XviD (or GKnot?) ignores manually set filesize!

[weyoun07]

Hello forum members!

I've come across a very strange problem when encoding with Gordian Knot together with XviD:

I have ripped a DVD-movie (obviously pre-shrunk to 4,5 gig, mdf/mds alcohol-image, mounted with DTools) using robot4rip, which created three .m2v files (1.048.575 kb, 1.048.576 kb and 976.995 kb) as well as two .ac3 files (german and english, each 319.232 kb) out of the image.
r4r was set to create two mp3s (vbr, 128 kbit, 92 mb each) from the ac3 tracks for further usage.

Now when I did all the needed settings in Gordian Knot and the XviD-encoder (like cropping, joining audio, first & second pass settings, etc.) I entered manually a final size of 1250 mb (1.280.000 kb). In the "interleaving and avi overhead" section I marked "calculate frame overhead" and for audio 1 & 2 "vbr mp3". In the "Audio A & B" section I chose the two mp3-files (see above). In the final settings before encoding I set "just mux" for the mp3-files.
Based on my desired settings GKnot has calculated a video-filesize (audio not yet included) of 1056 mb and a Bits/(Pixel*Frame) value of about 0.30 which should be of a quite high xvid quality.

Everything went fine when encoding the movie ... only the final filesize (including audio) never got beyond about 1050 mb (-> I've tried it with many different settings yet)! No matter what alternative settings I chose, the final movie always got undersized! Even when I set the final size to 1050 mb and without any audio (as I intended to join the audio tracks manually with virtual dub mod later on) the final .avi ended up at about 850 mb - obviously there's absolutely no possibility for me to get a final filesize (video and audio together) of 1250 mb :confused:

Now I'm completely desperate :(

Can anyone tell me what's the mistake or give me a solution to that very strange problem please?

Many thanks in advance! ;)

Cheers,
weyoun07

[CWR03]

To begin with, there's no reason to preshrink and mount a DVD - you will have a better end file if you rip the original files directly from it. As far as sizing is concerned, it's not uncommon if you happened to install XviD over a previous installation. If you don't already have the newest XviD, download it, install, uninstall and reinstall it. If you already have the newest version, just uninstall/reinstall it.

[jsquare]

In the "interleaving and avi overhead" section I marked "calculate frame overhead"
Don't use this option for Xvid, it's only there for Divx encodes.
Also make sure that you're using the appropiate frame rate when you ripped the .d2v file.

[Shinigami-Sama]

well you probly hit the saturation point of the source, as in Xvid couldn't make it look any better even if it used more bits, you could always cap the quants, like minium of like 20 or something, but whats the point? you've reached max quality with your given source, fitlers and encoder, be happy :)