Captured video and audio out of sync (Avisyth & Virtualdub)

[Jupit0r]

If this rather should be in the audio or capture section, please feel free to move it to the appropriate forum.

I have captured video from an old, slightly damaged VHS tape (Lagarith lossless, raw PCM audio) which has correct in sync audio.
Now, when I put it through Avisynth (to deinterlace with QTGMC and do small corrections like re-sizing etc.) and Virtualdub (to convert with H264, audio to AAC or MP3), the audio goes out of sync at a certain point (not from the beginning). I don't have and never had that problem with tapes that played well and basically had no issues to begin with, which went through the same procedure.
I assume, this happens because of the drop outs? Frames are "lost"? I tried to convert the audio track separately and then muxed it with the (converted) video, but that didn't change anything.

Is there a way to avoid or fix this issue? I never messed with the audio/video interleaving in VD - is that something I should look into?

This the media info for both files.
Original:

Format : AVI
Format/Info : Audio Video Interleave
Format profile : OpenDML
File size : 36,8 GiB
Duration : 1 h 24 min
Overall bit rate : 62,4 Mb/s
Writing library : VirtualDub2 build 44282/release

Video
ID : 0
Format : Lagarith
Codec ID : LAGS
Duration : 1 h 24 min
Bit rate : 60,9 Mb/s
Width : 720 Pixel
Height : 576 Pixel
Display aspect ratio : 5:4
Frame rate : 25,000 FPS
Standard : PAL
Color space : YUV
Chroma subsampling : 4:2:2
Bit depth : 8 bits
Bits/(Pixel*Frame) : 5.878
Stream size : 35,9 GiB (98%)

Audio
ID : 1
Format : PCM
Format settings : Little / Signed
Codec ID : 1
Duration : 1 h 24 min
Bit rate mode : konstant
Bit rate : 1 411,2 kb/s
Channel(s) : 2 Kanäle
Sampling rate : 44,1 kHz
Bit depth : 16 bits
Stream size : 852 MiB (2%)
Alignment : Ausgerichtet an Interleaves
Interleave, duration : 40 ms (1,00 Video-Frame)
Interleave, preload duration : 500 ms

Converted:

Format : AVI
Format/Info : Audio Video Interleave
Format profile : OpenDML
File size : 2.50 GiB
Duration : 1 h 24 min
Overall bit rate : 4 246 kb/s
Writing library : VirtualDub2 build 44282/release

Video
ID : 0
Format : AVC
Format/Info : Advanced Video Codec
Format profile : High@L3.1
Format settings : CABAC / 8 Ref Frames
Format settings, CABAC : Yes
Format settings, Reference frames : 8 frames
Codec ID : H264
Duration : 1 h 24 min
Bit rate : 4 100 kb/s
Width : 720 pixels
Height : 560 pixels
Display aspect ratio : 1.286
Frame rate : 25.000 FPS
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Progressive
Bits/(Pixel*Frame) : 0.407
Stream size : 2.42 GiB (97%)
Writing library : x264 core 157 r2935M 545de2f
Encoding settings : cabac=1 / ref=8 / deblock=1:0:0 / analyse=0x3:0x133 / me=umh / subme=9 / psy=1 / psy_rd=1.00:0.00 / mixed_ref=1 / me_range=16 / chroma_me=1 / trellis=2 / 8x8dct=1 / cqm=0 / deadzone=21,11 / fast_pskip=1 / chroma_qp_offset=-2 / threads=6 / lookahead_threads=1 / sliced_threads=0 / nr=0 / decimate=1 / interlaced=0 / bluray_compat=0 / constrained_intra=0 / bframes=3 / b_pyramid=2 / b_adapt=2 / b_bias=0 / direct=3 / weightb=1 / open_gop=0 / weightp=2 / keyint=250 / keyint_min=25 / scenecut=40 / intra_refresh=0 / rc_lookahead=60 / rc=2pass / mbtree=1 / bitrate=4100 / ratetol=1.0 / qcomp=0.60 / qpmin=0 / qpmax=69 / qpstep=4 / cplxblur=20.0 / qblur=0.5 / ip_ratio=1.40 / aq=1:1.00
Color range : Limited
Matrix coefficients : BT.470 System B/G

