Avisynth: Cartoons, shorten the GOP to 12 frames (PAL) or 15 (NTSC) ?
 

I know this was brought up in antoher thread, but I am still confused by:



Can I still encode at 29.97 fps (NTSC), or should I change that to 15 fps?

A few other somewhat related questions:

I know the templates are set for 24 fps, but I always encode at 29.97 fps (mostly because phrases like "inverse telecine" and "3:2 pulldown" confuse the heck out of me!)

If I'm encoding at 30 fps should I also set my "sampler" length to 30 or can I leave it at 24?

Am I missing out on something by encoding at 30 fps rather than 24?

Thanks,
Icarus

When you run dvd2avi, if it shows FILM 95% or more, encode the video at 23.97 by setting dvd2avi to do FORCE FILM. This will help you save space since there is less information per second being encoded. If it is below 95%, and you use force film(encode at 23.97), you may run into audio sync issues.

I don't usually use DVD2AVI as most of the encoding I do is from VHS captures, or Satellite TV captures.

What frame rate should I use for animation/cartoons:

15 fps
24 fps
30 fps

??

Thanks,
Icarus

The KVCD/KDVD templates are perfect for movie but for cartoons/anime you only need to do the following, use Inverse Telecide built into TMPEG; and set it so that the GOP reads from top to bottom 1-12-2-1-18. That is the setting I use.

odd little thing!!
 

I had some animation material that gave me the runaround the other day.. I used dvd2avi on it and tested it and it said that it was FILM. I let it play for a bit to make sure most of this anime was FILM and to my surprise it jumped between FILM and NTSC sometimes. It gave TMGENC a hard time becuase after doing some test samples.. I found that i had to throw some deinterlacing into the mix, but dvd2avi didnt tell me that it was interlaced, but their was clearly elements of combing goin on.
Anyways.. to stop boring ya'll :) I had no audio/video sync probs.. But TMPGENC couldnt finish encoding this anime because i kept getting Illegal floating point errors all the time.. Would the FILM/NTSC jumping around cause these errors?

tks

Too Tall:

I "partially" followed your advice, which may be why my results weren't perfect.

Since it is NTSC, I set the GOP to:

1-5283-2-1-15

(as per the "optimal scripts" thread)

But I didn't do "inverse telecide", and encoded at 29.97 fps.

The results were OK, but there were quite a few "ghost" images on rapid movement (it's just a children's cartoon for my daughter, but I'd still like to get it right!).

Questions:

If I check "inverse telecide" in TMPGenc, should I encode at:

23.97 fps
24 fps
29.97 fps?

I captured the cartoon in DV AVI by passing a satelite signal through my SONY mini-DV camera, so the .avi is 720x480 @ 29.97 fps.

This has worked out great for other TV and VHS captures, but this cartoon is giving me a hard time!

Many thanks,
Icarus

HI Icarus3000,

Add the following lines to your script after your source line to perform inverse telecine:

Encode at 23.976fps.
Make sure you load the "decomb.dll" in your script.

-kwag

Thanks Kwag! I will try that when I get home tonight.

One more question:

If I add telecide/decimate to my avisynth script, do I ALSO need to select "Inverse Telecine" in TMPGenc, or is including it in the scrpt sufficient?

Thanks,
Icarus

You want to encode at 23.976 fps (29.97 internal) with 3:2 pulldown if you use Telecide and Decimate.

Decimate changes it from 29.97 to 23.976
Telecide attempts to remove the lines from an interlaced file.

Hope this helps.


by the way...
kwag you rock man!!!

Thanks TT :)

Excuse my ignorance, but I think I almost have it!

In TMPGenc, I need to select:

"3:2 Pulldown"

and encode at 23.97;

and include

telecide()
decimate()

in my Avisynth script?

What if I do all that WITHOUT selecting "3:2 Pulldown"?

Thanks,
Icarus

EDIT - Now I am more confused than ever! I don't see a "23.976 (29.976 internal)" option in TMPGenc! Please help!

The XX fps (XX fps internal) are listed above the XX fps.

You can also load the default KDVD template and just make changes to the GOP.

Too Tall:

I see many XX fps (XX Internal) options (the closest I see is 14.985 fps (29.97 internal)), but no specific 23.97 (29.97) option. What version of TMPGenc are you using? I'm using 5.1049.157.

Thanks,
Icarus

I'm using 2.54.36.134

I hope this helps you. This is probably the best setting to use for anime

First the unofficial KDVD (NTSC) anime template.
And second the unofficial filter selection (or what I use anyway)
Make a copy of any template then and name it what ever you want. Then open it in notepad and copy the template in the first box above and then just save it.

Thanks for your help.

I think some of the confusion comes from the fact that I am trying to make an MPEG-1 KVCD, not a KDVD.

In any case, after much trial and error, I decided to use:

telecide()
decimate()

Encode at 23.97
WITHOUT 3:2 Pulldown

Results came out great!

Will try to work on modifying the KDVD ANIME template for KVCD.

Thanks again,
Icarus

Cartoon How To?
 

A while back I captured a cartoon movie at 352x288 and then just burned the resulting MPEG onto a VCD using VCDEasy with reasonable results. The image is about as good as the VHS source that I got it off (A little blurry but no artifacting effects). Since then I have been scouring the forums here looking for anyone that has written a "how to capture and burn Cartoon PAL VCD's". Is there anyone out there that can steer me in the right direction please?

Also, what can I do with the above MPEG file that I have got to clean it up and reburn it to a VCD?

Thanks.

Hi Rassilon,

Just use the "current script" posted, and lower the GOP to 12 frames. That should give you excelent quality and good compression.

-kwag

Why are we supposed to use a GOP of 12 frames for cartoons? What would happen if we just use the current optimal script with a GOP of 25(for PAL)?

Just trying to learn more :D I've allready learnt a lot by reading all the threads on this great site (maybe the best on the entire net regarding videoconversion) with all you great and friendly people :D

Anerboda

Not for cartoons :!: The cartoons and anime have very sharp edges, and artifacts are more visible with longer GOPs. That's why they look better with shorter GOPs, at the expense of some compression loss.

-kwag