Sound from cinema (30fps) put into a Divx file (24fps)

[Episodio1]

I have recorded the sound directly from cinema, to put it into a Divx file.

My problem is that the sound goes faster than video Divx (because of the 30fps from cinema to 23'975fps from DivX).

I have tried with NERO WAVE EDITOR and his TIME CORRECTION option. It worked almost fine... I dont find the exact percentage to apply to the sound file.

I think it is between 105.00% and 106.00%, but I need the exact number to achieve perfect coordination during the whole movie.

Which is the exact number?

If anyone tried with other software tools (such as SOUND FORGE or COOL EDIT2000), please, tell me what to do, and the exact values needed for this task.

Thank you...


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[zambelli]

The film in the cinema can't be running at 30 fps unless it's played off a tape or disc. If it's running off a film reel it is most certainly running at 24 fps.

But if you're absolutely positive that such is the case, why don't you simply slow down your audio by 80% (24/30)?

[Episodio1]

¿?¿? You are wrong.. Cinema is 30 fps... video is 24fps.

But, ok, supposing is not that way... What I want is to adjust the audio speed to the video speed.

I know that 24/30 = 80%, but NERO WAVE EDITOR uses an option called TIME CORRECTION (to achieve that goal). This option enlarges the audio file according to a %.

If I choose 105%, the sound is still faster than video.

If I choose 106%, the sound is slower than video.

So I need an exact value between both, either with NERO W.E., or other audiosoftware.


Thanks...


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[billou2k]

Well I think there are some points to fix here.
Cinema is ALSWAYS 24 fps.
your dvd may be in 29.97 fps (zone1) because it has been telecined to be compatible with your tv system that is 29.97hz.
and in order to get good divx quality you need to get 24fps progressive cause divx cant deal with telecined stuff.
so it might not change many things for your problem but well things are that way.
as i m in zone2 i dont have telecined material.
i only have few zone1 dvds and didnt have many problems to get the sound synchronised in divx 24fps cause the sound is still running the same speed.
what softs are u using?
avisynth ivtc + besweet worked fine for me with the few 29.97fps stuff i tried.
I hope it can help.

[Episodio1]

Lets see.. I dont have any DVD.

There is a difference... cause Im writign from Europe... PAL TV... that is 24 fps.... and 50Hz. :o)

NTSC is 29'9 fps....

Sorry for not to tell you...


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[zambelli]

Doom9 has many guides. It's a shame you're not reading them.

PAL is 25 fps. NTSC is 29.97 fps. Film is 24 (23.976) fps.

If you need less than 1% adjustment, consider changing the framerate of your AVI by 0.001 fps increments using AVIFrate.

[Taric25]

Why don't you just adjust the video to fit the audio? Since you have DivX, you can just change the video framerate to match the audio in VirtualDub. After that, if you want to change the framerate to something else, you can open it in TMPEG, make your settings, save your project, frameserve via VFAPI and encode to DivX. Since you can choose Direct stream copy in VirtualDub, you shouldn't loose to much video quality. Even if you encode back and forth to DivX, unless your video's bitrate is really really low, it shouldn't give you bad results.

As for Audio, since you'll (I assume) change the video to match, you shouldn't have to change the pitch of the audio. This, in my opinion, is MUCH WORSE . I hate to change the audio pitch. :rolleyes:

[Pio2001]

Just came to this forum since a long time to ask something, and I noticed this question, whose answer is very easy (at least with Virtual Dub).

So in VirtualDub, open the DivX, in Audio, select your audio, with "direct stream copy". In video, select "direct stream copy" too.
So far it'll just join the movie with the sound, but out of synch.

Now, go to video/frame rate, and check "change to", there, put 24 instead of 23.975.

Save your AVI, nor the video nor the audio will be processed. The fps flag in the video will just be changed to 24, so that the media player plays it at 24 fps, in synch with the audio :)