Convert 29.967 to 29.970

[jin007]

How do I go about converting audio from 29.967 to 29.970. I got a dvd and the video is 29.970 but the audio is at 29.967 and this is an official dvd, I dont know why it's like that. I want to extract the audio and put it into another video source but the fps is off.

I forgot to add, I tried in besweet and it gave me a 16mb file for some reason. The original is 130mb and 1 hour 21 minutes long.

[poisondeathray]

One option is to use belight/besweet, in the advanced options you can enter the frame rate conversion

Another is to use any audio editor (like audacity) and shrink the audio by that exact fraction 29.967/29.97 (to speed up the audio)

Note that it might still be off, since different retail DVD's might have different scene editing, etc.. so it might take some trial & error.

[jin007]

hi, i tried besweet and put in the two numbers and it gave me a 16mb file for some reason, if i use the presets like ntsc to pal it will produce a correct file size but not when i put in manual numbers.

How do you go about doing this in audacity, the online guide i found was to convert pal to ntsc or ntsc to pal.

is there a good guide out there?

[poisondeathray]

Is original format AC3?

[SLK001]

What kind of audio is ever listed as "FPS" instead of bits per second?

[jin007]

mpeg audio stream. I loaded into vdubmod and thats what it says, i then hit the save as .wav button and then loaded the .wav into besweet.

ok bits per second then, still this is the first i ever encountered from an official dvd that did not match the fps of the video.

[poisondeathray]

Check your duration(s) with mediainfo. The audio of different movies versions is usually the same length. Usually the video FPS is different. If it doesn't match, just shrink/expand the audio by that fraction

[jin007]

the duration of the .wav i extracted is fine. The entier movie plays just fine but what i am trying to do is take the audio from this one and put it into another video source but since the audio is wacky on this dvd it's not working quite right.

I did this alredy last week. I took the ntsc audio from my us dvd and extracted it so i can then use it on my pal uncut version dvd and it worked, i had to adjust the audio in certain portions because it goes out of wack.

but this one goes out of wack even more, so i want it to be 29.970

taking audio from one source and using it on a different source is not easy, I already realized this but i would like to make this project a bit easier on me.



Since we are on the subject I just want to add this which i find odd.

regarding that first project i was talking about, I had a really tough time getting the ntsc audio to pal settings so I just used the standard ntsc audio and kept shifting it to match it up with the video and it worked. But if i try to actually get the ntsc audio to convert to pal, it does not work, it behaves like this current project of mines, it goes out of wack almost every 10 seconds.

[poisondeathray]

If the duration is equivalent, then they match. Recall what I said earlier about different version of the movie. Some scenes may be different, causing it to not match.

Audio doesn't have a "FPS", per se, only video does

Assuming that is what you meant, and the durations DON'T match here are the steps for shrinking/expanding in audacity (assuming you properly saved as WAV from vdub)

1) open WAV in audacity
2) crtl+A to select all
3) effect=>change speed
4) enter number (percent change + or -) then ok
5) file=>export as wav

Cheers

[SLK001]

MPEG-1 Audio Layer II (MP2) audio is still listed in bits-per-second. And MP2 audio is the only MPEG audio format that is in the DVD standard.

Perhaps you know of another MPEG format that is listed in fps?

[jin007]

cool, i will try that, thanks for the easy to follow step.

[manono]

How do I go about converting audio from 29.967 to 29.970.

If the audio and video for the source NTSC DVD are in synch the whole way through, then I don't really think there's anything at all wrong with your audio. If, after being converted to PAL length it doesn't synch up, that could be because you thought it was originally for a 29.97fps movie where you really have a 23.976fps movie. And therefore if using the BeSweet presets, instead of using 29.970->25.000, you should be using 23.976->25.000.