Avisynth & frames sizes

[Delta2]

Hi,

Don't know if this is the right place

I'm using free tools to convert AVI to DVD, my encoder is QuENC, and I made a APP by my own that accomplish all tasks and the final result is a ISO ready to burn.

All works fine, but I have a problem with Frame Size, DVD Lab gives me an error of "Wrong Frame Size" when I try to open my encoded DVD. I don't know how to calculate this, i.e.,

imagine I have a AVI source of 640x240 and I want to convert it to a PAL DVD with an aspect ratio of 16:9, I use this avisynth script :

AviSource("c:\mymovie.avi")
Lanczos4Resize(720, 576)
AddBorders(0, 50, 0, 50)
AssumeFPS(25)
ConvertToyv12()

and run QuEnc with this parameters :

Quenc -i script.avs -o multiplex.mpg -b 4000 -maxbitrate 9000 -2 -aspectratio 16:9 -auto -close

what values must I use for frame width and heigh for Lanczos resize ?

is there a rule for calculating this ???

[mats.hogberg]

IIRC, the output video will be 720x676 from this script. Change the resize to Lanczos4Resize(720, 476), then add the borders (50+50=100) resulting in a 720x576 video (which is PAL full D1 res).
Haven't looked into the AR aspect of this example.

/Mats

[Delta2]

But how do you know that the output will be 720x676

what calculations did you made ? this is what I don't understand

I want a widescreen output (16:9)

thank you

[mats.hogberg]

You first resize to 576 height with
Lanczos4Resize(720, 576)
Then you add 50 pixels of borders top and bottom with
AddBorders(0, 50, 0, 50)
giving a total height of 576+ 50+50=676
Play the AVS in MPC (or other video player that handles AVS scripts) to see if it looks ok before you proceed to encode it.

/Mats

[jagabo]

Assuming your AVI source has a pixel aspect ratio of 1:1, and that you want to retain the final picture aspect ratio, you should:

4:3 DVD
Lanczos4Resize(704, 288)
AddBorders(8, 144, 8, 144)

16:9 (anamorphic) DVD
Lanczos4Resize(704, 384)
AddBorders(8, 96, 8, 96)

Try using FitCD to calculate the sizes.

[guns1inger]

or Paranoia, which is a little simpler than fitcd

[Delta2]

thanks a lot guys, BUG FIXED

Image perfect on my TV, either with 16:9 or 4:3 sources

Here is my APP GUI if you want to try, BUT BE AWARE OF THIS :

- you need Win XP Framework
- it is PAL DVD-VIDEO optimized
- you need full codecs
- I don't GIVE CCE, you must buy it and install on my APP CCE folder, I just use free tools

I had given it only to friends, I made it mainly to myself, and all said to me it works fine. It is a GUI for CCE encoding, QuENC, and the output is a DVD-MOVIE ISO image, and it burns a DVD either using NERO at backgroud or not

http://pwp.netcabo.pt/falmartins/videohelp/avi2iso.msi