Some help with aspect ratio.

[Roma81]

Hi

While using this guide: https://www.videohelp.com/forum/viewtopic.php?t=222898

I ran into some problems with my aspect ratio. The AVI I'm trying to convert has an aspect ratio of 576x320 1.80

Which I can't find anywhere in the guide. So when I get to step 4 I don't know what to put in the line about the aspect ratio (LanczosResize(....,....))

HELP!!!!!!

EDIT: oh and what about an aspect ratio of: 640x352 1.82 ???? I keep running into these wierd aspect ratio's.

[asisoft]

Your calculation is correct except that if you are making a DVD NTSC 4:3 MPEG2, it need to be 720 x 352

[Abond]

Load the avi as a source in FitCD. Select NTSC (or PAL) DVD as target and the prog will give you correct resizing values and also for AddBorders().

[thor300]

If its PAL, just resize to 720x576 and set AR to 16:9, 1.80 is as close as it gets to 16:9. Its a very big chance the original was 16:9 if the AVI is made from DVD.

[Roma81]

If its PAL, just resize to 720x576 and set AR to 16:9, 1.80 is as close as it gets to 16:9. Its a very big chance the original was 16:9 if the AVI is made from DVD.

I'm converting to PAL.
So it's: LanczosResize(720x576) ?? With an aspect ratio of 16:9, this is for 1.80 as well as for 1.82 ???

[asisoft]

If you want a more precise AR that is closer to the original, you should resize to 720 x 560 and add border of 8 pixels to the top and bottom. But the difference is minimal.

[thor300]

Some would do as Asisoft suggested, and some would resize to 704x560 and add 8 pixels on each side and top and bottom. The 8 pixels on the side will not be visible on most tvs. Regarding the add 8 to top and bottom i personally dont like too much, if i add borders i try to keep it to a multipple of 16 (macroblock size), and in your case 576 is closer to the AVI file AR than 544. Thats just a habit i have, probably doesnt make any quality difference at normal bitrates.

[Roma81]

I'm still having trouble. After using the advice you all gave me, TMPGenc gives an error when I try to start it.
I've used the 720x576 size in the AVIsynth script, but at the bottom of the screen it says 720x367 so i change it in the setting. Then when I try to start it gives an error about the window size not working in MPEG-2 or something.

I've managed to get the ones working with an AS of 640x352. (with 720x576)


Anyone still interested in helping ????

[thor300]

Maybe you set up the script wrong, The crop function should come before the resize, if not it crops after resizing, which can give unpredicable results, possible a bug in avisynth. I messed up once and it cropped twice of what i specified. If you use .Crop() in the resize [ex: bicubicresize(720,576).crop(0,50,0,-50)] it will be performed prior to resize, same as if the crop was written above resize in the script.

[Abond]

I'm still having trouble. After using the advice you all gave me, TMPGenc gives an error when I try to start it.
I've used the 720x576 size in the AVIsynth script, but at the bottom of the screen it says 720x367 so i change it in the setting. Then when I try to start it gives an error about the window size not working in MPEG-2 or something.

I've managed to get the ones working with an AS of 640x352. (with 720x576)


Anyone still interested in helping ????

If you want correct resizing parameters use FitCD. Video arrange method in TMPG should be Center or Full Screen.