Audio
ID : 1
Format : AAC LC
Format/Info : Advanced Audio Codec Low Complexity
Codec ID : FF-2
Duration : 1 h 24 min
Bit rate : 129 kb/s
Channel(s) : 1 channel
Channel layout : C
Sampling rate : 44.1 kHz
Frame rate : 43.066 FPS (1024 SPF)
Compression mode : Lossy
Stream size : 78.0 MiB (3%)
Alignment : Split across interleaves
Interleave, duration : 23 ms (0.58 video frame)
Interleave, preload duration : 515 ms

[ProWo]

Post your Avisynth script here.

[Jupit0r]

Post your Avisynth script here.

DirectShowSource("l:\video.avi") 
SetfilterMTmode("QTGMC", 4)
ConvertToYV12()
AssumeTFF()
QTGMC( Preset="Slower", Edithreads=3)
Crop(10,6,-14,-12)
BilinearResize(720,540)
SelectEven()
Levels(0, 1.085, 250, 2, 255)
Prefetch(2)

[ProWo]

Avi files can be problematic. Remux your avi file with Mkvtoolnix into an mkv container and load it into your avisynth script.
DirectShowSource("l:\video.mkv")

[Jupit0r]

OK, will try that out.

[jagabo]

DirectShowSource() is probably your problem -- it doesn't honor Lagarith's NULL frames. You should use AviSource() for Lagarith AVI files. And avoid putting AVC video in an AVI container. Use MKV or MP4 instead.

[Jupit0r]

You should use AviSource() for Lagarith AVI files.

For some reason AviSource() gives an error: couldn't locate a decompressor for fourcc LAGS
Obviously Lagarith codec is installed, since I capture with it.

[jagabo]

You need to install a VFW decoder for Lagarith. The Lagarith installer should have installed that.

[Jupit0r]

I uninstalled it and re-installed it but it doesn't do anything different... is there a way to check if the VFW decoder has been installed correctly?
Could there be conflicts with ffdshow for example (it doesn't show up in any of the settings there)?

DirectShowSource() is probably your problem -- it doesn't honor Lagarith's NULL frames.

btw: Should "Enable null frames" be checked in the VD compression settings? Right now it isn't and I don't think it was before.

[davexnet]

I uninstalled it and re-installed it but it doesn't do anything different... is there a way to check if the VFW decoder has been installed correctly?
Could there be conflicts with ffdshow for example (it doesn't show up in any of the settings there)?

DirectShowSource() is probably your problem -- it doesn't honor Lagarith's NULL frames.

btw: Should "Enable null frames" be checked in the VD compression settings? Right now it isn't and I don't think it was before.

It seems for better compatibility it should be unchecked

[jagabo]

is there a way to check if the VFW decoder has been installed correctly?

If you have an copy of the old VirtuaDub you can go to Video -> Compression and see if Lagarith shows up. VirtualDub2 won't work for this because it includes its own private copy of Lagarith. Also keep in mind that if you are using a 32 bit editor/encoder you need 32 bit AviSynth and a 32 bit VFW decoder. If you are running a 64 bit editor/encoder you need 64 bit AviSynth and a 64 bit VFW decoder.

Could there be conflicts with ffdshow for example (it doesn't show up in any of the settings there)?

I don't think ffdshow includes a Lagarith decoder (VFW or DirectShow) so it should cause a conflict.

Should "Enable null frames" be checked in the VD compression settings? Right now it isn't and I don't think it was before.

The null frames option only effects compression. The VFW decoder always handles null frames properly regardless of that setting. I recommend you leave the option off to avoid this problem in the future.

