Gknot with divx5 results in Blocks, Corrupt

**jdcraz** · 3 Dec 2002, 04:52 PM

I cant post a screenshot, but i can email or yahoo it if it will help.

**khp** · 3 Dec 2002, 05:53 PM

I would suspect this to be a problem with the source.

How does the clip look in the preview window in GKnot ?. And could you try loading the avs file created by gknot, into virtualdub and check how that looks like.

**jdcraz** · 4 Dec 2002, 02:55 AM

Thanks for the post khp.

DVD2AVI shows a perfect picture, as does virtualdub.

What else could be wrong? One thing: when i loaded the avs file with virtualdub, it shows the whole frame, and then about 15% of the start of the frame appended to the end. Is this normal?

**khp** · 4 Dec 2002, 09:46 AM

Originally posted by jdcraz
Thanks for the post khp.

DVD2AVI shows a perfect picture, as does virtualdub.

Originally posted by jdcraz

and then about 15% of the start of the frame appended to the end. Is this normal?

These statements appear to contradict each other. And I don't quite under stand what you mean by the start and end of the frame (top, bottom or left right ?).
Anyway I would suspect that this is caused by whatever deinterlace filter you are using. You might be able to fix this by upgrading to GKnot version 0.26.1.

As for your blocking problems, could you try loading the avs file into virtualdub, and configure a quality based divx5 encoding. (select video->compression->divx5->configure and set bitrate mode to 1-pass quality based encoding, move the slider to 100%, and save as avi). And compare the result with the GKnot encode.

**jdcraz** · 4 Dec 2002, 02:25 PM

Hi khp;

What i mean is Virtualdub shows a perfect quality picture when loading (no blocking or other sh*t) BUT there is part of the same (or maybe next) frame showing to the right (as if you were looking at an actual filmstrip with the frames in sequence).

Ok i did a quality based Divx5 encoding with vdub and saved as avi - no change - exactly same result.

BTW my Gordian Knot is updated with 0.26.1.

**jdcraz** · 4 Dec 2002, 02:30 PM

One other thing:

The encoded avi does NOT have the partial frame - aspect ratio is correct - its just corrupted. In virtualdub, if the picture was encoded like i described with part of another frame showing, it would be waaaaay to wide to be normal aspect ratio. So maybe its combining the one frame and part of the next one??

**khp** · 4 Dec 2002, 02:52 PM

Originally posted by jdcraz

What i mean is Virtualdub shows a perfect quality picture when loading (no blocking or other sh*t) BUT there is part of the same (or maybe next) frame showing to the right (as if you were looking at an actual filmstrip with the frames in sequence).

I have to admit that I dont have a clue what might cause that, could you try posting the avs file.

Originally posted by jdcraz

Ok i did a quality based Divx5 encoding with vdub and saved as avi - no change - exactly same result.

Could you try doing it again, but before you set the bitrate mode to 1-pass quality based encoding, go to the general parameters tab an press reset codec defaults.

**jdcraz** · 4 Dec 2002, 04:03 PM

Ok i tried resetting to defaults:

Ok the blocking is not as bad - only across the top. But the frames now arent advancing. Im looking at a still frame all the way though - although it is much better quality now. Before, i reset to defaults the frames seemed to be advancing.

Hmm how do i post the avs? Can i email it to you?

**jdcraz** · 4 Dec 2002, 04:05 PM

did you mean the avs log?

