23.976 to 24.0

[ottermi619]

I ran inverse telecine on an old cartoon short selection using VirtualDub-MPEG2, and had it encoded with WM-9 VCM. My final step is to remaster the audio, and compile the streams with Windows Media Encoder 9. The final product will be a WMV9 file at exactly 24.0fps, not the 23.976 set by the inverse telecine function. Is there a way to either convert the source AVI from 23.976 to 24.0 without recompression, or is a pulldown inevitable?

[Episode]

Is there any reason why you want 24fps instead of 23.976?

[vinetu]

Is there any reason why you want 24fps instead of 23.976?
Episode,

The question from ottermi619 is clear enough :

How to convert the source AVI from 23.976 to 24.0 without recompression?

Is your post contain the answer? I don't think so! ...Then may be you want to know what is the content of ottermi619's file? On which exactly P2P networks he's downloaded his avi?

HMMM!!! Episode,Your post break Forum rules 3,4,11 !


@ottermi619 open your avi in VirtualDub-MPEG2 - set there Video->"direct stream copy" and also Video->"Frame Rate->Change to..." then "Save as avi" .You better run this with audio disabled.

[Episode]

Oh come on, I was just curious to know why he wants to do such thing. That way I could perhaps help him better with his problem. If my post insulted someone and really broke the rules, I'm really sorry, it won't happen ever again.

But back on the topic, I have been using this program for this kind of task: http://www.doom9.org/Soft21/Editing/avifrate110.zip. I also used besweet for correcting the audio to mach new framerate. But I guess it's just matter of taste which tool you use for it.

[Inventive Software]

In AviSynth:

AVISource("file.avi")
AssumeFPS(24)


To do the audio, you have to change the audio tempo, like so:

ChangeSpeed(tempo="(24/23.976)*100")


Look at the AviSynth help for more info.

[edit]Having tried this out, it should not have been 23.976/24 as this would have given a slightly slower file. It really should have been 24/23.976, apologies if this confused people. I was rather tired at the time! Also, doing the calculation above (24/23.976) will give a recurring number (1.001001001 etc) so you have to put the exact calculation in the inverted commas.

This will give you a slightly shorter file length. If you are in VDub or VDubMod you can do a "Direct Stream Copy" on the video and audio. This will take very little time as all it's doing is demuxing the audio and video and re-muxing it to a new file, albeit with the changes.

Apologies if this is wrong. The computer I use to access the internet does not have VDubMod or AviSynth, so I can't try it.

[MeteorRain]

My final step is to remaster the audio, and compile the streams with Windows Media Encoder 9.you will compile the streams? do you mean you will compress the video as well? or only audios to wma?
WME seems will produce a vfr wmv file if necessary. and so this may cause your video not being 23.976 or 24fps. it may become 26.908 or so.
if you just want to change fps from 23976 to 24, change it in framerate in VDM is ok but this will reduce the movie length.
or you can keep the length, but you have to duplicate frames to fill the 0.024fps

so, well, could you tell us the reason why you want to change the fps? maybe we can give you more suggestions.