Sodding 23.97 fps

[Hardcoreruss]

Right I hate 23.97 fps. 99% of all of my questions revolve around this stupid fps.

Is there a guide on how to convert these to dvd standard (pal or ntsc). I have tried all manner of things and it always cocks up, funny picture, funny noise.

If any one can give me some pointers it will be greatly appreciated.

Thanks a lot

Russ

[mats.hogberg]

My method is to extract audio (VDub) and convert to wav, change FPS of AVI to 25 with AVIFrate, shorten the audio with WavWorks (or Goldwave->Timewarp), then encode with new wav and 25 fps AVI as audio / video source.

/Mats

[Hardcoreruss]

I have read simply encode as 23.97 fps with 3:2 pulldown in tmpgenc. Will this work ?

And if I extract the audio in virtual dub and add this will it work ok ?

[Roderz]

Right I hate 23.97 fps

me too ... untill
https://www.videohelp.com/forum/viewtopic.php?t=178789

[bugster]

I have read simply encode as 23.97 fps with 3:2 pulldown in tmpgenc. Will this work ?

And if I extract the audio in virtual dub and add this will it work ok ?

Thats what I do and it works fine for me.

[FOO]

You get 29.97 fps that way. I thought you wanted PAL (25)

If its 24 you just speed it up to 25, No encoding
You have to resample the audio though and remove the pulldown flags.

If it's 29.97 you do an Inverse Telecine before the above. (if its' film based )

[Hardcoreruss]

You get 29.97 fps that way. I thought you wanted PAL (25)

If its 24 you just speed it up to 25, No encoding
You have to resample the audio though and remove the pulldown flags.

If it's 29.97 you do an Inverse Telecine before the above. (if its' film based )

I just want to be able to convert it to a dvd complaint file. Both of my players can play both pal and ntsc. I will experiment tonight when I get home and let you all know how it goes.

Thanks for your help !!!

[Roderz]

So I got this ere AVI file AVIcodec says its 23.97fps
I want it to be dvd compliant mpeg1 - say 29.97

A. If I run it through tmpg on th 2nd setting (ntsc film 23.97fps) when I look at the Settings->Advanced the IVTC is checked for me (and I don't check anything else) and the resulting file is 23.97fps.
NOT what I want.

B. If I run it through tmpg on th 1st setting (ntsc 29.97 ) when I look at the Settings->Advanced the NOTHING is checked for me (and I don't check anything else) and the resulting file is 29.97 fps
Yeaaa

So does that mean that the source file allready had pulldown applied to it?

Because the file from B worked a treat when authored as dvd.

And what happens if a file didn't do what happend in A (IVTC checked)?
Would I run through B but check the pulldown box to get 29.97 fps. ?

Sorry to go on, just trying to make things clear as I've never had to bother with this before.

[FOO]

If you want MPEG1 from 23.976 videoyou must do a HARD pulldown
which means actually generating 5 frames out of every 4.
MPEG1 does not support interlacing or SOFT pulldown.

If you want 29.97 MPEG2 from 23.976 source you can either do as above
or apply SOFT pulldown which set flags to tell the decoder to do the above
on the fly.

IVTC does the opposite. 29.97 to 23.976

To save 20% of your bits set TMPGenc to do "pulldown on playback"
with a rate of 23.976 ( 29.97 internaly)

[Roderz]

If you want MPEG1 from 23.976 videoyou must do a HARD pulldown which means actually generating 5 frames out of every 4.
MPEG1 does not support interlacing or SOFT pulldown.

xvid Source reported as 23.976 used 'B' as above and output was 29.97, did NOT do ANY pulldown and it WORKED

NOT doing mpeg2 but yes - SOFT pulldown set flags to tell the decoder to do the pulldown on the fly.

So DO I take it that the source (xvid) file allready had pulldown applied to it

This is getting so confusing, aswell as reading this topic https://www.videohelp.com/forum/viewtopic.php?t=178789

BANGING HEAD ON TABLE

but at least my files now works with dvd authoring S/W weather I understand why or not.

Off 2 the pub I NEED A STELLA ! and god help the local computer 'KNOW IT FUCKALL' yts twat that I come accross!

[FOO]

What happened with plan B was that TMPGenc did
a HARD pulldown probably. Either that or MPEG4 has
soft pulldown and the DEcoder did it and fed 29.97 to TMPGenc

[FulciLives]

I have read simply encode as 23.97 fps with 3:2 pulldown in tmpgenc. Will this work ?

And if I extract the audio in virtual dub and add this will it work ok ?

Yes it will. The easiest way is to use the WIZARD mode selecting the NTSC DVD TEMPLATE

When you load the source file (be it an AVI or D2V or whatever) simply make sure you select NON-INTERLACED and that the type is FILM BASED (not VIDEO BASED) and TMPGEnc will automatically set it up to encode at 23.976fps with 3:2 pulldown. In fact it should set everything correctly without much input from you if using the WIZARD MODE though I've found with some 23.976fps sources it will try to set it to VIDEO BASED when usually you want FILM BASED.

- John "FulciLives" Coleman

*** EDIT ***
If you want to encode the sound with TMPGEnc then there is no need to extract it to a seperate file if the audio is muxed with the video such as in the case of an AVI file.

[Roderz]

Either that or MPEG4 has
soft pulldown and the DEcoder did it and fed 29.97 to TMPGenc

Taaaddaaa
That's what I want to know, how does one tell? (apart from my trial & error bit)

Don't get me wrong, I'm a happy I found a soloution to my mpeg1 (23.97fps)-->mpeg1(29.97) dvd probs, just wish I could get my head around it all + understand it better.

BTW this really f**ked my head up--

The symptoms/clues/indications that I posted in my 2nd post to this topic only appear if I set up tmpg’s environmental setting for XVID --> https://www.videohelp.com/forum/userguides/119019.php

If I right click in environmental setting and 'reset to recommended settings' the symptoms/clues/indications do not appear!
I.E. in the tmpg wiz it will not check ANY boxes in the Settings->Advanced Tab no matter what I do, either A or B (see my2nd post)

Found this by accident after reseting ‘env settings’ to do a dificult divx file today! (again 23.97fps that worked after step B -- 29.97fps)

Anyway hope this helps someone. (my head-doctor's wallet for one!)

[ronnylov]

Using avisynth command AssumeFPS(25.0,true) is all I need to do to convert from 23.97 fps to 25 fps. The sound is synced to the new video frame rate by the "true" parameter. Of course I also must convert to correct frame size for PAL DVD.

[DJRumpy]

Roderz, the specific option your looking for is under the SETTING | VIDEO tab. Set your 'Encode Mode' to "3:2 Pulldown when playback", and then set your 'Frame Rate' setting to "23.976 fps (internally 29.97 fps)". You must do them in that order. If the Encode Mode is not set to 23.976, then the 3:2 Pulldown option under Frame Rate will not be available. I don't know why the author placed them in that order in the GUI, since it's not intuative. Anyway, those settings will take a 23.976 fps input file, and produce an output file that looks like 29.97fps.

None of the checkboxes under the Advanced tab need to be checked for this process.

TMPGenc essentially encodes your file as 23.976fps, and then applies pulldown to the file, to make it appear as 29.97fps. This file can be dropped into any encoder as 'compliant', assuming everything else, such as resolution, bitrate, etc. is compliant as well.

If your file is MPEG1, you can leave it at 23.976fps. It's not necessary that it be 29.97fps (VCD supports 23.976 natively). If your file is MPEG2, then these are the settings you will need to produce a complaint MPEG-2 file.