[Jupit0r]

If you have an copy of the old VirtuaDub you can go to Video -> Compression and see if Lagarith shows up. VirtualDub2 won't work for this because it includes its own private copy of Lagarith. Also keep in mind that if you are using a 32 bit editor/encoder you need 32 bit AviSynth and a 32 bit VFW decoder. If you are running a 64 bit editor/encoder you need 64 bit AviSynth and a 64 bit VFW decoder.

Yes, it just came to my mind too, that I will probably have to install the 32 bit decoder for Lagarith. Will try that later.

Thanks for everybody's input so far, btw!

[Jupit0r]

This installing issue is really doing my head in. I removed the old install and manually installed the 32 bit. Seems like it's been installed fine, since it shows up under my apps.
But I still get the error in AS. Do I have to register the decompressor in AS somehow first? Could this be an issue with AvsPmod (v2.5.1)? *edit Tried v2.6.3.9 as well, with no change.

32bit AS is installed

2020-09-13 10:42:19.232   Log opened. (Time zone: UTC+02:00)
2020-09-13 10:42:19.232   Setup version: Inno Setup version 5.6.1 (u)
2020-09-13 10:42:19.232   Original Setup EXE: D:\Essentials\Avisynth\AviSynthPlus_3.6.1_20200619_vcredist.exe
2020-09-13 10:42:19.232   Setup command line: /SL5="$2A0770,27937480,168448,D:\Essentials\Avisynth\AviSynthPlus_3.6.1_20200619_vcredist.exe" 
2020-09-13 10:42:19.232   Windows version: 10.0.19041  (NT platform: Yes)
2020-09-13 10:42:19.232   64-bit Windows: Yes
2020-09-13 10:42:19.232   Processor architecture: x64
2020-09-13 10:42:19.232   User privileges: Administrative
2020-09-13 10:42:19.238   64-bit install mode: No
2020-09-13 10:42:20.531   Created temporary directory: C:\Users\PMLLR\AppData\Local\Temp\is-9UC7L.tmp
2020-09-13 10:43:34.962   Installing components: main,main\avs32,main\avs64,associations,associations\shellnew,examples,avsmig,avsmig\uninst,custplug
2020-09-13 10:43:34.962   Legacy x86 AviSynth installed: Yes
2020-09-13 10:43:34.963   Legacy x64 AviSynth installed: No
2020-09-13 10:43:34.963   AviSynth+ installed: No

[jagabo]

AviSource() will use the system installed VFW decoder. If AviSynth is 32 bit it will require 32 bit Lagarith. If AviSynth is 64 bit it will require 64 bit Lagarith.

[Jupit0r]

I thought I did that...

AviSynth 2.6.0 / 2.6.1 Alpha (May 17, 2016) - this version is 32 bit, right? I installed that. I have also AvsPmod_v2.6.3.9_.Windows_x86-32 installed.

I also followed the instructions to install the 32 bit Lagarith on Windows 64 bit (Lagarith.dll is now in the SYSWOW64 directory):

Installing the 32bit version on Windows 64
Extract all the files to a folder
Open up a command prompt (start->run: cmd)
Change directories to sysWOW64 ("cd C:\windows\syswow64")
Type the following (replace example_path with the actual path to the extracted files), then hit enter: rundll32.exe setupapi.dll,InstallHinfSection DefaultInstall 0 c:\example_path\lagarith.inf

VirtualDub-1.9.11 shows the codec:
[Attachment 55370 - Click to enlarge]

I guess, I'll have to re-encode everything I have with UTvideo then...

[jagabo]

It looks like you did everything right. Your script is:

AviSource("l:\video.avi") ?

Try using AvsInfoTool to check your AviSynth/filter install.

[Jupit0r]

It looks like you did everything right. Your script is:

AviSource("l:\video.avi")

?

Yep.

Try using AvsInfoTool to check your AviSynth/filter install.

