NTSC->PAL MPEG conversion... 29.97fps -> 25fps & resizing to

[Lambchop]

I've seen a couple of posts about converting the other way round, ut what is the best was to carry out this NTSC->PAL MPEG conversion??
Also, if anyone has any hints on my interlacing problem on this thread that would be great!
Thanks!

****EDIT - I basically want to convert NTSC to PAL, so I also need to resize from 480 pixel height to 576. Can I do this by adding black bars to the top and bottom of the picture like a letterbox picture, and if so, how?

<font size=-1>[ This Message was edited by: Lambchop on 2001-11-04 11:55:35 ]</font>

<font size=-1>[ This Message was edited by: Lambchop on 2001-11-05 13:18:06 ]</font>

[vitualis]

Use some form of 3:2 pulldown removal to go from 29.97 fps --> 23.976 fps.

Then, speed up 23.976 fps to 25 fps.

Regards.

[Lambchop]

Thanks ...but why do it in two steps like that?? Also, how do I do it!

[vitualis]

You do it this way because it is probably the BEST way.

Using 3:2 pulldown removal (like ?inverse telcine) gives you smooth 23.976 fps video (NTSC-FILM). Depending on the source, you may even get progressive video.

The best way to get PAL framerates from NTSC-FILM is to then speed up the video by a little bit over 4% to 25 fps.

I don't know if you can do this all in one step... perhaps you can, but I don't know how (probably with an AVISynth script).

You can definitely do the second step with an avisynth script: http://www.vcdhelp.com/phpBB/viewtopic.php?topic=44501&forum=3

Regards.

_________________
Michael Tam

<font size=-1>[ This Message was edited by: vitualis on 2001-11-04 05:20:06 ]</font>

[Lambchop]

I havn't tested extensively, and have lent my NTSC source VCD to a friend, but I was wondering, what is the difference between doing the above, and simply frameserving an NTSC source to TMpegEnc and encoding as a PAL VCD???

[otv]

This is the two softwares I have tried (NTSC to PAL) and somehow worked.
But it is still a lot of time and effort, plus
the end of the movie has gone from the pal version.
No clue why.

pulldown.exe for the video,

wla.exe for the audo part.


good luck

<TABLE BORDER=0 ALIGN=CENTER WIDTH=85%><TR><TD><font size=-1>Quote:</font><HR size=1 color=black></TD></TR><TR><TD><FONT SIZE=-1><BLOCKQUOTE>
On 2001-11-04 04:52:43, Lambchop wrote:
I've seen a couple of posts about converting the other way round, ut what is the best was to carry out this NTSC->PAL MPEG conversion??
Also, if anyone has any hints on my interlacing problem on this thread that would be great!
Thanks!

****EDIT - I basically want to convert NTSC to PAL, so I also need to resize from 480 pixel height to 576. Can I do this by adding black bars to the top and bottom of the picture like a letterbox picture, and if so, how?

<font size=-1>[ This Message was edited by: Lambchop on 2001-11-04 11:55:35 ]</font>

<font size=-1>[ This Message was edited by: Lambchop on 2001-11-05 13:18:06 ]</font>
</BLOCKQUOTE></FONT></TD></TR><TR><TD><HR size=1 color=black></TD></TR></TABLE>

[Lambchop]

Thanks...where can I get these programs??
Is the pulldown option in TmpegEnc the same thing??

[vitualis]

I have to say that I'm somewhat skeptical of the above...

Pulldown.exe puts in the 3:2 pulldown flags so that 23.976 fps video (NTSC-FILM) is played back at 29.97 fps by the DVD player.

The pulldown option in TMPGEnc does a similar thing (i.e., 23.976 --> 29.97 fps). This obviously does not help you if you want to go from NTSC to PAL.

Lambchop, the problem with frameserving an NTSC source to TMPGEnc on a PAL template is simple. NO MPEG encoder knows how to do a non-trivial framerate conversion (e.g., 29.97 --> 25 fps) well. Thus, in this case, it will probably regularly drop frames. This leads to video with regular skipping that is unwatchable.

As for resizing 480 --> 576, TMPGEnc should be able to do this. DO NOT letterbox. Otherwise you will stuff up the aspect ratio and the picture in the resultant PAL clip will look squashed.

Regards.

[Lambchop]

Sorry I'm a little slow on this subject -- to get 29.97->23.976fps, I use the inverse telcine option in TMpegEnc????

Then speed up to 25fps for PAL (I presumeably have to alter the audio length then - what is the best way to do this and preserve pitch? I have Cool Edit, but am not convinced it always gives good quality results when doing this).
thanks for your help and input!

[vitualis]

<TABLE BORDER=0 ALIGN=CENTER WIDTH=85%><TR><TD><font size=-1>Quote:</font><HR size=1 color=black></TD></TR><TR><TD><FONT SIZE=-1><BLOCKQUOTE>
On 2001-11-06 11:40:00, Lambchop wrote:
Sorry I'm a little slow on this subject -- to get 29.97->23.976fps, I use the inverse telcine option in TMpegEnc????</BLOCKQUOTE></FONT></TD></TR><TR><TD><HR size=1 color=black></TD></TR></TABLE>

Maybe... I honestly don't know for sure because I never have to do this (I live in a PAL country). There is also 3:2 pulldown removal in VirtualDub.

<TABLE BORDER=0 ALIGN=CENTER WIDTH=85%><TR><TD><font size=-1>Quote:</font><HR size=1 color=black></TD></TR><TR><TD><FONT SIZE=-1><BLOCKQUOTE>Then speed up to 25fps for PAL (I presumeably have to alter the audio length then - what is the best way to do this and preserve pitch? I have Cool Edit, but am not convinced it always gives good quality results when doing this).
thanks for your help and input! </BLOCKQUOTE></FONT></TD></TR><TR><TD><HR size=1 color=black></TD></TR></TABLE>

If you use Cooledit, set it so that neither pitch or tempo is maintained. The end result will sound a little bit funny, but that's only because you know what it ORGINALLY sounded like. People in PAL countries usually have this type of audio and nobody is the wiser. After listening to it for a while, it will seem second nature.

If you set it to preserve pitch, it takes longer and doesn't turn out well (trust me!).

You can speed up both the video (from 23.976) and audio at the same time if you use the AVISynth script (thus bypassing the need for CoolEdit).

Regards.
[/quote]

[Lambchop]

Thanks...I'll give that a go as soon as I get a chance to recapture the video!
Trouble is, I can't get to the Avisynth Script link above...

<font size=-1>[ This Message was edited by: Lambchop on 2001-11-06 12:20:51 ]</font>

[paramute]

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On 2001-11-06 12:17:14, Lambchop wrote:
Thanks...I'll give that a go as soon as I get a chance to recapture the video!
Trouble is, I can't get to the Avisynth Script link above...

<font size=-1>[ This Message was edited by: Lambchop on 2001-11-06 12:20:51 ]</font>
</BLOCKQUOTE></FONT></TD></TR><TR><TD><HR size=1 color=black></TD></TR></TABLE>

I can't get to work either:

You can definitely do the second step with an avisynth script: http://www.vcdhelp.com/phpBB/viewtopic.php?topic=44501&forum=3

Has it moved?