Perfect Conversion of NTSC tp PAL without judder

[t0nito]

Hi I just found out how to convert NTSC to PAL

1. Open your NTSC file with TMPGEnc and choose dvd PAL template
2. Open the unlock template and change 25fps to 24 fps
3. In settings choose inverse telecine at 24fps motion prioritized and de-interlace none
4. Output as a avi file choose best quality in compressor settings
5. After creating the new avi at 24fps output the same video as a wave file
6. With Avifrate change the frame rate of the new avi to 25
7. With winamp choose the pacemaker plugin (must download) and raise the pitch in +4% Choose the output to a new wave file with the disk writter plugin
8. Finally in TMPGEnc open the now 25fps avi you've created and in audio open the wav file with the 4% pitch encode with the DVD PAL template.

There you go! It's kind of complicated but it works quite nicely. If you know an easier way to do it I would like to know about it. I hope this helps for those who wish to convert NTSC to PAL. If you succeed I'd like to hear about it.

(I used TMPGEnc 2.51)

[dvbr]

Hi,

I've post some tips for that, but when I was just posting another one when the forum came down

I was posting a tip about converting the inverse telecined mpeg from 24 fps to 25 fps. I don't remember from where I downloaded http://dvbr.vila.bol.com.br/frame_convert.zip , it's a set of utilities for changing the framerate from ntsc2film , pal2film , film2pal.. You have to use Film2pal.exe

For audio I will suggest the Sound Forge, but it's not free, it has a function called time stretch, that can make negative stretch (compress). It doesn't change the pitch, it interpolates the waves. So it change the duration without changing the frequencies.

I've experience making the opposite: from PAL to NTSC, but it's aliked.


Regards

[t0nito]

Thank you very much for your reply. I'll test your method.

[t0nito]

About the inverse telecine. After few more test I found out that choosing automatic deinterlacing gives better results when things are moving a bit faster on the resulting PAL video.

[DMaarten]

Just a little bump because I wanted to know if people have tried this method yet.. did it work ok? No sound errors? I'm trying something now but if that f*ckes up the sound again I'll try this methode

[t0nito]

Well it worked very nicely to me. The only sound problem you may get is when you are speeding the sound to 4%. I advise changing the speed but not the pitch. I mentioned winamp's plugin Pacemaker. But you can use any other program that can this like goldwave, etc... Try it! I tried it with a clip from my vcr. I couldn't tell the difference between the NTSC mpg from the PAL mpg of the same clip.

[DMaarten]

Well the other methode worked perfectly for me so I don't need to try this anymore, but thanx for teh response anyway

<edit>
Celebrated too soon The sound is in sync at first but after a while it gets more and more off sync maybe your methode will work afterall..

[CastoR]

My Way: (S)VCD-NTSC to VCD-PAL (Short Guide)

1. Copy mpegs from (S)VCD to hd naming them file1, file2, ...
2. Make DVD2AVI Project.
in "Field Operation"
if (S)VCD=29.97 fps the Force FILM
if (S)VCD=23.976 then NONE
3. Convert .mpa to .wav with Winamp.
4. Framerate convert .wav (23.976) to .mp2 (25 fps) with BeSweet.
Switch : -ota( -r 960 1001 )
(When I try to convert the .mpa file directly with BeSweet it get to short thats why I use Winamp.)
5. Convert video .d2v (23.976) to mpeg (25 fps) with TMPGEnc.
Load .d2v file.
Chose Template
In Setting->Advanced set aspect ratio.
And tick "Do not frame rate conversion".
Encode
6. Mux Video and Audio with TMPGEnc (File->Mpeg Tools).

[KuskenLars]

The audio can be altered in a quicker way but it isn't too easy...

I've learned that if you "hack" the audio you can get perfect sync in 24 FPS -> 25 FPS without any encoding!

(The audio will get pitched slightly if I remember totaly correct, it's been a while since I did it the last time)

I can't remember the exact numbers to use but you'll need to change the SamplesPerSec (Usually 44100 or 48000) you'll need to calculate the new SamplesPerSec using a quick calculation.


(New FPS/Current FPS)*SamplesPerSec

Example: I have a file that's 24 FPS with audio in 44100 SamplesPerSec and I want to get it in 25 FPS with synced audio...
The equation will be as follows:
(25/24)*44100 = 45937,5 SamplesPerSec, but will round it to 45938...

HOWEVER; I haven't tried this with an entire movie, just bits and pieces...

To change the SamplesPerSec you'll need a tool like HexEdit or so...
To find the right value search for the current SamplesPerSec as integer, probably using long (Can't remember totaly, sorry...)
The first you'll find will be the right one...

but please BACK UP; I'm not giving any guarantees!!!

[CastoR]

KuskenLars, what type of audio format .wav .mp2 .mp3???

[KuskenLars]

I think that I've tried MP3 and WAV... not mp2, but you could try... =)

[CastoR]

Thanks I will try it asap and post my results.

[KuskenLars]

OK!
Perhaps a guide should be written

[CastoR]

Ok I looked into the formats and it seems that there is no way
to hexedit mp2 and mp3.

Here is some info about wav.
SamplesPerSec (Long) Offset : HEX 18, DEC 24

Ex.
Offset 1A - 44 AC 00 00 (44100)

Have not tried it myself but if KuskenLars way work then you now know were to change.

I got BeSweet to convert from .mpa(ntcs) to .mp2(pal).
So now it's just to skip the WinAmp part.

[CastoR]

More:

KuskenLars Example

The equation will be as follows:
(25/24)*44100 = 45937,5 SamplesPerSec, but will round it to 45938...

Change:

Offset 1A - 44 AC 00 00 (44100) to
Offset 1A - 72 B3 00 00 (45938)

[KuskenLars]

Just a tip, you can use HIEW (Hackers View) to alter a file without re-saving it; it just alters the file...

It is a DOS program...

I'll perhaps write a guide if I have more time =)

[t0nito]

I was wondering if there is any way for this guide to be added in the How to's section? I think it would help those who wish to convert NTSC to PAL without having any frame losses.