PAL to NTSC (25fps to 29.97fps) help needed

[Tatjahna]

Hi all!

I have noticed a bunch of way to convert from FILM to NTSC, NTSC to FILM, PAL to FILM and vice versa, but nothing (as I have seen) about PAL to NTSC directly.

Since DVD players needs the 29.97 framerate in NTSC, I wonder what is the best way to do it.

I have some AVI and MPG that I need to convert and resize to be in the compliant DVD format to do NTSC DVDs.

For the avis, I have separate the audio in a wav file. I have opened CoolEdit, but I don't have a clue on which value to put in the stretch. And does VDub is good to adjust the framerate to 29.97 ?

I just want to be sure to have the good "reciepe" since I have upcoming DVDs from France to convert this way too!!

Thanx in advance guys!

[Uli]

First:
Why do you want to convert? DVD players all over the world play NTSC and PAL without probs...

If you want anyway, then the following works for progressive material:
To convert, you first have to slow down the PAL source-WAV by 23.976/25.0 = 0,95904 x speed or lengthen it by 25.0/23.976 = 1,0427093760427093760427093760427 x time. Whatever applies in cooledit.
Then change the framerate of the avi to 23.976. Then encode to MPEG2 ( using the avi and the slowed wav ) and set pulldown on playback, et voila, there you are ;)

The only problem remains, if the PAL source is interlaced :(
The only solution i know of is: First severely deinterlacing and the rest as above.

But since you have AVIs, they should be progressive.
Good luck.

greetz, Uli

[DJ Bobo]

1) Change the framerate in VD to 23,976fps

2) Change the audio duration to:
original length x25 /23,976 = new duration

3) encode to MPEG2/MP2 conserving the 23,976fps framerate

4) add the appropriate flag to your MPEG stream

=> perfect DVD quality! (I wonder, why Anime DVD authors have to telecine the video anyway, this makes quality only worse on the DVD, and makes our rippers life to hell!)

[Tatjahna]

@Uli:

Thanx for your reply! I am really new to this and I thought it wasn't possible to play a PAL DVD on my standalone dvd player! I don't have to do a resize on it (720x480) to make it standard?

I know I will still have to set the DVD region free but it's not a problem in there huh ?

@Uli and DJ Bobo :

Thanx for your receipes :) I will try them right now! As for the conversion of the DVDs, I will set one region free and try to burn it as it already is, just to look :)

Thanx again, I was really in the meadow with the cows I think! And you saved me lots of precious time! :sly:

Ciao!

[Uli]

Originally posted by Tatjahna
...
I don't have to do a resize on it (720x480) to make it standard?
...

I forgot: If you take a PAL DVD ( 720x576 ) as source you shurely have to additionally resize to 720x480 to make it NTSC compliant.

greetz, Uli

[Tatjahna]

Great thanx Uli!

But this PAL DVD will only work in my NTSC video if it is mostly FILM huh?

Thanx :)

[Tatjahna]

Ok guys..

Here's the infos of what I have did

Movie info : 25fps, pcm audio 44khz, avi DivX-4 ;) Low-Motion (anyway!)

1- I have extracted the wav from the avi in question. 22:47.012 min.
2- Did a framerate conversion of that avi from 25 to 23.976 same length approx : 22:47:454.
3- Did all my resize and filters for that new file. same lenght too.
4- Took the extracted wav file, and here's my problem here.. I have 3 radio button choices for "Stretching Mode" when I click on Transform->Time/Pitch->Stretch ( in CoolEdit )
->Time stretch (preserve pitch)
->Pitch shift (preserve tempo)
->Resample (preserve nothing)

I have used the Resample. I have calculated the value length of my wav and it's 1367.012 seconds. So using the formula of 1367.012 * 1.04xxxxxxx, that gave me this : 1425.39xxxxx

but instead of giving me an output file of this, it outputted me 1485.971 sec. that's approximately 1 min and 1 sec over the video file length!

Did I miss something somewhere ??
Help please 'cause I am really not even familiar with CoolEdit and I will probably never use it instead of just removing noise and/or fix the good framerate audio!

Thanx in advance!

[DJ Bobo]

About point 2: making the framerate conversion in VD will change the duration, it won't be the same or nearly the same.

About point 4: you have to use Time Stretch. And if it's not time stretch, just experiment with a little file, till you get what you want :D (sorry I use WaveLab not CoolEdit, that's why I can't tell you exactly)

[Tatjahna]

.... ( some days, trial and errors, and god damning words later ) .....

I have just referenced again on this post because I had to do today the method DJ Bobo just gave me above.. Before doing that, I have tried by memory to do it... :mad: But one thing were wrong.. I didn't set the stretching on "Time Stretch", but on "ReSample" ... I have noticed it still makes a desync at progressive long time.

So my question here is : What is the "DAMNED" difference between the 3 ones : Time Stretch, Pitch Shift, and ReSample ?? :confused:

@DJ Bobo and @Uli : I have noticed that I have forgot to thank you about your methods and I'm really sorry, this was the least I should have do. As I read your messages some days ago, I just ran into CoolEdit to test that and I have forgot to get back to you.

Thanx again guys !