Thanks for the link! There are filter/plugin issues, which I will fix. Probably from the old install. Don't seem to be linked to the LAGS problem though.

[Jupit0r]

I fixed the error, but I'm getting lots of "function duplicates" warnings... is that something to worry about?

[OS/Hardware info]
Operating system: Windows 10 (x64) (Build 19041)

CPU: Intel(R) Core(TM) i5-2500K CPU @ 3.30GHz / Sandy Bridge (Core i5)
MMX, SSE, SSE2, SSE3, SSSE3, SSE4.1, SSE4.2, AVX
4 physical cores / 4 logical cores


[Avisynth info]
VersionString: AviSynth 2.60, build:Mar 31 2015 [16:38:54]
VersionNumber: 2.60
File / Product version: 2.6.0.6 / 2.6.0.6
Interface Version: 6
Multi-threading support: No
Avisynth.dll location: C:\Windows\SysWOW64\avisynth.dll
Avisynth.dll time stamp: 2015-03-31, 06:40:58 (UTC)
PluginDir2_5 (HKLM, x86): C:\Program Files (x86)\AviSynth\plugins


[C++ 2.5 Plugins (32 Bit)]
C:\Program Files (x86)\AviSynth\plugins\LGhost.dll [0.3.0.1]

[C++ 2.6 Plugins (32 Bit)]
C:\Program Files (x86)\AviSynth\plugins\aWarpsharpMT.dll [2.1.3.0]
C:\Program Files (x86)\AviSynth\plugins\CNR2.dll [2016-06-26]
C:\Program Files (x86)\AviSynth\plugins\ConvertStacked.dll [2020-06-19]
C:\Program Files (x86)\AviSynth\plugins\DePan.dll [2.13.1.6]
C:\Program Files (x86)\AviSynth\plugins\DePanEstimate.dll [2.10.0.4]
C:\Program Files (x86)\AviSynth\plugins\DirectShowSource.dll [2.6.0.3]
C:\Program Files (x86)\AviSynth\plugins\ffms2.dll [2020-08-22]
C:\Program Files (x86)\AviSynth\plugins\fft3dfilter.dll [2.6.0.0]
C:\Program Files (x86)\AviSynth\plugins\Ghostbuster32.dll [2019-02-16]
C:\Program Files (x86)\AviSynth\plugins\ImageSeq.dll [2020-06-19]
C:\Program Files (x86)\AviSynth\plugins\LSMASHSource.dll [2020-07-27]
C:\Program Files (x86)\AviSynth\plugins\masktools2.dll [2.2.26.0]
C:\Program Files (x86)\AviSynth\plugins\msharpen.dll [2013-11-30]
C:\Program Files (x86)\AviSynth\plugins\mvtools2.dll [2.7.43.0]
C:\Program Files (x86)\AviSynth\plugins\nnedi3.dll [0.9.4.57]
C:\Program Files (x86)\AviSynth\plugins\RgTools.dll [1.0.0.0]
C:\Program Files (x86)\AviSynth\plugins\Shibatch.dll [2020-06-19]
C:\Program Files (x86)\AviSynth\plugins\TCPDeliver.dll [2.6.0.7]
C:\Program Files (x86)\AviSynth\plugins\TimeStretch.dll [2020-06-19]
C:\Program Files (x86)\AviSynth\plugins\VDubFilter.dll [2020-06-19]

[Scripts (AVSI)]
C:\Program Files (x86)\AviSynth\plugins\colors_rgb.avsi [2015-03-30]
C:\Program Files (x86)\AviSynth\plugins\EdgeCleanerv1.04.avsi [2020-09-13]
C:\Program Files (x86)\AviSynth\plugins\FFMS2.avsi [2015-05-22]
C:\Program Files (x86)\AviSynth\plugins\QTGMC.avsi [2020-09-09]
C:\Program Files (x86)\AviSynth\plugins\SMDegrain v3.1.2d.avsi [2020-09-09]
C:\Program Files (x86)\AviSynth\plugins\Zs_RF_Shared.avsi [2020-09-09]

