Suddenly the file was too small

[mazzo]

I've used GKnot for months and it has always delivered the right filesize.

But I encoded "Signs" the other day, and the file came out with a size of 650 Mb, instead of the normal 717-719.

The quality was very good, though.

Is there an answer to this?

[hakko504]

Maybe.

What version of GKnot do you use, what result did the compression test give and are you using the correct version of DivX for your GKnot?

[Emp3r0r]

Sounds saturated, what was your first pass file size?

[mazzo]

I Use DivX 5.02
GKnot 0.27.0.13

The compression test showed 87.9 (!)

The credits tail was many minutes long.

I don't know how you find the first pass file size.

[N_F]

Originally posted by mazzo
I don't know how you find the first pass file size.
You don't with DivX.

87,9% is too high if you want to reach an exact size.

Check
http://forum.doom9.org/showthread.php?s=&threadid=24584 for what you can do about it.

[mazzo]

Well, the file was already 608 x 320 px, so if I should have increased the resolution, I would have been forced to enlarge the picture.

[N_F]

Originally posted by mazzo
Well, the file was already 608 x 320 px, so if I should have increased the resolution, I would have been forced to enlarge the picture.

By this I assume you mean the vertical resolution went red (100%+) in the resolution tab? Personally I have no problems going a few percentage over that, say ~104%, but I know some (respected) people think otherwise.

Anyway, your best choice if you don't want to go over 100% is to unchech B-frames. That will with most certainly lower your comp. value and you'll reach your desired filesize.

[mazzo]

Anyway, your best choice if you don't want to go over 100% is to unchech B-frames. That will with most certainly lower your comp. value and you'll reach your desired filesize.

Thanks, I'll try that.

[Acaila]

I encoded that same movie about a week ago. Even with a resolution of 640x352 I got a 1st pass size of 1 GB and a compressibility test of 75% (no B-frames). So it's definately a compressible movie. Encoding at 87% like you did is overkill and more importantly, DivX 5 has problems with reaching the target filesize when going over 80%.