian.dll
Dehalo_alpha_mt.avsi
DePan.dll
DePanEstimate.dll
DeVeed.dll
dfttest.dll
DGDecode.dll
DGDecodeNV.dll
DirectShowSource.dll
dither.avsi
dither.dll
EdgeCleaner.avs
EdgeSmoothFast.avs
ediaa.avs
EEDI2.dll
eedi3.dll
faa.avs
FastLineDarkenMod.avs
FFMS2.avsi
ffms2.dll
FFT3DFilter.dll
FFT3dGPU.dll
FineSharp.avsi
flash3kyuu_deband.dll
FluxSmooth.dll
fturn-26.dll
gradfun2db.dll
HQDeringmod_v1.0.avsi
hqdn3d.dll
Hysteria.avsi
ImageSequence.dll
kernel32.dll
libfftw3f-3.dll
LimitedSharpenFaster.avs
LoadDll.dll
Logo.avs
LSMASHSource.dll
maa2.avsi
MaskTools.dll
MosquitoNR.dll
Motion_12Dec05.dll
MotionProtectedFPS.avsi
Msmooth.dll
mt_masktools-26.dll
mt_xxpand_multi.avsi
mvtools2.dll
nnedi.dll
nnedi2.dll
nnedi3.dll
NoiseGenerator.dll
QTGMC-3.33.avsi
RemoveDirt.avs
RemoveDirtSSE2.dll
RemoveGrainHDS.dll
RemoveGrainSSE2.dll
RepairSSE2.dll
SalFPS3.avs
SangNom.dll
SangNom2.dll
SPresso.avs
Srestore.avsi
SSE2Tools.dll
Stab.avs
STpresso.avs
SupCore.dll
SupTitle.dll
TBilateral.dll
TDeint.dll
TemporalDegrain.avs
TIVTC.dll
TMM.dll
Toon-v1.1.dll
unblock.dll
UnDot.dll
VagueDenoiser.dll
VariableBlur.dll
vcomp.dll
VerticalCleanerSSE2.dll
vinverse.dll
VSFilter.dll
warpsharp.dll
yadif.dll
yadifmod.dll

-> What filter do you use that do not work well with 32bit Avisynth 2.6a4 MT?

Cu Selur

[ooze]

Thanks Sanlyn for the input. I've got to try to correct the brightness /gamma then . Thanks for letting me know. Maybe there is a setting in my dvd recorder or the capture card proc amp that can fix it (or make it better).

The material will not end up on discs. Only for pc / ipad /apple tv use.