Nandub settings

[vaxis]

I'm not a real newbie, but have a little to small experience with nandub. My question is this:

I have done say 5 dvd-rips with nandub and GordianKnot. The results are always bad and not comparable at all with, for example vite's releases. The settings I use in SBC Settings is the default GordianKnot uses.

My latest dvd-rip is far the worst result. It is dvd from a swedish theatregroup called "Varan-TV". When I loaded the first pass in GordianKnot I had to go for the resolution 352x272 to get within the range 65-75% for Video Size/First Pass Size. When the movie later is played in fullscreen mode, the picture is very blocky.
The data for that dvd-rip is as follows:
Source: PAL 4:3, 25fps
1CD
Length: 1h 32min
Audio: vbr mp3, ~78mb
Video bitrate: 896kbps
Resolution: 352x272
Bits/(Pixel*Frame): 0.3
SBC Settings:
VirtualDub.audio.SetSource(1);
VirtualDub.audio.SetMode(0);
VirtualDub.audio.SetInterleave(1,500,1,0,0);
VirtualDub.audio.SetClipMode(1,1);
VirtualDub.audio.SetConversion(0,0,0,0,0);
VirtualDub.audio.SetVolume();
VirtualDub.audio.SetCompression();
VirtualDub.audio2.SetSource(1);
VirtualDub.audio2.SetMode(0);
VirtualDub.audio2.SetInterleave(1,500,1,0,0);
VirtualDub.audio2.SetClipMode(1,1);
VirtualDub.audio2.SetConversion(0,0,0,0,0);
VirtualDub.audio2.SetVolume();
VirtualDub.audio2.SetCompression();
VirtualDub.video.SetDepth(24,24);
VirtualDub.video.SetMode(3);
VirtualDub.video.SetFrameRate(0,1);
VirtualDub.video.SetIVTC(0,0,-1,0);
VirtualDub.video.SetRange(0,0);
VirtualDub.video.SetDivX(896,9999);
VirtualDub.video.SetQualityControl(0,0,0,0);
VirtualDub.video.SetMotionDetection(15,15,300,300) ;
VirtualDub.video.SetCrispness(100,0);
VirtualDub.video.SpaceKF(100);
VirtualDub.video.InternalSCD(100);
VirtualDub.video.SetMinKBPS(270);
VirtualDub.video.SetCurveFile("");
VirtualDub.video.SetCurveMcFactor(0);
VirtualDub.video.SetCurveCompression(0,0);
VirtualDub.video.SetCurveFilter(0,6000);
VirtualDub.video.SetCurveCredits(0,270);
VirtualDub.video.SetLumaCorrectionAmp(0,10,30);
VirtualDub.video.SetCurveRedist(0);
// VirtualDub.video.CalcCurveCompression();
VirtualDub.video.SetCompLevelsMain(2,8);
VirtualDub.video.SetCompLevelsA(300,3,16);
VirtualDub.video.SetCompLevelsB(300,4,16);
VirtualDub.video.SetCompLevelsC(300,5,16);
VirtualDub.video.SetCompLevelsD(300,6,16);
VirtualDub.video.SetCompLevelsE(300,7,16);
VirtualDub.video.SetCompLevelK(2,4);
VirtualDub.video.SetBitsReservoir(0,35,30,70,10,0) ;
VirtualDub.video.SetLowBrCorrection(0,0);
VirtualDub.video.NoAVIOutput(0);
VirtualDub.video.GenStats("",0);
VirtualDub.video.SetEncodingControl("");
VirtualDub.video.filters.Clear();
VirtualDub.subset.Delete();
VirtualDub.brc.Set( 0, 645 );
VirtualDub.brc.Set( 1, 1 );
VirtualDub.brc.Set( 2, 128 );
VirtualDub.brc.Set( 3, 0 );
VirtualDub.brc.Set( 4, 1 );

I always load the first pass file into GordianKnot and edit it, save it, and create an ecf-file.

Is there anyone who have any suggestion to get equivalent result as vite gets?

[khp]

Checkout this thread (http://forum.digital-digest.com/showthread.php?s=&threadid=5787), for a few tips, on how to increase compressability.

[benderman]

More information, please. Did you cropp the black borders around the picture? Has the video a lot of background noise (in the picture) or has it a lot of motion (flashing lights, zooms, rotation, many scene changes)? I think 896kbps for that small res is more than enough. Maybe you should apply a noise-reduction-filter or a filter to blur the video to make it more compressible.

[vaxis]

Yes, I have cropped away the black borders.
the avarage motion is 46,9 and avarage luma noise is 13,5.
I am doing a new first pass with little noise in noise filter. Yes there is a lot of action in the movie. The Bits/(Pixel * Frame) is really high, ~0.4 (not 0.3 as I told earlier). That's because I want to get within the range 65-75% in Video Size/First Pass Size.

Is the high Bits/(Pixel * Frame) value an indication of a movie with a lot of motion?

I'll post the result for the new encoding later when it is finished.

[benderman]

0.3 to 0.4 bitperpixel is normal for the first pass and dosn't indicate higher motion than normal. For second pass 0.2 to 0.25 should be enough.

Is the movie interlaced / did you use a deinterlacer?

[vaxis]

You tell that 0.2 to 0.25 is enough. Should I don't change the resolution for the second pass to get within the range 65-75% and instead have 0.2 in bitsperpixel?

The source isn't interlaced.

By the way, I have finished the encoding with little noise filter, and it got worse than not having it applied. Later I'll maby post a short bit of the movie compressed so you can see the result.

[vaxis]

Does a change in the SBC settings in Nandub affect the first pass file so that I have to do another first pass?

[benderman]

I did that many times with nandub and DivX3.11a and it worked perfect. I don't know if there is any difference if you use GK and other DivX-versions.