Disabling resizing

[Atax]

Hi all,

I would like to make absolutely shure that the movies I make are in no way resized thus left in their original resolution. I couldn't figure this out in GKnot, can someone tell me how this is done?

Thanks in advance!

[jggimi]

NTSC dvds have a resolution of 720x480, and PAL dvds have a resolution of 720x576. Each dvd will then vary from this, based on 1) the amount of letter boxing on the top and sides, and 2) the display aspect ratio, which will be either 4:3 or 16:9.

If you want to eliminate resizing entirely, you will need to use an .avi player capable of adjusting the aspect ratio to either 4:3 or 16:9, such as BSPlayer.

To eliminate resizing, merely press the "Edit" button on the Save & Encode window, to edit the .avs script created by Gknot. Either delete the resizing command, or turn it into a Comment by placing a "#" in front of it.

WARNING: Be very careful of your crop values! Since you will not be resizing to a modulo 16 or modulo 32 size, if you don't eliminate cropping, you will have to manually ensure your crop values leave a final size that can be correctly encoded. Modulo 16/32, the defaults for GKnot resizing, are safe for most video cards. I wouldn't go below modulo 8, as I believe that is the size of DivX macroblocks.

[manono]

Hi-

I would like to emphasize what jggimi implies-this is not a good idea. You will wind up with incorrect AR as well as probably incorrect mod resolution if you're not careful. If it's only mod 2, then DivX5 won't even accept it and many vid cards will choke on it.

[JohnMK]

Not to mention that by not resizing he's going to be suffering really ugly compression artifacts unless he always does 3 CD rips.

The correct resolution to resize to is in my opinion, whatever resolution gets you to 60-70% quality after the 5% compressibility check. If you choose a resolution that's really high and the comp check produces a 40% figure for that res, it'll look extremely ugly. If you go higher than 70%, you risk having an undersized file.

[jggimi]

I have done this with short works, usually featurettes and trailers, where I'm not going to go to 3 CDs. I'll do a single-pass encode with Quant 2 (100% Quality), and use Gknot only to create the .avs script. The limitations I described above still apply.

[Atax]

Thank you all for you help!

@manono
I always seen DivX3, 4, 5 as a supstitute for DVD's. Size is not an issue with my Divx-movies (they usually end up at about 1.8 Gigs including AC3-Track), which is also the reason for me to refrain from resizing as this would only take me farther away from the good quality a DVD usually has.

[JohnMK]

Not necessarily. If your compressibility test shows you at less than 60% when you preserve original resolution, resizing will still benefit you.