Stutter issue with MP4 files in Avisynth

[Master Tape]

I'm having an issue with MP4 files in Avisynth, where the frames kind of stutter back and forth. I only get this when trying to load an MP4 within the MP_Pipeline. It works fine on Avisynth+. But i wanted to apply specific filters to remove the mosquito noise, since those kind of filters don't seem to work with Avisynth+.

MP_Pipeline("""

### platform: win32
FFMPEGSource2("F:\Video Files\Episode 1.mp4")
MosquitoNR()
### ###
""")
ChubbyRain2()
QTGMC(preset="slow", matchpreset="slow", matchpreset2="slow", sourcematch=3, Lossless=2, TR2=3, Sharpness=0.3, EdiThreads=2, border=true)
Spline64Resize(1280,720)
FineDehalo()
ColorMatrix(mode="Rec.601->Rec.709")

I've attached an example.

[manono]

Looks like the wrong field order to me. What happens if you stick an:

AssumeTFF()

before QTGMC. And if that does nothing, try:

AssumeBFF()

And if that does nothing either, then how about uploading the 'source' before the filtering?

[Master Tape]

Still no change when i add either of those.

[jagabo]

Use LSMASH instead of ffvideosource2 the:

MP_Pipeline("""

### platform: win32
LSMASHVideoSource("source.mp4")
### ###
""")

SelectEven()
AssumeTFF()
QTGMC()

[Master Tape]

Still getting the same problem.

[davexnet]

Still getting the same problem.

That's not helpful at all.
Post your whole script

[Master Tape]

Still getting the same problem.

That's not helpful at all.
Post your whole script

MP_Pipeline("""

### platform: win32
LSMASHVideoSource("F:\Video Files\Episode 1.mp4")
MosquitoNR()
### ###
""")
ChubbyRain2()
QTGMC(preset="slow", matchpreset="slow", matchpreset2="slow", sourcematch=3, Lossless=2, TR2=3, Sharpness=0., EdiThreads=2, border=true)
Spline64Resize(1280,720)
FineDehalo()
ColorMatrix(mode="Rec.601->Rec.709")

[davexnet]

Still getting the same problem.

That's not helpful at all.
Post your whole script

MP_Pipeline("""

### platform: win32
LSMASHVideoSource("F:\Video Files\Episode 1.mp4")
MosquitoNR()
### ###
""")
ChubbyRain2()
QTGMC(preset="slow", matchpreset="slow", matchpreset2="slow", sourcematch=3, Lossless=2, TR2=3, Sharpness=0., EdiThreads=2, border=true)
Spline64Resize(1280,720)
FineDehalo()
ColorMatrix(mode="Rec.601->Rec.709")

My PC is too slow to play your script so I simplified it. Interlaced H.264 in mp4/mkv always seems to have issues
this works for me:

lwlibavvideosource("C:\Users\davex\Downloads\source.mp4")
selecteven()
assumetff()
yadifmod2(mode=1, edeint=nnedi3(field=-2))
spline36resize(720,404).assumefps(25)

[jagabo]

This is one of those problematic "separated fields" interlaced videos that LSMASH and ffVideo have problems with. I don't have MosquitoNR and ChubyRain2 so I commented out those lines.

MP_Pipeline("""
### platform: win32
LSMASHVideoSource("source.mp4")
### ###
""")

SwapFields()
AssumeBFF()
AssumeFPS(25)
Trim(0,132)

TFM()
#ChubbyRain2()
#MosquitoNR()
Spline64Resize(1280,720)
FineDehalo()
ColorMatrix(mode="Rec.601->Rec.709")

1) The first frames is repeated a number of times. That's not uncommon at the start of some videos, especially if they have been trimmed from a longer video.

2) I believe LSMASH confuses the field rate with the frame rate -- so it thinks the video is twice as may frames and the frame rate is twice as fast. It's really 132 frames (including the multi-repeated first frame) of 25 fps video. The frames are interlaced with obvious comb artifacts -- but it's 25p video encoded out-of-phase. Rather than QTGMC() one should use TFM() to recombine fields from the same frame (maybe other parts of the video are real interlaced 50 fields per second though).

3) Some parts of the video suffer from the swap fields problem -- the upper field is below the lower field rather than above it. Hence the SwapFields() and BFF rather than TFF. The video below didn't include that.

Also, I believe MosquitoNR only works properly on progressive frames. ChubbyRain2 can work with interlaced frames but you must specify interlaced. I've moved the around but comment them out since I don't have them and they're not germane to the original jerky video problem. Actually, MosquitoNR appears to be available in a 64 bit version so I don't see the need for MP_Pipeline at all -- you might just have to specify the multithreading mode.

[Master Tape]

I tried adding AssumeFPS(25) before QTGMC, whilst using LSMASH and that seems to have sorted it. Just hope i didn't throw away half the fields by doing so? But video seems to run smoothly after render. My only concern is stated runtime has doubled.

Also, I believe MosquitoNR only works properly on progressive frames. ChubbyRain2 can work with interlaced frames but you must specify interlaced. I've moved the around but comment them out since I don't have them and they're not germane to the original jerky video problem. Actually, MosquitoNR appears to be available in a 64 bit version so I don't see the need for MP_Pipeline at all -- you might just have to specify the multithreading mode.

Oh i see, that must explain why it hasn't been really effective. Curiously when i add MosquitoNR after QTGMC it causes AvsPmod to crash! So it must not play nice with the the 64 bit version. Hopefully there's something else that can remove whatever these artifacts are. Dotcrawl? It's more apparent on red.


[Attachment 55794 - Click to enlarge]

Also how do you specify interlaced for ChubbyRain2?

[davexnet]

Appears to be 50 unique fields - this seems to work:

lwlibavvideosource("C:\Users\davex\Downloads\video(1).mp4")
yadifmod2(mode=1, edeint=nnedi3(field=-2)).assumefps(50)
spline36resize(1280,720)

Of course you can replace yadifmod with qtgmc

[jagabo]

Also how do you specify interlaced for ChubbyRain2?

You could read the docs... http://avisynth.nl/index.php/ChubbyRain2

[Master Tape]

Is there any deinterlacer script that deals with a hybrid source, such as something filmed on video but computer graphics are on-screen at the same time, as with QTGMC it handles the video fine but you get all the squiggly lines, aliasing. I need something that eliminates the shimmering whilst keeping the full 50fps motion of video.

[poisondeathray]

Is there any deinterlacer script that deals with a hybrid source, such as something filmed on video but computer graphics are on-screen at the same time, as with QTGMC it handles the video fine but you get all the squiggly lines, aliasing. I need something that eliminates the shimmering whilst keeping the full 50fps motion of video.

Did you mean static "computer graphics" , or something with motion ?

Did you try masking it ?

Post a sample