je viens de tester une video en SBC et je ne trouve pas que la qualité est meilleur... au contraire, elle est bien plus pixelisée (macroblocks)
mes réglages :  
VirtualDub.audio.SetSource(0);
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(0);
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(1200,10);
VirtualDub.video.SetQualityControl(0,0,0,0);
VirtualDub.video.SetMotionDetection(24,10,265,240);
VirtualDub.video.SetCrispness(25,0);
VirtualDub.video.SpaceKF(24);
VirtualDub.video.InternalSCD(95);
VirtualDub.video.SetMinKBPS(460);
VirtualDub.video.SetCurveFile("C:\\WINDOWS\\Bureau\\stats" );
VirtualDub.video.SetCurveMcFactor(0);
VirtualDub.video.SetCurveCompression(25,3);
VirtualDub.video.SetCurveFilter(270,3000);
VirtualDub.video.SetCurveCredits(0,160);
VirtualDub.video.SetLumaCorrectionAmp(1,10,30);
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(4,8);
VirtualDub.video.SetBitsReservoir(0,35,30,70,45,0);
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 );
 
ils sont peut etre mauvait, je sais pas...