digitalFAQ.com Forum - FFMPEG hanging when encoding from Avisynth script?

I am trying to encode a video from Avisynth to FFMPEG but the video hangs each time, whether I encode directly to mp4 or to HUFFYUV. I have tried increasing the buffer size but the video still hangs, at a random frame of the video each time. One time it was frame 150, next time it worked until frame 44,000.

To mp4:

Code:

ffmpeg -i input.avs -c:a mp3 -qscale:a 0 -c:v libx264 -preset slower -crf 18 -profile:v high -pix_fmt yuv420p -tune grain output.mp4

To huffyuv:

Code:

ffmpeg -i input.avs -acodec copy -c:v huffyuv -bufsize 500000k output.avi

In the past, if I managed to get it to the Huffyuv, converting it to mp4 proceeded without issue. I was also able to encode this script successfully using a similar script that did not upscale to HD, but most of my scripts no matter the functions used have this hanging issue with FFMPEG.

Here is my Avisynth script:

Code:

Import("C:\Program Files (x86)\AviSynth+\plugins64+\ReplaceFramesMC2_AD.avsi")

Import("C:\Program Files (x86)\AviSynth+\plugins64+\Deemphasize.avs")



video = AVISource("D:\VW011_before_avisynth_YT_progressive_version.avi")



last = video.ConvertToYV16(matrix="Rec709",interlaced=True)



AssumeBFF().nnedi3(field=-2)



ReplaceFramesMC2_AD(last, 13106,1)

ReplaceFramesMC2_AD(last, 13108,7)

ReplaceFramesMC2_AD(last, 13124,1)

ReplaceFramesMC2_AD(last, 13126,1)

ReplaceFramesMC2_AD(last, 13128,27)

ReplaceFramesMC2_AD(last, 26980,5)



#removes strip on left side

no_stripe =last.DeStripe(2,2,80).Crop(0,0,120,0)

last = Layer(last, no_stripe, op="add")



#center image part 1 to save processing time (no need to apply filters to black areas)

Crop(8,0,-4,-8)



#removes some dropout lines

RemoveDirtSMC(55).RemoveDirtSMC(25).RemoveDirtSMC(55)

FFT3DFilter(sigma=2, bt=5)

SpotLess(RadT=3, ThSAD=5000, Blksz=16)



smoothuv2(radius=3,interlaced=0)



AssumeBFF().SeparateFields().SelectEvery(4,0,3).Weave()





first = last.Trim(0,20472)

#avoids filtering first or ending, will add back at end

second = last.trim(20472,23678)

ending = last.trim(23678,0)



#further filtering of drop outs on dave street segement

second = second.AssumeBFF().nnedi3(field=-2)



second = second.SpotLess(RadT=3, ThSAD=4000, Blksz=16)



second = second.AssumeBFF().SeparateFields().SelectEvery(4,0,3).Weave()





#____________________

final = first ++ second ++ ending



final = final.AssumeBFF().nnedi3(field=-2)



#add back border cropped earlier

final = final.AddBorders(2,0,10,8)



final = final.AssumeBFF().SeparateFields().SelectEvery(4,0,3).Weave()





#deinterlace for YT, remove combing

final = final.QTGMC( Preset="fast", EZKeepGrain=1.0, NoisePreset="Faster", NoiseProcess=0)

final = final.VInverse2()



#upscale to 1080 then add grain

final = final.nnedi3_rpow2(4, cshift="Spline64Resize", fwidth=1440, fheight=1080)

final = final.AddgrainC(var=10)



#Adds Segue

blackVideo = BlankClip(clip=final,length=100)



Clip1 = final.Trim(0,22928)

Clip2 = final.Trim(22928, 0)



editVideo = Clip1 ++ blackVideo ++ Clip2



editVideo = editVideo.Subtitle("Part Two", lsp=10, align = 5, text_color = color_white, size = 120,first_frame = 22929, last_frame=23144)



return editVideo

Any help is appreciated, as I don't know what else to do.

Intel(R) Core(TM) i7-10700K CPU @ 3.80GHz. 16 GM RAM