[Uncategorized DLLs (32 Bit)]
C:\Program Files (x86)\AviSynth\plugins\libfftw3-3.dll [2016-07-30]

[Uncategorized files]
C:\Program Files (x86)\AviSynth\plugins\colors_rgb.txt [2020-05-20]
C:\Program Files (x86)\AviSynth\plugins\LGhost.auf.avs [2002-12-23]



[Plugin errors/warnings]
__________________________________________________ ______________________________

Function duplicates:

"ContraSharpeningHD" : "C:\Program Files (x86)\AviSynth\plugins\SMDegrain v3.1.2d.avsi"
"ContraSharpeningHD" : "C:\Program Files (x86)\AviSynth\plugins\Zs_RF_Shared.avsi"
"DirectShowSource" : "[InternalFunction]"
"DirectShowSource" : "[PluginFunction]"
"Dither_Luma_Rebuild" : "C:\Program Files (x86)\AviSynth\plugins\SMDegrain v3.1.2d.avsi"
"Dither_Luma_Rebuild" : "C:\Program Files (x86)\AviSynth\plugins\Zs_RF_Shared.avsi"
"Dither_YUY2toInterleaved" : "C:\Program Files (x86)\AviSynth\plugins\SMDegrain v3.1.2d.avsi"
"Dither_YUY2toInterleaved" : "C:\Program Files (x86)\AviSynth\plugins\Zs_RF_Shared.avsi"
"Dither_YUY2toPlanar16" : "C:\Program Files (x86)\AviSynth\plugins\SMDegrain v3.1.2d.avsi"
"Dither_YUY2toPlanar16" : "C:\Program Files (x86)\AviSynth\plugins\Zs_RF_Shared.avsi"
"Dither_YUY2toPlanar" : "C:\Program Files (x86)\AviSynth\plugins\SMDegrain v3.1.2d.avsi"
"Dither_YUY2toPlanar" : "C:\Program Files (x86)\AviSynth\plugins\Zs_RF_Shared.avsi"
"ImageReader" : "[InternalFunction]"
"ImageReader" : "[PluginFunction]"
"ImageSourceAnim" : "[InternalFunction]"
"ImageSourceAnim" : "[PluginFunction]"
"ImageSource" : "[InternalFunction]"
"ImageSource" : "[PluginFunction]"
"ImageWriter" : "[InternalFunction]"
"ImageWriter" : "[PluginFunction]"
"LoadVirtualdubPlugin" : "[InternalFunction]"
"LoadVirtualdubPlugin" : "[PluginFunction]"
"MinBlur" : "C:\Program Files (x86)\AviSynth\plugins\SMDegrain v3.1.2d.avsi"
"MinBlur" : "C:\Program Files (x86)\AviSynth\plugins\Zs_RF_Shared.avsi"
"sbr" : "C:\Program Files (x86)\AviSynth\plugins\SMDegrain v3.1.2d.avsi"
"sbr" : "C:\Program Files (x86)\AviSynth\plugins\Zs_RF_Shared.avsi"
"SSRC" : "[InternalFunction]"
"SSRC" : "[PluginFunction]"
"SuperEQ" : "[InternalFunction]"
"SuperEQ" : "[PluginFunction]"
"TCPServer" : "[InternalFunction]"
"TCPServer" : "[PluginFunction]"
"TCPSource" : "[InternalFunction]"
"TCPSource" : "[PluginFunction]"
"TimeStretch" : "[InternalFunction]"
"TimeStretch" : "[PluginFunction]"
"undefined" : "[InternalFunction]"
"Undefined" : "C:\Program Files (x86)\AviSynth\plugins\Zs_RF_Shared.avsi"

But yeah, like I said - LAGS problem still not fixed.