Aspect Ratio problem

J

Jola

New member
Hi
I have an avi with an aspect ratio of 640 x 288.
After converting using DVD2SVCD and using the settings I normally use as per CM's tute (Anmorphic no borders) the result is and mpeg (and then a dvd) with the characters stretched.
I've started using the D2SRoBa lately but that shouldn't cause it, should it?

Thx
Jola
 
ChickenMan

ChickenMan

1
I was waiting for someone to raise this, it appears the latest version of DVD2SVCD has gone back to its old ways and doesnt do a good job of 16:9 Anamorphic conversions for avi's.

A work around is to tick the Edit as Part of Video Encoding option in the Frameserver tab, and when the new window pops up, manually change the resize line and AddBorders line. The formular to work it out are at the bottom of the AVI to SVCD Tutorial but with a width of 720 (for DVD) rather than the 480 (for SVCD).

Is your 640 x 288 avi PAL or NTSC ? Let me know and I can tell you the correct figures to enter.
 
J

Jola

New member
Hi Chickenman.
The 640 x 288 is PAL
During the meantime I tried some others ie 592 x 256 NTSC and 640 x 272 NTSC and obviously these were the same.

Thx
Jola
 
ChickenMan

ChickenMan

1
Okay so select 16:9 Anamorphic and edit the aviscript to include these numbers:

For 640 x288 PAL, set to

xxxxxResize(720, 484)
AddBorders(0,46,0,46)

For 592 x 265 NTSC

xxxxxResize(720, 392)
AddBorders(0,44,0,44)

For 640 x 272 NTSC

xxxxxResize(720, 388)
AddBorders(0,46,0,46)

Hope that helps.
 
J

Jola

New member
Thx Chickenman for the information.
Sorry to be a pain but I'm not sure how to do what you're saying. In the Conversion tab I've selected the "anamorphic (no borders, encoded as 16:9)" and then I've gone to Frameserver tab (as attachment). It only allows me to resize to the defaults and not manually enter the calcs. Also where do I type in the borders?

Thx Jola
 

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ChickenMan

ChickenMan

1
You dont change anything there, you ONLY tick the "Edit as part of Video encoding" which you have done. When you start DVD2SVCD and it finishes the audeo extraction/encoding, just before CCE starts, a new Script Editting window will pop up, you change the figures in there (adding the AddBorders line if its not there), hit Save, then hit Go. You cant do this in Batch mode, unless you know the right time to wake up :D
 
J

Jola

New member
That didn't work - same thing
Tried an avi that worked earlier and that's the same - tall thin people what's happened?
Thx
Jola
 
ChickenMan

ChickenMan

1
If you selected Anamorphic (no borders, encoded as 16:9) and edited the aviscript to use the figures I listed above, I cannot for any reason see why it did not come out at correct AR. I have done this MANY times and has NEVER faulted me.
 
J

Jola

New member
Ok, I'm going to give it another go. Think I'll clean it up and re-d/l DVD2SVCD in case I've changed some setting I'm not noticing.
Thx
Jola
 
J

Jola

New member
Thx - it worked after a re-install must have changed something.
If I could pick your brains, I've read the formula and the borders bit is simple enough but my calcs don't give an aspect of 720 x 484, can you see what I'm doing wrong:
PAL avi 640 x 288
therefore as per formula
[(720/640)288]
54/59
=
324
0.91525
= 354

Similarly my calc for the NTSC 592 x 265 comes out at 720 x 292. In the formula in the tute, if I use the example figures, I get the same answer as you.
What am I missing here? (apart from a brain) :confused:

Also do you adjust the final figure to be divisible by 4 to produce a whole number?

Sorry - just want to get it right.

Thx Jola
 
ChickenMan

ChickenMan

1
Your doing the calcs correctly but thats for a 4:3 encode. As I said, for Anamorphic 16:9 you add an extra 128 for PAL and 108 for NTSC, with naturally a smaller boarder figure. Yes, you always adjust the final size (height) to be divisable by 4 (or 8 or 16), a couple of extra pixels will never be seen.

Adding the 128 and 108 are figures I have found from experience, I'm not sure on the valid mathmatics of it.

I have just been given a small AVI Resolution calculator. I cannot find any reference to it via Goodle nor do I know the author, but the numbers it puts out seam to be the same/similar to mine.
 

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