#
# Created with Gordian Knot
#
# http://thewef.nav.to
#
# PLUGINS
# get them from http://users.win.be/dividee
LoadPlugin("C:\PROGRA~1\Divx\GORDIA~1\mpeg2dec.dll ")
#LoadPlugin("C:\PROGRA~1\Divx\GORDIA~1\decomb.dll" )
#LoadPlugin("C:\PROGRA~1\Divx\GORDIA~1\InverseTele cine.dll")
#LoadPlugin("C:\PROGRA~1\Divx\GORDIA~1\Avisynth_Sp atial.dll")
#LoadPlugin("C:\PROGRA~1\Divx\GORDIA~1\GreedyHMA.d ll")
#LoadPlugin("C:\WINDOWS\System32\vobsub.dll")
#LoadPlugin("C:\PROGRA~1\Divx\GORDIA~1\SimpleResiz e.dll")
#
# SOURCE
mpeg2source("D:\DVD\analyse this\at_quick.d2v")
#
# TRIM
#trim(startframe,endframe)
#
# IVTC
#Telecide()
#Decimate(cycle=5)
# or use
#InverseTelecine(40,10,15)
#GreedyHMA(1,0,4,0,0,0,0,0)
#
# DEINTERLACING
#FieldDeinterlace()
# or use
#VerticalReduceBy2
# or maybe
#GreedyHMA(1,0,0,0,0,0,0,0)
#
# CROPPING
crop(0,0,717,478)
#
# SUBTITLES
#VobSub("FileName")
#
# RESIZING
BicubicResize(640,352,0,0.5)
#
# DENOISING: choose one combination (or none)
# 1) little noise (fast)
#TemporalSmoother(2,1)
#
# 2) medium noise (slow)
#SpatialSoftenMMX(1,4,6,false,false,4,4,6,8)
#TemporalSmoother(2)
#
# 3) heavy noise (very slow, you have been warned)
#SpatialSoftenMMX(2,4,6,false,false,4,4,6,8)
#TemporalSmoother(3)
#SpatialSoftenMMX(1,4,6,false,false,4,4,6,8)
#
# BORDERS
#AddBorders(left,top,right,bottom)
#
# COMPRESSIBILITY CHECK
# !!!!Snip Size now has to be 14 for use in GKnot!
#SelectRangeEvery(280,14)
#
# FOOL CCEnc
#ResampleAudio(44100)

**khp** · 4 Dec 2002, 05:33 PM

Originally posted by jdcraz
Ok the blocking is not as bad - only across the top. But the frames now arent advancing. Im looking at a still frame all the way though - although it is much better quality now. Before, i reset to defaults the frames seemed to be advancing.

This also happens when you, load the encoded avi file into virtualdub ? or when using the divx player that comes with the codec ?

Originally posted by jdcraz

did you mean the avs log?

yup, that is the file. But it's not a log, it's a script that defines how the source video stream should be processed before being passed to the divx codec.

The file indicates that you have told GKnot to process an NTSC source at 23.976 fps without preforming IVTC. Which means that you should have selected ForceFilm in DVD2AVI.
Did you select ForceFilm in DVD2AVI ?, and does the vob file come from an NTSC DVD ?

**jdcraz** · 4 Dec 2002, 05:50 PM

Yes the encoded file always is the same corrupted, in Divx player, media player, AND virtualdub.

Ok....yes i have selected force film. I also tried with 'none'. With field operation set to 'none' DVD2AVI tells during preview that the movie is 16:9 29.97FPS FILM Progressive. Colorspace is set to YUV. YUV > rgb is set to 'PC scale'.

I have tried this with two different dvd's "enemy at the gates" and "analyze this". It was the same with both. I completely encoded enemy at the gates without checking, so it was ruined all the way (13 hrs

)

what am i doing wrong?

**khp** · 4 Dec 2002, 05:56 PM

I can find nothing wrong, with anything you have done.

I'am beginning to think that something must be seriously wrong with your system.

You might try using Divx3.11 instead. Other than that I don't think I can be of much more help.

Sorry

/khp

**jdcraz** · 4 Dec 2002, 06:06 PM

Does the video card have anything to do with the encoding? I do have corrupt pixels on my desktop sometimes - i have overclocked my video card in the past

**khp** · 4 Dec 2002, 07:25 PM

Originally posted by jdcraz
Does the video card have anything to do with the encoding?

No the video data does not pass through the video card durring encoding.

Originally posted by jdcraz

I do have corrupt pixels on my desktop sometimes

This might just as well be caused by the cpu.
Overclocked AMD processors have been know to produce errors like this durring jpg decompression.
I have seen this happen myself, with 750mhz duron overclocked to 1ghz. Which also produced some rather strange effects durring divx encoding.

Gknot with divx5 results in Blocks, Corrupt

Gknot with divx5 results in Blocks, Corrupt

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