VOB to Avi using XviD4PSP

[psynemushroom]

Evening, guys. I'm trying to convert a VOB file to Avi using XviD4PSP and I wish to maintain (almost) the same image quality as the input file, just to watch it in the PC/TV with good quality but not with a file so big as the VOB. But I don't know which is the best Avi format and video encoding to do so.
I also have a problem regarding the Resolution/Aspect of the conversion. My VOB file is 720x480 (16:9) but when I try to convert it to Avi, it changes to 720x408... And when I try to change the resolution to its original size manually, the output aspect change automatically (from 1.7778 16:9 to 1.5000). Also, if I change the output aspect to the same as input, the output resolution size changes back to 720x408. That's really annoying, I'd like to know if it's possible to avoid it.
Thank you in advance.


Here are the media info of the input file:
General
Complete name : X.vob
Format : MPEG-PS
File size : 261 MiB
Duration : 4mn 11s
Overall bit rate mode : Variable
Overall bit rate : 8 693 Kbps


Video
ID : 224 (0xE0)
Format : MPEG Video
Format version : Version 2
Format profile : Main@Main
Format settings, BVOP : No
Format settings, Matrix : Custom
Format settings, GOP : Variable
Duration : 4mn 11s
Bit rate mode : Variable
Bit rate : 6 984 Kbps
Maximum bit rate : 9 800 Kbps
Width : 720 pixels
Height : 480 pixels
Display aspect ratio : 16:9
Frame rate : 29.970 fps
Standard : NTSC
Color space : YUV
Chroma subsampling : 4:2:0
Bit depth : 8 bits
Scan type : Interlaced
Scan order : Top Field First
Compression mode : Lossy
Bits/(Pixel*Frame) : 0.674
Time code of first frame : 00:04:06:12
Time code source : Group of pictures header
Stream size : 210 MiB (80%)


Audio
ID : 189 (0xBD)-160 (0xA0)
Format : PCM
Format settings, Endianness : Big
Format settings, Sign : Signed
Muxing mode : DVD-Video
Duration : 4mn 11s
Bit rate mode : Constant
Bit rate : 1 536 Kbps
Channel count : 2 channels
Sampling rate : 48.0 KHz
Bit depth : 16 bits
Delay relative to video : -220ms
Stream size : 46.1 MiB (18%)

[manono]

I'd like to know if it's possible to avoid it.

Avoid what? Avoid getting an AVI in the correct aspect ratio?

What's wrong with 720x408? Do you want larger, like 848x480? You can adjust the resolution to be larger. Do you want 720x480 but have it play in the correct aspect ratio? You can set a SAR for it.

Or open the VOB in AutoGK and let it make the hard decisions.

[psynemushroom]

Avoid changing the aspect ratio if I keep the original resolution size (720x480). Can you explain what a SAR is and how I can set it?

[aedipuss]

dvd mpeg has non-square pixels. to convert to square pixel format avi you need to change the size. either 854x480 or 720x408 is fine and keeps everything looking right.

[manono]

Avoid changing the aspect ratio if I keep the original resolution size (720x480). Can you explain what a SAR is and how I can set it?

Under Video->Resolution/Aspect of XviD4PSP, set 'Aspect Adjusting Method' to SAR and 'Output Aspect' to 1.7778 (16:9)' The SAR tells the player how the video is to be resized at playback time, just as the DAR of a DVD tells how it's to be resized (either 16:9 or 4:3). Not all players will respect that SAR, though, and resize it properly.

Me, I usually resize it as aedipuss suggests since I use XviD4PSP to make MP4s for upload to YouTube.

[psynemushroom]

Thank you guys for helping me out with this. I just got how I should convert my videos with settings that attend my requirements. Thanks.