29.997 to 25 conversion with out slow mo effect.

[paul_tp]

I have a film that plays at 29.997 FPS, after reading some guides, I have changed the frame rate of my film to 25FPS, by using besweet to convert the audio to the correct length. and vdub to change the frame rate

While the film is in sync (A fact I could not belive on my first atempt) The problem is running 5ish frames per second slower, the whole film looks like it is in slow motion, and all the voices have changed, Is there any better way of convering to 25FPS from 29.997?

About the only way I can think is to do an inverse pull down to 23 FPS. then convert up to 25FPS, but that could be rubish.

Any help would be great.

Cheers

[Nelson37]

I haven't done this conversion, but I would suggest doing the IVTC first, this will give you 23.9 something, almost 24, and it will be progressive and much higher quality. Audio remains in synch. Then when you change to 25 its only 1 fps change, less chance of distortion.

[tonyp12]

Where is this FILM from?

If it is from a DVD, use Force Film in DVD2AVI.
And it will playback at 23.9
This will work 95% off the time.

If it is a true 29.9 interlaced Video clip, you can NOT do a IVTC.

[paul_tp]

Cheers,

It is a dvd, well vobs, so I will have a go at Force Film, Not sure what effect that will on sync`ing the subtitltes, But I can but try.

I am not 100% sure what IVTC stands for : InVerse ......?

Thanks

[banjazzer]

About the only way I can think is to do an inverse pull down to 23 FPS. then convert up to 25FPS, but that could be rubish.

Why? If you can get to 23.976 fps, the conversion to 25 fps is simple, with none of the problems you are experiencing. If it is a movie, it will have started out at 23.976 fps.

[tonyp12]

IVTC= inverse telecine

I tries to undo the telecine process, were a 23.9 progressive
film have been converted to a interlaced 29.9 video.

If 2 out of 5 frames only shows a comb effect (mouse teeth)
then is was a Film at one time and have been telecined.


NTSC FILM DVDs uses soft telecine,
they are only telecined during playback on you standalone DVD player.

DVD2AVI can ignore this 3:2 pulldown flag (telecine)
and show it in it's true state as stored on the DVD.

[Nelson37]

Yes, definitely, if a DVD rip then use DVD2AVI Forced Film, this removes the soft telecine as stated above and is MUCH better. Few DVD movies are really 29.97, although many TV series are.

[adam]

If you are converting to 25fps then I assume you are in a country that uses PAL.

If this is the case then there is probably no reason to do this conversion at all. With the exception of some older models, pretty much any PAL tv can properly playback an ntsc signal. Even if it cannot, almost any dvd player sold in a PAL region will be able to convert ntsc to PAL 60Hz, which should definitely play on any PAL tv. The bottom line is that if you have a pal setup it really doesnt matter what format your video is in. I recommend you just try burning that video as is, chances are it will work.

[SLK001]

Or, you can do what the studios do. Take the 23.976fps video (actually, it's 24fps with a DROP FRAME flag set), change the framerate to 25fps using various header tools (RESTREAM is one that comes to mind). Then, take the audio and slow it down by 4%, then remux the two back together.