Aspect Ratio AGAIN!

[Snollygoster]

Hello people,
I was reading through Doom's 9 guides for converting DivX to DVD (NOT SVCD).

Well, unfortunately there is no specific guide, you have to combine 2 or 3 guides to get things done.

So when I load my avisynth file in CCE the image includes black bard and the AR if I play the avs files is correct.

QUESTION? What A/R should I choose in CCE? 16/9 or 4/3 ? My movie is 16/9 but I have added the borders!

This is my script:

avisource("VIDEO.avi")
BicubicResize(720,272)
AddBorders(0,104,0,104)
AddAudio()

Original AR is: 1:2.35

Please reply ASAP!

[auenf]

if you create a 16:9 clip inside 4:3 borders, you have created a letterboxed file, which will playback normally at 640x480 res (4:3)

Enf...

[stationx]

Snollygoster,
I don’t claim to be an expert but here is what I have found from playing. I have tried to document everything, as a helping hand for anyone doing a DivX to DVD-R conversion. If you have a wide screen TV and want to watch the movie as large as possible with minimum black boarders and correct aspect then here is what I have found. Most DivX are from an NTSC 1:2.35 source, use Gspot to check the source and you will normally find 256x608. I set CCE to use aspect ratio 1:1 as there is no DAR flag in DivX. If you just want to increase the correct size for NTSC DVD (480x720) you would increase the horizontal and vertical by 1.125 (720/640=1.125). So your new aspect ratio would be 306x720. This still isn’t the correct for NTSC DVD as we need to increase vertical size of 306 to 480. We do this by adding black bars. So 480-306=174 of blackness. This needs to be spilt between the top and bottom (172/2=87) giving 87 bar + 306 picture + 87 bar=480

Movie.avs file would be:-
avisource("movie.avi")
BicubicResize(720,306)
AddBorders(0,87,0,87)
ResampleAudio(44100)

The above is fine in 4:3 and 14:9 on my Sony TV, but in widescreen the picture is squashed (a lot of people don’t notice). The reason is it’s looking for an anamorphic source. So we need to stretch the vertical part of the picture. Gspot shows the source as 608 x 256 (1:2.375 ). We are displaying at 16:9 a ratio of 1:1.77. The difference between 1.77 and 2.375 is 2.375/1.77=1.33. We need to increase the vertical by this value, 306x1.33=406ish. So 480-406=74 of black. Divided by 2 gives us a top bar of 37 a picture of 406 and a bottom bar of 37. Your anamophic Movie.avs file will be:-

avisource("test.avi")
BicubicResize(720,406)
AddBorders(0,37,0,37)
ResampleAudio(44100)

If you edit a small section of movie.avi in virtualdub and encode it on to a DVD-RW and try it in you DVD player you’ll see how it looks. Try the two different avs script and see the difference.