Help with ratio conversion

[DVDragon]

How exactly would you convert a 16:9 movie to 4:3? I've been searching the forums all night and have tried using avisynth but I just can't get it. I have Adobe Premiere 6.0 and Media Studio Pro if either of those are options. I would really appreciate any help.

[mikeathome]

Hi,

FitCD will make it very easy for you...

http://shh.dvdboard.de/

- DVD2AVI your input
- input the .d2v file in FitCD
- set the right input resolution
- set your output accordingly BUT disable anamorphic in the output (will lead to 16:9 -> 4:3 conversion)
- import the saved .avs in CCESP 2.64.01.10 (or 2.66, or 2.50) directly
- go do a 3passVBR

mike

[DVDragon]

I imported my d2v file like you said but what do i do about the other settings? not sure what numbers to put in for converting 16:9 to 4:3.

[mikeathome]

Originally posted by DVDragon
I appreciate the reply but i'm still not sure about the settings. Here is what i've got so far http://webpages.charter.net/gabeg/fitcd.jpg . I imported my d2v file like you said but what do i do about the other settings? not sure what numbers to put in for converting 16:9 to 4:3.

Hi,
from your first post I understood your title is 16:9 anamorphic ?
- if YES, set the input parameter accordingly (check anamorphic @ input resolution)
- you may also want to crop any black borders to align to maximum picture output width, to do so:
* open your .d2v in TMPEG (or via a .avs in VirtualDUB (better))
* find out the real coded pixel by maintain crop parameter
* note down the horizontal and vertical black border pixel
* in FitCD, in the line below the input resolution, change the resolution so that the left and top border matches (remember the picture will centered !)
- ensure the rest of the resize settings stay as they are NOW, the look ok ! (this gives you Input 16:9 anamorphic to 4:3 conversion)
- you may want to choose 'Presize Bicubic' resize method
- last but not least, ensure that you video is FILM (Force Film in DVD2AVI) otherwise choose Interlaced resizing !

Save the script and open it in VirtualDub. It should give you 4:3 letterboxed output in correct Aspect Ratio (check that the circles are round).

This is also the correct way to resize for SVCD (xSVCD) as these formats can give you trouble at 16:9.

mike

[jdobbs]

DVDragon,

Here is an example AVISYNTH script (for NTSC) the would convert a 16:9 anamorphic source into a 4:3 :

LoadPlugin("C:\PROGRAM FILES\DVD-RIP\AVISYNTH\MPEG2DEC.DLL")
mpeg2source("d:\location\infile.d2v")
BicubicResize(720,360)
addborders(0,60,0,60)
ResampleAudio(44100)

The math:

16:9 = 1.77778:1
4:3 = 1.33333:1
Conversion = (1.33333 / 1.77778) = .75
480 * .75 = 360

You then add the black borders to the top and bottom to make the picture DVD compliant (480 in the vertical direction). This script is often used to convert a 16:9 anamorphic DVD to 4:3 for SVCD use. Please note that you need to consider the TRUE aspect ratio of the source. Some "widescreen" pictures are not anamorphic. They are just 4:3 pictures with the borders already added. The "ResampleAudio()" command is just there to fix a bug when working with some versions of CCE, AVISynth, and Athlon processors...

jdobbs

[DVDragon]

Thanks for the reply but i figured it out.